JPH0134751B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD OF THE INVENTION The present invention relates to a metal dental abrasive strip used primarily by dentists to abrade interproximal tooth fillings of patients. Conventional dental abrasive strips can be divided into metal dental abrasive strips and synthetic resin dental abrasive strips depending on the substrate material. Depending on the size and shape of the surface filler, the polishing abrasive grains may fall off, the polishing abrasive grain fixing layer may be deformed, or the substrate may be deformed. In addition, after polishing the interproximal filling, the used dental polishing strip must be cleaned and sterilized in order to be used again. After putting it in an ultrasonic cleaner for 10 to 20 seconds to completely remove the cutting waste contaminants that adhered between the abrasive grains, use a dry heat sterilizer for further sterilization at 180°C. It was heated at ℃ for 1 hour. However, such cleaning and sterilization processes can cause discoloration and deformation of the substrate in conventional dental abrasive strips, as well as deformation of the abrasive grain adhesion layer, making it difficult for teeth to be reused. There were cases in which the polishing ability and operability of the adjacent surface filler deteriorated. Furthermore, conventional dental abrasive strips often have abrasive grains of one type, which poses operational problems. That is, when a dentist polishes a patient's interproximal tooth filling, he first performs a rough polishing operation using a dental polishing strip to which rough polishing abrasive grains with excellent polishing effects are fixed, and then performs rough polishing. Select a dental polishing strip to which fine abrasive grains are fixed, and perform a finishing polishing operation to make the surface of the tooth-proximal filling smooth by correcting and polishing it according to the surface condition of the tooth-proximal filling. There is. To do this, first, a dental polishing strip to which coarse abrasive grains are fixed is removed from a designated storage location and placed in the patient's mouth for rough polishing.
The dental abrasive strip to which the coarse abrasive grains are fixed is removed from the oral cavity and returned to the designated storage location, and then the dental abrasive strip to which the fine abrasive grains are secured is stored in the designated storage location. Since the final polishing work is completed by removing the tooth from the area and performing the same operation, this procedure must be repeated at least several times for each area to be polished, which is troublesome for the dentist and the patient. . Based on the above, the performance of dental polishing strips used when polishing tooth-proximal fillings is as follows: (1) During polishing of tooth-proximal fillings, polishing abrasive grains may fall off, polishing abrasive grains may There is no risk of deformation of the fixed layer, deformation or discoloration of the substrate, etc. (2) After polishing the tooth proximal filling, in order to clean and sterilize the cutting contaminants that adhered between the polishing abrasive grains, use an ultrasonic cleaner, immerse it in a cleaning solution, or dry it. During heating in a heat sterilizer, there is no risk of discoloration, deformation, or falling off of the substrate and abrasive grain adhesion layer. (3) Once a single dental polishing strip is taken out of storage, it is possible to complete the rough polishing work to the final polishing work in one operation without having to put it back. It is desirable to satisfy the following three factors. For this purpose, it is necessary to fix two types of polishing abrasive grains with different particle sizes on one metal substrate, but in the conventional metal substrate, coarse polishing abrasive grains and fine polishing abrasive grains are Separating the abrasive grains into left and right parts and fixing them on the same surface or on different surfaces is simply one method.
