JPH1119098A - Tool for tooth extraction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and safely extract a tooth. SOLUTION: A pair of rod bodies is pivoted crossing each other, a tooth extraction base part 3 is formed at the tip part of one rod body and a part for inserting a screw 12 to be screwed into a tooth to be extracted is formed on the tooth extraction base part while a buffer body is provided on both sides of the inserting part on the rear of the tooth extraction base part. A wedge part 4 inclined to the side of an internal rim part is provided at the tip part of the other rod body and a cut opened at the internal rim part is formed at the wedge part 4 at a position corresponding to the insertion part at the tooth extraction base part and the screw 12 inserted through the insertion part at the tooth extraction base part is reduced to close after screwed into the tooth to be extracted so that the internal rim part of the wedge part 4 is fitted between the tooth extraction base part and the head of the screw to get the screw inserted through the cut. This causes an expansion between the tooth extraction base part 3 and the head of the screw and makes the screw 12 and the tooth Da having the screw 12 screwed thereinto vertically move to extract the tooth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tooth extraction device for extracting a tooth to be extracted, such as a tooth decay, and in particular, a remnant root whose upper part is mostly missing.

[0002]

2. Description of the Related Art A typical tooth extraction device as a conventional tooth extraction tool has a beak provided at a distal end of a column having a base portion as a handle. The beak was gradually inserted into the periodontal ligament space between the root and the alveolar bone to tilt the tooth, and then the roller was rotated to dislocate and remove the tooth from the alveolar bone.

[0003]

However, the above-mentioned tooth extraction device has the following problems to be solved. (1) The periodontal ligament is narrow, especially in the residue, the surrounding gingiva has been covered, and it is difficult to insert the litter into the periodontal ligament. (2) Insertion of a roller causes damage and bleeding of the gingiva, making it difficult to look directly into the surgical field and causing a large amount of surgical invasion (damage). (3) There is a high risk that the roller slips off during the operation, damaging the surrounding soft tissue and damaging the alveolar bone.

[0004]

SUMMARY OF THE INVENTION The present invention is based on the above-mentioned prior art, and in view of the problem that it is difficult to perform a surgical operation on a roller and, if it fails, injuries the mouth, a pair of rods is moved toward the distal end. At the tip of one of the rods to form a board portion, and at the board portion, form insertion portions for screws to be screwed into the teeth to be removed, and on both sides of the insertion portion on the back surface of the board portion. And a wedge portion inclined toward the inner edge is provided at the tip of the other rod, and a notch opening at the inner edge of the wedge is inserted into the insertion portion of the tooth extraction base. The screw formed at the position corresponding to the above and screwed into the insertion portion of the board part is screwed into the tooth to be removed, and one of the rod tip parts is fixed. The inner edge of the screw fits between the substrate and the screw head, and the upper end of the screw is Becomes the ON state, and advance further Chijimi閉,
The above problem is solved by expanding the space between the substrate portion and the screw head, moving the screw upward, and also moving the tooth upward to remove the tooth.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a tooth extraction tool 1 has a pair of rods 2 and 2a crossed and pivoted in the same manner as general scissors and forceps. 3
When the wedge portion 4 is provided at the distal end of the other rod 2a and the extraction tool 1 is closed, the extraction base 3 and the wedge 4 are brought into contact with each other and overlap with each other. The gripping portions 5 and 5a are located on the rear end side from the attachment site. The tip of one of the rods 2 is a substrate 6 formed in a flat plate shape.
An insertion portion 7 for a screw 12 to be described later is formed, and cushioning members 8 and 8a having elasticity are provided on both sides of the insertion portion 7 on the back side of the substrate portion 6, and tooth extraction is performed on the distal end of one of the rods 2. A base 3 is formed. Also, the size of the substrate part 6 is such that at least three teeth D, Da, Db are hidden, and the cushions 8, 8a are brought into contact with the teeth D, Db on both sides,
The insertion portion 7 has a notch 9 opening at the inner edge of the substrate portion 6.
It is desirable that Also, the cross-sectional shape of the wedge portion 4 is made into a triangular shape that gradually becomes thicker from the inner edge portion to the outer edge portion, and the surface side is inclined so as to be in sliding contact with the tooth extraction table portion 3 in the superposed state. The inclined surface 10 is a flat surface in the drawing, but may be a concave curved surface (not shown).
In addition, a cut 11 is formed in the wedge portion 4 at an inner edge portion and extends to the center of the wedge portion 4, and the cut 11 is formed at a position corresponding to the insertion site 7 in the tooth extraction base 3. . Also, cut
As shown in FIG. 5A, the opening 11 may be expanded toward the opening side, or a chamfer 15 may be formed at the upper edge of the cut 11 as shown in FIG. 5B. .

Further, the tooth extraction device 1 may be formed as shown in FIG. 2. Specifically, the pair of rods 2 and 2a are made thicker.
In addition, the crossing portions are made circular and the thickness is halved, and a portion of the pair of rods 2 and 2a other than one of the crossing portions is slidable on the outer peripheral surface of the other crossing portion. It has the same structure as a tool that holds such objects.

[0007] In another embodiment, as shown in FIGS.
14 and 14a are formed, and the tooth extraction table 3 and the wedge 4 are positioned below the pivotal connection. In the drawings, the target of tooth extraction is the back tooth, but it can be used for other teeth.

