JP6941338B2 - Syringe for dental filling material and the tip of the cylinder and ring-shaped cap used for this. - Google Patents

Description

The present invention relates to a syringe for dental filling material and a tubular body tip portion and a ring-shaped cap used therein.

In dental treatment of rodents and the like, treatment is performed using a dental filling material such as a high-viscosity paste-like photocurable composition called a composite resin. This dental filling material is stored in a state of being filled in a syringe for dental filling material in which the dental filling material can be visually recognized at a widely opened discharge port as exemplified in Patent Documents 1 and 2. In dental treatment, the required amount is discharged from a syringe for dental filling material and used. This syringe for dental filling material is composed of a black or white monotone color resin member, and a product name or the like is written on the surface as needed.

In addition, in order to ensure the aesthetics of the treated area, it is important to match the color tone of the tooth restoration target area and its surroundings with the dental filling material used for the treatment. Therefore, in order to facilitate highly aesthetic treatment, the dental filling material is placed for dental filling material so that not only the color tone of the dental filling material under the environment observed on the white kneaded Japanese paper but also the color tone in the oral cavity can be accurately confirmed. A body has been proposed (Patent Document 3).

Japanese Unexamined Patent Publication No. 2000-325362 JP-A-2010-162111 Japanese Unexamined Patent Publication No. 2009-22433

On the other hand, when the dental filling material mounting body described in Patent Document 3 and the conventional syringe for dental filling material are combined to perform treatment from an aesthetic point of view in actual dental treatment, the following steps 1 to 1 are performed. It is necessary to sequentially carry out the operations shown in 4.
(Step 1) Confirm the color tone of the repair target part in the oral cavity and its vicinity.
(Step 2) The required amount of the dental filling material filled in the syringe for the dental filling material is placed on the mounting body for the dental filling material.
(Step 3) Confirm the color tone of the dental filling material placed on the dental filling material mounting body.
(Step 4) If it is judged that the color tone of the oral cavity to be repaired and its vicinity and the color tone of the dental filling material placed on the dental filling material resting body have a high degree of matching, the repair target part Is filled with a dental filling material, and if necessary, the dental filling material is formed into a desired shape, and then the dental filling material is polymerized and cured.

Therefore, if the dental filling material mounting body described in Patent Document 3 is used in steps 2 and 3, whether or not the color tone of the dental filling material matches the color tone of the restoration target portion in the oral cavity in step 4. Because the judgment can be made more accurately, highly aesthetic treatment can be performed more easily than when only a conventional syringe for dental filling material is used.

However, if the degree of matching between the color tone of the dental filling material and the color tone of the restoration target portion is low, all the dental filling material taken out from the syringe for dental filling material in step 2 is wasted.

The present invention has been made in view of the above circumstances, and is a syringe for a dental filling material capable of suppressing waste of the dental filling material due to a color tone confirmation work during dental treatment, and a cylinder tip and a ring-shaped cap used for the syringe. The challenge is to provide.

The above object is achieved by the following invention. That is,
The syringe for dental filling material of the present invention has a cylinder having openings at both ends and an opening at one end forming a discharge port, and the inside of the cylinder is slidably arranged along the axial direction of the cylinder. At least one surface selected from the inner side surface and the outer side surface of the tip portion of the cylinder, which includes at least an extruded member and forms a portion of the cylinder near the discharge port, is 2 along the circumferential direction of the tip of the cylinder. When the two regions are divided into two or more regions and the two regions adjacent to each other in the circumferential direction of the tubular body are color-coded so as to be different from each other, the first region is selected from the two or more regions. The region is the L ^* a ^* b ^* color system specified by JISZ8729 {(a ^* ) ² + (b ^* ) ² } ^1/2 value is 3 or less and L ^* value is 30 or less. The second region, which has one color tone and is selected from two or more regions, is the {(a ^* ) ² + (b ^* ) ² } ^{1 in the L *} a ^* b ^{* color system specified in JIS Z8729.} It is characterized by having a second color tone having a ^{/ 2} value of 11 or less and an L ^{* value of 90 or more.}

In one embodiment of the syringe for dental filling material of the present invention, at least the inner surface of the tip of the cylinder is divided into two or more regions along the circumferential direction of the tip of the cylinder, and the tip of the cylinder is formed. It is preferable that the colors of the two regions adjacent to each other in the circumferential direction are color-coded so as to be different from each other.

In another embodiment of the syringe for dental filling material of the present invention, the inner surface and the outer surface of the tip of the cylinder are divided into two or more regions along the circumferential direction of the tip of the cylinder, and the cylinder is formed. It is preferable that the two regions adjacent to each other in the circumferential direction of the tip portion are color-coded so that the color tones are different from each other.

In another embodiment of the dental filling material syringe of the present invention, two or more regions include three regions, and a third region selected from the two or more regions is L ^{* specified in JISZ8729.} a ^* b ^* 3 color tones in the range of a ^* ≧ 10, b ^* ≧ -20, a ^* ＞ b ^* /0.88+18.2, 90 ^{≧ L *} ≧ 40 in the color system, and JISZ8729. From the group consisting of the fourth color tone in the range of 3 <{(a ^* ) ² + (b ^* ) ² } ^1/2 <11, 90> L ^{* > 30 in the L *} a ^* b ^{* color system.} It is preferable to have any of the tones selected.

In another embodiment of the dental filling material syringe of the present invention, two or more regions include four regions and a third region selected from the two or more regions is L ^{* specified in JISZ8729.} It has a third color tone in the range of a ^* ≧ 10, b ^* ≧ -20, a ^* ＞ b ^* /0.88+18.2, 90 ^{≧ L * ≧ 40 in the a *} b ^{* color system, and two or more.} The fourth region selected from the regions of is 3 <{(a ^* ) ² + (b ^* ) ² } ^1/2 <11, 90> in the ^{L *} a ^* b ^{* color system specified in JIS Z8729.} It is preferable to have a fourth color tone in the range of L ^{*> 30.}

In another embodiment of the syringe for dental filling material of the present invention, the tubular body has a tubular body having openings at both ends and a tubular tip detachably attached to one end of the tubular body. And, preferably.

In another embodiment of the syringe for dental filling material of the present invention, it is preferable that the dental filling material to be filled in the cylinder is a dental filling material made of a photopolymerizable composition.