Unlike the method of bonding different types of polishing abrasive grains on the same surface, this method was technically difficult. As a result of our earnest efforts to create a metal dental abrasive strip that satisfies all of the conditions (1) to (3) above, the inventors of the present invention have discovered that a particle-shaped polishing strip can be formed on a metal substrate, particularly a stainless steel substrate. The present invention was completed using a method in which two types of polishing abrasive grains with different values are divided into left and right sides and fixed to the same surface or to each surface by a brazing method. That is, the present invention relates to a metal dental abrasive strip, in which abrasive grains of 40 to 150 μm as coarse abrasive grains and 7 to 30 μm as fine abrasive grains are deposited on a metal, particularly stainless steel, substrate. Metal dental polishing strips are made by brazing and fixed on the same side or on different sides on the left and right sides, and the polishing process is used as a rough polishing process when a dentist polishes a patient's interproximal tooth filling. This makes it possible to easily and reliably perform everything from preparation to finishing in a single loading operation, and at the same time, it is mechanically and chemically stable for post-polishing cleaning and sterilization of interproximal fillings. It has been successfully made into a reality. That is, conventionally, in the polishing work of interproximal tooth fillings, dental polishing strips having coarse polishing abrasive grains fixed thereon to dental polishing strips having fine polishing grains fixed thereon are sequentially used, as described above. However, by using the metal dental polishing strip according to the present invention, it is possible to complete the process from rough polishing to final polishing of tooth interproximal fillings in one operation. , Polishing abrasive grains fell off during cleaning with an ultrasonic cleaner, etc. after polishing the tooth proximal filling, immersed in a cleaning solution, or heated in a dry heat sterilizer. While deformation or falling off of the adhesive layer or deformation or discoloration of the substrate has occurred, the use of the metal dental abrasive strip according to the present invention minimizes such risks and saves time and money for dentists and patients. By reducing the operational burden and being highly resistant to mechanical and chemical treatments, it makes a great contribution to the hygiene of dentists and patients, and its effects are remarkable. The details of the metal dental polishing strip according to the present invention are as follows. The core of the present invention is that two types of polishing abrasive grains with different particle sizes are fixed to the same surface or different surfaces of a metal substrate in a manner that leaves a non-abrasive portion in the middle between the left and right sides. If you use a metal dental abrasive strip in which coarse abrasive grains and fine abrasive grains are bonded together, you can first apply the coarse abrasive grains when polishing the tooth proximal filling. The general purpose can be achieved by performing rough polishing on the abrasive grain surface to which it is fixed, but next, in order to make corrections and finish polishing to make this surface even smoother, use the same metal. The abrasive grain surface of the dental abrasive strip to which coarse abrasive grains are fixed can be moved toward the abrasive grain surface to which fine abrasive grains are fixed. In addition, if the oral cavity is small, such as in children, when a metal dental abrasive strip with abrasive grains fixed on the left and right sides on the same side is moved, one end of the metal plate inserted into the oral cavity may If there is a possibility of damaging the oral cavity or making it difficult for the dentist to operate, instead of using this, use a metal dental polishing strip with abrasive grains fixed to different sides on the left and right sides. Use the same metal dental abrasive strip by rotating it toward the abrasive surface to which fine abrasive grains are fixed, which is opposite to the abrasive grain surface to which coarse abrasive grains are fixed. A significant feature is that by doing so, it is possible to operate with the same metal dental abrasive strip without having to replace the metal dental abrasive strip with another dental abrasive strip. In this case, as already mentioned, the metal dental abrasive strip of the present invention exhibits superior abrasive performance and durability compared to conventional dental abrasive strips. is usually
There are no particular restrictions on the type of metal as long as it has adequate corrosion resistance against cleaning fluids used in dental clinics. In other words, copper alloys (brass) and nickel alloys can be used if an appropriate bonding method is used. , aluminum-based alloys, iron-based alloys, stainless steel-based alloys, etc. can be used, but iron-based,
Stainless steel is particularly desirable. The use of metal dental abrasive strips is typically for abrasive materials filled on the lateral or proximal surfaces of teeth. Therefore, if there are adjacent teeth, the abrasive grains of the metal dental polishing strip are inserted between the teeth and pressed against the opposing tooth surface for polishing, but in order to avoid damaging the adjacent tooth surfaces, the abrasive grains of the metal dental polishing strip are placed on the metal substrate. It is fixed to either the front or back side, the left side of the front side and the right side of the back side, or the right side of the front side and the left side of the back side. The width of the metal dental polishing strip was limited to a range of 2 mm to 5 mm depending on the length of the crown of a child's, adult's front, or white tooth. In addition, the length of the fixed surface on which each polishing abrasive grain is fixed is 40 to 60 mm, judging from the operation surface where the polishing operation is performed by inserting it into the interdental area and making reciprocating movement.
