KR100896449B1 - Double contact type dental implant system - Google Patents

Abstract

The present invention relates to a two-contact dental implant, consisting of a fixture (10) and the abutment (20), the conical wedge groove (14) of the fixture (10) of the abutment (20) When the conical wedges 23 are fitted and engaged with each other, and the conical wedges 14 of these fixtures and the conical wedges 23 of the abutment 20 engage with each other, the conical wedges of the abutment 20 ( The second contact surface 23a, which is the outer surface of 23, and the second contact surface 14a of the conical wedge groove 14 of the fixture 20 are primarily brought into surface contact with each other, and the abutment 20 The first contact surface 26 made of a plane orthogonal to the center axis X2 of the first contact surface 13 made of a plane orthogonal to the center axis X1 of the fixture 10 is in secondary surface contact with each other. Contact bonding. The implant of the present invention is a fixture 10 and the abutment 20 is coupled in double contact can be obtained a firm coupling force.

Dental implants, conical engaging projections, conical engaging grooves, contact surfaces, surface contacts, double contacts

Description

Double contact dental implant system {Double contact type dental implant system}

1 is a schematic view of the implant on the gum,

Figure 2a is an exploded view showing an example of a conventional external hexagonal implant,

Figure 2b is a cross-sectional view of the implant of Figure 2a,

Figure 3a is an exploded view showing an example of a conventional inner wedge implant,

Figure 3b is a cross-sectional view of the implant of Figure 3a,

4a is an exploded view of an implant according to the present invention,

4B is a cross sectional view of FIG. 4A;

5 is an operational state diagram when the abutment is removed from the fixture in the state of the implant according to the present invention.

※ Explanation of code for main part of drawing

10: fixture 11: screw

12: abutment coupling portion 13: the first contact surface of the fixture

14 conical wedge 14a: second contact surface of the fixture

15: multi-groove X 1: central axis of fixture

16: screw hole 17: annular groove

18: silicon ring 20: abutment

21: artificial teeth coupling portion 22: fixture coupling portion

α: tilt angle

23: conical wedge 23a: second contact surface of the abutment

24: polygonal projection X2: central axis of the abutment

25 through hole 25b first through hole

25a: second through hole 26: first contact surface of abutment

27: annular groove 28: screw portion

30: fixing screw 31: screw part

32: head 40: silicon ring

42: threaded portion 43: body

44: handle

The present invention relates to a dental implant, and more particularly to a dental implant that improves the mutual coupling method of the fixture and abutment.

As shown in FIG. 1, a dental implant used for treating an artificial tooth includes a fixture 100, which is usually provided on an outer circumferential surface thereof and installed in the alveolar bone A, and the fixture ( 100) is made of an abutment 200 connected to the upper end and the abutment 200 to which the artificial tooth B is coupled to the outside and the abutment fixing screw 300 for fixing the abutment 200 and the fixture 100 to each other. .

The dental implant may be classified into an "external hexagonal type" and an "internal wedge type" according to the shape of the head (abutment and engagement portion) of the fixture. have.

That is, the outer hexagonal implant refers to a type in which an outer hexagonal head is provided at the top of the fixture, as shown in FIGS. 2A and 2B, and the inner wedge implant, as shown in FIGS. 3A and 3B, of the fixture. Refers to a kind formed with a conical wedge for abutment coupling at the top.

In general, the outer hexagonal implant 200 is provided with a hexagonal head 212 protrudes from the top surface 211 of the fixture 210, as shown in Figures 2a and 2b, the abutment 220 A hexagonal groove 222 is formed in the bottom surface 221 so that the hexagonal head 212 of the fixture 210 is inserted into and coupled to each other.

The external hexagonal implant 200 has an abutment 220 in the fixture 210 such that the hexagonal head 212 of the fixture 210 is fitted into the bottom hexagonal groove 222 of the abutment 220. And insert the set screw 230 into the center through hole 223 of the abutment 220 to insert the screw 231 of the set screw 230 into the center screw hole 213 of the fixture 210. By fixing the fixture 210 and the abutment 220 to each other.

However, after the external hexagonal implant 200 is applied to the patient's gums, the implant fixture in use receives a repetitive external force, and thus the force acting up and down and left and right are repeatedly received. .

In the case of the conventional external hexagonal implant 200, the hexagonal head 212 provided on the upper surface of the small fixture 210 also has a small size (height), so that the hexagonal groove of the abutment 220 is eventually reduced. Since the contact surface coupled to 222 is small, the coupling between the fixture and the abutment is relatively weak, and as a result, the coupling between the fixture and the abutment becomes loose.

On the other hand, the inner wedge implant 300 proposed in order to improve the disadvantages of the outer hexagonal implant as described above, as shown in Figures 3a and 3b, the fixture 310, the fixture 310 The abutment 320 is connected to the top of the, and the abutment fixing screw 330 for fixing the abutment 320 to the fixture 310.