The tip of the tubular body of the syringe for dental filling material of the present invention is detachably attached to one end of the tubular body main body having openings at both ends, and has openings at both ends. For dental filling materials including at least a tubular body tip having an opening at one end forming a discharge port and an extruded member slidably arranged in the tubular body along the axial direction of the tubular body. At least one surface of the tip of the cylinder constituting the syringe, selected from the inner surface and the outer surface of the tip of the cylinder, is divided into two or more regions along the circumferential direction of the tip of the cylinder. In addition, when the color tones of two regions adjacent to each other in the circumferential direction of the tip of the cylinder are color-coded so as to be different from each other, the first region selected from the two or more regions is standardized by JISZ8729. {(A ^* ) ² + (b ^* ) ² } in the L ^* a ^* b ^* color system, which has a first color tone with a ^1/2 value of 3 or less and an L ^{* value of 30 or less, 2} The second region selected from one or more regions has a {(a ^* ) ² + (b ^* ) ² } ^{1/2 value in the L *} a ^* b ^* color system specified in JISZ8729 of 11 or less. Moreover, it is characterized by having a second color tone having ^{an L * value of 90 or more.}

The ring-shaped cap of the syringe for dental filling material of the first invention has openings at both ends, and the opening at one end forms a discharge port, and the inside of the cylinder is along the axial direction of the cylinder. A ring-shaped cap attached to the discharge port of a syringe for dental filling material comprising a slidable extruded member and at least one surface selected from the inner and outer surfaces of the ring-shaped cap. Is divided into two or more regions along the circumferential direction of the ring-shaped cap, and the two regions adjacent to the circumferential direction of the ring-shaped cap are color-coded so as to be different from each other. The first region selected from two or more regions is the {(a ^* ) ² + (b ^* ) ² } ^{1/2 value in the L *} a ^* b ^* color tone system specified in JISZ8729 is 3 or less. In addition, the second region selected from two or more regions having the first color tone having ^{an L *} value of 30 or less is {(a ^* a ^* b ^{* in the L * a * b * color system specified in JISZ8729. *} ) ² + (b ^* ) ² } It is characterized by having a second color tone having a ^1/2 value of 11 or less and an L ^{* value of 90 or more.}

The ring-shaped cap of the first dental filling material syringe of the present invention has an opening at both ends, and the opening at one end forms a discharge port, and the inside of the cylinder is formed along the axial direction of the cylinder. The entire inner and outer surfaces of the tip of the cylinder, which is provided with at least an extruded member that is slidably arranged and forms a portion near the discharge port, has an L ^* a ^* b ^* color tone specified in JIS Z8729. {(A ^* ) ² + (b ^* ) ² } ^1/2 value in the system is 3 or less and the L ^* value is 30 or less in the first color tone, and L ^* a ^* b ^{* specified by JISZ8729.} One of the color ^{tones selected from the group consisting of {(a *} ) ² + (b ^* ) ² } ^1/2 value of 11 or less and L ^* value of 90 or more in the second color tone in the color system. A ring-shaped cap attached to the discharge port of a syringe for dental filling material having a ring-shaped cap, which is selected from the two or more regions when the ring-shaped cap is divided into two or more regions along the circumferential direction. A second region selected from two or more regions, the first region consisting of a transparent member or a gap portion formed excluding a member occupying the first region of the ring-shaped cap. Of these, at least one surface selected from the inner surface and the outer surface of the ring-shaped cap is the color tone selected as the color tone of the entire inner surface and outer surface of the tip of the cylinder among the first color tone and the second color tone. It is characterized by having a color tone different from that of.

According to the present invention, it is possible to provide a syringe for a dental filling material capable of suppressing the occurrence of waste of the dental filling material due to a color tone confirmation work during dental treatment, and a cylinder tip portion and a ring-shaped cap used for the syringe.

It is an external perspective view which shows an example of the syringe for dental filling material of this embodiment. It is a partial cross-sectional view which shows an example of the internal structure of the syringe for dental filling material shown in FIG. It is sectional drawing which shows an example of the cross-sectional structure of the tip part of the cylinder which forms the part near the discharge port in the cylinder which constitutes the syringe for dental filling material of this embodiment. It is a developed plan view which shows an example of the coloring on the inner side surface and the outer side surface of the cylinder tip portion of the syringe of this embodiment. Here, FIG. 4 (A) is a developed plan view showing coloring on the inner surface of the tip of the cylinder, and FIG. 4 (B) is a developed plan showing coloring on the outer surface of the tip of the cylinder. Is. It is a developed plan view which shows the other example of the coloring on the inner side surface and the outer side surface of the tubular body tip portion of the syringe of this embodiment. Here, FIG. 5 (A) is a developed plan view showing coloring on the inner surface of the tip of the cylinder, and FIG. 5 (B) is a developed plan showing coloring on the outer surface of the tip of the cylinder. Is. It is a developed plan view which shows the other example of the coloring on the inner side surface and the outer side surface of the tubular body tip portion of the syringe of this embodiment. Here, FIG. 6 (A) is a developed plan view showing coloring on the inner surface of the tip of the cylinder, and FIG. 6 (B) is a developed plan showing coloring on the outer surface of the tip of the cylinder. Is. It is a developed plan view which shows the other example of the coloring on the inner side surface and the outer side surface of the tubular body tip portion of the syringe of this embodiment. Here, FIG. 7 (A) is a developed plan view showing coloring on the inner surface of the tip of the cylinder, and FIG. 7 (B) is a developed plan showing coloring on the outer surface of the tip of the cylinder. Is. It is a developed plan view which shows the other example of the coloring on the inner side surface and the outer side surface of the tubular body tip portion of the syringe of this embodiment. Here, FIG. 8 (A) is a developed plan view showing coloring on the inner surface of the tip of the cylinder, and FIG. 8 (B) is a developed plan showing coloring on the outer surface of the tip of the cylinder. Is. It is a side view which shows another example of the syringe for dental filling material of this embodiment. It is a schematic diagram which shows an example of the ring-shaped cap of the syringe for dental filling material of 1st Embodiment. Here, FIG. 10 (A) is a side view of the ring-shaped cap, and FIG. 10 (B) shows the ring-shaped cap shown in FIG. 10 (A) with respect to the discharge port of a conventional syringe for dental filling material. It is sectional drawing which shows an example of the sectional structure in the attached state. It is a top view of the kneaded Japanese paper used in Comparative Example 1.

1 and 2 are schematic views showing an example of a syringe for dental filling material (hereinafter, may be abbreviated as “syringe”) of the present embodiment. Here, the syringe 10A (10) of the present embodiment has openings 20 and 30 at both ends, respectively, and a cylinder 40 having an opening 20 at one end forming a discharge port 20 and a cylinder 40 inside the cylinder 40. It is provided with a columnar extruded member 50 which is slidably arranged along the axial direction A1 of the above and whose outer surface is in contact with the inner surface of the tubular body 40 with substantially no gap. When this syringe 10A is used, the tubular body 40 is filled with the dental filling material, and when the dental filling material is discharged from the discharge port 20, the extrusion member 50 is slid toward the discharge port 20 side. , The dental filling material filled in the cylinder 40 is pushed out of the cylinder 40 through the discharge port 20.

