CN208355581U

CN208355581U - Abutment removes drill bit and the abutment removal device with it

Info

Publication number: CN208355581U
Application number: CN201590001351.2U
Authority: CN
Inventors: 朴洸范
Original assignee: Megagen Implant Co Ltd
Current assignee: Megagen Implant Co Ltd
Priority date: 2015-03-03
Filing date: 2015-05-01
Publication date: 2019-01-11
Anticipated expiration: 2025-05-01
Also published as: WO2016140396A1; KR101566457B1

Abstract

The utility model discloses abutment removal drill bit and the abutment removal device with it.The abutment removal drill bit of an embodiment of the present invention includes: that drill bit beats unit, for removing abutment；And discharge unit, it is formed in the drill bit and beats unit, for the generated chip when being drilled to be discharged.On the other hand, another embodiment according to the present utility model, the utility model can provide abutment removal device, comprising: abutment removes drill bit；And head, it is combined with abutment removal drill bit, for making the abutment removal bit.

Description

Abutment removes drill bit and the abutment removal device with it

Technical field

The utility model relates to substrate removal drill bit and with its abutment (abutment) removal device, in more detail, It is related to when substrate is broken, can simply remove the abutment removal drill bit of the remnant of the substrate combined with fixture and has Its abutment removal device.

Background technique

In general, tooth-implanting is the substitute restored when tissue is lost, in dentistry, it is meant that artificial manufacture Tooth transplanting, do not have alveolar bone dentulous plantation can replace the tooth root lost replace tooth root after, fixed artificial tooth Tooth restores the function of tooth.

In general, with time going by, periphery tooth and bone can be damaged in the case where prosthese or artificial tooth, and still, kind Peripheral tooth tissue will not be had an impact by planting tooth, identical as the shape of natural tooth and function, and saprodontia will not occur, therefore Having the advantages that can semipermanent use.

Also, tooth-implanting not only repairs single missing tooth, moreover, increasing partial anodontia tooth and entirely without tooth patient's The function of artificial tooth, and the aesthetic aspect of artificial tooth reparation can be improved, in turn, disperse excessively answering for peripherad support bone tissue application Power, and stabilize denture.

As described above, the tooth-implanting operation executed in dentistry is divided into surgical procedure and connection in alveolar bone implant fixture The fixture and abutment of implantation install the repair process of artificial tooth.

But during using tooth-implanting, the abutment that can occur to combine with fixture is broken by external force Situation, at this point, therefore, the abutment combined with fixture is crushed it in general, abutment is combined in a manner of forcing to buckle into fixture Afterwards, remnant can not simply be removed.

In the state of the art, make remover after abutment combines, removed by remover and to be broken The remnant of abutment because the pressure of abutment and fixture buckles into bound fraction, can not be removed simply in the case.

Utility model content

Technical problem

Therefore, technical problem to be solved by the utility model is to provide when removing abutment, simply it can remove and press from both sides The abutment removal drill bit and the abutment removal device with it for having the remnant of the abutment combined.

Solution to problem

An embodiment according to the present utility model, the utility model includes: that drill bit beats unit, for removing abutment； And discharge unit, it is formed in the drill bit and beats unit, for the generated chip when being drilled to be discharged.

Also, the drill bit beats unit can include: drill bit beats head, is in contact with the abutment, for removing State abutment；And rotary shaft, head, which is beaten, with the drill bit combines.

Moreover, the drill bit beats head can include: cutting portion, for cutting the abutment；And cutting is drawn Portion is led, is combined with the cutting portion, is moved along the through hole for being formed in the abutment to guide the cutting portion.

Also, the cutting guide portion is combined with the cutting portion in a detachable manner.

Moreover, the cutting guide portion can be screwed with the cutting portion.

Also, it is cut in a manner of the interference can be reduced between the abutment when being inserted into the through hole described It cuts a side end of guide portion and interference reduction tapered portion is formed with conical by its shape.

