Cheekbone implant and abutment

Abstract

The invention discloses a cheekbone implant and an abutment, and relates to the technical field of medical instruments.The cheekbone implant comprises a cheekbone implant body, one end of the cheekbone implant body is provided with a first threaded part, the cheekbone implant body comprises a first rod part, one side of the first rod part is provided with a neck part, one side of the neck part is provided with a second rod part, and the second rod part is provided with a second threaded part; the inner side of the second rod part is provided with a first connecting part, the inner side of the first connecting part is provided with an abutment, the cheekbone implant is a main body of the whole device, is fixed in the cheekbone and is used for providing a stable supporting foundation, the first rod part is used as a transition structure between the first threaded part and the neck part, and the second rod part and the first connecting part are used for positioning and fixing the abutment. The base station is used for containing the base station screw, tight connection between the base station and the cheekbone implant is achieved, the cheekbone implant is anchored in the cheekbone through the thread, fixation of the implant is achieved, the postoperative infection risk is reduced, and a better treatment effect can be provided for a patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and specifically to a zygomatic implant and abutment. Background Art

[0002] At present, for patients with severe resorption or loss of the maxillary alveolar bone, traditional dental implant methods are difficult to implement due to the lack of sufficient bone mass. As an alternative solution, zygomatic implants can achieve implant restoration by being anchored to the zygomatic bone. However, most existing zygomatic implants have complex structures, and usually have thick threads and reinforcement structures at the proximal end, which are likely to cause soft tissue compression and cutting, affecting healing and attachment. At the same time, when the gingival penetration height of the abutment is relatively high, its screw hole often penetrates through the side wall of the abutment, which not only affects aesthetics, but also easily causes food residue and microbial growth, leading to biological complications such as infection.

[0003] The prior art CN111867513B discloses an asymmetric zygomatic dental implant with local microthreads / grooves. The technical solution discloses that "the zygomatic dental implant includes a generally cylindrical body, an internal threaded hole, and asymmetric external features. The generally cylindrical body has a coronal portion and a top portion. The generally cylindrical body has a main central axis. The internal threaded hole is formed in the coronal portion of the generally cylindrical body for receiving a screw of a base configured to removably hold and engage with the zygomatic dental implant. The internal threaded hole has a hole central axis. The asymmetric external features are located on at least a part of the first side of the generally cylindrical body, such that the asymmetric external features are configured to directly engage the patient's alveolar bone. The asymmetric external features include a plurality of circumferentially extending grooves." Although the prior art has disclosed an asymmetric zygomatic dental implant with local microthreads / grooves, there are still some deficiencies. Specifically, in the actual use process, if the zygomatic implant is applied to the situation where there is no bone mass at the proximal end, its thread design will cut the soft tissue, and the thickened design at the proximal end will also squeeze the soft tissue, which is not conducive to the attachment of the soft tissue. As the gingival penetration height of the abutment increases, its screw channel will penetrate through the side of the abutment, and the presence of screw holes in the side wall of the abutment is likely to cause food and microorganisms to remain, thus generating a series of biological problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a zygomatic implant and abutment to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: A zygomatic implant and abutment, including a zygomatic implant. One end of the zygomatic implant is provided with a first threaded portion. The zygomatic implant includes a first rod portion. One side of the first rod portion is provided with a neck. One side of the neck is provided with a second rod portion. Inside the second rod portion is provided with a first connecting portion. Inside the first connecting portion is provided with an abutment. The zygomatic implant is the main body of the whole device, fixed in the zygomatic bone, used to provide a stable support foundation. The first rod portion serves as a transition structure between the first threaded portion and the neck, playing a role in force transmission and buffering, while ensuring the overall rigidity and bending resistance of the zygomatic implant after implantation. The second rod portion and the first connecting portion are used to position and fix the abutment. The abutment is used to accommodate the abutment screw to achieve a tight connection between the abutment and the zygomatic implant. The whole abutment is a split structure, avoiding the penetration of the abutment screw hole through the side wall of the abutment, and effectively preventing food residues and microorganisms from entering the screw channel.