The structure of the syringe 10A is not particularly limited as long as it includes a tubular body 40 having an opening 20 (discharge port 20) and an opening 30 and an extrusion member 50, but in general, FIG. And, as illustrated in FIG. 2, it is particularly preferable to further have a female screw portion 42, a male screw portion 52, a grip portion 54, a lid member 60, and the like. That is, as shown in FIGS. 1 and 2, normally, a bolt-shaped male screw portion 52 is formed on the surface of both end faces of the extrusion member 50 on the side where the opening 30 is located, and the male screw portion 52 is formed. A substantially flat plate-shaped grip portion 54 is provided at the end opposite to the extruded member 50 of the above. Further, a female screw portion 42 screwed with the male screw portion 52 is provided at the end portion of the tubular body 40 on the opening 30 side. Further, a lid member 60 for covering the end portion of the tubular body 40 on the discharge port 20 side is provided detachably from the tubular body 40. The lid member 60 may be rotatably connected to the tubular body 40 via a hinge.

Further, in the syringe 10A of the present embodiment, at least one surface selected from the inner side surface and the outer side surface of the tubular body tip portion 44 forming the portion of the tubular body 40 near the discharge port 20 is the tubular body tip portion 44. It is divided into two or more regions along the circumferential direction C1 of the cylinder body, and the two regions adjacent to the circumferential direction C1 of the tubular body tip portion 44 are color-coded so as to be different from each other.

Here, the first region selected from two or more regions is the {(a ^* ) ² + (b ^* ) ² } ^1/2 value in the ^{L *} a ^* b ^{* color system specified in JISZ8729.} The second region selected from two or more regions having the first color tone of 3 or less and the L ^{* value of 30 or less is the L *} a ^* b ^* color tone specified in JISZ8729. It has a second color tone in which the {(a ^* ) ² + (b ^* ) ² } ^1/2 value in the system is 11 or less and the L ^* value is 90 or more.

Therefore, the first region having the first color tone reflects the dark color in the oral cavity, and it is possible to select a dental filling material having a color tone that is in harmony with the tooth of the restoration site, and ambient light (indoor light). And / or under sunlight), the second area with the second tones allows the tones of the dental filling material to be used for treatment to be accurately recognized.

In addition to this, the first region having the first color tone and the second region having the second color tone are regions that occupy a part of the surface of the tubular body tip portion 44, respectively. Therefore, since the color tone of the dental filling material can be confirmed while the dental filling material is present in the discharge port 20, the dental filling material mounting body described in Patent Document 3 can be used to confirm the color tone. It is not necessary to place the dental filling material. Therefore, even when the degree of matching between the color tone of the dental filling material and the color tone of the restoration target portion is low, the dental filling material placed on the dental filling material mounting body for checking the color tone as in the conventional case. Is never wasted. Of course, the color tone confirmation work becomes easier as compared with the case where the dental treatment is performed using only the conventional syringe for the dental filling material without using the mounting body for the dental filling material described in Patent Document 3, so that the color tone is adjusted. The time required for confirmation can be shortened, and it becomes easy to improve the degree of matching with the color tone of the repaired part. This also applies when other color tones are further assigned to the third region and the fourth region, which will be described later.

The first color tone is preferably {(a ^{* ) 2} + (b ^* ) ² } ^1/2 value is 2.5 or less, the L ^* value is preferably 25 or less, and the second color tone is {(a *). ^* ) ² + (b ^* ) ² } ^{It is preferable that the 1/2} value is 10 or less and the L ^* value is 92 or more.

When two or more regions include three regions, the third region selected from the two or more regions is the a in the L ^* a ^* b ^* color system specified in JIS Z8729. ^* ≧ 10, b ^* ≧ -20, a ^* ＞ b ^* /0.88+18.2, 90 ^{≧ L *} ≧ 40, and the L ^* a ^* b ^* table specified in JISZ8729. It has any color tone selected from the group consisting of the fourth color tone in the range of 3 <{(a ^* ) ² + (b ^* ) ² } ^1/2 <11, 90> L ^{*> 30 in the color system.} Is preferable.

When repairing the cervical region, it is necessary to select a dental filling material that has a color tone that matches the teeth of the repaired part while reflecting not only the darkness in the oral cavity but also the pink color tone of the gingiva. Become. Therefore, when the third region has a third color tone close to the color tone of the gingiva, the color tone of the dental filling material to be used when treating the portion close to the gingiva can be accurately recognized. In addition, when repairing a cavity formed in the anterior wall with a lining, that is, an anterior tooth having a cavity that does not penetrate to the lateral side of the tongue, the darkness in the oral cavity is weakened and the tooth at the restoration site is restored. It is necessary to select a dental filling material that has a color tone that is in harmony with. Therefore, when the third region has the fourth color tone, the color tone of the dental filling material having a color tone that matches the tooth of the restoration site as described above can be accurately recognized.

Further, when two or more regions include four regions, the third region selected from the two or more regions has a third color tone and is selected from the two or more regions. The region preferably has a fourth color tone. This makes it easier to check various color tones.

The third color tone is preferably a ^* ≧ 12, b ^* ≧ -18, a ^* ＞ b ^* /0.88+18.2, 85 ^{≧ L *} ≧ 45, and the fourth color tone is 4 << {. (A ^* ) ² + (b ^* ) ² } ^1/2 <10, 70> L ^* > 40 is preferable.

Here, a typical three-dimensional color system is the above-mentioned L ^* a ^* b ^* color system. The L ^* a ^* b ^* color system was standardized by the International Commission on Illumination (CIE) in 1976, and is specified by JISZ8729 in Japan. In the L ^* a ^* b ^* color system, L ^* represents lightness and is indicated by a numerical value from 0 to 100. When L ^* is large, it becomes bright, and when it becomes small, it becomes dark (L ^* = 0 is black, L ^* = 100 is white. A ^* and b ^* represent chromaticity. A ^* is a positive numerical value. turns red the larger, negative numbers become .b ^* is green the larger, it becomes yellow as a positive number, the greater the light turns green the larger the negative ^{number. {(a *) 2 +} (b * ) ² } ^{1/2 represents the saturation in the same way as C *} in the L ^* C ^* h color system, and which is in the uniform color space (the lightness surface is constant) rather than the achromatic color (saturation = 0). Indicates whether the distance is large.

