JP3748453B2 - Forceps that can remove the mounted crown in a reusable form - Google Patents

Description

【Technical field】
[0001]
The present invention relates to a forceps for removing a crown mounted on an affected part in a dental treatment and a bridge using the crown in a reusable state and a method for removing the crown using the forceps.
[Background]
[0002]
If the affected area deteriorates even though the crown has been applied after treatment in conventional dental treatment, the treatment cannot be performed unless the crown is removed. After cutting the crown with a rotary cutter, etc. It is cut open to remove the adhesion between the tooth base and the crown.
Therefore, once the crown has been removed, it cannot be reused unless it is re-started from the mold-removal because it has been incised or removed by bending with pliers or pliers.
On the other hand, if the crown once worn for insurance treatment is removed in a short period of time, the installation (treatment) of the new crown to the affected area will be out of insurance treatment, so the dentist who initially performed the treatment It is necessary to bear, and the economic burden is large.
Further, in order to attach the crown to the tooth again, it is necessary to create the crown that matches the patient's teeth from the mold again, and the patient has to wait until the crown is completed.
DISCLOSURE OF THE INVENTION
[Problems to be solved by the invention]
[0003]
The present invention has been made in view of the disadvantages of the prior art. The removed crown originally matches the patient's teeth, and the crown itself has no problem. Therefore, the crown can be reused. An object is to provide a therapeutic tool that can be removed.
[Means for Solving the Problems]
[0004]
That is, according to the present invention, in a forceps in which a gripping portion and a gripping portion are formed by pivotally supporting two members at an intermediate portion, a non-slip portion that comes into contact with a crown fitted into a tooth is provided at one end of the clamping portion of the forceps Provided at the other end of the gripping part is a conical, triangular pyramid or quadrangular pyramid insertion part that is inserted into a small hole of a large or small hole perforated in the crown. This object is achieved by a forceps that can remove the mounted crown in a reusable manner.
The crown used in the treatment of teeth is covered for the purpose of covering the part where the enamel has been scraped off, and the dental dentin (including cement) that becomes the tooth base and the metal crown are internally bonded with an adhesive. It is made to adhere through, or it is made to contact | adhere through a tooth utilization cement.
Therefore, in order to remove the crown, etc., the height of the center on the side surface of the crown is higher than the upper surface of the tooth base until it reaches the tooth base such as dentin of the tooth with a cutting bar such as a carbide bar or a diamond bar. A large hole with a large diameter (2 to 4 mm) is drilled through the side of the crown so that the position is slightly lower.
Next, a small diameter (1 to 3 mm) is set so that the center height is the same as or higher than the height of the upper surface of the tooth base in a cutting bar such as a carbide bar or a diamond bar in the hole of the large hole. A small hole is made deeper than the aforementioned large hole in the vicinity of the upper surface of the tooth base.
Thereafter, with the anti-slip part of the forceps holding part according to the present invention in contact with the crown or tooth enamel located on the opposite side of the hole, the tip of the insertion part of the holding part is made small through the large hole. When the forceps gripping part is narrowed while being inserted into the hole, the tapered side surface of the insertion part slides deeply between the top edge of the crown fistula and the bottom of the small hole in the tooth base. Then, because the insertion part is formed with a tapered shape such as a conical shape, the upper part of the side surface of the insertion part pushes up the periphery of the hole provided in the crown, and the dentine or cement tooth base The crown can be easily detached from the inner wall surface and easily removed.
BEST MODE FOR CARRYING OUT THE INVENTION
[0005]
In the following, the invention will be described in detail according to the illustrated embodiment.
[Example 1]
[0006]
FIG. 1 is a front view of a forceps according to the present invention, in which a gripping portion 2 and a gripping portion 3 are formed by crossing two members pivotally supported on a central shaft 1. At one end, a cone, a triangular pyramid, a quadrangular pyramid, a truncated cone, and a rectangular parallelepiped anti-slip member 4 are mounted. The anti-slip member 4 is preferably formed of rubber or a metal having a large friction coefficient. In the case of rubber, it is preferable that the surface is conical and is recessed so that the soil surface functions as a suction cup.
