JPH07100150A - Remover of post crown - Google Patents

Remover of post crown

Info

Publication number
JPH07100150A
JPH07100150A JP31956891A JP31956891A JPH07100150A JP H07100150 A JPH07100150 A JP H07100150A JP 31956891 A JP31956891 A JP 31956891A JP 31956891 A JP31956891 A JP 31956891A JP H07100150 A JPH07100150 A JP H07100150A
Authority
JP
Japan
Prior art keywords
tooth
pair
continuous
vertical
horizontal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP31956891A
Other languages
Japanese (ja)
Inventor
Kazuaki Igarashi
Kenichi Takehara
一明 五十嵐
健一 竹原
Original Assignee
Kazuaki Igarashi
Morita Tokyo Seisakusho:Kk
一明 五十嵐
株式会社モリタ東京製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kazuaki Igarashi, Morita Tokyo Seisakusho:Kk, 一明 五十嵐, 株式会社モリタ東京製作所 filed Critical Kazuaki Igarashi
Priority to JP31956891A priority Critical patent/JPH07100150A/en
Publication of JPH07100150A publication Critical patent/JPH07100150A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00Dental tools or instruments
    • A61C3/16Dentists' forceps or clamps for removing crowns
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00Dental tools or instruments
    • A61C3/16Dentists' forceps or clamps for removing crowns
    • A61C3/162Dentists' forceps or clamps for removing crowns acting by leverage

Abstract

(57) [Summary] [Purpose] Since the conventional continuous tooth remover has a structure in which a vertical force is strongly applied to a natural tooth which is originally susceptible to vertical cracking during use, the natural tooth that is an abutment tooth often cracks. Solve the problem. [Structure] According to the present invention, a horizontal L is provided from the horizontal portion 36 to the vertical portion 37.
A pair of bending support rods 12 and 12 ′ bent in a letter shape are connected by a connecting stem 14 so as to be openable and closable to form a device frame 1 that can be sandwiched between continuous teeth. A pair of wedge bodies 11 and 11 ', which face each other and taper toward the respective tips, are provided at the respective tip portions of the vertical portions 37 and 37 of the pair of bending supporting rods 12 and 12' so as to project therefrom. It is characterized in that the bending supporting rod horizontal portions 36, 36 are screwed so as to be openable and closable with the rotary bolt 17 so that the facing distance between the wedge bodies 11, 11 'can be expanded or contracted, so that the continuous teeth can be easily sandwiched. In addition, the pushing force between the opposing wedges applies an oblique force to the natural tooth to extract the continuous tooth, and the natural tooth is not cracked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device (remover) for removing an artificial tooth crown such as a differential tooth attached to a continuous tooth, that is, a natural tooth in dentistry.

[0002]

2. Description of the Related Art Tooth crowns of natural teeth (portions that are covered with enamel and are exposed to the outside of the gingiva) are largely lost or discolored by caries or due to physical impact To remove the crown and replace it with an artificial crown to restore the morphology and function of the tooth (tooth).
That is, continuous teeth are provided. The method is usually performed by embedding a lower part of a metal post to which an artificial crown is attached in the root portion of the residual natural tooth (abutment tooth) in which the crown portion is missing.

By the way, the artificial dental crown itself provided in this way is strong and has excellent durability, but after that, the apical periodontitis and secondary teeth are added to the natural tooth which is the abutment tooth. Caries (prosthetically treated abutment tooth with caries again) may occur. If such inflammation occurs, it is necessary to remove the artificial tooth crown part (continuing tooth) from the natural tooth (abutment tooth) and open the pulp cavity of the natural tooth for treatment, and In the processing, first, the continuous tooth is cut or destroyed to be removed, and then the support post is removed.