[0006] The first threaded portion includes a threaded part. One side of the threaded part is provided with a blunt-shaped part. The major diameter of the thread of the threaded part is a constant diameter. The minor diameter of the thread of the threaded part gradually increases from the distal end to the proximal end. The threaded part is used to provide a supporting force. The minor diameter of the thread gradually increases from the distal end to the proximal end. This progressive design can achieve gradually enhanced stability and reduce the implantation resistance. The blunt-shaped part is used to prevent the zygomatic implant from cutting the soft tissue on the outer side of the zygomatic bone when implanted too deeply.

[0007] The cross-sectional area of the neck is smaller than that of the first rod portion. The first connecting portion includes a tapered portion. One side of the tapered portion is provided with a first anti-rotation portion. One side of the first anti-rotation portion is provided with a second threaded portion. The first anti-rotation portion and the second threaded portion are located on the inner wall of the first connecting portion. The neck contacts the soft tissue, used to reduce the compression on the soft tissue, enhance the soft tissue attachment, effectively prevent the transfer of microorganisms towards the bone end of the zygomatic implant, thereby reducing the infection risk. The tapered portion is used to support and fix the abutment. The second threaded portion is connected to a third threaded portion, used to fixedly connect the abutment body and the zygomatic implant.

[0008] The surface of the zygomatic implant is a smooth surface, and the surface roughness Ra of the zygomatic implant ≤ 3.2um. The surface of the zygomatic implant is smooth and does not cut the soft tissue, which is especially suitable for patients with severe absorption of the maxillary alveolar bone and no bone at the proximal end.

[0009] The abutment includes an abutment body provided with an external thread thereon. The abutment body is connected to the first connecting part. A connecting head is installed at one end of the abutment body. An abutment screw is arranged inside the abutment body. The abutment body includes a second conical part, and an anti-rotation part two is arranged on the other side of the second conical part. A first hole, a second hole and a third hole are formed inside the second conical part. The first hole is located on the side close to the external thread, and the second hole and the third hole are arranged in sequence below the first hole. The anti-rotation part one is connected to the anti-rotation part two. The included angle between the axis of the external thread and the axis of the second conical part is α1, and the included angle α1 is 40-60°. The anti-rotation part one and the anti-rotation part two cooperate to prevent the abutment body from rotating along the axis of the zygomatic implant. The first hole is used to accommodate the cap head, the second hole is used to block the axial movement of the cap head along the zygomatic implant, so as to fix the cap head in the zygomatic implant, and the third hole is used to accommodate the third threaded part.

[0010] The connecting head includes a first conical part, a second connecting part is arranged on one side of the first conical part, several non-conical parts are arranged on the first conical part, a first connecting thread is formed inside the first conical part, and a second connecting thread is formed inside the second connecting part. The second connecting thread is threadedly connected to the external thread. The abutment screw includes a rod part, a cap head is arranged at one end of the rod part, a rotating part is arranged at the upper end of the cap head, and a third threaded part is arranged at the other end of the rod part. The external thread is connected to the second connecting thread to fixedly connect the connecting head and the abutment body. The non-conical part is used to rotate the connecting head so as to install the connecting head on the abutment body. The abutment screw is used to fix the abutment body and the zygomatic implant. The first conical part and the first connecting thread are used to connect with restorations such as a bridge.

[0011] The abutment includes a first cone, a second cone and a transition part. The first cone and the second cone are connected through the transition part. A platform is arranged at the connection between the first cone and the transition part. A threaded hole is formed at the center of the end face of the first cone. The axis of the threaded hole and the axis of the first cone are on the same straight line. The included angle between the axis of the threaded hole and the axis of the second cone is α2, and the included angle α2 is 40-60°. There is no screw hole on the side wall of the abutment, effectively preventing biological complications caused by the retention of food and microorganisms. The conical part cooperates with the second cone to fix the abutment and the zygomatic implant. The transition part is used for the transition and connection between the first cone and the second cone.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The zygomatic implant of the present invention is fixed in the zygomatic bone through a threaded anchor. The end of the thread is designed to be blunt to prevent the implant from cutting the soft tissue on the outer side of the zygomatic bone when implanted too deeply. Except for the part anchored in the zygomatic bone, the rest has no sharp edges and is a smooth surface, which does not cut the soft tissue, and is particularly suitable for patients with severe absorption of the maxillary alveolar bone and no bone at the proximal end.