Moreover, when comprised with a metal, the thing of the structure which supports one point with what the front-end | tip sharpened sharply is preferable.
[0007]
An insertion member 5 having a cone, triangular pyramid, or quadrangular pyramid shape is mounted on the other tip of the gripping portion 3 so that the material is metal and the side surface is smooth (for example, mirror-finished). Yes. The insertion member 5 and the anti-slip member 4 provided at the distal end portion in the present embodiment are configured to be detachably attached to the inner wall at the distal end of the sandwiching portion 3, but are not limited to this, and the implementation of FIG. As shown in the example, it may be configured by bending the tip of the sandwiching portion inward, and polishing and casting the tip in a conical shape.
[0008]
Reference numeral 6 denotes a limiter for restricting the slip prevention member 4 and the insertion member 5 of the holding part provided in the shaft part of the forceps from coming into contact with each other, and reference numeral 7 denotes a spring for urging the gripping parts 2 in the diameter increasing direction. It is. Diameter of the insertion member 5 the tip of the cone to the diameter at the middle portion is configured such that Do about 1 to 3 mm (the same as the small hole drilled in the tooth base) is desirably below 1 to 2 mm. Therefore, it is not necessary to make the tip as thin as a needle.
Next, what is shown in FIG. 7a shows another embodiment of the anti-slip member 3 made of rubber, and is formed so that the top surface of the substantially truncated cone becomes the concave surface 12. FIG. As a result, the member 3 becomes less slippery because it functions as a suction cup when the part is brought into contact with the tooth enamel or crown 10. As shown in FIGS. 3 and 4, the crown 10 is attached to a tooth base 8 made of dentine or cement provided on a molar or incisor via an adhesive 9. FIG. 7 b shows an example in which the shape of the anti-slip member 3 is configured with a conical tip having a sharp tip, and the effect of increasing the friction coefficient with the crown side surface is obtained by the sharp tip. It is done.
[0009]
In the forceps according to the present invention having the above-described configuration, for example, a large hole 14 having a diameter of about 2 to 4 mm is formed with a cutting 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 permanent teeth. Cut until it penetrates the crown side. Thereafter, the teeth of cutting bars such as carbide bars and diamond bars are switched to those having a small diameter of about 1 to 3 mm, cutting bars such as carbide bars and diamond bars are inserted from the large holes 14, and the tooth base 8 and the crown 10 are inserted. A small-diameter hole 16 having a diameter of about 1 to 3 mm is made between the inner wall surface of the ceiling portion.
[0010]
Next, the insertion member 5 at the other end of the holding portion is a large hole in a state where the anti-slip member 4 provided at one end of the holding portion of the forceps according to the present invention is in contact with a side surface such as a crown opposite to the hole 14. 14 through the small diameter hole 16. When the grip portion 2 is gripped, the conical insertion member 5 enters along the small hole 16, and attempts to expand the small hole 16 when the diameter of the insertion member 5 becomes larger than the diameter of the small hole 16. It begins to apply force. 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 upward, 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.
[0011]
After the detachment, the forceps are removed from the treatment unit, and only the crown 10 is removed using a hand or another tool. In the present embodiment, the forceps 1 is provided with the limiter 6, so that even when a person who is proud of the forceps grips the grip portion 4, the insertion member 5 is less likely to distort the crown 10. Yes.
A side surface of the removed crown 10 has a hole of about 2 to 4 mm and cannot be reused as it is. Therefore, as shown in FIG. 5, metal particles 18 having a diameter larger than that of the large hole 14 and made of the same material as that of the crown 14 are placed on the outer surface, and after the ridges 17 are poured, the placement portion is heated with a burner. Then, it melts at about 900 ° C., and the molten metal enters the inner wall of the crown 10 by the action of the surface tension of the liquid and is held in contact with the peripheral edge of the large-diameter hole 14. Thereafter, the metal is solidified by cooling gently, and the portion is solidified in a state of protruding in an arc shape on both the outside and the inside. Therefore, the convex portion is reborn into a reusable crown by grinding and polishing it with a grinder or the like.