Limited to lengths of mm. Furthermore, the thickness of the metal substrate needs to have appropriate strength, but if it is too thick, it will be difficult to insert it into the interdental area, so the thickness was limited to 0.5 mm or less. The metal dental abrasive strip according to the present invention has two types of abrasive grains with different particle sizes fixed to the same metal substrate. In some cases, a non-abrasive abrasive grain part is left with a length of 1 to 15 mm between the fixed parts of two types of abrasive grains with different roughness, where the abrasive grains are not fixed. . In other words, depending on the size of the abrasive grains and the thickness of the adhesive layer, it is usually easier to insert the metal substrate between the teeth if it is as thin as possible. It is used by inserting it between the teeth from the abrasive part. The pressure applied during insertion varies depending on the state of the contact points between the teeth. If the insertion point is small, the length of the non-abrasive abrasive grain part can be inserted even if it is 1 mm, so the minimum length should be 1 mm, and the width between adjacent teeth is large, and when inserting it, it can be inserted gradually by making some reciprocating movement. Since it is preferable that the length of the abrasive grain part for non-polishing be long, the upper limit was set at 15 mm taking into account ease of operation. As mentioned above, the metal dental polishing strip according to the present invention is capable of completing the process from rough polishing to final polishing of tooth proximal fillings in one operation. The selection of coarse polishing abrasive grains is important, with grain sizes of 40 to 150 μm
Following this, fine polishing abrasive grains with a particle size of 7 to 30 μm are used.
It was confirmed that the combination of In other words, if coarse polishing abrasive grains with a particle size exceeding 150 μm are used, the polishing effect is excellent, but the polished surface is significantly damaged, resulting in large scars that can be difficult to carry out in subsequent finish polishing operations. This makes removal and correction work difficult, and the finished surface becomes very poor. Also particle size 40μ
If polishing abrasive grains with a size smaller than m are used, the polishing effect will be extremely reduced and the polishing operation will take a long time. Although finer abrasive grains are ideal for fine polishing, actual operability is related to the polishing effect achieved in combination with coarse polishing abrasive grains. Therefore, if polishing abrasive grains with a particle size of 40 to 150 μm are used as coarse polishing abrasive grains, polishing abrasive grains with a particle size of 7 to 30 μm are considered to be optimal as fine polishing abrasive grains. In other words, if abrasive grains with a particle size exceeding 30 μm are used as fine polishing abrasive grains, the surface will become slightly rough to become the final polished surface, which will be insufficient for the purpose of final polishing work, and the grain size will be If abrasive grains with a diameter of less than 7 μm are used, the polishing efficiency will decrease considerably, and the polishing time will become longer.
It also becomes difficult to control the thickness of the polishing abrasive grain fixing layer. As mentioned above, the purpose of use of the metal dental polishing strip according to the present invention is to polish the tooth-proximal filling, and the abrasive grains to which it is fixed have a Knoop hardness of 30 to 30.
It is not particularly limited as long as it has the hardness necessary to polish a tooth proximal filling with a Knoop hardness of 150 or tooth enamel with a Knoop hardness of around 340. i.e. Mohs hardness 7
As for the above hard particles, hard materials such as carborundum, alundum, diamond, carbide, and nitride, which are usually easily available, are suitable. The metal dental polishing strip according to the present invention will be explained below. FIG. 1 is a front sectional view of an example of a cut surface of a metal dental abrasive strip according to the present invention, FIG. 2 is a plan view of the same, and FIG. Front sectional view, Figure 4 is the same plan view,
FIG. 5 shows a metal dental abrasive strip according to the present invention after cutting, in which coarse abrasive grains are firmly fixed to the front surface of a metal substrate and fine abrasive grains are firmly fixed to the back surface by a fixing layer. 6 is a plan view of the same, FIG. 7 is an exploded perspective view of a frame for manufacturing a metal dental abrasive strip, and FIG. 8 shows a metal substrate in the frame shown in FIG. FIG. 3 is an explanatory front view showing a state in which it is sandwiched and fixed. In the drawing, 1 is a metal substrate, 2 is a coarse abrasive grain fixed to the surface of the substrate 1, and 3 is a fine abrasive grain fixed to the surface of the substrate 1 opposite to the coarse abrasive grain 2. These are polishing abrasive grains, such as coarse polishing abrasive grains 2 and fine polishing abrasive grains 3, which are firmly fixed by a fixing layer 4 formed by a brazing method. Reference numeral 5 designates a frame for manufacturing a metal dental abrasive strip according to the present invention, with a ceramic bottom plate 5a, a ceramic top plate 5b, and a substrate 1 sandwiched between the bottom plate 5a and the top plate 5b. The top plate 5 is made of ceramic screws 5c that are fixed to the bottom plate 5a and the top plate 5b.
