TWI621425B - Bone implant - Google Patents

Abstract

A bone implant for solving the problem of excessive manufacturing cost of a conventional bone implant. The bone implant of the present invention comprises an implant body, a table body and an inner nail. The implant body has a table receiving portion and a locking portion, and the stand receiving portion is provided with a The anti-rotation portion has a minimum inner diameter; the abutment body is provided with an elastic deformation portion, and the elastic deformation portion has a plurality of elastic pieces spaced apart to form a groove between any two adjacent elastic pieces, the elasticity The deformation portion has a maximum outer diameter width when the plurality of elastic pieces are unstressed, the maximum outer diameter width is greater than the minimum inner diameter width, and the elastic deformation portion is alignably coupled to the anti-rotation portion of the implant; the inner nail One end is positioned in the abutment body, and the other end is locked to a locking section that is coupled to the interior of the implant.

Description

Bone implant

The present invention relates to an implant, and more particularly to a bone implant that can be used to implant a bone.

In general, no matter whether it is aging or accidental impact, the tooth defect, if it is not repaired and complexed for the damaged tooth, will affect the occlusion and chewing function, and even cause the back tooth to fall forward, bone atrophy and face shape change, etc. Aftereffects. Among the various methods for repairing tooth defects, "artificial implants" have the advantages of not damaging healthy and natural teeth on both sides, easy to clean, no foreign body sensation, and good aesthetics after implantation, so that artificial tooth implants can be used to repair dental defects. The number of patients has increased year by year.

The term "artificial implant" refers to a dental implant made of medical grade materials (such as titanium or ceramics) that is surgically implanted into the alveolar bone of a patient and then subjected to bone integration before crowning. Installation, the patient is restored to the original teeth to meet the needs of chewing and aesthetic functions; wherein the dental implant comprises an implant and a table body, the dental implant is implanted into the patient by the implant In the alveolar bone, the abutment body provided at one end of the implant is used for positioning and positioning the crown.

In order to ensure that the abutment body can be firmly coupled to one end of the implant, the common dental implants are mostly three-piece, which is an axially extending blind hole formed by one end of the implant, and the branch The base body defines an axially extending inner hole, so that after the abutment body is inserted into the end of the implant body, an inner nail penetrates into the inner hole of the support body body, so that one end of the inner nail can be clamped In the abutment body, the other end extends out of the abutment body and penetrates into the blind hole of the implant to securely lock the The effect of the implant and the abutment body.

However, since the abutment body is placed in the end of the implant without being locked by the inner nail, there is no temporary locking structure between the abutment body and the implant, especially for the upper row. In the dental implant surgery, the abutment body often comes out of the blind hole of the implant, which causes inconvenience in surgery and affects the operation efficiency; even worse, the abutment body dropped on the patient's tongue. Sometimes the patient's tongue is stimulated and naturally causes swallowing action, so that the patient inadvertently swallows the abutment body and causes medical disputes.

To this end, please refer to FIG. 1 , which is a dental implant 9 disclosed in the European Union No. 1419746 "Dental implant system". The conventional dental implant 9 comprises an implant 91 and a table 92. And an inner nail 93; an end of the implant 91 defines an axially extending blind hole 911, so as to form an insertion portion 912 and a locking portion 913 in the interior of the implant 91, the ring of the insertion portion 912 The peripheral wall is provided with a ring flange 914 adjacent to the closed end of the blind hole 911. The abutment body 92 has an implant joint portion 921 connected in the axial direction, a connecting portion 922, a crown joint portion 923, and an axially extending inner hole (not shown), wherein the implant joint portion The 921 is provided with a ring groove 924 adjacent to the free end. The ring groove 924 is provided with a plurality of claws 925 at the free end of the implant joint portion 921. Each of the claw clasps 925 has an outward convex arc shape and is adjacent to each other. A notch 926 is formed between the two claw detents 925; accordingly, when the plurality of claw detents 925 are subjected to a radial compression force, elastic deformation is generated and elastically reset after the external force disappears.