Moreover, the interference, which reduces tapered portion, to provide the arc-shaped of curvature in having.

Also, the drill bit, which beats head, may also include stop section, combine with the cutting portion, in the cutting The predetermined position in portion hinders movement.

Moreover, the discharge unit can be formed by cutting section, the cutting section is by pressing predetermined depth described Drill bit beats made of head and rotary shaft incision.

Also, the cutting section can include: the first cutting section is formed in the drill bit and beats head, for making the brill Head beating head part is multiple；And second cutting section, it is connected with first cutting section, along the axial rotary length Direction is formed.

Moreover, it may include at least a pair of of the cutting portion configured respectively in opposite direction that multiple drill bits, which beat head, First cutting section is formed between the pair of cutting portion.

Also, second cutting section is extended with curve shape from first cutting section.

Moreover, the direction of rotation relative to the rotary shaft, second cutting section is bent round about.

On the other hand, another embodiment according to the present utility model, the utility model can provide abutment removal device, packet Include: abutment removes drill bit；And head, it is combined with abutment removal drill bit, for making the abutment removal bit.

Also, the utility model, which may also include, removes the abutment of bit cutting not by the abutment for removing The non-cutting tip mobile unit of cutting tip.

The effect of utility model

The embodiments of the present invention have the following effects that, when abutment is crushed, cut the abutment combined with fixture Remnant reduces the binding force of bound fraction, can simply remove the remnant of abutment from fixture as a result,.

Detailed description of the invention

The cross-sectional view for the shape that (a) of Fig. 1 is partially combined in a manner of forcing to buckle into fixture for abutment, portion (b) of Fig. 1 It is divided into the state of the part (a) of Fig. 1, the cross-sectional view for the shape that a part of abutment is broken.

Fig. 2 is that the abutment of the utility model first embodiment removes the overall perspective view of drill bit.

Fig. 3 is that the abutment of the utility model first embodiment removes the main view of drill bit.

Part (a) of Fig. 4 and (b) of Fig. 4 are partially to show to bore by the abutment removal of the utility model first embodiment The diagrammatic cross-sectional view of the process of the shape of the remnant of the broken abutment of head cutting.

Part (a) of Fig. 5 and (b) of Fig. 5 partially go to remove drill bit by the abutment of the utility model first embodiment Except the diagrammatic cross-sectional view of the shape of the remnant of broken abutment.

Fig. 6 is that the abutment of the utility model second embodiment removes the overall perspective view of drill bit.

Fig. 7 is the schematic side view of the abutment removal device of the utility model first embodiment.

Fig. 8 is the non-cutting tip mobile unit shown in the abutment removal device of the utility model first embodiment Figure.

Specific embodiment

For the advantages of fully understanding the movement of the utility model and the utility model and pass through the utility model embodiment The purpose of realization illustrates the preferred embodiment of the utility model referring to documented content in attached drawing and attached drawing.

Hereinafter, illustrating the preferred embodiment of the utility model referring to attached drawing, the utility model being thus described in detail.It is each The identical appended drawing reference proposed in attached drawing indicates same parts.

The term of " side " and " other side " used in the present specification may imply that specific side, or not Mean particular side, but be side by any side in many levels, other sides correspondingly are another side.

Also, " in conjunction with " or " connection " term used in the present specification may include that a component and other component are direct In conjunction with or the case where be directly connected to and the case where a component is combined or is indirectly connected with indirectly with other component by connecting component.

The cross-sectional view for the shape that (a) of Fig. 1 is partially combined in a manner of forcing to buckle into fixture for abutment, portion (b) of Fig. 1 It is divided into the state of the part (a) of Fig. 1, the cross-sectional view for the shape that a part of abutment is broken.Fig. 2 is the utility model the The overall perspective view of the abutment removal drill bit of one embodiment.Fig. 3 is that the abutment of the utility model first embodiment removes drill bit Main view.Part (a) of Fig. 4 and (b) of Fig. 4 are partially to show to remove drill bit by the abutment of the utility model first embodiment The diagrammatic cross-sectional view of the process of the shape of the remnant of the broken abutment of cutting.Part (a) of Fig. 5 and (b) of Fig. 5 are partially Briefly cuing open for the shape of the remnant of the broken abutment of drill bit removal is removed by the abutment of the utility model first embodiment View.