Two abrasive fixing holes X are provided in b. Next, an embodiment of the dental polishing strip according to the present invention will be described. Examples 1 to 3 and Comparative Examples 1 to 2 were manufactured as described below and subjected to respective tests, and the results were summarized and displayed later. Example 1 The length is set at a predetermined position on the ceramic bottom plate 5a.
Place a copper board 1 of 130 mm x width 60 mm x thickness 0.1 mm,
On top of that, there are two abrasive fixing holes X made of ceramic with sizes of 65 mm x 55 mm long and 50 mm long x 55 mm wide on the left and right. Place the upper plate 5b whose partition length is 15 mm,
The copper substrate 1 is sandwiched and fixed between the bottom plate 5a and the top plate 5b using ceramic screws 5c, and first, 65% of its weight of silver is applied to the carborundum rough polishing abrasive grains 2 with a grain size of 74 to 88 μm. A mixture of fine wax powder and paste in an aqueous flux solution is poured into one of the abrasive grain fixing holes X of the upper plate 5b until it reaches a predetermined thickness, and then carborundum fine polishing with a grain size of 15 to 18 μm is performed. The abrasive grains 3 are mixed with silver wax fine powder weighing 45% of their weight and made into a paste in an aqueous flux solution, and then inserted into the other abrasive grain fixing hole X of the upper plate 5b until a predetermined thickness is reached. Place the powder on the vibrating table of a dental vibrator and press it with your hand to use the vibration of the vibrator to create coarse and fine polishing carbs in each abrasive fixing hole X on the copper substrate 1. After uniformly distributing the paste containing random abrasive grains 2 and 3, it was transferred from the vibrating table of a vibrator into a dryer and dried at 100°C for 1 hour. Thereafter, it was taken out of the dryer, and the ceramic screws 5c fixing the bottom plate 5a and top plate 5b of the frame 5 were removed and disassembled.
After the atmosphere of the electric furnace was sufficiently replaced with argon gas, the copper substrate 1 on which the paste containing the abrasive grains 2 and 3 was placed was heated to 450°C, and silver wax was placed on it. After completely melting the fine powder,
After cooling in a furnace, the carborundum abrasive grains 2 and 3 are fixed with a fixing layer 4 made of silver wax, leaving a non-polishing abrasive grain part with a width of 15 mm in the center of the copper substrate 1, and a metal dental grade with a width of 55 mm is formed. After making an abrasive strip and thoroughly washing it in boiling water, use a cutting machine to cut it into pieces with a length of 60 mm for the abrasive grain part for coarse polishing, a length of 45 mm for the abrasive grain part for fine polishing, and a length of abrasive grain for non-abrasive grain. length 120mm x width 4 with width 15mm
A metal dental polishing strip of 13 mm was cut into 13 pieces. Example 2 The length is set at a predetermined position on the ceramic bottom plate 5a.
A stainless steel substrate 1 of 130 mm x width 60 mm x thickness 0.08 mm is placed, and on top of it is made of ceramic with abrasive grain fixing holes X each having a length of 50 mm x width 55 mm.
Place the upper plate 5b, which has a size of 50 mm x 55 mm width divided into left and right sides, and the length of the central partition between the two abrasive grain fixing holes X is 10 mm, and attach the bottom plate using ceramic screws 5c. The stainless steel substrate 1 is sandwiched and fixed between the upper plate 5a and the upper plate 5b.
The Alundum coarse polishing abrasive grains 2 are mixed with 55% of the weight of silver wax fine powder and made into a paste in an aqueous flux solution. Pour until the particle size is 9.
~12 μm alundum fine polishing abrasive grains 3 are mixed with 35% of the weight of fine silver wax powder and made into a paste in an aqueous flux solution, and then the abrasive fixing hole X is formed on the other side of the upper plate 5b. Place it on the vibrating table of a dental vibrator and press it with your hand, and use the vibration of this vibrator to spread the abrasive grains into each abrasive fixing hole X on the stainless steel substrate 1. After uniformly distributing the paste containing alundum abrasive grains for coarse polishing and fine polishing, it was transferred from the vibrating table of a vibrator to a dryer and dried at 100°C for 1 hour. .
