JP3637964B2 - Dental pliers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, without the bonded orthodontic bracket to the tooth surface to damage the tooth surface, and is intended to relate to dental pliers which can be removed momentarily easily.
[0002]
[Prior art]
Orthodontic is a treatment method for dentition that aims to correct the alignment by moving the uneven teeth and normalize the engagement when the teeth are not aligned and incongruent. is there.
[0003]
Specifically, the orthodontic treatment described above is performed through orthodontic brackets 20 (hereinafter simply referred to as brackets 20) adhered to the outside of each tooth 30, as shown in FIG. The wire 35 is stretched over the entire tooth row, and by tightening the wire 35, pressure is applied to the non-aligned teeth 30 to move them to the aligned position.
[0004]
Here, as shown in FIG. 6, the bracket 20 is made of metal (usually made of stainless steel) or synthetic resin in which a base portion 21, a support portion 22, and a wing portion 23 are integrally formed, or This is a ceramic wire support.
[0005]
The base portion 21 has a rectangular shape that is somewhat curved along the tooth surface. During orthodontic treatment, a predetermined adhesive is applied to the back surface and adhered to the outside of the tooth surface. A support portion 22 projects from the center of the base portion 21, and a concave groove 24 through which the wire 35 is inserted is formed at a tip portion thereof toward the dentition direction, and both sides of the concave groove 24 are formed. In addition, a pair of wing portions 23, 23 extend opposite to each other so as to be substantially orthogonal to the concave groove 24.
The tip portions of the wing portions 23, 23 are curved obliquely downward and are for ligating a wire 35 having a predetermined shape, but consideration is given so as not to damage the oral mucosa.
[0006]
By the way, in the above-mentioned orthodontic mechanism, the positional deviation of the teeth 30 (that is, the positional deviation of the bracket 20) occurs as the orthodontic treatment progresses. This is because the teeth are arranged by the relative relationship between the form of the wire 35 and the bracket 20. Therefore, in order to align the teeth 30 at a predetermined position, the bracket 20 needs to be precisely positioned. For this reason, in the course of treatment, it is often necessary to remove the bracket 20 to correct the position of the bracket 20. At this time, the teeth 30 are often shaken. Moreover, when the orthodontic treatment is finished, of course, all the brackets 20 are removed.
For this reason, in order to perform rapid treatment, the removal of the bracket 20 adhered to the tooth surface must be easily and safely performed instantaneously.
[0007]
[Problems to be solved by the invention]
By the way, conventionally, the following method is generally performed for the removal of the bracket 20.
[0008]
The most widely used method is to buckle or twist the base portion 21 by sandwiching a blade with a sharp tip at the bonding boundary portion between the base portion 21 and the tooth surface of the bracket 20 and peel off the bonding portion. It is a method. However, in this method, a large amount of adhesive is applied, and if there is an excess portion from the base portion 21, peeling becomes difficult, and the blade tip bites into the tooth surface at the time of peeling, so that the enamel of the tooth 30 is damaged. There was a danger that it was easy to give (scraped).
[0009]
In addition, as a method different from the above-described pry-off method, a method of gripping the bracket 20 with a pliers and twisting and peeling off the bonded portion by twisting has been adopted. It has the disadvantage of causing considerable pain to the patient, especially in the case of the lower anterior part of the mandible, where the exfoliation point is likely to be shaken, which can lead to a significant sacrifice to the patient and in the worst case the risk of causing tooth dislocation was there.
In view of the drawbacks of the peeling method using the pliers, another method has been proposed in which the bracket 20 is pulled directly to peel off, but this method always applies a force in a certain direction to the tooth surface due to the structure of the pulling jig. It is difficult to add, lacks certainty, and once it fails, the bracket wings are deformed and the pulling jig is damaged.
[0010]
The ease of bracket removal described above is greatly influenced by the adhesive effect of the adhesive. In particular, the bracket made of ceramic is difficult to peel off compared to the bracket made of metal or synthetic resin. It is known that removal and replacement of brackets requires heating special equipment or ceramic brackets to soften the adhesive, and there is a risk of burns and damage to the tooth tissue. It was. For this reason, a long working time is required, and the treatment time that is uncomfortable for the patient is increased accordingly.
[0011]
The present invention has been made in view of the above-mentioned conventional drawbacks, and its purpose is to provide a bracket attached to a tooth surface in a short time without causing pain to the patient or damaging the tooth surface, and to provide a dental pliers readily removable.
