JPH10216151A - Clamp which can remove already fitted crown under recyclable shape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a crown in such a manner that it can be recycled in a short period of time by eliminating the time which is required for a re-treatment. SOLUTION: In a clamp wherein a pinching part 3 and a gripping part 2 are formed by axially supporting two members at an intermediate part, on one end of the pinching part 3 of the clamp, a slip preventive part 4 which comes into contact with a crown fitted on a tooth, is provided, and at the other end of the pinching part 3, a conical insertion part 5 on which a slide surface treatment is applied, in order to insert the small hole of large and small holes eccentrically provided on the crown, is provided, and the clamp can remove the already fitted crown under a recyclable shape. Then, a limiter 6 is provided on the gripping part 2 or the pinching part 3 so that the tips of the slip preventive part 4 and the insertion part 5 may not come into contact with each other, and the clamp can remove the already fitted crown under a recyclable state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forceps capable of removably removing a crown and a bridge using the crown attached to an affected part in dental treatment.

[0002]

2. Description of the Related Art If an affected part is deteriorated despite the crown being put on after conventional dental treatment, the treatment cannot be performed unless the crown is removed, and the crown is incised with a rotary cutter or the like. Later, it is cut open with pliers or the like to release the adhesion between the teeth and the crown.

[0003]

For this reason, the crown once removed cannot be reused unless it is started again by taking the mold again because it is cut and bent by pliers or the like. On the other hand, if the crown once worn for insurance treatment is removed in a short period of time, the act of attaching (treating) the new crown to the affected area will not be covered by insurance treatment. It is necessary to bear the burden, and the economic burden is large. In addition, in order to mount the crown on the tooth again, it is necessary to form the crown suitable for the patient's teeth by performing the molding again, and there is a disadvantage that the patient must wait until the crown is completed. Therefore, the present invention has been made in view of the drawbacks of the prior art, and since the removed crown originally matches the patient's teeth and has no problem with the crown itself, the crown can be reused in a reusable form. It is an object to provide a treatment tool that can be removed.

[0004]

According to the present invention, there is provided a forceps in which a clamping portion and a gripping portion are formed by pivotally supporting two members at an intermediate portion, and one end of the clamping portion of the forceps is fitted into a tooth. A non-slip portion that comes into contact with the inserted crown is provided, and the other end of the holding portion is a conical and smooth-surfaced insertion for insertion into the small holes of the large and small holes eccentrically provided in the crown. This object is achieved by a forceps capable of removing a mounted crown in a reusable manner provided with a part.

[0005]

[Effect] The crown used in the treatment of the tooth is put on for the purpose of covering the portion where the enamel has been cut off,
The dentin (including cement) of a tooth serving as a tooth base and a metal crown are internally bonded via an adhesive or closely adhered via a dental cement. Therefore, in order to remove the crown etc., first drill (carbide bar)
Large diameter (2 to 2) so that the height of the center on the side of the crown is lower than the plane of the dental platform until it reaches the dentin at
A 3mm) large hole is drilled through the side of the crown.
Next, further drill (carbide bar) in the hole of the large hole.
Then, a small hole having a small diameter (1-2 mm) is made deeper near the upper surface of the tooth base than the above-mentioned large hole so that the height of the center is the same as or higher than the height of the upper surface of the tooth base. Thereafter, with the non-slip portion of the forceps holding portion according to the present invention in contact with the crown or enamel located on the opposite side to the hole, insert the tip of the insertion portion of the holding portion into the small hole through the large hole. When the grasping part of the forceps is grasped in this state, the tapered side surface of the insertion part slides deeply between the upper edge of the large hole of the crown and the bottom of the small hole made in the tooth base. Because of the conical shape, the upper part of the side of the insertion part pushes up the periphery of the hole provided in the crown, and the adhesion between the dentin or cement tooth and the crown inner wall surface is released, and it is easily removed. Is ready to be used.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 is a front view of a forceps according to the present invention, in which a gripping portion 2 and a holding portion 3 are formed by crossing two members supported by a central shaft 1. A non-slip member 4 in the shape of a cone, truncated cone, or rectangular parallelepiped is detachably attached to one end. The non-slip member 4 is preferably formed of rubber or metal having a large coefficient of friction. In the case of rubber, it is preferable to use a rubber having a truncated cone and having an upper surface depressed so as to function as a suction cup. When it is made of metal, it is preferable that the contact surface be a rough file-like surface, or that three contact points be protruded to support three points. A conical insertion member 5 which is made of metal and has a smooth side surface (for example, a mirror-finished surface) is detachably attached to the other end of the holding portion 3. Reference numeral 6 denotes a limiter for limiting the non-slip member 4 of the holding portion provided on the shaft portion of the forceps and the insertion member 5 so as not to come into contact with each other. Reference numeral 7 denotes a spring for urging the grip portions 2 in the radially expanding direction. It is. It is desirable that the conical insertion member 5 be configured so that the diameter at the tip is 1-2 mm or less and the diameter at the middle is about 1-2 mm. Therefore, the tip does not need to be as thin as a needle.