Thereafter, the material was taken out of the dryer, the ceramic screws 5c fixing the bottom plate 5a and the top plate 5b of the frame 5 were removed and disassembled, and a paste containing abrasive grains 2 and 3 was made. Place the stainless steel substrate 1 on top of the stainless steel substrate 1, replace the atmosphere inside the electric furnace with argon gas, raise the temperature inside the furnace to 450℃, and completely remove the fine silver wax powder. After melting, the alundum abrasive grains 2 and 3 are fixed with a fixing layer 4 made of silver wax, and a non-polishing abrasive part with a width of 10 mm is formed in the center of the stainless steel substrate 1. A metal dental polishing strip with a width of 55 mm was prepared, and after thorough cleaning in boiling water,
The length of the abrasive grain part for coarse polishing is 45 mm using a cutting machine.
Eleven metal dental polishing strips of 100 mm in length and 4.5 mm in width were obtained, with a fine polishing abrasive grain portion having a length of 45 mm and a non-polishing abrasive grain portion having a width of 10 mm. Example 3 The length is set at a predetermined position on the ceramic bottom plate 5a.
A stainless steel substrate 1 of 130 mm x width 60 mm x thickness 0.1 mm is placed, and on top of it is made of ceramic with abrasive grain fixing holes X each having a length of 55 mm x width of 55 mm.
Place the upper plate 5b, which has a size of 65 mm x 55 mm in width divided into left and right sides, and the length of the central partition between the two abrasive grain fixing holes X is 1 mm, and attach the bottom plate using ceramic screws 5c. A stainless steel substrate 1 is sandwiched and fixed between the upper plate 5a and the upper plate 5b.
149 μm Alundum coarse polishing abrasive grains 2 are mixed with 85% of the weight of silver wax fine powder and made into a paste in an aqueous flux solution. Pour until thick.
Next, 45% of the weight of silver wax fine powder was mixed with Alundum fine abrasive grains 3 having a particle size of 15 to 18 μm, and the mixture was made into a paste in an aqueous flux solution.
Pour the abrasive grains into the other abrasive fixing hole After uniformly distributing a paste containing alundum abrasive grains 2 and 3 for rough polishing and fine polishing on the stainless steel substrate 1 in the hole X, the paste is placed on the vibrating table of a vibrator. Transfer to a dryer and heat at 100℃ for 1 hour.
Let dry for an hour. Thereafter, the material was taken out of the dryer, the ceramic screws 5c fixing the bottom plate 5a and the top plate 5b of the frame 5 were removed and disassembled, and a paste containing the abrasive grains 2 and 3 was obtained. Place the stainless steel substrate 1 placed on top into an electric furnace, and after replacing the atmosphere inside the electric furnace with argon gas, raise the temperature inside the furnace to 450°C to completely melt the fine silver wax powder. After that, the alundum abrasive grains 2 and 3 are fixed with a fixing layer 4 made of silver wax, leaving a 1 mm wide non-polishing abrasive grain part in the center of the stainless steel substrate 1. After making a 55 mm metal dental polishing strip and thoroughly washing it in boiling water, use a cutting machine to cut it into pieces with a length of 50 mm for the abrasive grain part for coarse polishing and a length of 60 mm for the abrasive grain part for fine polishing.
Seventeen metal dental abrasive strips measuring 111 mm in length and 3 mm in width were obtained with a non-abrasive abrasive portion having a width of 1 mm. Example 4 The length is set at a predetermined position on the ceramic bottom plate 5a.
A stainless steel substrate 1 of 130 mm x width 60 mm x thickness 0.05 is placed, and on top of it is made of ceramic with abrasive grain fixing holes X each having a length of 50 mm x width of 55 mm.
Place the upper plate 5b, which has a size of 50 mm x 55 mm width divided into left and right sides, and the length of the central partition between the two abrasive fixing holes X is 5 mm, and attach the bottom plate using ceramic screws 5c. A stainless steel substrate 1 is sandwiched and fixed between the upper plate 5a and the upper plate 5b.
55% of its weight in Alundum coarse polishing abrasive grains 2
Mix fine powder of silver wax and make a paste in an aqueous flux solution. Pour it into the abrasive fixing hole X on one side of the upper plate 5b until it reaches a predetermined thickness. A paste containing Alundum rough polishing abrasive grains 2 is evenly distributed on the stainless steel substrate 1 within the abrasive fixing hole X by using the vibration of the vibrator. After that, transfer it from the vibrator table to a dryer and heat it at 100℃ for 1 hour.