The fixture 310 of the inner wedge-shaped implant 300 is provided with a conical wedge groove 311 along the central axis direction. The conical wedge groove 311 is inclined so that the radial diameter of the inner wall gradually decreases. Then, the screw hole 312 is formed coaxially on the bottom surface of the conical wedge groove (311).

In addition, the abutment 320 of the inner wedge-shaped implant 300 is provided with an abutment portion 321 to which an artificial tooth (not shown) is coupled to the upper portion, and the conical wedge of the fixture 310 at the lower portion. The conical engaging projection 322 inserted into the groove 311 is formed to protrude downward along the central axis direction, the convex engaging projection 322 is supported in contact with the inner wall of the conical wedge groove, The lower end of the fixing screw 330 is formed integrally.

The inner wedge-shaped implant 300, as shown in Figure 3b, the fixture 310 is inserted into the alveolar bone, and the conical coupling protrusion 322 of the abutment 320 of the fixture 310 When the abutment 320 is rotated with respect to the fixture 310 by being inserted into the conical wedge groove 311, the fixing screw 330 of the lower end of the abutment 320 is conical wedge groove of the fixture 310 ( It is coupled to the screw hole 312 formed in the bottom of 311. Due to the coupling force of the fixing screw, the abutment 320 is coupled to the fixture 310 while the outer surface of the conical coupling protrusion 322 is in close contact with the inner wall of the conical wedge groove 312 of the fixture 310. .

By the way, when manufacturing the abutment 320 of the inner wedge-shaped implant 300, the fixing screw 330 when the central axis of the conical coupling protrusion 322 and the central axis of the lower fixing screw 330 is shifted from each other ) Is fixed to the screw hole 312 of the fixture 310, the outer surface of the conical coupling protrusion 322 and the inner surface of the conical wedge groove 311 of the fixture 310 is not in close contact with each other. The coupling force between the abutments weakens. In addition, a gap is generated between the fixture and the abutment, and in this case, since there is no part covering the gap between the abutment 320 and the fixture 310, the gap is exposed as it is and food residues in the gap. Foreign matters such as intrusion were disadvantageous causing various problems.

In addition, since the implant must be produced in two types, an outer hexagonal implant and an inner wedge-shaped implant, there is a disadvantage in that it is difficult to standardize or share parts.

Accordingly, an object of the present invention is to provide an implant that eliminates the disadvantages of two types of implants by enabling the integration of one type of implants provided by dividing the conventional two types into one type.

Another object of the present invention is to provide a dental implant having improved coupling force by allowing the fixture and abutment to be contacted and coupled at two parts.

The present invention for achieving the above object is inserted into the alveolar bone to act as an artificial root and the upper portion of the fixture with abutment coupling portion, the fixture coupling to the lower portion to be coupled to the abutment coupling portion of the fixture It is provided with an artificial tooth coupling portion to the artificial teeth coupled to the upper portion and abutment formed in the through hole in the central axis direction and through the through hole of the abutment is fixed to the screw hole of the fixture In the dental implant comprising an abutment fixing screw for fixing the butt to the fixture,

The fixture has a first contact surface formed of a plane orthogonal to the central axis on the top surface, the abutment coupling portion is inclined at a constant inclination angle with respect to the longitudinal central axis of the fixture so that the diameter decreases downward Consists of a conical wedge having two contact surfaces,

The abutment has a first contact surface of the abutment made of a plane orthogonal to the central axis at the lower end of the artificial tooth coupling portion of the abutment to contact and contact the first contact surface of the fixture, the fixture coupling The part consists of a conical wedge having a second contact surface of the abutment inclined at the same inclination angle as the conical wedge groove so as to be fitted into the conical wedge groove of the fixture and in surface contact with the second contact surface of the conical wedge groove.

According to the dental implant of the present invention having the above-described configuration, the conical wedge of the fixture and the conical wedge of the abutment are bonded to each other in a surface contact state, and the first contact surface of the fixture is made of the abutment. Since the one contact surface and the surface contact state to be in close contact with each other, it is possible to achieve a firm coupling between the abutment and the fixture.

In addition, the dental implant of the present invention has a first through-hole formed relatively small in diameter so that the through-hole of the abutment penetrates only the screw portion of the fixing screw, and the first portion to penetrate the head of the fixing screw It consists of a 2nd through-hole part with a diameter larger than a through-hole, and has a structure in which the screw part was formed in the inner wall in the lower part of the said 2nd through-hole part.