As shown, the abutment removal drill bit 100 of the utility model first embodiment includes: that drill bit beats unit 200, go Except abutment 400 (Abutment)；And discharge unit 300, it is formed in drill bit and beats unit 200, the generation when being drilled is discharged Chip.

As described above, tooth-implanting means the transplanting of made tooth, it can generation not having alveolar bone dentulous to plant After replacement tooth root for the tooth root of forfeiture, artificial tooth is fixed to restore the function of tooth, is also implied that when tissue is lost The substitute restored when mistake.

In general, the operation method of tooth-implanting can have various ways, wherein brief description an example is as follows.

Firstly, meeting fixture 500 in alveolus bon e formation by drilling (drilling) and tapping (tapping) process (Fixture) slot of size, in alveolar bone implant fixture 500.

Then, in order to manufacture prosthese, it is close to stamp top cover on the top of fixture 500, then, using taking out material come from mouth Preparation material is removed in chamber removes stamp top cover later.

Then, tooth model is manufactured, and after processing to crownwork, is close to abutment 400 on 500 top of fixture, The fixed fae body on abutment 400, that is, crownwork completes artificial tooth.

Wherein, part (a) referring to Fig.1, abutment 400 are fixed on fixture 500, abutment 400 by bolt (not shown) etc. The part to connect with fixture 500 buckles into mode by pressure and combines (X section referring to Fig.1).

That is, (a) referring to Fig.1 partially comes to be inserted into passing through for bolt (not shown) for example, can be formed in abutment 400 Through-hole 410, abutment 400 is by forcing to buckle into after mode combines (X section of Fig. 1) with fixture 500, in order to further add Binding force is inserted into bolt (not shown) by through hole 410 to combine fixture 500 and abutment 400.

Wherein, the end of abutment 400 is in hexangle type, that is, hex(agonal)screw form (Y portion referring to Fig.1) is not only to force Mode is buckled into, and is simply placed in fixture 500.Only, this is only a kind of embodiment, the utility model requirement of the utility model Protection scope is not limited thereto, and the end of abutment 400 can be in various shapes such as quadrangles.

But masticatory force and a variety of external force are acted on to abutment 400, and therefore, if persistently using tooth-implanting, such as (b) of Fig. 1 Shown in part, a part of the abutment 400 combined with fixture 500 is possible to be broken.

Wherein, bolt (not shown) can be simply removed, and still, buckle into mode and abutment 400 and fixture 500 by forcing The part (X section of Fig. 1) combined is difficult to be removed because of mutual binding force.

In order to solve this problem, the abutment removal drill bit 100 of the utility model first embodiment is used by cutting base Removing method is carried out in the broken part of tooth 400, is described in detail below.

Referring to Fig. 2 and Fig. 3, drill bit beats unit 200 and is combined with fixture 500 to remove the remaining of broken abutment 400 Part 400a (part (b) referring to Fig.1).Wherein, drill bit beats unit 200 for cutting the remnant 400a of abutment 400.

Moreover, it may include that drill bit beats head 210 and rotary shaft 220 that drill bit, which beats unit 200, referring to Fig. 2.

Drill bit beats head 210 and is in contact with the remnant 400a of abutment 400 to remove abutment 400, it may include: cutting Portion 211, cuts abutment；And cutting guide portion 212 may also include stop section 213 for guiding cutting portion 211.

Cutting portion 211 is in contact to be rotated with the remnant 400a of abutment 400, as a result, the remaining portion of abutment 400 Divide 400a that can be broken.