When the conventional dental implant 9 is used, the implant 91 can be implanted into the alveolar bone of the patient, and the implant joint portion 921 of the abutment body 92 can be inserted into the insertion portion of the implant 91. 912. Wherein, in the process in which the implant joint portion 921 of the abutment body 92 extends axially into the blind hole 911, when the plurality of claw clasps 925 contact the ring flange 914, the ring flange 914 will force The plurality of claw 925 are elastically deformed and radially retracted, and after the ring flange 914 is passed, the plurality of claw 925 are elastically reset, and the ring groove 924 of the support body 92 and the ring flange 914 is opposite; according to this, by the plurality of claws 925 abutting on one side of the ring flange 914, the abutment body 92 can The implant 91 forms a click and does not easily come out axially. Finally, the inner nail 93 is inserted into the inner hole of the abutment body 92, so that one end of the inner nail 93 can be locked in the abutment body 92, and the other end protrudes from the abutment body 92 and is locked. The locking portion 913 of the implant 91 achieves the effect of firmly locking the implant 91 and the abutment body 92.

Therefore, the above-mentioned conventional dental implant 9 can be used to lock the abutment body 92 and the implant 91 before being locked by the inner nail 93 when the abutment body 92 is mounted, thereby avoiding the When the abutment body 92 is inserted into the implant 91, the prolapse occurs again. However, the dimensions of the components of the conventional dental implant 9 are already quite small, the ring groove 924 to be formed on the abutment body 92, the claw-shaped buckle 925 which is convexly curved, and the adjacent two The notch 926 formed between the claw clasps 925 and the like is a relatively fine structure, which makes the manufacturing of the abutment body 92 difficult and the molding yield is not good; further, the conventional dental implant 9 not only supports The base body 92 is not easy to manufacture, and the ring flange 914 of the implant body 91 is also formed in the blind hole 911. The change in the diameter of the blind hole 911 from the closed end to the open end is not easy to process, but is small. The hole diameter is enlarged, reduced, and expanded, and then a special drilling tool is required, or a plurality of different processing procedures are required to be formed, so the implant 91 also has high manufacturing difficulty and poor molding yield. The problem is clinically easy because the user is not familiar with the operation mode, and the metal is fatigued by repeated bonding, resulting in a fracture. Therefore, the chuck structure of the conventional dental implant 9 is too complicated, which is not only difficult to manufacture, but also has poor manufacturing efficiency, and is also prone to poor molding yield. Therefore, the conventional dental implant is suitable. The object 9 has the disadvantage of being too expensive to manufacture.

Furthermore, the abutment body 92 of the conventional dental implant 9 must pass through the ring flange 914 of the implant 91 at the plurality of claw clasps 925, and the ring groove 924 of the abutment body 92 and the implant The ring flange 914 of 91 is oppositely positioned to avoid the effect of preventing the abutment body 92 from coming out of the implant 91. That is, the abutment body 92 is unable to maintain a locking relationship with the implant 91 at any time during the process of joining the implant 91, and the operator does not bind the abutment body 92 to the body at a time. In the preset position in the implant 91, the abutment body 92 may still be detached from the implant 91. However, as mentioned above, the ring flange 914 of the implant 91 and the plurality of claw clasps 925 of the abutment body 92 are of a relatively fine structure, so whether the plurality of claw clasps 925 of the abutment body 92 have Through the ring flange 914 of the implant 91, the handling feel may not be accurately transmitted to the operator, so that the conventional dental implant 9 often fails to be used to prevent the abutment body 92 from being implanted. The effect of the body 91 is eliminated, and the structure is weak, which is liable to cause fatigue damage.

It is an object of the present invention to provide a bone implant having a simple snap structure between the implant and the abutment body to reduce manufacturing costs and to have better structural strength.

A second object of the present invention is to provide a bone implant, wherein the abutment body can maintain a latching relationship with the implant at any time during the process of incorporating the implant to ensure that the intended abutment can be effectively achieved. The effect of the body coming out of the implant.

A further object of the present invention is to provide a bone implant having better structural strength to reduce the occurrence of fatigue damage.