The first to fourth color tones can be any color tone as long as it is within the numerical range defined by ^{the above-mentioned L *} a ^* b ^{* color tone system.} However, it is particularly preferable to use black as the first color tone, and it is particularly preferable to use white as the second color tone. Black is suitable for confirming the dental filling material in a dark environment in the oral cavity, and white is suitable for confirming the dental filling material in an environment outside the oral cavity. Further, it is particularly preferable to use pink as the third color tone. In addition, it is desirable to select a third color tone based on the color of human gingiva. Further, it is particularly preferable to use a gray color as the fourth color tone. However, the color is not limited to gray, and other color tones within the numerical range defined in ^{the above-mentioned L *} a ^* b ^{* color system can be adopted as the fourth color tone.} The fourth color tone is a color tone between the first color tone and the second color tone, and the color tone is selected in the oral cavity to confirm the dental filling material in a non-dark condition.

The first and second tones, as well as the third and fourth tones used as needed, are assigned to each region of the surface of the tubular tip 44 divided into two or more along the circumferential direction C1. Therefore, the color tone can be confirmed extremely efficiently in the state where the dental filling material is present in the discharge port 20.

The inner surface and / or outer surface of the tip portion 44 of the cylinder is divided into two or more regions along the circumferential direction C1, and each region has a first color tone, a second color tone, and if necessary, a first color tone. When assigning the three color tones and the fourth color tone, the aspect of color coding of the surface of the tubular body tip portion 44 may be any of the following first to third aspects.
(I) Only the outer surface of the tubular tip 44 is divided into two or more regions along the circumferential direction C1 of the tubular tip 44, and is adjacent to the circumferential direction C1 of the tubular tip 44. First aspect (ii) in which the color tones of the two regions are color-coded so as to be different from each other Only the inner surface of the tubular body tip 44 is divided into two or more regions along the circumferential direction C1 of the tubular tip 44. Second aspect (iii) in which the colors of the two regions adjacent to each other in the circumferential direction C1 of the tubular body tip 44 are color-coded so that the color tones are different from each other. A third aspect in which the two or more regions are divided along the circumferential direction C1 of 44, and the two regions adjacent to the circumferential direction C1 of the tubular body tip 44 are color-coded so as to be different from each other.

In particular, the color tones assigned to each region of the outer surface of the tip portion 44 of the cylinder and the color tones of the dental filling material existing in the discharge port 20 can be visually confirmed by directly comparing them, and the dental filling material can be confirmed. The first aspect and the third aspect are preferable in that the dentist who uses the above can easily recognize which color tone the confirmation work is performed on.

On the other hand, since the dental filling material is generally a translucent or milky white paste-like substance, the thinner the dental filling material, the more the color tone (background color) of the object surface behind the dental filling material. ), The color tone of the dental filling material is different and it becomes easier to recognize. For example, a syringe made of a white resin member having exactly the same shape and size and a syringe made of a black resin member are filled with the same type of dental filling material and exist in the discharge port of each syringe. When observing the dental filling material, the dental filling material filled in the white syringe is recognized as a dark and dark color tone, and the dental filling material filled in the black syringe is recognized as a light and light color tone. That is, even if the same type of dental filling material is used, if the background color is different, the dental filling material filled in the white syringe and the dental filling material filled in the black syringe are recognized as different color tones. Therefore, in the first aspect in which the inner surface of the tubular tip 44 is a monotone color consisting of any one type of color, the brightness and saturation of the dental filling material depend on the color tone of the inner surface of the tubular tip 44. It may be difficult to perform highly aesthetic dental treatment due to misunderstanding or illusion of color tone such as.

Therefore, from the viewpoint of suppressing the occurrence of the above-mentioned problems, the second aspect or the third aspect is preferable. However, in the second aspect, if the entire outer surface is a monotone color, it is difficult to determine which color tone the confirmation work is being performed. In such a case, it is preferable to provide a character display or the like corresponding to the color tone of each region divided in the circumferential direction C1 of the inner surface on the outer surface. For example, if the inner surface is divided into four regions with respect to the circumferential direction C1 and white, black, gray, and pink are assigned to each region, the outer surface is "white" and "black". , "Gray", "Pink" and the like can be provided as a color tone identification display.

In the specification of the present application, the "inner surface of the tip of the cylinder" refers to a surface in the discharge port 20 that is substantially in constant contact with the dental filling material in a state where the syringe 10 is filled with the dental filling material. means. Further, the "outer surface of the tip of the cylinder" means a surface in which the syringe 10 is filled with the dental filling material and can be directly visually recognized without substantially constantly contacting the dental filling material. That is, the "inner surface of the tip of the cylinder" means the inner peripheral side wall surface 44A in the example shown in FIG. 3, and the "outer surface of the tip of the cylinder" means the end surface 44B and the end surface 44B in the example shown in FIG. It means the outer peripheral side wall surface 44C.

When the inner side surface 44A of the tubular body tip 44 is divided into two or more regions along the circumferential direction C1 and each region is color-coded, the direction X of the inner side surface 44A is in the direction X orthogonal to the circumferential direction C1. As a whole, it may be a predetermined color tone such as a first color tone or a second color tone, or the inner side surface 44A may be a predetermined color tone such as a first color tone or a second color tone in a part of the direction X of the inner side surface 44A. However, when only a part of the direction X of the inner side surface 44A is set to a predetermined color tone such as a first color tone or a second color tone, it is preferable that the portion as close to the discharge port 20 as possible is set to a predetermined color tone. This point is the same for the outer surfaces 44B and 44C. Further, the area width of the inner side surface 44A and the outer side surfaces 44B and 44C with respect to the pair in the direction X orthogonal to the circumferential direction C1 is not particularly limited, but generally, in a region of about 2 mm to 15 mm from the discharge port 20 side. It suffices, preferably a region of about 3 mm to 10 mm. The diameter of the discharge port 20 in the syringe 10 of the present embodiment is not particularly limited, but is generally about 3 mm to 10 mm.

4 to 8 are development plan views showing an example of coloring on the inner side surface 44A and the outer side surfaces 44B and 44C of the tubular body tip portion 44 of the syringe 10A of the present embodiment, and are specifically shown in FIG. The state in which the inner side surface 44A and the outer side surfaces 44B and 44C of the tubular body tip portion 44 are deployed with respect to the circumferential direction C1 is shown. Here, FIGS. 4 (A) to 8 (A) are development plan views showing the coloring on the inner side surface 44A, and FIGS. 4 (B) to 8 (B) are the colors on the outer surfaces 44B and 44C. It is a developed plan view which shows the ring, and the upper end side of each figure means the discharge port 20 side. Further, the angles shown at the upper end and the lower end of each figure indicate the positions in the circumferential direction C1 when a certain position in the circumferential direction C1 is used as a reference (0 °), and 0 ° and 360 ° are in the circumferential direction C1. Means the same position.