That is, (a) referring to Fig. 4 partially comes for example, in the side of the broken abutment 400 combined with fixture 500 In the case of, force to buckle into the remnant 400a in the abutment 400 of fixture 500 in the state for being clipped in fixture 500, thus can not It is simply removed.

But insertion can be formed for the perforation in conjunction with abutment 400 and the bolt (not shown) of fixture 500 in abutment 400 Therefore drawn in a manner of being cut by making cutting portion 211 accurately be in contact with the remnant 400a of abutment 400 in hole 410 The cutting guide portion 212 for leading cutting portion 211 extends from the end of cutting portion 211, and cutting guide portion 212 is along being formed in base The through hole 410 of tooth 400 is mobile and guides cutting portion 211.

But referring to the part (b) of Fig. 4, according to the guidance of cutting guide portion 212, cutting portion 211 is along being formed in abutment 400 through hole 410 accurately moves, and later, removes the remnant 400a of abutment 400.

Wherein, the remnant 400a, the remnant 400a of abutment 400 of abutment 400 are removed by cutting portion 211 It is removed, as shown in part (a) of Fig. 5, is not cut completely, but small non-cutting tip 400b may be present.

But if the remnant 400a of abutment 400 is cut and thinning from center, to fixture 500 and abutment 400 it Between the binding force that acts on be gradually reduced, if cutting portion 211 is rotated together with to drawing outside fixture 500 with cutting portion 211, and The non-cutting tip 400b not being cut can also be drawn to the external of fixture 500.

Alternatively, after completing cutting, in the case where turnover fixture 500, the non-cutting tip of abutment 400 not being cut 400b is simply drawn to the external of fixture 500 with the reduction of binding force.

That is, if the remnant 400a of removal abutment 400, even if being left non-cutting tip 400b, such as portion (b) of Fig. 5 Shown in point, non-cutting tip 400b can simply be drawn from abutment 400.

In the case, the end (referring to the Y portion of Fig. 5) of the abutment 400 of hexagonal form is not by the pressure side of buckling into Formula combines, and therefore, even if not being cut, can also be simply removed.

On the other hand, referring to part (a) of Fig. 4 and part (b) of Fig. 4, interference can be formed in cutting guide portion 212 and is reduced Tapered portion 218.In the case where cutting guide portion 212 is inserted in through hole 410, the remnant 400a with abutment 400 is reduced It interferes.

That is, being cut cutting guide portion 212 from the position that through hole 410 exceeds in the case where the insertion of through hole 410 The end of guide portion 212 and the remnant 400a of abutment 400 are collided and are interfered.

In the case, as long as reducing tapered portion in the interference that the end of cutting guide portion 212 forms tapered shape 218, cutting guide portion 212 is moved to through hole 410 along the remnant 400a of abutment 400 and is inserted into, and thus reduces cutting The interference of the remnant 400a of guide portion 212 and abutment 400.

For this purpose, interference reduces the tapered shape of tapered portion 218, in the arc-shaped of defined curvature.That is, having interference It is glossily moved along the remnant 400a of abutment 400 part for reducing the curvature of tapered portion 218.

Referring to part (a) of Fig. 2, Fig. 4 and part (b) of Fig. 4, stop section 213 is combined with cutting portion 211, from cutting Another lateral radial direction in portion 211 extends, and the fixture 500 combined with abutment 400 is in contact, to prevent cutting portion 211 from existing Predetermined position is mobile, that is, cutting portion 211 is mobile to cutting direction.

That is, being not only abutment 400, machinable is extremely if cutting portion 211 is inserted into fixed range or more along through hole 410 To the inside of fixture 500.In order to prevent this phenomenon, it after cutting portion 211 only cuts the remnant 400a of abutment 400, needs It prevents mobile to cutting direction.

For this purpose, can be formed in cutting portion 211 from the prominent stop section 213 formed in the upside of cutting portion 211, cutting portion 211 After mobile prescribed limit, stop section 213 is in contact with the upside of fixture 500, and cutting portion 211 can not be moved further as a result,.