Conventionally, in such work, continuous teeth (artificial crown)
A cutting tool is used to cut at several points, and then most of the continuous teeth are removed using pliers and the like, and then the post is removed from the abutment tooth. No. 34-18295 or the one shown in FIG. 3 is known. In FIG. 3, the support post C after the continuous tooth is removed as described above is replaced with the abutment tooth B.
The drawing shows a situation in which the removing device is composed of an inverted U-shaped frame 101 and a pair of thick legs 103, 103 ′ inserted so as to be sandwiched between the inverted U-shaped frame 101 and the lower end portion of the frame 101. Reference numeral 102 has a flat surface 106 that is grounded to the surface of the abutment tooth B, and an expandable / contractible cylindrical recess space 104 for holding the support post C is formed in the lower part of the thick legs 103 and 103 '. The space 104 is designed to be expanded / contracted by the rotation of a bolt 105 having a knurled screw head, and a through hole in the bent portion of the inverted U-shaped frame 101 is formed in the female screw formed in the upper bent portion of the large legs 103, 103 ′. By rotating a bolt 107 having a knurled screw head threaded through the
03 'is configured to move up and down. Therefore, the flat surface 106 of the removing device is brought into contact with the abutment tooth B, and at the same time, the post C is put in the space 104 below the thick legs 103, 103 'and the bolt 105 is rotated to rotate the pair of thick legs 10
After the post C is gripped by 3, 103 ′, the bolt C is rotated to raise the pair of thick legs, so that the post C can be removed from the abutment tooth B.

[0005]

As described above, in the conventional method, although the continuous tooth is not damaged, a working process for cutting, breaking and removing the continuous tooth is required, so that the working time is long. There are many problems such as the consumption of the bar is large, the patient's chair time is very long, and the use of a cutting tool by pressing in the oral cavity may cause accidental damage to the skin in the oral cavity due to the momentum. There was a point. Also, in the case of the one shown in FIG. 3, the abutment teeth often cracked during use. It is considered that this is because the vertical force is strongly applied to the natural tooth which is originally susceptible to vertical cracking.

[0006]

SUMMARY OF THE INVENTION The present invention not only solves the above problems, but also provides a continuous tooth remover that allows the original continuous tooth to be reused advantageously, and its structure is as follows. Forming a device frame that can be sandwiched between continuous teeth by connecting the base ring portions of a pair of bending supporting rods that are bent in a horizontal L shape from the horizontal portion to the vertical portion so as to be openable and closable by a connecting stem, A pair of wedge bodies projecting from the pair of bending supporting rod vertical portions are formed so as to face the tips of the vertical portions.
The continuous tooth remover is characterized in that a middle part of the pair of bent supporting rod horizontal portions is screwed so as to be openable and closable by a rotary bolt so that a facing interval between the wedge bodies can be expanded and contracted.

[0007]

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a cross-sectional view of an essential part showing its usage state. In the figure, 1 is a frame, 1
1, 11 'are a pair of opposed wedge bodies, 12 and 12' are a pair of bending supporting rods, 13 is a base ring portion, 14 is a connecting stem, 17 is a rotating bolt, 36 is a horizontal portion of the bending supporting rod, 37 Is the vertical part of the bending support. The continuous tooth remover shown in FIG.
The device frame 1 is formed so that it can be opened and closed by and can be sandwiched between continuous teeth. Further, the pair of bending supporting rods 1
A pair of wedge bodies 11, 11 ′ facing each other and having a taper toward each tip is provided at each tip of the vertical portions 37, 37 of 2, 12 ′.

A through hole 15 is formed in the middle of each horizontal portion 36, 36 of the pair of bending support rods 12, 12 ', and a square nut 16 is provided outside each through hole 15, 15. 1
6 is immovably embedded. Reference numeral 17 denotes a rotary bolt having left and right screws in opposite directions, and a knurled rotary knob 19 fixed to the center thereof.
It passes through 5 and 15 and is screwed to the square nuts 16 and 16 of left and right reverse screws. The pair of bending rod horizontal portions 36, 36 are screwed together by the rotary bolt 37, and the rotary knob 1
By slightly moving 9, the space between the horizontal portions 36, 36 is opened and closed, and the facing interval between the tips of the wedge bodies 11, 11 'can be expanded or contracted. Reference numeral 18 is a spring for expanding the space between the horizontal portions 36, 36.