Further, in FIGS. 4 to 8, the region indicated by the Roman numeral "I" means the region having the first color tone, and the region indicated by "II" means the region having the second color tone, and "III". The region represented by "" means a region having a third color tone, and the region represented by "IV" means a region having a fourth color tone. This point is the same in FIG. 11 which will be described later.

In the example shown in FIG. 4, the inner side surface 44A is divided into two regions with respect to the circumferential direction C1, and in the figure, the left region has the first color tone and the right region has the second color tone. Have. Further, the entire surface of the outer surfaces 44B and 44C is a monotone color such as white or black. However, of the outer surfaces 44B and 44C, the character "B" is displayed on the outer peripheral side wall surface 44C as the color tone identification display 70 corresponding to the region having the first color tone of the inner side surface 44A, and the second of the inner surface 44A. The character "W" is displayed as the color tone identification display 70 corresponding to the region having two color tones.

In the example shown in FIG. 5, the outer surfaces 44B and 44C are equally divided into two regions with respect to the circumferential direction C1, and in the figure, the left region has the first color tone and the right region is the second region. It has a color tone. Further, the entire surface of the inner side surface 44A is a monotone color such as white or black.

In the example shown in FIG. 6, the inner side surface 44A and the outer side surfaces 44B and 44C are divided into two regions with respect to the circumferential direction C1, and the region on the left side in the drawing has the first color tone and the region on the right side has the first color tone. The area has a second color tone.

In the example shown in FIG. 7, the inner side surface 44A and the outer side surfaces 44B and 44C are divided into three equal regions with respect to the circumferential direction C1, and the left region in the figure has the first color tone and is in the center. The area has a second color tone and the area on the right side has a third color tone. However, of the outer side surfaces 44B and 44C, regarding the outer peripheral side wall surface 44C, only the region of the outer peripheral side wall surface 44C near the discharge port 20 side is divided into three regions and color-coded, and the other regions are color-coded. It is a monotone color such as white or black.

In the example shown in FIG. 8, the end surface 44B of the inner surface 44A and the outer surfaces 44B and 44C is divided into four regions with respect to the circumferential direction C1. A region having a color tone, a region having a second color tone, a region having a third color tone, and a region having a fourth color tone are provided in this order. Further, among the outer surfaces 44B and 44C, the outer peripheral side wall surface 44C whose entire surface is a monotone color such as white or black has a color tone identification display corresponding to the region having the first color tone on the inner surface 44A and the end surface 44B. The letter "B" is displayed as 70, and the letter "W" is displayed as the color tone identification display 70 corresponding to the area having the second color tone, and the color tone identification display 70 corresponding to the area having the third color tone is displayed. The letter "P" is displayed, and the letter "G" is displayed as the color tone identification display 70 corresponding to the region having the fourth color tone.

The dental filling material to be filled in the syringe 10 of the present embodiment is not particularly limited as long as it is a paste-like substance used for dental treatment, and a known dental filling material such as a dental composite resin or cement can be used. .. The dental filling material is a composition containing at least a polymerizable monomer and a polymerization initiator, and further appropriately containing a filler, a solvent, and the like, if necessary. Further, the dental filling material is composed of a dental filling material composed of a chemically polymerizable composition containing at least a polymerizable monomer and a chemical polymerization initiator, and a photopolymerizable composition containing at least a polymerizable monomer and a photopolymerization initiator. It may be any of the dental filling materials. In the case of a dental filling material made of a photopolymerizable composition, after discharging from the discharge port 20 of the syringe 10, the polymerizable monomer contained in the dental filling material starts to be polymerized and cured by ambient light. It ends up. Therefore, when the color tone is confirmed using the dental filling material mounting body described in Patent Document 3, if it takes time to confirm the color tone, the dental filling material is arranged on the portion to be repaired to obtain a desired shape. The time required to prepare may be shortened. However, when the syringe 10 of the present embodiment is used, the color tone can be confirmed in the state where the dental filling material is present in the discharge port 20 which can minimize the exposure to the ambient light, so that the above-mentioned problem is greatly solved. Can be suppressed.

In the syringe 10 of the present embodiment, the tubular body tip 44 may be removable. FIG. 9 is a side view showing another example of the syringe of the present embodiment. The syringe 10B (10) shown in FIG. 9 has a structure in which the tubular body tip portion 44 of the syringe 10A shown in FIGS. 1 and 2 is removable from the main portion of the syringe 10A. In the syringe 10B shown in FIG. 9, the cylinder body 40 has an opening 32 and 30 at both ends, respectively, at one end of the cylinder body portion 46B and the cylinder body portion 46B (the end on the side where the opening 32 is provided). It is a syringe substantially similar to the syringe 10A shown in FIGS. 1 and 2, except that it is a member having a detachably attached tubular body tip portion 46T.

Here, the tubular body tip portion 46T also has an opening 22 communicating with the discharge port 20 at the end opposite to the end on the side where the discharge port 20 is provided. Then, in the example shown in FIG. 9, the tubular body tip 46T is attached to the tubular body 46B by inserting or screwing the end on the side where the opening 22 is provided into the opening 32 of the tubular body 46B. You can do it. Therefore, the outer diameter of the tubular body tip portion 46T on the side provided with the opening 22 is set to substantially match the inner diameter of the tubular body main body portion 46B on the side provided with the opening 32. The inner diameter of the tubular body tip portion 46T on the side provided with the opening 22 may be set to substantially match the outer diameter of the tubular body main body portion 46B on the side provided with the opening 32. Further, in the cylinder 10B, the extrusion member 50 (not shown in FIG. 9) may be slidably arranged along the axial direction A1 of the cylinder body portion 46B at least in the cylinder body portion 46B. ..

A method in which the inner side surfaces 44A and / or the outer side surfaces 44B and 44C of the tubular body tip portions 44 and 46T are divided into two or more regions with respect to the circumferential direction C1 and color-coded so that the color tone of each region is different. Is not particularly limited, but for example, (a) a method of molding the entire cylinder 40 including the cylinder tip 44, 46T and the cylinder tip 44 using two or more kinds of resin materials having different color tones, (b). ) A method of coating the inner side surfaces 44A and / or outer surfaces 44B, 44C of the monotone colored cylinder tips 44, 46T with two or more different color paints, or (c) the monotone colored cylinder tip 44. , A method of adhering two or more kinds of films having different color tones to the inner side surfaces 44A and / or the outer side surfaces 44B and 44C of the 46T.