[0013] 2. The present invention adopts a proximal neck narrowing design, which does not squeeze soft tissues and allows more soft tissues to attach, effectively preventing the transfer of microorganisms to the bone end of the implant. The split abutment design avoids the penetration of the abutment screw hole through the side wall of the abutment, effectively preventing biological complications caused by the retention of food and microorganisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a cross-section of the present invention Figure I ; Figure 2 is a cross-section of the present invention Figure II ; Figure 3 is a three-dimensional view of the zygomatic implant of the present invention; Figure 4 is a three-dimensional view of the abutment body of the present invention; Figure 5 is a cross-sectional view of the abutment body of the present invention; Figure 6 is a three-dimensional view of the connecting head of the present invention; Figure 7 is a cross-sectional view of the connecting cylinder of the present invention; Figure 8 is a three-dimensional view of the abutment screw of the present invention; Figure 9 is a three-dimensional view of the abutment of the present invention; Figure 10 is a cross-sectional view of the abutment of the present invention.

[0015] In the figure: 1. Zygomatic implant; 2. First threaded part; 3. Rounded part; 4. Threaded part; 5. First rod part; 6. Neck; 7. Second rod part; 8. First connecting part; 9. Tapered part; 10. First anti-rotation part; 11. Second threaded part; 12. Abutment; 13. Connecting head; 14. First conical part; 15. Non-conical part; 16. Second connecting part; 17. First connecting thread; 18. Second connecting thread; 19. Abutment body; 20. External thread; 21. Second conical part; 22. Second anti-rotation part; 23. First hole; 24. Second hole; 25. Third hole; 26. Abutment screw; 27. Cap head; 28. Rod part; 29. Third threaded part; 30. Rotating part; 31. First cone; 32. Second cone; 33. Transition part; 34. Platform; 35. Threaded hole. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figures 1 - 10 , the present invention provides a technical solution: a zygomatic implant and abutment, including a zygomatic implant 1. One end of the zygomatic implant 1 is provided with a first threaded portion 2. The zygomatic implant 1 includes a first rod portion 5. One side of the first rod portion 5 is provided with a neck portion 6. One side of the neck portion 6 is provided with a second rod portion 7. An inner side of the second rod portion 7 is provided with a first connecting portion 8. An inner side of the first connecting portion 8 is provided with an abutment 12. The zygomatic implant 1 is the main body of the whole device, fixed in the zygomatic bone, used to provide a stable support foundation. The first rod portion 5 serves as a transition structure between the first threaded portion 2 and the neck portion 6, playing a role in force transmission and buffering, and at the same time ensuring the overall rigidity and bending resistance of the zygomatic implant 1 after implantation. The second rod portion 7 and the first connecting portion 8 are used to position and fix the abutment 12. The abutment 12 is used to accommodate the abutment screw 26 to achieve a tight connection between the abutment 12 and the zygomatic implant 1. The whole abutment 12 is a split structure, avoiding the penetration of the abutment screw hole through the side wall of the abutment, and effectively preventing food residues and microorganisms from entering the screw channel.

[0018] The first threaded portion 2 includes a threaded part 4. One side of the threaded part 4 is provided with a blunt-round part 3. The major diameter of the thread of the threaded part 4 is a constant diameter, and the minor diameter of the thread of the threaded part 4 gradually increases from the distal end to the proximal end. The threaded part 4 is used to provide support force. The minor diameter of the thread gradually increases from the distal end to the proximal end. This progressive design can achieve gradually enhanced stability and reduce the implantation resistance. The blunt-round part 3 is used to prevent the zygomatic implant 1 from cutting the soft tissue on the outer side of the zygomatic bone when implanted too deeply.