On the other hand, referring to Fig. 2, rotary shaft 220 is beaten head 210 with drill bit and is combined, and head 210 can be beaten from drill bit It extends to form, is combined with aftermentioned head 700 (referring to Fig. 7), receive rotary force from head 700.

That is, if being rotated from the rotary shaft 220 that head 700 receives rotary force, with the drill bit that rotary shaft 220 combines Head 210 is beaten also to rotate to direction identical with the direction of rotation of rotary shaft 220.

Referring to Fig. 2, discharge unit 300 is formed in drill bit and beats unit 200, and generated chip when drilling is discharged.

That is, chip can occur if beaing unit 200 by drill bit cuts abutment 400, if not removing this chip, Beaing being carried out continuously for the cutting of unit 200 based on drill bit becomes difficult, therefore, chip is discharged by discharge unit 300.

Wherein, referring to Fig. 2, discharge unit 300 is formed by cutting section 300, and the cutting section 300 beats head by drill bit 210 and rotary shaft 220, it is cut with predetermined depth, the chip cut as a result, from abutment 400 is cut by being formed in The space in portion 300 is opened to the external discharge of abutment 400.

This discharge unit 300 can only be formed in drill bit and beat head 210, chip is discharged to the external of abutment 400 completely Mode head 210 and rotary shaft 220 beaten by drill bit formed.

Referring to Fig. 2, cutting section 300 may include the first cutting section 310 and the second cutting section 320.

Wherein, referring to Fig. 2 and Fig. 3, the first cutting section 310 is formed in drill bit and beats head 210, cuts by this first Portion 310, drill bit, which beats head 210, can be divided into multiple, and the incision between head 210a, 210b is beaten in chip by multiple drill bits Portion 300 is mobile.

It, can be along rotary shaft 220 to length direction shape moreover, the second cutting section 320 is connected with the first cutting section 310 At.That is, chip is moved along the second cutting section 320 from the first cutting section 310 and is completely exhausted out to the outside of abutment 400.

Wherein, referring to Fig. 2, the second cutting section 320 is extended from the first cutting section 310 with curve shape, at this point, second cuts Portion 320 is bent round about relative to the direction of rotation of rotary shaft 220.

That is, the direction of rotation relative to rotary shaft 220, chip is to opposite rectangular movement, therefore, as described above, second cuts The direction of rotation that portion 320 is opened relative to rotary shaft 220 is bent round about, chip moved along the second cutting section 320 and from Abutment 400 is simply discharged to outside.

On the other hand, as shown in figure 3, it may include matching respectively in opposite direction that multiple drill bits, which beat head 210a, 210b, At least a pair of of cutting portion 211a, the 211b set, at this point, the first cutting section 310 can be formed in a pair of of cutting portion 211a, 211b it Between.

Two couples of cutting portions 211a, 211b are shown in Fig. 3, range not office is claimed in the utility model of the utility model It is limited to this, cutting portion 211a, 211b form a pair, or form two pairs.

Hereinafter, illustrating when abutment 400 is crushed, cutting in the abutment removal drill bit 100 of the utility model first embodiment The remnant 400a of the abutment 400 combined with fixture 500 reduces the binding force of bound fraction, as a result, from 500 letter of fixture The functions and effects of the remnant 400a of single removal abutment 400.

Referring to Fig.1, abutment 400 buckles into the fixture 500 that mode is combined with alveolar bone by pressure and combines (referring to Fig.1 X section) after, the through hole 410 by being formed in abutment 400 is inserted into bolt (not shown) and fastens.

In the case, if continuing to use tooth-implanting, as shown in part (b) of Fig. 1, by acting on abutment 400 A part of masticatory force etc., the abutment 400 combined with fixture 500 can be broken.

Wherein, the part that mode (X section of Fig. 1) is combined with abutment 400 and fixture 500 is buckled by pressure, from folder Tool 500 is difficult to remove abutment 400, therefore, removes drill bit 100 by the abutment of the utility model first embodiment and is crushed abutment After 400, remnant 400a is cut to remove.