In order to achieve the foregoing objective, the technical content of the present invention includes: a bone implant comprising: an implant having an externally threaded portion between the two ends, wherein one end is provided with an axially extending blind hole for The inside of the implant forms a arranging portion and a locking portion, and the accommodating portion is provided with an anti-rotation portion, and the anti-rotation portion has a non-circular shape in a radial section of the implant The shaped hole has a minimum inner diameter, the locking section abuts the closed end of the blind hole; a table body having an elastically deformed portion, a connecting portion and a prosthetic joint, which are axially connected, and An axially extending inner hole, the elastic deformation portion having a plurality of elastic pieces spaced apart to form a groove between any two adjacent elastic pieces, the elastic deformation portion having a force when the plurality of elastic pieces are unstressed a maximum outer diameter width, the maximum outer diameter width being greater than the minimum inner diameter width, the elastic deformation portion being alignably coupled to the anti-rotation portion of the implant; and an inner nail having one end positioned in the inner hole of the abutment body The other end is locked to a locking section that is coupled to the interior of the implant; The elastic piece may be provided with an inclined surface at the free end, so that the elastic deformation portion tapers toward the free end of an outer diameter; the plant The inside of the body may form a block stop section between the support portion of the support and the locking section. In the radial section of the implant, the inner diameter of the locking section is smaller than the branch The inner diameter of the stop portion of the table is formed to form a first abutting surface for abutting the end faces of the elastic pieces; the inner diameter of the abutting portion of the abutment is smaller than the minimum of the abutting portion of the abutting portion The inner diameter is wide to form a second abutting surface, and the inclined surface of each of the elastic pieces abuts against the end edge of the second abutting surface.

Wherein, the abutment receiving portion of the implant body may further be provided with a guiding portion, and the anti-rotation portion of the supporting portion of the supporting portion is adjacent to the locking portion of the implant portion, the guiding portion An inclined surface is formed by abutting the anti-rotation portion toward the open end of the blind hole to form a tapered surface.

The connecting portion of the abutment body may have a small diameter portion and a large diameter portion. The connecting portion is connected to the elastic deformation portion by the small diameter portion, and the large diameter portion is connected to the prosthesis coupling portion.

Wherein the elastic deformation portion of the abutment body is opposite to the anti-rotation portion of the abutment receiving portion of the implant body, and the small-diameter portion of the connection portion of the abutment body is located in the abutment receiving portion of the implant The guiding portion of the connecting portion of the abutment body is exposed to the outside of the plant body.

Wherein, the anti-rotation portion may have a hole having a regular polygon in a radial section of the implant.

According to the foregoing structure, the bone implant of the present invention can be mutually jammed by a simple snap structure between the implant and the support body, so as to prevent the support body from being implanted before the inner nail is locked. The effect of prolapse in the body, and the bone implant of the present invention can relatively reduce many manufacturing costs compared to conventional bone implants that achieve this function. Furthermore, in the bone implant of the present invention, the abutment body can maintain a binding relationship with the implant at any time during the process of incorporating the implant, so as to ensure that the abutment body can be effectively prevented from being implanted. The effect of the out-of-body release, and the structural rigidity of the structure is relatively stable, and the fatigue damage is relatively reduced.

〔this invention〕

1‧‧ ‧ implant

1a‧‧‧Drilling end

1b‧‧‧Connector

11‧‧‧ External thread

12‧‧‧Blind holes

13‧‧‧ Stand support section

131‧‧‧Anti-rotation department

132‧‧‧ Guidance Department

14‧‧‧Locking section

141‧‧‧Threaded Department

142‧‧‧First abutment

15‧‧‧Abutment stop section

151‧‧‧Second abutment

2‧‧‧Support

21‧‧‧Elastic deformation department

211‧‧‧Shrap

2111‧‧‧ Bevel

212‧‧‧"

22‧‧‧Connecting Department

221‧‧‧ Small Trails Department

222‧‧‧Great Path Department

23‧‧‧Prosthetic joints

24‧‧‧ inside hole

3‧‧‧Needles

3a‧‧‧ head end

3b‧‧‧Lock end

31‧‧‧Keyhole

32‧‧‧External thread

W1‧‧‧Minimum inner diameter width

W2‧‧‧Maximum outer diameter width

[Use]

9‧‧‧ Dental implants

91‧‧‧ implants

911‧‧‧Blind hole

912‧‧‧Interposed Department

913‧‧‧Locking

914‧‧‧ ring flange

92‧‧‧Support

921‧‧ ‧ implant junction

922‧‧‧Connecting Department

923‧‧‧ crown joint

924‧‧‧ Ring groove

925‧‧‧ claw buckle

926‧‧ ‧ gap

93‧‧‧Needles

Figure 1: Schematic diagram of a conventional dental implant.