Let dry for an hour. Thereafter, it is taken out of the dryer, and the ceramic screws 5c fixing the bottom plate 5a and top plate 5b of the frame 5 are removed and disassembled to form a paste containing the Alundum coarse abrasive grains 2. Place the stainless steel substrate 1 with the material on top into an electric furnace, and after replacing the atmosphere inside the electric furnace with argon gas, the temperature inside the furnace is set to 450℃.
After raising the temperature to ℃ and completely melting the silver wax fine powder, it is cooled in a furnace and then turned into Alundum coarse polishing abrasive grains 2.
was fixed with a fixing layer 4 made of silver wax, and a rough polishing abrasive grain portion having a length of 50 mm and a width of 55 mm was prepared on one side of the stainless steel substrate 1. Thereafter, the stainless steel substrate 1 is placed again at a predetermined position on the bottom plate 5a of the frame 5 with the rough polishing abrasive part facing down.
On top of that, there are abrasive fixing holes X made of ceramic with sizes of 50 mm long x 55 mm wide and 50 mm long x 55 mm wide on the left and right, respectively, and the center between the two abrasive fixing holes X. Place the top plate 5b whose partition part has a length of 5 mm, and attach the bottom plate 5a using ceramic screws 5c.
The stainless steel substrate 1 is sandwiched and fixed between the upper plate 5b and the abrasive grains 3 having a grain size of 7 to 12 μm are mixed with fine powder of silver wax in an amount of 35% of the weight of the abrasive grains 3 to form an aqueous flux solution. Pour the paste into the other abrasive fixing hole X of the upper plate 5b where the rough polishing abrasive part is not located below until it reaches a predetermined thickness, and then pour it into the other abrasive fixing hole Place it on top and press it with your hand to uniformly distribute the paste containing Alundum fine polishing abrasive grains 3 of the stainless steel substrate 1 in the abrasive fixing hole X using the vibration of this vibrator. After that, the material was transferred from the vibrating table of the vibrator to a dryer and dried at 100°C for 1 hour.
The ceramic screws 5c fixing the upper plate 5b and the ceramic screws 5c are removed and disassembled, and the stainless steel substrate 1 on which the paste containing Alundum fine abrasive grains 3 is placed is heated. After placing it in a furnace and replacing the atmosphere inside the electric furnace with argon gas, the temperature inside the furnace was raised to 450℃ to completely melt the fine silver wax powder, and then the furnace was cooled.
Alundum abrasive grains are fixed on one side of the other side of the stainless steel substrate 1 with a length of 50 mm x width.
A 55 mm fine and coarse abrasive grain section was prepared. In this case, in order to prevent the rough polishing abrasive grain part to which the Alundum rough polishing abrasive grains 2 were first fixed to be remelted by heating in the electric furnace, it was covered with a heat insulating material and shut off from the heat source. The length 130mm x width 60mm made in this way
mm x 0.05 mm thick stainless steel substrate 1, one side of which has a 50 mm long x 55 mm wide abrasive grain section for coarse polishing, and the other side has a 50 mm long x 55 mm wide abrasive grain section for fine polishing. A metal dental abrasive strip having an abrasive grain part and a non-abrasive abrasive part with a width of 5 mm between the coarse abrasive grain part and the fine abrasive grain part was prepared, and the strip was thoroughly soaked in boiling water. After cleaning, use a cutting machine to cut the pieces into lengths with a length of 50 mm for the abrasive grain part for coarse polishing, a length of 50 mm for the abrasive grain part for fine polishing, and a width of 5 mm for the abrasive grain part for non-polishing.
20 metal dental abrasive strips 105mm x 2.5mm wide
Obtained by cutting into pieces. Comparative Example 1 A commercially available synthetic resin dental abrasive strip measuring 175 mm in length x 3.9 mm in width x 0.15 mm in thickness was made of alundum abrasive grains and most of the particle sizes were 70 to 90 μm. Prepared. Comparative Example 2 The type of polishing abrasive grains is Alundum abrasive grains, and the majority of the grain size of the polishing abrasive grains is 15 to 18 μm in length, and the length is 130 μm.