According to the dental implant of the present invention having the configuration as described above, even if the fixing screw is removed from the fixture, it is difficult to separate the abutment from the fixture in a normal operation because of the coupling force between the abutment and the fixture. In this case, if the separating screw is inserted into the through hole of the abutment and the screw portion provided in the head of the separating screw is continuously pushed while engaging the screw portion formed in the inner wall of the through hole (second through hole portion) of the abutment, The dismounting screw is detached from the abutment by pushing the abutment away from the fixture, as the lower end contacts the fixture while the head is engaged with the abutment. To facilitate.

In addition, in the dental implant of the present invention, an annular groove is formed in which one of the first contact surface of the fixture and the first contact surface of the abutment fits and rests.

According to the dental implant of the present invention having such a structure, even if a minute gap occurs between the first contact surface of the fixture and the first contact surface of the abutment, the silicone ring seals the gap, thereby preventing foreign matter from entering through the gap. Will be blocked.

Hereinafter, a preferred embodiment of the double contact implant according to the present invention will be described in detail according to the accompanying drawings.

Figure 4a is an exploded view showing a preferred embodiment of the two-contact implant according to the present invention, Figure 4b is a cross-sectional view of the coupling of the implant of Figure 4a.

As shown in FIG. 4A, the dual contact implant according to the present invention includes a fixture 10 placed in an alveolar bone (not shown) and an abutment 20 coupled to an upper portion of the fixture 10. ) Is fixed to the fixture (10) comprises a fixing screw (30).

The fixture 10 is formed in the alveolar bone by being screwed to the screw hole (not shown) formed in the alveolar bone is formed on the outer peripheral surface.

The fixture 10 is provided with a first contact surface 13 of the top surface made of a plane orthogonal to the central axis (X1), and the abutment coupling portion 12 for connecting the abutment. The abutment coupling part 12 is a conical wedge groove 14 formed in the first contact surface 13 in the downward direction along the central axis direction and the central axis (X1) at the bottom of the conical wedge groove 14 It consists of the polygonal groove part 15 dug to a predetermined depth along the direction.

The abutment 20 is provided with an artificial tooth coupling portion 21 to which an artificial tooth (not shown) is coupled to an upper portion thereof, and a bottom surface of the artificial tooth coupling portion 21 is formed of the fixture 10. The first contact surface 26 of the abutment which abuts on and contacts the one contact surface 13 is provided. A fixture coupling portion 22 coupled to the abutment coupling portion 12 of the fixture is provided below the first contact surface 26 of the abutment.

The fixture coupling portion 22 is fitted into the conical wedge groove 14 of the fixture 10 and made of the abutment inclined at the same inclination angle a as the conical wedge groove 14 so as to be in surface contact with the inner wall. Conical wedge 23 having a two-contact surface (23a) and a polygonal projection (24) is fitted to the polygonal groove portion 15 of the fixture at the lower end of the conical wedge (23).

The fixture 10 has a screw hole 16 to which the screw part 31 of the fixing screw 30 is coupled downward along the direction of the central axis X1 at the bottom surface of the polygonal groove part 15. The abutment 20 includes a through hole 25 that penetrates along the central axis X2 direction, and the through hole 25 allows only the threaded portion 31 of the fixing screw 30 to pass therethrough. It consists of a first through hole portion 25b having a relatively small diameter, and a second through hole portion 25a having a relatively large diameter so as to pass the head portion 32 of the set screw 30.

Referring to the procedure for treating the dental implant of the present invention configured as described above to the patient as follows. After fixing the fixture 10 to the alveolar bone of the patient, the abutment 20 is connected and fixed to the fixture 10.

At this time, the polygonal protrusions 24 of the abutment 20 are fitted into the polygonal grooves 15 of the fixture 10, and at the same time, the conical wedges 23 of the abutment 20 are fixed to the fixture 10. It is fitted into the conical wedge 14 of the coupling.

Then, the fixing screw 30 passes through the through hole 25 of the abutment 20, and the screw portion 31 is coupled to the screw hole 16 of the fixture 10. The butt 20 and fixture 10 are firmly coupled.

In particular, as the fixing screw 30 is coupled deeper and deeper into the screw hole 16, the abutment 20 is brought into close contact with the fixture 10. At this time, the second contact surface 23a of the abutment 20 is in close contact with the second contact surface 14a of the fixture 10. At the same time, the first contact surface 26 of the abutment 20 also closely contacts the first contact surface 13 of the fixture 10 in a surface contact state such that the coupling between the fixture 10 and the abutment 20 is performed. Make it stronger without shaking.

That is, according to the dental implant of the present invention, when the abutment 20 is coupled to the fixture 10, the second contact surface 14a of the conical wedge groove 14 of the fixture 10 corresponds thereto. The second contact surface 23a of the abutment 20 is brought into contact with each other, and the first contact surface 13 of the fixture 10 and the first contact surface 26 of the abutment 20 fit with each other. Since the contact is in close contact, a double contact coupling can be obtained, and thus the coupling between the fixture 10 and the abutment 20 can be made stronger.