Figure 2 is a perspective exploded view of a preferred embodiment of the present invention.

Figure 3 is a cross-sectional, exploded view of a preferred embodiment of the present invention.

Figure 4 is a schematic illustration of the implementation of a preferred embodiment of the invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt; In a preferred embodiment of the present invention, the bone implant of the present invention generally comprises an implant 1, a base 2 and an inner nail 3, and the support body 2 can be snap-fitted to the implant 1. The inner nail 3 is inserted and locked to firmly join the implant 1 and the abutment body 2. The implant 1 is used for binding to a bone, and the abutment body 2 can be combined with a prosthesis. The prosthesis can be, for example, a crown, a prosthetic or a finger, and the invention is not limited thereto. The type of the implant 1 and the abutment body 2 can also be changed according to the needs of use, and can be understood by those having ordinary knowledge in the art. In the present invention, the bone implant of the crown is selected as an example, but it is not limited thereto.

Referring to Figures 2 and 3, the two ends of the implant 1 are respectively a drilling end 1a and a connecting end 1b, and the drilling end 1a is used for drilling and locking the alveolar bone implanted in the missing tooth of the patient. The connecting end 1b is for connecting the abutment body 2. An external thread portion 11 is disposed between the drilling end 1a of the implant 1 and the connecting end 1b, so that the implant 1 can be smoothly drilled into the alveolar bone and stably fixed in the alveolar bone. The connecting end 1b of the implant 1 defines an axially extending blind hole 12 for forming a table receiving portion 13 and a locking portion 14 in the interior of the implant 1. The section 13 is for receiving a part of the abutment body 2, and the locking section 14 abuts the closed end of the blind hole 12 and is used for locking the inner nail 3. Preferably, the interior of the implant 1 can also form a table stop section 15 between the abutment receiving section 13 and the locking section 14, and the abutment stop section 15 can be used for The end of the abutment body 2 abuts to limit the depth of engagement of the abutment body 2 with respect to the implant 1.

In this embodiment, the abutment receiving portion 13 of the implant 1 can be divided into an anti-rotation portion 131 and a guiding portion 132. The anti-rotation portion 131 of the abutting receiving portion 13 is compared with the guiding portion The portion 132 is adjacent to the locking section 14 of the implant 1. The anti-rotation portion 131 has a non-circular hole in the radial cross section of the implant 1 , and after the abutment body 2 is placed in the anti-rotation portion 131 of the abutment receiving portion 13 , The implant 1 generates an axial rotation; wherein the anti-rotation portion 131 preferably has a regular polygonal hole in the radial cross section of the implant 1 (for example, a regular hexagonal hole as shown in the embodiment of the present embodiment, but Not limited to this, so that the abutment body 2 adjusts the angle of engagement with the implant 1. Further, the anti-rotation portion 131 of the abutment receiving portion 13 has a minimum inner diameter W1 in the radial section of the implant 1. The guiding portion 132 of the abutment receiving portion 13 is expanded by abutting the anti-rotation portion 131 toward the open end of the blind hole 12 to form a tapered surface, and has a guiding axial direction of the supporting body 2 The effect of inserting the blind hole 12 of the implant 1 is.

The locking section 14 of the implant 1 is provided with an internal threaded portion 141 on the inner wall surface, and the inner diameter of the locking section 14 is smaller than the abutment stop section in the radial section of the implant 1 The inner diameter of the flange 15 allows the locking section 14 to form a first abutment surface 142 adjacent to the abutment stop section 15; likewise, in the radial section of the implant 1, the branch The inner diameter of the block stop section 15 is smaller than the minimum inner diameter W1 of the abutment receiving section 13 so that the abutment stop section 15 can be formed adjacent to the abutment receiving section 13 A second abutment surface 151.