Further, the discharge port of a conventional syringe having the same structure as the syringe 10A of the present embodiment illustrated in FIGS. 1 and 2 except that the inner side surface and the outer side surface of the tip portion of the cylinder are made of monotone color. On the other hand, one surface selected from the inner surface and the outer surface is divided into two or more regions with respect to the circumferential direction, and each region is divided into the tubular tip portion 44 of the syringe 10 of the present embodiment. A color-coded ring-shaped cap may be attached in the same manner as the 46T. By using this ring-shaped cap, even if the conventional syringe has a monotone color on the inner and outer surfaces of the tip of the cylinder, the color tone of the dental filling material can be easily confirmed as in the syringe 10 of the present embodiment. be able to.

10A and 10B are schematic schematic views showing an example of the ring-shaped cap of the first embodiment, FIG. 10A shows a side view of the ring-shaped cap, and FIG. 10B shows FIG. 10 (B). FIG. 5 is a cross-sectional view showing an example of a cross-sectional structure in a state where the ring-shaped cap shown in A) is attached to the discharge port of a conventional syringe. The ring-shaped cap 100 shown in FIG. 10 has openings 102 and 104 at both ends, and the end surface 106D on the opening 104 side has an opening 102 side from the end surface 106D along the axial direction A2 of the ring-shaped cap 100. A mounting groove 108 extending to the end face 106B side of the is provided. Further, the inner side surface (inner peripheral side wall surface) 106A of the ring-shaped cap 100 is a surface having the same function and role as the inner side surface 44A of the tubular body tip portions 44 and 46T constituting the syringe 10 of the present embodiment. The outer side surface (end surface 106B, outer peripheral side wall surface 106C) is a surface having the same function and role as the outer surfaces 44B and 44C of the tubular body tip portions 44 and 46T constituting the syringe 10 of the present embodiment. The inner side surfaces 106A and / or the outer side surfaces 106B and 106C are divided into two or more regions along the circumferential direction C2 in the same manner as in the cases illustrated in FIGS. It can be color-coded by color tone.

Further, the tubular tip portion 144 of the conventional syringe shown in FIG. 10 has the same structure as the tubular tip portion 44 constituting the syringe 10A of the present embodiment, and has an inner peripheral side wall surface 144A, an end surface 144B, and an end surface 144B. The outer peripheral side wall surface 144C corresponds to the inner peripheral side wall surface 44A, the end surface 44B, and the outer peripheral side wall surface 44C of the tubular body tip portion 44, respectively. However, in the tubular body tip portion 144, the entire inner peripheral side wall surface 144A, the end surface 144B, and the outer peripheral side wall surface 144C are made of monotone colors such as white and black.

When the ring-shaped cap 100 is used, the ring-shaped cap 100 is opened from the opening 104 side with the axial direction A2 of the ring-shaped cap 100 and the axial direction A3 of the tubular body tip 144 aligned with each other, and a conventional syringe is used. By inserting it into the discharge port 120 of the tubular body tip portion 144, the tubular body tip portion 144 and the mounting groove 108 of the ring-shaped cap 100 are fitted. As a result, the ring-shaped cap 100 can be attached to the tip portion 144 of the tubular body.

In a conventional syringe, the entire inner and outer surfaces of the tip of the cylinder forming a portion near the discharge port are generally white or black. Therefore, as a syringe, the entire inner and outer surfaces of the tip of the cylinder forming the portion near the discharge port are covered with {(a ^* ) ² + (in the ^{L *} a ^* b ^{* color tone system specified in JISZ8729.} b ^* ) ² } ^{The first color tone with a 1/2} value of 3 or less and an L ^* value of 30 or less, and {(a ^* ) ^{2 in the L *} a ^* b ^{* color system specified by JISZ8729.} When using a syringe having any color tone selected from the group consisting of + (b ^* ) ² } ^1/2 value of 11 or less and L ^{* value of 90 or more, the following} It is also preferable to use the ring-shaped cap of the second embodiment described.

That is, in the ring-shaped cap of the second embodiment, when the ring-shaped cap is divided into two or more regions along the circumferential direction, the first region selected from the two or more regions is a transparent member. Of the second region selected from two or more regions, the inside of the ring-shaped cap is composed of a gap portion formed by excluding the member occupying the first region of the ring-shaped cap or the ring-shaped cap. At least one surface selected from the side surface and the outer surface has a color tone different from the color tone selected as the color tone of the entire inner surface and outer surface of the tip portion of the cylinder among the first color tone and the second color tone. In the ring-shaped cap of the second embodiment, the color tone of the first region is the color tone of the cylindrical tip of the syringe to which the ring-shaped cap is attached. Then, as the color tone of the second region, a color different from the color tone of the first region is selected. For example, if the cylindrical tip of the syringe has a first shade, the second region has a second shade. The ring-shaped cap in which the first region is a gap portion is manufactured by cutting a part of the ring-shaped member or bending the linear member in an arc shape with a constant gap at both ends. can do.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to the following examples.

When the color tone is confirmed using the syringe 10A of the present embodiment filled with the dental filling material, the conventional syringe filled with the dental filling material, and the dental filling material mounting body (kneaded paper) described in Patent Document 3 The amount of dental filling material used for color tone confirmation and the time required for color tone confirmation were evaluated for the case where the color tone was confirmed using. The details of the evaluation method and the evaluation result will be described below.

1. 1. Syringe and Japanese paper Tables 1 and 2 show details of the syringe and Japanese paper used to confirm the color tone of the dental filling material in each Example and Comparative Example. The syringes used in each Example and Comparative Example are syringes 10A having the structures shown in FIGS. 1 and 2, and only the color-coded forms of the inner side surface 44A and / or the outer side surfaces 44B and 44C of the tubular body tip portion 44. Are different as shown in Table 1. Here, as for the color-coded form of the tubular body tip portion 44, the color-coded form shown in FIG. 4 was adopted in Example 1, and the outer surfaces 44B and 44C were white. In Example 2, the color-coded form shown in FIG. 5 was adopted, and the inner side surface 44A was white. In Examples 3 to 5, both the inner side surface 44A and the outer side surfaces 44B and 44C were color-coded with the color tones shown in Table 1. Further, the syringes used in Comparative Example 1 and Comparative Example 2 have the same structure as the syringe 10A shown in FIGS. 1 and 2 except that the entire inner and outer surfaces of the tip of the cylinder are white. Is a syringe with. Further, in the kneaded washi used in Comparative Example 2, as shown in FIG. 11, a circular color tone confirmation area 210 is provided on the placement surface side of the dental filling material of the kneading paper 200, and this color tone confirmation area 210 is provided. The 210 is divided into two equal parts, a region having a semicircular first color tone and a region having a semicircular second color tone adjacent to the region having the first color tone.