For this purpose, in the abutment removal drill bit 100 of the utility model first embodiment, with the rotary shaft that head 700 combines 220, which beat head 210 with drill bit, combines, and it includes: cutting portion 211 that drill bit, which beats head 210,；Guide portion 212 is cut, for drawing Lead cutting portion 211；And stop section 213, prevent cutting portion 211 mobile to cutting direction.

By this structure, after cutting portion 211 moves along cutting guide portion 212 and is crushed abutment 400, removal remaining Part 400a, at this point, by stop section 213, it is mobile to appropriate depth, and 400 part of abutment in addition to removing fixture 500.

Moreover, the discharge unit 300 formed by cutting section 300 beats head 210 by drill bit and rotary shaft 220 is formed, When cutting the remnant 400a of abutment 400, the chip that is occurred is along the discharge unit 300 formed by cutting section 300 to base The external discharge of tooth 400, as a result, when cutting abutment 400, is not influenced by chip and is simply cut.

Hereinafter, explanation removes drill bit 100 by the abutment of the utility model second embodiment, simply removed from fixture 500 The structure, function and effect of the remnant 400a of abutment 400 are replaced by above description in the utility model first embodiment Abutment removal drill bit 100 in the identical part of content that illustrates.

In the utility model second embodiment, cutting guide portion 212 in a detachable manner with 211 side of connecting of cutting portion Face has differences with first embodiment.

Referring to Fig. 6, cutting guide portion 212 is the component of length direction, in a detachable manner with 211 phase knot of cutting portion It closes.As described above, cutting guide portion 212 in a detachable manner connect with cutting portion 211 and, different lengths are cut as a result, Guide portion 212 is cut to combine with cutting portion 211.

That is, be formed in the through hole 410 of abutment 400 diameter or fixture 500 length it is varied, therefore, cutting is drawn The diameter or length for leading portion 212 are also required to corresponding change.

For this purpose, cutting guide portion 212 is formed in cutting portion 211 in a manner of it can dismount, with a variety of sizes and diameter Cutting guide portion 212 combines the movement to guide cutting portion 211 with cutting portion 211.

Wherein, cutting guide portion 212 is combined in a manner of dismounting with cutting portion 211 in several ways, such as Fig. 6 institute Show, for example, being formed with bolt (not shown) type of screw thread or screw hole, that is, can be combined with bolt.

On the other hand, if cutting guide portion 212 can not be inserted into, therefore, herein in the not formed through hole 410 of abutment 400 In the case of, after 211 Separation of Cutting guide portion 212 of cutting portion, the remnant of abutment 400 is only removed by cutting portion 211 400a。

Fig. 7 is the schematic side view of the abutment removal device of the utility model first embodiment.Fig. 8 is practical new to show this The figure of non-cutting tip mobile unit in the abutment removal device of type first embodiment.

Hereinafter, explanation passes through the abutment removal device 600 of the utility model first embodiment, simply removed from fixture 500 The structure, function and effect of the remnant 400a of abutment 400 are replaced and the abutment for the utility model by above description Remove the identical part of content illustrated in the first embodiment and the second implementation of drill bit 100.

Referring to Fig. 7, the abutment removal device 600 of the utility model first embodiment includes above-mentioned first embodiment or second The abutment that embodiment illustrates removes drill bit 100.

Moreover, head 700 combines to rotate abutment removal drill bit 100 with abutment removal drill bit 100.

Head 700 can include: the rotary unit (not shown) of motor etc. can be such that abutment removal drill bit 100 rotates；And it is dynamic Power provides unit (not shown), combines with the rotary unit (not shown) of motor etc., provides in many ways to rotary unit Power.

Moreover, abutment removal drill bit 100 is combined with head 700 in a detachable manner.