The abutment body 2 includes an elastic deformation portion 21 axially connected, a connecting portion 22, a prosthesis joint portion 23, and an axially extending inner hole 24; in the embodiment, the elastic deformation portion 21 has A plurality of elastic pieces 211 are disposed at intervals to form a groove 212 between any two adjacent elastic pieces 211, so that the plurality of elastic pieces 211 have elastic deformation capability capable of being radially retracted, and the elastic deformation portion 21 is The plurality of elastic pieces 211 have a maximum outer diameter width W2 when unstressed, and the maximum outer diameter width W2 is larger than the minimum inner diameter W1 described above. In addition, each of the elastic pieces 211 may further be provided with a slope 2111 at its free end, so that the elastic deformation portion 21 is tapered toward the free end, so as to lift the elastic deformation portion 21 of the support body 2 into the plant. Abutment receiving section 13 of body 1 At the same time, the elastic piece 211 can also have a thinner shape at its free end by the inclined surface 2111, so that it is easier to deform when subjected to force, and an immediate pressing action is generated.

The connecting portion 22 of the abutment body 2 has a small diameter portion 221 and a large diameter portion 222. The connecting portion 22 is connected to the elastic deformation portion 21 by the small diameter portion 221, and the large diameter portion 222 and the false portion The body joint portion 23 is connected; when the support body 2 is combined with the implant body 1, the elastic deformation portion 21 of the support body 2 and the small diameter portion 221 of the joint portion 22 extend through the branch of the implant body 1. The table housing section 13 is exposed to the outside of the implant 1 in the large diameter portion 222 of the connecting portion 22. The inner diameter of the inner hole 24 corresponds to the inner diameter of the inner hole 24 corresponding to the inner diameter of the large diameter portion 222, so that one end of the inner nail 3 is positioned at the small diameter portion 221 and The junction of the large diameter portion 222. In addition, the prosthesis joint portion 23 of the abutment body 2 can be used for a crown (not shown). The shape of the prosthesis joint portion 23 can be different according to the needs of use, and is not implemented in this embodiment. The pattern of the example is limited.

The two ends of the inner nail 3 are respectively a head end 3a and a locking end 3b. The head end 3a of the inner nail 3 is provided with a locking hole 31 for positioning and driving the inner nail 3 by a tool (not shown). The axial rotation is generated; the locking end 3b of the inner nail 3 is provided with an external thread portion 32 for interlocking with the internal thread portion 141 of the implant 1.

According to the above structure, please refer to Figures 3 and 4, in order to perform the dental implant operation with the bone implant of the present invention, the implant 1 can be implanted into the alveolar bone of the patient's missing tooth; The elastic deformation portion 21 of the abutment body 2 is inserted into the blind hole 12 of the implant 1 until the elastic deformation portion 21 is opposite to the anti-rotation portion 131 of the implant 1; finally, the inner nail 3 is inserted into the abutment body The inner hole 24 of the inner nail 3 is engaged in the inner hole 24, and the locking end 3b of the inner nail 3 protrudes from the elastic deformation portion 21 of the support body 2, and is driven by a tool. The inner nail 3 is axially rotated to be locked and coupled to the internal thread portion 141 of the implant 1 by the external thread portion 32 of the inner nail 3, thereby firmly locking the implant 1 and the abutment body 2 The effect of the elastic deformation portion 21 on the anti-rotation portion 131 of the abutment receiving portion 13 and the small-diameter portion 221 of the connecting portion 22 are located in the abutment receiving region The guiding portion 132 of the segment 13; after the wound is healed, the crown is mounted on the prosthesis joint portion 23 of the abutment body 2 to complete the dental implant surgery.

In the process of continuously extending the elastic deformation portion 21 of the support body 2 into the blind hole 12 in the axial direction, the maximum outer diameter W2 of the elastic deformation portion 21 of the support body 2 is greater than that of the implant 1 The minimum inner diameter W1 of the anti-rotation portion 131 is such that the elastic end of the elastic deformation portion 21 of the abutment body 2 extends into the anti-rotation portion 131 of the implant 1 , and each of the elastic pieces 211 receives the inner wall surface of the anti-rotation portion 131 . The elastic deformation of the elastically deformed portion of the support body 2 can be continuously extended into the anti-rotation portion 131 of the implant body 1 until the end faces of the elastic pieces 211 abut. The first abutting surface 142 and the inclined surface 2111 of each of the elastic pieces 211 abut against the end edge of the second abutting surface 151; but during the entire axial displacement, the elastic deformation portion 21 of the abutting body 2 Each of the elastic pieces 211 and the inner wall surface of the anti-rotation portion 131 of the implant 1 can be kept in close contact with each other by the elastic restoring ability of each of the elastic pieces 211, so that the effect of the mutual clamping body 2 is achieved. Whether the free end of the elastic deformation portion 21 has protruded into the abutment stop portion 15 of the implant 1 can ensure that the abutment body 2 does not stand from the plant at any time. 1, the blind hole 12 of extrusion.