It should be noted that the color tone of the inner side surface 44A and / or the outer side surface 44B and 44C of the tubular body tip portion 44 of the syringe 10A used in each embodiment and the color tone of the color tone confirmation area 210 of the kneaded Japanese paper 200 are L ^* a ^* b ^* color system. The color tone indicated by is measured using a color difference meter (TC-1800mkII, manufactured by Tokyo Denshoku).

2. Dental filling material As the dental filling material to be filled in the syringe 10A used in each example and the syringe used in Comparative Examples 1 and 2, Esterite Σ Quick (manufactured by Tokuyama Dental, color tone: A2, A3, A3.5) was used. Using. Then, for each Example and each Comparative Example, one syringe each filled with each dental filling material having color tones A2, A3 and A3.5 was prepared, for a total of three syringes. Esterite Σ Quick is a composite resin having an operation margin time of about 90 seconds under an ambient light of 10000 lux.

3. 3. Color tone confirmation evaluation Resin tooth samples in which the following three types of cavities were formed using resin teeth (real crown anterior teeth (C5, color tone: A3) and endura posterio (premolars, M30, color tone: A3), made by Matsukaze). Was produced.
(A) Lower left No. 6 distal second-class tooth cavity (b) Upper left No. 2 gingival-close to fifth-class cavity (c) Upper right No. 1 lined third-class tooth cavity

Next, after arranging the resin tooth sample on the jaw model, this jaw model was attached to a model for basic education training (Phantom DST, manufactured by Morita Seisakusho) that can reproduce the oral cavity in a simulated manner.

Subsequently, for each Example and Comparative Example 1, three syringes and jaw models filled with dental filling materials having different colors were provided to the subject, and for Comparative Example 2, dentistry having different colors. Three syringes filled with filling material, kneaded paper and a jaw model were donated to the subject, and after the subject selected one syringe that best matched the tooth cavity of the resin tooth arranged in the jaw model, this A color tone confirmation test was performed in which the dental cavity was filled with the dental filling material using a syringe. This color tone confirmation test was performed by 10 subjects for each example and comparative example. The illuminance of the ambient light in the room where the color tone was confirmed was about 10,000 lux.

Further, in the color tone confirmation test, in each Example and Comparative Example 1, the subject used only the syringe 10A filled with the dental filling material, and the dental filling material and the tooth cavity and the cavity without discharging the dental filling material from the syringe 10A. The color tone was confirmed by checking whether the color tone was the same as that of the vicinity. On the other hand, in Comparative Example 2, the subject discharged the dental filling material onto the kneaded paper from a conventional syringe filled with the dental filling material, and then the color tone of the dental filling material on the kneaded paper and the tooth cavity and its vicinity. The color tone was confirmed depending on whether or not they match.

Here, if the dental filling material filled in the syringe selected by the subject had a color tone most suitable for the repair of the tooth cavity, it was determined to be a color tone match, and in other cases, it was determined to be a color tone mismatch. .. In addition, the time from the start of the color tone confirmation work by the subject to the end (that is, the time until the subject confirms the color tone and selects the syringe) is measured, and the color tone is confirmed from the operation margin time (90 seconds). The value obtained by subtracting the time required for the operation was calculated as the remaining operation margin time. Further, in the color tone confirmation test in Comparative Example 2, the amount of the dental filling material used by each subject on the kneaded washi was measured at the time of color tone confirmation.

The results of the color tone match / mismatch judgment, the time required for color tone confirmation, the remaining operation margin time, and the amount of dental filling material used for color tone confirmation were determined in each Example and Comparative Example for the dental tone confirmation test. Tables 3 and 4 show the types of cavities and their vicinity that contrast the filling material and color tone.

Here, in Tables 3 and 4, regarding the judgment results of color tone match / mismatch, the results of totaling the number of subjects judged to be color tone match and the number of subjects judged to be color tone mismatch are shown. .. In addition, the average value of the values of each subject was shown for the time required for color tone confirmation and the remaining operation margin time. Further, in the color tone confirmation test in Comparative Example 2, the average value of the amount of the dental filling material used by each subject on the kneaded washi paper was shown at the time of color tone confirmation.

From the results shown in Table 3, by using a syringe whose outer surface or inner surface is color-coded, the time required for color tone confirmation is longer than that of a syringe in which both the outer surface and the inner surface are white without color coding. The result was that it could be shortened and the number of color matching was high. Above all, it was found that when a syringe whose inner surface was color-coded was used, the time required for color tone confirmation could be further shortened, and the number of color tone matches could be increased. From the above, the effect of color-coding the tip of the syringe was confirmed. In particular, it was confirmed that the color coding of the inner surface that is in direct contact with the filled dental filling material is very effective.

Further, from the results shown in Table 4, by using the syringe of the present invention, it is possible to select a color tone that matches the repair target portion without discharging the dental filling material filled in the syringe. Therefore, dental filling can be performed. It was possible to suppress the generation of waste of materials. In particular, by color-coding at least the inner surface of the tip portion of the syringe, in addition to the above effects, the time required for confirming the color tone with each tooth cavity could be made shorter than the time required when using Japanese paper. Furthermore, among them, by using a syringe in which both the inner and outer surfaces are color-coded, the operation time can be further shortened. That is, when the syringe of the present invention was used, the conventional color tone confirmation work could be performed very efficiently.

10, 10A, 10B: Syringe 20: Opening (discharge port)
22, 30, 32: Opening 40: Cylinder 42: Female threaded portion 44: Cylinder tip 44A: Inner peripheral side wall surface (inner side surface)
44B: End face (part of outer face)
44C: Outer peripheral side wall surface (part of the outer surface)
46B: Cylindrical body 46T: Cylindrical tip 50: Extruded member 52: Male screw portion 54: Grip portion 60: Cover member 70: Color tone identification display 100: Ring-shaped cap 102, 104: Opening 106A: Inner peripheral side wall surface (Inner surface)
106B: End face (part of outer face)
106C: Outer peripheral side wall surface (part of outer surface)
106D: End face 108: Mounting groove 120: Discharge port 144: Cylinder tip 144A: Inner peripheral side wall surface 144B: End face 144C: Outer peripheral side wall surface 200: Kneaded Japanese paper 210: Color tone confirmation area

Claims (10)