In the continuous tooth remover of the present invention, as shown in FIG. 2, a pair of wedge-shaped recesses formed by slitter cutting on a part of the outer symmetrical surface of the joint surface D between the continuous tooth A and the natural tooth abutment tooth B. The rotary knobs 19 with knurls are finely rotated to insert the wedge bodies 11 and 11 ', and then the rotary knobs 19 are rotated and pushed toward the central portion of the joint surface. Since the pair of wedges 11 and 11 'face each other and form a taper toward the tip, a downward force b is applied to the abutment tooth B, and an upward force to the continuous tooth A. The force is increased by the addition of a, the continuous tooth A and the abutment tooth B, which is a natural tooth, are separated at the joint surface, and the post C is pulled out from the abutment tooth B while being fixed to the continuous tooth A. In the present invention, the force applied to the natural tooth that is the abutment tooth B at this time is not applied vertically or outward because the wedge bodies 11 and 11 ′ form a taper as shown in the figure, and the force is not As a result of the addition to the diagonally lower center of the natural tooth, the natural tooth does not crack.

[0010]

According to the continuous tooth remover of the present invention configured as described above, the continuous tooth can be easily and reliably pinched, and the original continuous tooth is not destroyed unlike the conventional method, and the continuous tooth is naturally removed. It can be easily removed from the tooth abutment. And the particularly advantageous point is that the vertical force from directly above is not applied to the natural tooth of the abutment tooth, but it is applied in a state in which the force is distributed from the upper parts on both sides to the diagonally lower center part, There is no risk of dehiscence of weak natural tooth abutments. Furthermore, since the removed continuous tooth has the post as it is, the post can be reused after the apical periodontitis of the abutment tooth is treated.
This has a significant advantage compared with the conventional method in which a new continuous tooth has to be manufactured again. As described above, the present invention has many excellent advantages and contributes greatly to the field.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a continuous tooth remover of the present invention.

FIG. 2 is a sectional view of an essential part showing a usage state of the present invention.

FIG. 3 is a perspective view of a conventional technology example.

[Explanation of symbols]

 1 Device frame 11, 11 'A pair of wedge bodies 12, 12' A pair of bending supporting rods 13 A base ring portion 14 A stem for coupling 15 A through hole 16 A square nut 17 A rotating bolt 18 A spring 19 A rotary knob with a knurling 36 A bending supporting rod Horizontal part 37 Vertical part of bending rod

Claims (1)

[Claims]
1. An apparatus frame capable of being sandwiched between continuous teeth by connecting a base ring portion of a pair of bending supporting rods bent in a horizontal L shape from a horizontal portion to a vertical portion with a connecting stem so as to be openable and closable. And a pair of wedge bodies projecting from the pair of bending supporting rods perpendicular to each other so as to face the tips of the vertical portions of the bending support rods.
A continuous tooth remover, characterized in that the pair of bent supporting rod horizontal portions are screwed openably and closably with a rotary bolt so that a facing interval between the wedge bodies can be expanded or contracted.
JP31956891A 1991-11-08 1991-11-08 Remover of post crown Pending JPH07100150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31956891A JPH07100150A (en) 1991-11-08 1991-11-08 Remover of post crown

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31956891A JPH07100150A (en) 1991-11-08 1991-11-08 Remover of post crown

Publications (1)

Publication Number Publication Date
JPH07100150A true JPH07100150A (en) 1995-04-18

Family

ID=18111723

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31956891A Pending JPH07100150A (en) 1991-11-08 1991-11-08 Remover of post crown

Country Status (1)

Country Link
JP (1) JPH07100150A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6413088B1 (en) 2000-03-30 2002-07-02 Kazuko Kawaguchi Instrument and method for removing dental restoration

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6413088B1 (en) 2000-03-30 2002-07-02 Kazuko Kawaguchi Instrument and method for removing dental restoration

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