[0019] The cross-sectional area of the neck portion 6 is smaller than the cross-sectional area of the first rod portion 5. The first connecting portion 8 includes a tapered portion 9. One side of the tapered portion 9 is provided with a first anti-rotation portion 10. One side of the first anti-rotation portion 10 is provided with a second threaded portion 11. The first anti-rotation portion 10 and the second threaded portion 11 are located on the inner wall of the first connecting portion 8. The neck portion 6 contacts the soft tissue, used to reduce the compression on the soft tissue, enhance the soft tissue attachment, and effectively prevent the transfer of microorganisms towards the bone end direction of the zygomatic implant 1, thereby reducing the infection risk. The tapered portion 9 is used to support and fix the abutment 12. The second threaded portion 11 is connected to the third threaded portion 29, used to fixedly connect the abutment main body 19 and the zygomatic implant 1.

[0020] The surface of the zygomatic implant 1 is a smooth surface, and the surface roughness Ra of the zygomatic implant 1 is ≤ 3.2 um. The surface of the zygomatic implant 1 is smooth and does not cut soft tissues, which is particularly suitable for patients with severe resorption of the maxillary alveolar bone and no bone at the proximal end. Embodiment

[0021] The abutment 12 includes an abutment body 19. An external thread 20 is provided on the abutment body 19. The abutment body 19 is connected to the first connecting portion 8. A connecting head 13 is installed at one end of the abutment body 19. A abutment screw 26 is arranged inside the abutment body 19. The abutment body 19 includes a second conical portion 21. The external thread 20 is located on one side of the second conical portion 21. An anti-rotation portion 22 is provided on the other side of the second conical portion 21. A first hole 23, a second hole 24 and a third hole 25 are formed inside the second conical portion 21. The first hole 23 is located on the side close to the external thread 20. The second hole 24 and the third hole 25 are arranged in sequence below the first hole 23. The anti-rotation portion 10 is connected to the anti-rotation portion 22. The axis of the external thread 20 forms an angle α1 with the axis of the second conical portion 21, and the angle α1 is 40 - 60°. The anti-rotation portion 10 and the anti-rotation portion 22 cooperate to prevent the abutment body 19 from rotating along the axis of the zygomatic implant 1. The first hole 23 is used to accommodate the cap head 27. The second hole 24 is used to block the axial movement of the cap head 27 along the zygomatic implant 1, so as to fix the cap head 27 in the zygomatic implant 1. The third hole 25 is used to accommodate the threaded portion 29.

[0022] The connecting head 13 includes a first conical portion 14. A second connecting portion 16 is provided on one side of the first conical portion 14. Several non-conical portions 15 are provided on the first conical portion 14. A first connecting thread 17 is formed inside the first conical portion 14. A second connecting thread 18 is formed inside the second connecting portion 16. The second connecting thread 18 is in threaded connection with the external thread 20. The abutment screw 26 includes a rod portion 28. A cap head 27 is provided at one end of the rod portion 28. A rotating portion 30 is provided at the upper end of the cap head 27. A threaded portion 29 is provided at the other end of the rod portion 28. The external thread 20 is connected to the second connecting thread 18 to connect and fix the connecting head 13 and the abutment body 19. The non-conical portions 15 are used to rotate the connecting head 13, so as to install the connecting head 13 on the abutment body 19. The abutment screw 26 is used to fix the abutment body 19 and the zygomatic implant 1. The first conical portion 14 and the first connecting thread 17 are used to connect and repair with a bridge or the like. Embodiment

[0023] The abutment 12 includes a first cone 31, a second cone 32 and a transition portion 33. The first cone 31 and the second cone 32 are connected by the transition portion 33. A platform 34 is provided at the connection between the first cone 31 and the transition portion 33. A threaded hole 35 is opened at the center of the end face of the first cone 31. The axis of the threaded hole 35 and the axis of the first cone 31 are on the same straight line. The included angle between the axis of the threaded hole 35 and the axis of the second cone 32 is α2, and the included angle α2 is 40 - 60°. There are no screw holes on the side wall of the abutment 12, effectively preventing biological complications caused by the retention of food and microorganisms. The tapered portion 9 cooperates with the second cone 32 to fix the abutment 12 to the zygomatic implant 1. The transition portion 33 is used for the transition and connection between the first cone 31 and the second cone 32.