[0012]
Therefore, the treatment is completed by attaching the regenerated crown 10 again through dental cement after treating the teeth.
When removing the ceramic crown, when inserting the metal insertion member 5 into the hole, a synthetic resin tube is inserted in advance as a buffer material, and the member 5 is inserted into the hole of the tube. Good.
[Example 2]
[0013]
FIG. 8 shows a second embodiment according to the present invention. In an axially crossed forceps, an air cylinder 20 is pivotally supported on one inner end of the gripping portions 2, 2. A connecting rod 22 connected to the piston 21 in the cylinder 20 is connected to the inner end, and in the present embodiment, the inside of the cylinder chamber 23 is maintained at atmospheric pressure through the hole 24, and the other cylinder The chamber 25 is connected to a three-way valve 27 via a tube 26. One port of the three-way valve 27 communicates with a compressed air supply means (not shown) and the other port communicates at atmospheric pressure. Thus, when the compressed air is supplied into the cylinder chamber 25 by operating the three-way valve 27, the piston 21 moves and crosses the clamping parts 3 and 3 with a predetermined pressure. As a result, the distance between the anti-slip member 4 and the insertion member 5 connected to the end portions of the sandwiching portions 3 and 3 is narrowed, and the insertion member 5 enters the large hole 14 formed in the side surface of the crown 10 and is fixed to the tooth base 8. The crown 10 can be released.
[0014]
Further, when the atmospheric pressure is introduced into the cylinder 25 by operating the three-way valve 27, the forceps can be freely opened and closed because the pressure in the cylinder chambers 23, 25 on both sides of the piston 21 becomes atmospheric pressure. .
[Example 3]
[0015]
FIG. 9 shows a third embodiment according to the present invention, which comprises substantially parallel clamping members a and b similar to a vise, and an insertion member 5 at the tip as in the first and second embodiments. And a locking member 4 are mounted. As shown in the figure, one end of two lots 28 and 29 is fixed in parallel to the other end of the clamping member b, and the other end of the rods 28 and 29 is a hole 30 drilled in the clamping member a. , 31.
[0016]
A cylinder 20 is fixed to the clamping member b located between the rod 28 and 29 fixing portions, as in the second embodiment, and the inner end of the clamping member a is connected to the piston 21 in the cylinder 20. In this embodiment, the inside of the cylinder chamber 23 is maintained at an atmospheric pressure through a hole 24, and the other cylinder chamber 25 is connected to the connecting rod 22 through a vent hole 22 a drilled in the connecting rod 22. Connected to the three-way valve 27.
[0017]
In the forceps 2 according to the third embodiment having the above configuration, when compressed air is supplied into the cylinder chamber 25 via the three-way valve 27 and the connecting rod 22, the clamping member is moved from the relationship that the piston 21 moves to the right in the figure. a is a hole formed in the side surface of the crown 10 in which the gap between the anti-slip member 4 and the insertion member 5 is made parallel to the clamping member b and is connected to the ends of the clamping parts a and b as described above. The insertion member 5 enters 14 and the crown 10 fixed to the tooth base 8 can be detached.
[Example 4]
[0018]
FIG. 10 shows a fourth embodiment according to the present invention. The members 32 and 33 having a holding angle of about 150 degrees are axially attached to each other so as to be symmetrical with respect to each other. 33, the same locking member 4 and the insertion member 5 as those described above are fixed, and on the shaft-attached side of the members 32, 33, the screw rod 35 having the handle 34 fixed thereto is turned in the opposite direction. It consists of what nuts 37 and 38 which screw together are pivotally attached.