A commercially available metal dental polishing strip measuring mm x 4.0 mm wide x 0.08 mm thick was prepared. Test Results The metal and synthetic resin dental abrasive strips of the above examples and comparative examples were used in the following experiments, and the results are summarized in Tables 1, 2, and 3. Surface roughness test was performed on 5×5×10 proximal fillings.
mm blocks were prepared, and using this as the work material, they were polished for 30 seconds in the order of coarse polishing abrasive grains and then fine polishing abrasive grains for Examples 1 to 4, and for Comparative Examples 1 to 2, respectively. The work was carried out, and the surface roughness of the workpiece was measured using a surface roughness meter. The results are shown in Table 1.

[Table] In the deterioration test of the substrate and abrasive grain adhesion layer, the cutting debris of the tooth proximal filling attached to the surface of the dental abrasive strip used in the surface roughness test was cleaned and sterilized for reuse. It is immersed in a cleaning solution for 12 hours at room temperature, then subjected to ultrasonic cleaning for 20 seconds in that state, washed with distilled water, dried, and then placed in a dry sterilizer at 180℃ for 1 hour. Each time the substrate was heated, deformation and discoloration of the substrate were observed using a stereomicroscope. The results are shown in Table 2.

[Table] On the other hand, Examples 1 to 4 and Comparative Examples 1 to 2 were given to 10 dentists, and they were asked to rate the feeling of insertion between teeth in three stages: easy, normal, and difficult. When transitioning from polishing work to final polishing work, participants were asked to rate the transition time and transition in three stages: easy, normal, and troublesome, and Table 3 shows the monitoring results obtained.

【table】

[Table] Table 1 shows the results of the surface roughness test, and shows the combinations of polishing abrasive grains of Examples and Comparative Examples, and the measurement results of the surface roughness of the workpiece using these combinations. Conventionally, when polishing interproximal tooth fillings, as mentioned above, several types of dental polishing strips are used, one to which coarse abrasive grains are fixed and the other to which fine abrasive grains are fixed. However, it has been found that an excellent polishing effect can be obtained by performing the polishing operation at least twice depending on the combination of polishing abrasive grains. Table 2 shows the results of deterioration tests due to differences in substrate materials, and stainless steel is considered to be stable against all of the cleaning liquids tested and stable against sterilization. . Table 3 shows the results of monitoring the feeling of insertion between teeth, transition time and operability when transitioning from rough polishing to finish polishing by providing a non-polishing abrasive part in the center of the substrate. Compared to the comparative example, it feels very easy to insert between the teeth, and the transfer time is reduced to about 1/4 compared to conventional dental polishing strips. As is clear from the above results, the dental abrasive strip according to the present invention can be used conveniently and economically in dental clinics, and has great potential to contribute to the field of dentistry by shortening the abrasive work time. It's a big one.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of an example of the metal dental abrasive strip according to the present invention before cutting, FIG. 2 is a plan view of the same, and FIG. Front sectional view, Figure 4 is the same plan view,
FIG. 5 shows a metal dental abrasive strip according to the present invention after cutting, in which coarse abrasive grains are firmly fixed to the front surface of a metal substrate and fine abrasive grains are firmly fixed to the back surface by a fixing layer. 6 is a plan view of the same, FIG. 7 is an exploded perspective view of a frame for manufacturing a metal dental abrasive strip, and FIG. 8 shows a metal substrate in the frame shown in FIG. FIG. 3 is an explanatory front view showing a state in which it is sandwiched and fixed. In the drawings 1...Metal substrate, 2...Rough polishing abrasive grains, 3
... Fine abrasive grains, 4 ... Fixed layer, 5 ... Frame for manufacturing metal dental polishing strips, 5a ... Bottom plate, 5b ... Top plate, 5c ... Screws, X ... Abrasive grains fixed Use hole.

Claims (1)

[Scope of Claims] 1. On the left and right sides of either the front and back sides of a metal substrate having a width of 2 to 5 mm, or on the left side of the front side and the right side of the back side, or on the right side of the front side and the left side of the back side. Two types of abrasive grains with different particle sizes, most of which have a grain size of 40 to 150 μm, and the other major part of which has a grain size of 7 to 30 μm, are placed at 40 to 60 mm, respectively, and the middle part has a length of 1 to 15 mm. A metal dental abrasive strip with a thickness of 0.5 mm or less, leaving a part without abrasive grains on the surface. 2. The metal dental abrasive strip according to claim 1, wherein the abrasive grains are hard abrasive particles having a Mohs hardness of 7 or more.