On the other hand, referring to Fig. 8, the abutment removal device 600 may also include non-cutting tip mobile unit 800, not The removal of cutting tip mobile unit 800 removes the non-cutting tip 400b for the abutment 400 that drill bit 100 removes by abutment.

As described above, the non-cutting tip 400b of abutment 400 and cutting portion 211 rotate together with and drawn from fixture 500 or If person's turnover fixture 500 can simply be drawn, still, according to circumstances, non-cutting tip not can be removed in this way 400b。

In the case, not cutting for abutment 400 is completely removed from fixture 500 using non-cutting tip mobile unit 800 Cut part 400b.

That is, non-cutting tip mobile unit 800 can be in the form of tweezers, non-cutting tip mobile unit 800 holds residual After the side of the non-cutting tip 400b of fixture 500, completely removed from fixture 500.

As described above, the utility model is not limited to above-described embodiment, in the thought and range for exceeding the utility model In the case where, the utility model person of an ordinary skill in the technical field can carry out a variety of modification and deformation.Therefore, these are repaired Change example and deforms the claimed range of utility model of number of cases the utility model.

Industrial availability

The utility model can be used for dental care industry.

Claims

1. a kind of abutment removes drill bit characterized by comprising

Drill bit beats unit, for removing abutment；And

Discharge unit is formed in the drill bit and beats unit, for the generated chip when being drilled to be discharged.

2. abutment according to claim 1 removes drill bit, which is characterized in that the drill bit beats unit and includes:

Drill bit beats head, is in contact with the abutment, for removing the abutment；And

Rotary shaft is beaten head with the drill bit and is combined.

3. abutment according to claim 2 removes drill bit, which is characterized in that the drill bit beats head and includes:

Cutting portion, for cutting the abutment；And

Guide portion is cut, is combined with the cutting portion, is moved along the through hole for being formed in the abutment to guide described cut Cut portion.

4. abutment according to claim 3 removes drill bit, which is characterized in that side of the cutting guide portion can dismount Formula is combined with the cutting portion.

5. abutment according to claim 4 removes drill bit, which is characterized in that the cutting guide portion and the cutting portion spiral shell Line combines.

6. abutment according to claim 3 removes drill bit, which is characterized in that can subtract when being inserted into the through hole The mode of interference between the few and described abutment forms interference in a side end of the cutting guide portion with conical by its shape and reduces Tapered portion.

7. abutment according to claim 6 removes drill bit, which is characterized in that it is in have regulation that the interference, which reduces tapered portion, Curvature it is arc-shaped.

8. abutment according to claim 3 removes drill bit, which is characterized in that it further includes block that the drill bit, which beats head, Portion is combined with the cutting portion, for hindering to move in the predetermined position of the cutting portion.

9. abutment according to claim 2 removes drill bit, which is characterized in that the discharge unit is formed by cutting section, institute Cutting section is stated by beaing head in the drill bit by predetermined depth and the rotary shaft is cut.

10. abutment according to claim 9 removes drill bit, which is characterized in that the cutting section includes:

First cutting section is formed in the drill bit and beats head, multiple for being separated into drill bit beating head portion；And

Second cutting section is connected with first cutting section, is formed along the axial rotary length direction.

11. abutment according to claim 10 removes drill bit, which is characterized in that

It includes at least a pair of of the cutting portion configured respectively in opposite direction that multiple drill bits, which beat head,

First cutting section is formed between the pair of cutting portion.

12. abutment according to claim 10 removes drill bit, which is characterized in that second cutting section with curve shape from First cutting section extends.

13. abutment according to claim 12 removes drill bit, which is characterized in that the rotation side relative to the rotary shaft To second cutting section is bent round about.

14. a kind of abutment removal device characterized by comprising

Abutment described in any one of claim 1 to 13 removes drill bit；And

Head is combined with abutment removal drill bit, for making the abutment removal bit.

15. abutment removal device according to claim 14, which is characterized in that further include for removing through the abutment Remove the non-cutting tip mobile unit of the non-cutting tip of the abutment of bit cutting.