[0012]
[Means for Solving the Problems]
That is, the present invention according to claim 1 is a plier for removing an orthodontic bracket bonded to each tooth surface for orthodontics, which is extended from a pivotal portion and opposed to each other. , Having a pair of jaw parts that open and close in conjunction with the opening and closing operation of the grip part, the tip part of each jaw part is bent to the same side of the opening and closing locus surface of the jaw part , and the bent part, Each of the blade edges is formed in a wedge shape facing each other, and constitutes a pinching portion that pinches the support portion of the bracket from above and below.
In this configuration, when the gripping part of the pliers is lightly gripped, the bracket itself is lifted upward and the base part is bent due to the wedge effect of the pinching part, and the base part itself is deformed and the bracket is easily peeled off from the tooth surface. . In this case, since the impact on the tooth surface is extremely small, there is almost no pain to the patient.
[0013]
Further, the present invention according to claim 2 is the dental plier according to claim 1, wherein when the bracket is sandwiched, the upper and lower surfaces of the clip portion are located at several positions on the tooth surface and the wing portion of the bracket. A convex curved surface is formed so as to make point contact.
Due to the above point contact, the direction in which the stress is applied becomes extremely stable, and the direction is always perpendicular to the tooth surface, so the impact on the tooth surface is minimized and the bracket is efficiently Can be removed.
[0014]
Further, according to a third aspect of the present invention, in the dental pliers according to the first or second aspect, when the bracket is sandwiched, the cutting edge of the sandwiched portion and the support portion of the bracket There is a gap between them, and the base portion of the bracket is non-contact.
In this configuration, when the cutting edge slides into the gap portion and the lower surface of the cutting edge comes into contact with the base portion, the blade portion is lifted by the wedge effect, and at the same time, the cutting edge that comes into contact with the base portion deforms the base portion. Thereby, a bracket peels from a tooth surface.
[0015]
According to a fourth aspect of the present invention, in the dental pliers according to any one of the first to third aspects, a mark for determining a sandwiching position of the bracket is provided in the sandwiching portion. And
In this configuration, the bracket can be removed neatly and can be reused by aligning the pinch mark with the center of the bracket.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0019]
FIG. 1 shows the appearance of a dental plier 1 according to the present invention, in which two arm members 2 and 2 are pivotally attached at a pivotal part 3, respectively, and a pair of jaw parts 4 are connected to the pivotal part 3. , 4 are extended opposite to each other. By grasping the grip portions 5 and 5 formed at the other end portions of the arm portions 2 and 2 and opening and closing them, the pair of jaw portions 4 and 4 are interlocked with the pivot portions 3 as fulcrums. Open and close each other. During the closing operation, the gripping force (compression force) of the grip portion 5 is amplified by the principle of the lever as in the case of ordinary radio pliers, and a strong clamping force is generated between the jaw portions 4 and 4. . The arm members 2 and 2 are always biased to the open side by the spring member 6.
[0020]
Each of the jaws 4 and 4 has a tip portion with a predetermined inclination angle on the same side of the opening and closing locus surface of the jaws 4 and 4 (in the direction protruding from the paper surface in FIGS. 1 and 2) . It is bent, and this bent portion is thin round edge shape and is cutting edge 8, 8 is formed in the cross-sectional wedge shape so as to face each from the upper and lower support portion 22 described later bracket 20 The sandwiching portions 7 and 7 for sandwiching are configured. Further, a minus sign 9 is engraved on the center portion of the upper surface of both the sandwiching portions 7 and 7 as a guide for determining the sandwiching position of the bracket 20.
[0021]
The cross-sectional wedge shape exhibited by each of the clip portions 7 is gently curved in a convex shape as shown in the enlarged view of the main part in FIG. 2 and the cross-sectional view in the main part in FIG. In this case, the upper and lower surfaces of the sandwiching portion 7 are in point contact with the tooth surface and the wing portion 23 of the bracket 20 at several points. Moreover, when the front-end | tip part of the clamping part 7 is formed in a blunt shape, an intraoral soft tissue can be protected from damage at the time of bracket removal.
[0022]
Next, a method of removing the bracket 20 bonded to the tooth surface from the tooth surface using the pliers 1 having the above-described configuration will be described with reference to FIGS. 3 and 4.
[0023]
First, as shown in FIG. 3, the support portion 22 of the bracket 20 is lightly gripped so as to be sandwiched in the vertical direction so that the − mark 9 engraved in the sandwiching portion 7 is positioned substantially at the center of the bracket 20. By properly positioning the cutting edges 8 and 8 with the − sign 9 as a guide, the clamping force by the clamping parts 7 and 7 is effectively transmitted to the main part of the bracket 20, and the bracket 20 suppresses damage as much as possible. Can be removed neatly.