[0019]
As a result, when the turning handle 34 is rotated clockwise, for example, the members 32 and 33 screwed by the screw rod 35 are rotated in the clockwise direction so that the members 32 and 33 are moved toward each other. , 33, the distance between the locking member 4 and the insertion member 5 is reduced, and the insertion member enters the hole 14 formed in the side surface of the crown 10 so that the crown 10 fixed to the tooth base 8 can be easily removed. Can be detached.
[Example 5]
[0020]
FIG. 11 shows a fifth embodiment in which the third embodiment is improved to a screw system, and one end is clamped instead of the cylinder and connecting rod connected to the clamping members a and b of the third embodiment. The screw rod 40 that is rotatably connected to the member a is configured to be screwed with the clamping member b, and the rotation adjusting member 42 is joined to the other end of the screw rod 40.
[0021]
In such a configuration, by rotating the rotation adjusting member 42, the clamping member b screwed with the screw rod 40 translates toward the clamping member a in the clockwise direction of the drawing, and the clamping member a in the counterclockwise direction. Translate in the direction away from.
Thus, when the screw member 40 is rotated clockwise, the insertion member 5 is inserted into the hole drilled in the side surface of the crown 10, and when the screw rod 40 is further rotated, the engagement member 4 and the insertion member 5 The interval gradually decreases, and finally the crown 10 can be detached from the tooth base 8.
In the present embodiment, the case where the large hole 16 and the child hole 14 are drilled near the crown ceiling wall has been described. However, the present invention is not limited to this. The same effect can be obtained as long as 14 is drilled in the upper portion of the large hole 16.
[Industrial applicability]
[0022]
As described above, unlike the conventional forceps, the forceps for dental treatment according to the present invention can removably remove the crown on the teeth, and can reduce the cost of treatment. At the same time, the regeneration process of the crown hole can be completed while the tooth is being treated after the crown is removed. Accordingly, the crown that has been detached in one treatment can be attached again, and the treatment can be made more efficient.
In addition, since it is possible to easily make a hole in a ceramic crown, the forceps according to the present invention is not limited to a metal crown, and can be applied as long as a hole can be drilled in the side surface of the crown.
[Brief description of the drawings]
[0023]
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 where a large-diameter hole is opened on the side of a crown 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 via a large-diameter hole.
FIG. 4 is a partially enlarged vertical end view illustrating a situation in which 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 in which metal is melted for crown regeneration.
FIG. 7 is a partially broken sectional view showing another embodiment of the anti-slip member attached to one end of the forceps.
FIG. 8 is a partially transparent front view showing a second embodiment of the forceps according to the present invention configured so that the gripping portion is driven by an air cylinder.
FIG. 9 is a partially transparent perspective view showing a third embodiment in which the forceps according to the present invention is driven by a vise type air cylinder instead of a cross type.
FIG. 10 is a partially transparent front view showing a fourth embodiment of the forceps according to the present invention configured to drive the gripping part by screwing.
FIG. 11 is a partially transparent perspective view showing a fifth embodiment in which the forceps according to the present invention is constructed of a vise type instead of a cross type.

Claims (3)

In a forceps in which a clamping part and a gripping part are formed by pivotally supporting two members at an intermediate part, one end of the clamping part of the forceps is provided with a non-slip part that abuts against a crown side surface fitted in a tooth. At the other end of the part, there is a conical, triangular pyramid or quadrangular pyramid intermediate part with a smooth surface for insertion into the small holes of the small and large holes drilled in the crown and tooth base. A forceps capable of removing a mounted crown in a reusable form, characterized in that an insertion portion having a diameter similar to the diameter of the small hole is provided. The forceps capable of removing a crown already mounted in a reusable form according to claim 1, wherein the insertion portion is detachable. 2. A reusable crown is removed in a reusable form according to claim 1, wherein a limiter is provided on the gripping part or the holding part so that the anti-slip part and the tip of the insertion part do not contact each other. Forceps.

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