A cylinder having openings at both ends and the opening at one end forming a discharge port,
The inside of the cylinder is provided with at least an extruded member slidably arranged along the axial direction of the cylinder.
At least one surface selected from the inner surface and the outer surface of the tip portion of the cylinder forming the portion of the cylinder near the discharge port is formed in two or more regions along the circumferential direction of the tip portion of the cylinder. When the two regions are divided and the two regions adjacent to each other in the circumferential direction of the tip of the cylinder are color-coded so as to be different from each other.
The first region selected from the two or more regions has a {(a ^* ) ² + (b ^* ) ² } ^1/2 value in the ^{L *} a ^* b ^{* color tone system specified in JISZ8729.} It has the first color tone of 30 or less and L ^{* value of 30 or less.}
The second region selected from the two or more regions has a {(a ^* ) ² + (b ^* ) ² } ^1/2 value in the ^{L *} a ^* b ^{* color system specified in JISZ8729 of 11.} A syringe for dental filling material, which is characterized by having a second color tone having an L ^{* value of 90 or more.} At least the inner surface of the tip of the cylinder is divided into two or more regions along the circumferential direction of the tip of the cylinder, and two regions adjacent to the tip of the cylinder in the circumferential direction. The syringe for dental filling material according to claim 1, wherein the color tones are color-coded so as to be different from each other. The inner and outer surfaces of the tip of the cylinder are divided into two or more regions along the circumferential direction of the tip of the cylinder, and two adjacent regions of the tip of the cylinder are adjacent to each other. The syringe for dental filling material according to claim 1 or 2, wherein the color tones of the regions are color-coded so as to be different from each other. The two or more regions include three regions.
The third region selected from the two or more regions is L ^* a ^* b ^* in the JISZ8729 color system a ^* ≧ 10, b ^* ≧ -20, a ^* ＞ b ^* / 0. 3 <{(a ^* ) ² + (b ^* ) ² } in the third color tone in the range of 88 + 18.2, 90 ≧ L ^{* ≧ 40, and L *} a ^* b ^{* color system standardized by JISZ8729. The fourth color tone in the range of 1/2} <11, 90> L ^* > 30, according to any one of claims 1 to 3, which has any color tone selected from the group consisting of. Syringe for dental filling materials. The two or more regions include four regions.
The third region selected from the two or more regions is L ^* a ^* b ^* in the JISZ8729 color system a ^* ≧ 10, b ^* ≧ -20, a ^* ＞ b ^* / 0. It has a third color tone in the range of 88 + 18.2, 90 ≧ L ^* ≧ 40, and has a third color tone.
The fourth region selected from the two or more regions is 3 <{(a ^* ) ² + (b ^* ) ² } ^1/2 <in the ^{L *} a ^* b ^{* color system specified in JIS Z8729.} The syringe for dental filling material according to any one of claims 1 to 3, which has a fourth color tone in the range of 11, 90> L ^{*> 30.} Claim 1 is characterized in that the tubular body includes a tubular body main body portion having openings at both ends and a tubular body tip portion detachably attached to one end of the tubular body main body portion. 5. The syringe for dental filling material according to any one of 5. The syringe for a dental filling material according to any one of claims 1 to 6, wherein the dental filling material to be filled in the cylinder is a dental filling material made of a photopolymerizable composition. The main body of the cylinder, which has openings at both ends,
Detachable attachment to one end of the body of the cylinder, each having openings at both ends, and the tip of the cylinder whose opening at one end forms a discharge port.
The tip of the cylinder constituting the syringe for dental filling material, which comprises at least an extruded member slidably arranged along the axial direction of the cylinder body in the cylinder body.
At least one surface selected from the inner surface and the outer surface of the tip of the cylinder is divided into two or more regions along the circumferential direction of the tip of the cylinder, and the circumference of the tip of the cylinder is peripheral. When the colors of two regions adjacent to each other are color-coded so as to be different from each other.
The first region selected from the two or more regions has a {(a ^* ) ² + (b ^* ) ² } ^1/2 value in the ^{L *} a ^* b ^{* color tone system specified in JISZ8729.} It has the first color tone of 30 or less and L ^{* value of 30 or less.}
The second region selected from the two or more regions has a {(a ^* ) ² + (b ^* ) ² } ^1/2 value in the ^{L *} a ^* b ^{* color system specified in JISZ8729 of 11.} The tip of the cylinder of a syringe for dental filling material, which is described below and has a second color tone having an L ^{* value of 90 or more.} A cylinder having openings at both ends and the opening at one end forming a discharge port,
A ring-shaped cap attached to the discharge port of a syringe for dental filling material including at least an extrusion member slidably arranged along the axial direction of the cylinder.
At least one surface selected from the inner surface and the outer surface of the ring-shaped cap is divided into two or more regions along the circumferential direction of the ring-shaped cap, and with respect to the circumferential direction of the ring-shaped cap. When the color tones of two adjacent areas are color-coded so as to be different from each other,
The first region selected from the two or more regions has a {(a ^* ) ² + (b ^* ) ² } ^1/2 value in the ^{L *} a ^* b ^{* color tone system specified in JISZ8729.} It has the first color tone of 30 or less and L ^{* value of 30 or less.}
The second region selected from the two or more regions has a {(a ^* ) ² + (b ^* ) ² } ^1/2 value in the ^{L *} a ^* b ^{* color system specified in JISZ8729 of 11.} A ring-shaped cap of a syringe for a dental filling material, which has a second color tone having an L ^{* value of 90 or more.} A cylinder having openings at both ends and the opening at one end forming a discharge port,
The inside of the cylinder is provided with at least an extruded member slidably arranged along the axial direction of the cylinder.
The entire inner and outer surfaces of the tip of the cylinder forming the portion near the discharge port are the {(a ^* ) ² + (b ^* ) ^{2 in the L *} a ^* b ^{* color tone system specified by JISZ8729.} } ^{The first color tone with a 1/2} value of 3 or less and an L ^* value of 30 or less, and {(a ^* ) ² + (b ^{* ) in the L *} a ^* b ^{* color system specified by JISZ8729.} ) ² } A ring attached to the discharge port of a dental filling material syringe having any color tone selected from the group consisting of a second color tone having a ^1/2 value of 11 or less and an L ^{* value of 90 or more.} It ’s a shape cap,
When the ring-shaped cap is divided into two or more regions along the circumferential direction, the first region selected from the two or more regions is composed of a transparent member, or the ring-shaped cap is formed. It consists of a gap part formed by excluding the member occupying the first region of
Of the second region selected from the two or more regions, at least one surface selected from the inner surface and the outer surface of the ring-shaped cap is the cylinder of the first color tone and the second color tone. A ring-shaped cap of a syringe for dental filling material, which has a color tone different from the color tone selected as the color tone of the entire inner surface and outer surface of the tip of the body.

Images