Next, the operation of the tooth extraction device according to the present invention will be described. (1) Screw the screw 12 into the middle tooth Da. (2) Insert the distal end of the tooth extraction tool 1 into the mouth of the patient, and screw the tooth extraction base 3 at the distal end of one of the rods 2 into the insertion site 7.
While passing through the twelve protrusions, the cushions 8, 8a are brought into contact with the teeth D, Db on both sides, so that three teeth D, Da,
Place on Db. (3) When the other rod 2a is moved in the direction of contraction and the inner edge of the wedge 4 is fitted between the screw head 13 of the screw 12 and the tooth extraction base 3, the opening 10 of the cut 10 of the wedge 4 is opened. The upper part of the screw 12 is inserted into the side, and the lower surface of the screw head 13 contacts the inclined surface 9 of the wedge part 4 (see FIGS. 6 and 7). (4) When the other rod 2a is further moved in the direction of closing and closing, the screw head 13 moves along the inclined surface 9, that is, the interval between the screw head 13 and the tooth extraction base 3 is expanded, so that the tooth extraction is performed. The base 3 is pressed against the teeth D and Db on both sides and is stabilized, the screw 12 moves upward, and the intermediate tooth Da is removed (see FIGS. 8 and 9).

[0009]

In short, according to the present invention, a pair of rods 2 and 2a are crossed and pivotally mounted, and a tooth extraction base 3 and a wedge 4 are provided at the distal ends of the pair of rods 2 and 2a so as to overlap in a closed state. So
Since the operation can be performed by opening and closing the rods 2 and 2a with one hand, the tooth extraction can be simplified, and the tooth extraction table 3 is formed with the insertion portion 7 of the screw 12 screwed into the tooth Da to be extracted. Since the buffer members 8 and 8a are provided on both sides of the insertion portion 7 on the back surface, the screw 12 inserted through the insertion portion 7 is screwed into the tooth Da to be removed, so that the tip of one of the rods 2 has the tooth D.
a that can be fixed to the teeth D and Db on both sides of a, and that is opened at the inner edge in the wedge part 4 inclined toward the inner edge
Since the wedge portion 4 is fitted between the substrate portion 6 and the screw head 13 of the screw 12, the space between the substrate portion 6 and the screw head 13 can be expanded, and the cut 11 is formed. Since the screw 12 is formed at a position corresponding to the insertion site 7 in the tooth extraction table 3, it is possible to prevent the screw 12 from coming into contact with the inner edge of the wedge 4 during the closing and closing process. Therefore, according to the above-mentioned tooth extraction device 1, since the tooth can be reliably extracted only by screwing in the screw 12, fixing the tooth extraction pedestal portion 3, and closing and closing the tooth extraction device 1, it is safe without injuring the patient's mouth. It is irrelevant whether the target of extraction is a remnant root or not, regardless of the state of the extraction target, the same operation can be performed, and the gingiva may be damaged during the operation. Since there is no bleeding, there is no bleeding or the amount is very small.

[0010] Further, since the insertion portion 7 in the tooth extraction base 3 is formed as a cut 9 opened at the inner edge of the tooth extraction base 3, a screw is provided.
After the screw 12 is screwed into the tooth Da, the screw 12 can be inserted into the notch 9 and the tooth extraction base 3 can be attached by sliding from the buccal side to the lingual side. Fixing work can be simplified.

Also, a screw 12 perpendicular to the tooth Da to be removed
It is very difficult to screw in the tooth extraction base 3
Screw 12 tilts, but the cut 11 in the wedge portion 4
The upper part of the screw 12 is securely cut in 11
Since it can be inserted into the inside, the operation can be surely performed irrespective of the state of the screw 12, and the practical effect thereof is extremely large.

[Brief description of the drawings]

FIG. 1 is a plan view of a tooth extraction device.

FIG. 2 is a plan view of a tooth extraction device of another embodiment.

FIG. 3 is an enlarged side view of a main part of the tooth extraction device of FIG. 1 in which a distal end side is bent.

FIG. 4 is an enlarged side view of a main part of the tooth extraction device of FIG. 2 with the distal end bent.

FIG. 5 is an enlarged plan view of a main part of a wedge portion showing shapes of other two patterns of cuts.

FIG. 6 is a plan view showing a state in which the tooth extraction table is attached in a state where the tooth extraction tool is used.

FIG. 7 is an enlarged vertical sectional view showing a state in which an inner edge of a wedge portion is fitted between a screw head and a tooth extraction pedestal portion in a use state of the tooth extraction tool.

FIG. 8 is a plan view showing a state in which the tooth extraction device is used and the tooth extraction device is in the most contracted closed state.

FIG. 9 is an enlarged vertical sectional view of FIG.

[Explanation of symbols]

 2, 2a rod 3 tooth extraction base 4 wedge 7 insertion site 8, 8a buffer 9 cut 11 cut 12 screw Da tooth

Claims (3)

[Claims] 1. A pair of rods intersect and pivot, and at the tip of the pair of rods, a tooth extraction base and a wedge that overlap in a contracted state are provided, and the tooth extraction base is screwed into a tooth to be extracted. In addition to forming a screw insertion site, a buffer is provided on both sides of the insertion site on the back surface of the extraction base, and a notch opening at the inner edge is formed in a wedge portion inclined toward the inner edge. A tooth extraction device formed at a position corresponding to an insertion site in a part. 2. The tooth extraction device according to claim 1, wherein the insertion portion in the tooth extraction table portion is a cut opening at an inner edge of the tooth extraction table portion. 3. The tooth extraction device according to claim 1, wherein the cut in the wedge portion is expanded toward the opening.