[0024]
In this state, as shown in FIG. 4, the upper surface 7 a and the lower surface 7 b of the sandwiching portion 7 are in point contact with the tooth surface and the wing portion 23 of the bracket 20. In the pliers 1 of this embodiment, this point contact is 4. The shape of the sandwiching portion 7 is determined so that there are ˜8 places. At this time, some gap 10 is generated between the cutting edge 8 of the sandwiching portion 7 and the support portion 22 of the bracket 20, and the base portion 21 of the bracket 20 is not in contact. It has become.
[0025]
In this case, considering the breakage of the bracket 20, it is better to remove the wire 35 in advance if the bracket 20 is made of ceramic. However, if the bracket 20 is made of metal or synthetic resin, the wire It is not necessary to remove 35. Thus, if it is not necessary to remove the wire 35 in advance, there is no worry that the patient accidentally swallows the removed bracket 20.
[0026]
In this state, when the grip portions 5 and 5 of the pliers 1 are lightly gripped, the distance between the sandwiching portions 7 and 7 is narrowed, and the blade edge 8 of the sandwiching portion 7 is moved from the lower side of the wing portion 23 to the back portion (as indicated by the arrow B). The wing portion 23 of the bracket 20 is lifted in the direction of the arrow A (lift-off effect) by the wedge effect which is slid into the gap 10) and has a wedge shape in cross section of the sandwiching portion 7. At that time, the adhesive 26 is broken by the stress perpendicular to the generated tooth surface, and the bracket 20 is peeled off from the tooth surface.
Further, when the wing 23 itself is deformed, the base portion 21 itself of the bracket 20 is deformed due to the bending effect caused by the lower surface 7b of the sandwiching portion 7 coming into contact with the base portion 21 of the bracket 20, As a result, the adhesive 26 between the base portion 21 and the tooth surface is broken, and the bracket 20 is peeled off from the tooth surface.
[0027]
In this case, when the adhesion between the adhesive 26 and the tooth surface is good, the adhesive 26 is detached from the base portion 21. When the tooth surface and the adhesive 26 are not good, the adhesive 26 is removed. Most of them adhere to the base part side. However, in any case, since the adhesive relationship between the bracket 20 and the adhesive 26 does not theoretically exceed the relationship between the tooth quality and the adhesive, it can be said that there is almost no damage to the tooth surface.
[0028]
As described above, in the pliers 1 of the present embodiment, the shape of the sandwiching portion 7 is devised so that the lift-off effect to the wing portion 23 of the bracket 20 and the bending effect to the base portion 21 are generated almost simultaneously. Regardless of the material of the bracket, such as made of product, synthetic resin, or ceramic, the impact applied to the tooth surface can be minimized and the bracket 20 can be removed efficiently.
[0029]
【The invention's effect】
As described above, according to the present invention, when the grip portion of the pliers is lightly gripped, the base itself is deformed because the bracket itself is lifted upward and the base portion is bent due to the wedge effect of the pinching portion. The adhesive part can be broken and the bracket can be easily peeled off from the tooth surface. In this case, the impact on the tooth surface is extremely small, and since it can be peeled off instantaneously, there is almost no pain to the patient.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a dental pliers according to the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is a perspective view showing a usage mode of the dental pliers according to the present invention.
FIG. 4 is a cross-sectional view of an essential part showing a usage mode of a dental pliers according to the present invention.
FIG. 5 is a view showing one embodiment of orthodontic treatment.
FIG. 6 is an external perspective view of a bracket.
[Explanation of symbols]
1 Dental pliers (pliers)
3 Pivoting part 4 Jaw part 7 Clamping part 7a Upper surface 7b Lower surface 8 Cutting edge 9 Mark 10 Clearance 20 Orthodontic bracket (bracket)
21 Base part 22 Support part 23 Wing part 26 Adhesive 30 Teeth

Claims (4)

A plier for removing an orthodontic bracket bonded to each tooth surface for orthodontic treatment,
It has a pair of jaw parts that are extended from the pivot part and face each other and open and close in conjunction with the opening and closing operation of the grip part, and the tip part of each jaw part is bent to the same side of the opening and closing locus surface of the jaw part In addition, the bent portion is formed in a wedge shape with the cutting edges facing each other, and constitutes a sandwiching portion that sandwiches the support portion of the bracket from above and below.   The dental part according to claim 1, wherein the sandwiching part has a convex curved surface such that when the bracket is sandwiched, the upper and lower surfaces make point contact with the tooth surface and the wing part of the bracket at several points. For pliers.   The gap between the cutting edge of the sandwiching portion and the support portion of the bracket when the bracket is sandwiched, and is not in contact with the base portion of the bracket. The dental pliers according to claim 2.   The dental pliers according to any one of claims 1 to 3, wherein a mark for determining a sandwiching position of the bracket is provided in the sandwiching portion.

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