In summary, the bone implant of the present invention can be clamped between the implant and the abutment body by a simple click structure to prevent the support body from being implanted before the inner nail is locked. The effect of the prolapse in the body, and the implant and the abutment body of the bone implant of the present invention are relatively easy to manufacture, which facilitates the processing procedure and the lifting molding, compared to the conventional bone implant which can achieve this function. Yield, which can relatively reduce many manufacturing costs, to significantly increase the market competitiveness of the bone implant.

In the bone implant of the present invention, the abutment body can maintain the interlocking relationship with the implant body at any time during the process of incorporating the implant body, thereby not only improving the convenience during operation, but also ensuring effective achievement of the desired desire. Prevent the effect of the abutment body coming out of the implant.

The bone implant of the invention has a simple structure and can have better structural strength, relatively reducing the occurrence of fatigue damage, and has the effect of improving the service life.

Although the present invention has been disclosed using the above preferred embodiments, it is not intended to be limiting The present invention is not limited to the spirit and scope of the present invention, and various modifications and changes to the above embodiments are still within the technical scope of the present invention. Therefore, the scope of protection of the present invention is attached. The scope defined in the scope of application for patent application shall prevail.

Claims (6)

A bone implant comprising: an implant having an externally threaded portion between the two ends, wherein one end is provided with an axially extending blind hole for forming a table receiving section and a body inside the implant a locking section, the arranging section is provided with an anti-rotation part having a non-circular hole in a radial section of the implant and having a minimum inner diameter, the locking area a section adjacent to the closed end of the blind hole; a table body having an elastic deformation portion axially connected, a joint portion and a prosthesis joint portion, and an axially penetrating inner hole, the elastic deformation portion having an interval a plurality of elastic pieces for forming a groove between any two adjacent elastic pieces, wherein the elastic deformation portion has a maximum outer diameter width when the plurality of elastic pieces are unstressed, and the maximum outer diameter width is larger than the minimum inner diameter a diameter width, the elastic deformation portion is alignably coupled to the anti-rotation portion of the implant; and an inner nail, one end of which is positioned in the inner hole of the abutment body, and the other end is locked to the locking region of the inner portion of the implant body a segment; wherein each of the elastic pieces is provided with a slope at the free end, so that the elastic deformation portion faces Extending the outer diameter from the end; the interior of the implant forms a table stop section between the abutment receiving section and the locking section, the locking section is fixed in a radial section of the implant The inner diameter of the section is smaller than the inner diameter of the abutment stop section to form a first abutment surface for abutting the end faces of the elastic pieces; the inner diameter of the abutment stop section is smaller than the foregoing The abutment portion has a minimum inner diameter of the section to form a second abutting surface, and the inclined surface of each of the elastic pieces abuts against the end edge of the second abutting surface. The bone implant of claim 1, wherein the support portion of the implant is further provided with a guiding portion, and the anti-rotation portion of the receiving portion of the supporting portion is smaller than the guiding portion. Adjacent to the locking section of the implant, the guiding portion is expanded by abutting the anti-rotation portion toward the open end of the blind hole to form a tapered surface. The bone implant of claim 2, wherein the connecting portion of the abutment body has a small diameter portion and a large diameter portion, and the connecting portion is connected to the elastic deformation portion by the small diameter portion. And by The large diameter portion is connected to the prosthesis joint. The bone implant of claim 3, wherein the elastic deformation portion of the abutment body is opposite to the anti-rotation portion of the abutment receiving portion of the implant body, and the connection portion of the abutment body The small diameter portion is directed to the guiding portion of the abutment receiving portion of the implant, and the large diameter portion of the connecting portion of the abutting body is exposed outside the plant body. The bone implant of claim 1, wherein the anti-rotation portion has a regular polygonal hole in a radial section of the implant. The bone implant of claim 2, wherein the anti-rotation portion has a regular polygonal hole in a radial section of the implant.