FIG. 2 shows another embodiment of the non-slip member 3 made of rubber. The anti-slip member 3 is formed so that the upper surface of a substantially truncated cone is a concave surface 12. As a result, since the part functions as a sucker when the part is brought into contact with the tooth enamel or the crown 10, the holding part becomes less slippery. As shown in FIGS. 3 and 4, the crown 10 is bonded to a tooth base 8 made of dentin or cement provided on a molar or incisor via an adhesive 9.

In the forceps according to the present invention having the above-described configuration, for example, a large hole having a diameter of about 2 to 3 mm is formed with a carbide bar or the like so that the upper surface of the tooth base 8 is centered on the side surface of the metal crown 10 covered with the permanent teeth. 14 is cut until it penetrates the side surface. Then, insert a drill (carbide bar) tooth 1
Switch to a small diameter of about 2 mm, insert a drill (carbide bar) from the large hole 14 and insert the tooth base 8 and the crown 1
A small hole 16 having a diameter of about 1 to 2 mm is formed between the inner wall of the ceiling and the inner wall of the ceiling. Next, with the non-slip member 4 provided at one end of the holding portion of the forceps according to the present invention in contact with the side surface of the crown or the like opposite to the hole 14, the insertion member 5 at the other end of the holding portion is inserted into the large hole. 14 into the small-diameter hole 16.
When the grasping portion 2 is grasped, the conical insertion portion enters along the small hole 16, and when the diameter of the insertion member 5 becomes larger than the diameter of the small hole 16, a force for expanding the small hole 16. Begins to take effect. At this time, the bottom surface of the small hole 16 is fixed to the tooth base and cannot move, but the upper peripheral edge of the large hole 14 provided in the crown 10 is pushed up, and finally the tooth base 8 and the crown The adhesive on the inner wall of 10 is peeled off, and the crown 10 is detached from the tooth base 8. After detachment, the forceps are removed from the treatment section, and only the crown 10 is removed using a hand or another tool. In this embodiment, since the limiter 6 is provided on the forceps 1, the insertion member 5 has a structure in which the crown 10 cannot be distorted even if a person proud of the power grasps the grip portion 4 with force. .

The side face of the removed crown 10 has
A hole of about mm is formed and cannot be reused as it is. Therefore, as shown in FIG.
Metal grain 1 having a larger diameter and the same material as crown 14
8 is placed from the outer side, and after the soldering 17 is flown, the placing portion is heated by a burner. Then, about 900 ° C. is melted, and the molten metal penetrates to the inner wall of the crown 10 by the action of the surface tension of the liquid and is kept in contact with the periphery of the large-diameter hole 14. Thereafter, the metal is solidified by gently cooling, and the part solidifies in a state where it protrudes in an arc shape on both the outside and the inside. Therefore, the protruding portion is sharply scraped off with a grinder or the like and polished to be re-used as a reusable crown. Therefore, the treatment is completed by attaching the regenerated crown 10 again via dental cement or the like after treating the tooth.

In this embodiment, the case where the large hole and the small hole are perforated near the crown ceiling wall has been described. However, the present invention is not limited to this case. The same effect can be obtained as long as the hole is formed in the upper part of the large hole.

[0011]

As described above, unlike the conventional forceps, the forceps for dental treatment according to the present invention can remove the crown covering the teeth in a reusable manner, so that the cost for the treatment is increased. In addition, the crown can be reprocessed while the dental treatment is being performed after the removal of the crown, so that the crown can be re-attached in one treatment, thereby improving the efficiency of the treatment. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a forceps according to the present invention.

FIG. 2 is a longitudinal sectional view showing a state in which a large-diameter hole is opened in a crown side surface for treatment.

FIG. 3 is a longitudinal sectional view showing a state in which a small-diameter hole is formed between a crown and a tooth base through a large-diameter hole.

FIG. 4 is a partially enlarged longitudinal end view showing a situation where a crown is removed using the forceps according to the present invention.

FIG. 5 is a longitudinal sectional view showing a state where a metal is placed on the crown for crown regeneration.

FIG. 6 is a longitudinal sectional view showing a state where a metal is melted for crown regeneration.

FIG. 7 is a partially broken sectional view showing another embodiment of a non-slip member attached to one end of a forceps.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Forceps 2 Grasping part 3 Nipping part 4 Non-slip member 5 Insertion member 6 Limiter 7 Spring 8 Tooth base 9 Adhesive 10 Crown 14 Large hole 16 Small hole 17 Brazing 18 Metal particles

Claims (3)

[Claims] 1. A forceps in which a clamping portion and a gripping portion are formed by pivotally supporting two members at an intermediate portion, wherein one end of the clamping portion of the forceps has a non-slip portion which comes into contact with a crown fitted into a tooth. And the other end of the holding portion is provided with a conical and smooth-surfaced insertion portion for insertion into the small holes of the large and small holes eccentrically provided in the crown. A forceps that can remove a mounted crown in a reusable form. 2. The forceps according to claim 1, wherein the insertion portion is detachable, wherein the reusable mounted crown can be removed. 3. A reusable mounted crown is removed, wherein a limiter is provided on a gripping portion or a holding portion so that the tip of the non-slip portion and the tip of the insertion portion do not contact each other. Forceps.