In addition, the abutment is formed in the first contact surface 26 of the abutment 20 in an annular groove 27 and the silicon ring 18 is inserted into the annular groove 27 as a sealing member. When the garment 20 is coupled to the fixture 10, the silicone ring 18 prevents foreign matter from entering through the gap between the fixture 16 and the contact surfaces 13 and 26 of the abutment 20. You can block.

On the other hand, once the abutment 20 is firmly coupled to the fixture 10 as described above, even if the abutment 20 is to be separated from the fixture 10, it is difficult to remove the conventional tool. In order to simply and easily separate the fixture 10 firmly coupled to the fixture 10 as described above, the present invention provides a part of the through-hole 25 of the abutment 20, preferably the first through-hole part ( The threaded portion 28 is formed at the center lower portion of 25b).

When detaching the abutment 20 from the fixture 10, first, the fixing screw 30 that fixes the abutment 20 to the fixture 10 is removed and removed. Then, as shown in FIG. 5, the attachment screw 40 is inserted into the through hole 25 in which the fixing screw 30 is assembled to remove the attachment 20. Referring to the detachment process of the abutment, the upper handle 44 of the detachment screw 40 is turned to rotate the threaded portion 41 to the threaded portion 28 of the first through hole 25b of the abutment 20. At the same time, the lower end of the body 43 is inserted into position so as to abut the bottom of the screw hole 16 of the fixture (10). In this state, while holding the upper handle and continue to push the separation screw 40 in the insertion direction to further push down the lower end of the body 43 pushes the fixture 10, the fixture 10 is fixed to the alveolar bone no longer Since the push force of the screw 40 is not pushed, it acts as a reaction force to separate the abutment 20 from the fixture 10, thereby separating the abutment 20 from the fixture 10.

In other words, if the separating screw 40 continues to be assembled into the first through hole 25b, the abutment 20 is pushed to the fixture 10 by the reaction force of the pushing force of the screw 40 and is separated. Will be.

As described above, according to the dental implant of the present invention, when the abutment and the fixture are engaged with each other, the abutment and the fixture are coupled by surface contact with each other in two parts. Strong bonding force can be obtained as compared to the conventional implant that is bonded at the portion.

In addition, since the inner coupling type conical coupling portion and the outer coupling coupling portion is provided in one implant, it is possible to standardize one implant product that is separately manufactured and distributed in two types.

Further, the abutment can be separated with a fixture only by assembling the separating screw to the abutment, so that the abutment can be easily removed if necessary.

Claims (3)

delete It is implanted in the alveolar bone (A) and serves as an artificial tooth root, the fixture 10 is formed with a screw hole 16 in the direction of the central axis, and the upper end of the fixture 10, the artificial tooth is coupled to the upper The fixture 10 includes an artificial tooth coupling part 21 and penetrates the abutment 20 having a through hole 25 in the central axis direction and the through hole 25 of the abutment 20. Abutment fixing screw 30 which fixes the abutment 20 to the fixture 10 by being fixed to the screw hole 16 of The fixture 10 includes a first contact surface 13 formed on a top surface orthogonal to the central axis X1 and an abutment coupling part 12 engaged with the abutment. The abutment coupling portion 12 has a conical wedge 14 having a second contact surface 14a inclined at a constant inclination angle α with respect to the longitudinal center axis X1 of the fixture so that the diameter decreases downward. ), The abutment 20 has a first contact surface 26 formed in a plane orthogonal to a central axis so as to contact and contact the first contact surface 13 of the fixture on a lower bottom surface, and the abutment coupling of the fixture. Having a fixture coupling portion 22 engaged with the portion 12, The fixture coupling portion 22 of the abutter is fitted into the conical wedge groove 14 of the fixture so that the conical wedge groove 14 is in surface contact with the second contact surface 14a of the conical wedge groove 14. In the dual-contact dental implant consisting of a conical wedge 23 having a second contact surface 23a inclined at the same inclination angle α as The through hole 25 of the abutment 20 has a first through hole portion 25b having a relatively small diameter so as to pass only the screw portion 31 of the fixing screw 30, and the head portion of the fixing screw. And a second through hole portion 25a having a larger diameter than the first through hole portion 25b so as to pass through (32), and a screw portion on an inner wall at a lower portion of the second through hole portion 25a. Dual-contact dental implant, characterized in that (28) is formed. The method of claim 2, Annular grooves 17 and 27 are formed in either one of the first contact surface 26 of the abutment and the first contact surface 13 of the fixture, and the silicon ring 18 is formed in the annular grooves 17 and 27. Dual contact dental implant, characterized in that coupled.

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