[0024] The working principle of the present invention: When the implant is in use, medical staff fix the zygomatic implant 1 in the zygoma through the first threaded portion 2, then fix the abutment body 19 to the zygomatic implant 1 through the second conical portion 21, and then fix the abutment body 19 through the cooperation of the second connecting thread 18 and the external thread 20. The abutment screw 26 passes through the third hole 25 inside the abutment body 19 and locks with the second threaded portion 11 inside the zygomatic implant. The cap head 27 is limited by the second hole 24 to prevent loosening. Finally, the restoration structure can be connected to a denture restoration component such as a bridge through the first conical portion 14 of the connecting head 13 to achieve the restoration of dental function.

[0025] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A zygomatic implant and abutment, characterized in that: Comprising a zygomatic implant (1), one end of the zygomatic implant (1) is provided with a first thread portion (2), the zygomatic implant (1) includes a first rod portion (5), one side of the first rod portion (5) is provided with a neck (6), one side of the neck (6) is provided with a second rod portion (7), the inner side of the second rod portion (7) is provided with a first connecting portion (8), and the inner side of the first connecting portion (8) is provided with a abutment (12).

2. The zygomatic implant and abutment according to claim 1, characterized in that: The first thread portion (2) includes a thread part (4), one side of the thread part (4) is provided with a blunt-shaped part (3), the major diameter of the thread of the thread part (4) is a constant diameter, and the minor diameter of the thread of the thread part (4) gradually increases from the distal end to the proximal end.

3. The zygomatic implant and abutment according to claim 2, characterized in that: The cross-sectional area of the neck (6) is smaller than the cross-sectional area of the first rod portion (5), the first connecting portion (8) includes a tapered portion (9), one side of the tapered portion (9) is provided with a first anti-rotation portion (10), one side of the first anti-rotation portion (10) is provided with a second thread portion (11), and the first anti-rotation portion (10) and the second thread portion (11) are located on the inner wall of the first connecting portion (8).

4. A zygomatic implant and abutment according to claim 2, characterized in that: The surface of the zygomatic implant (1) is a smooth surface, and the surface roughness Ra of the zygomatic implant (1) is ≤ 3.2um.

5. A zygomatic implant and abutment according to claim 1, characterized in that: The abutment (12) includes an abutment body (19), an external thread (20) is provided on the abutment body (19), the abutment body (19) is connected to the first connecting portion (8), a connecting head (13) is installed at one end of the abutment body (19), a abutment screw (26) is arranged inside the abutment body (19), the abutment body (19) includes a second conical portion (21), the other side of the second conical portion (21) is provided with a second anti-rotation portion (22), a first hole (23), a second hole (24) and a third hole (25) are formed inside the second conical portion (21), the first hole (23) is located on the side close to the external thread (20), the second hole (24) and the third hole (25) are arranged in sequence below the first hole (23), the first anti-rotation portion (10) is connected to the second anti-rotation portion (22), and the included angle α1 between the axis of the external thread (20) and the axis of the second conical portion (21) is 40-60°.

6. A zygomatic implant and abutment according to claim 5, characterized in that: The connecting head (13) includes a first conical portion (14), one side of the first conical portion (14) is provided with a second connecting portion (16), several non-conical portions (15) are provided on the first conical portion (14), a first connecting thread (17) is formed inside the first conical portion (14), a second connecting thread (18) is formed inside the second connecting portion (16), the second connecting thread (18) is in threaded connection with the external thread (20), the abutment screw (26) includes a rod portion (28), a cap head (27) is arranged at one end of the rod portion (28), a rotating portion (30) is arranged at the upper end of the cap head (27), and a third thread portion (29) is arranged at the other end of the rod portion (28).

7. A zygomatic implant and abutment according to claim 1, characterized in that: The abutment (12) includes a first cone (31), a second cone (32) and a transition portion (33). The first cone (31) is connected to the second cone (32) through the transition portion (33). A platform (34) is provided at the connection between the first cone (31) and the transition portion (33). A threaded hole (35) is formed at the center of the end face of the first cone (31). The axis of the threaded hole (35) is on the same straight line as the axis of the first cone (31). The included angle between the axis of the threaded hole (35) and the axis of the second cone (32) is α2, and the included angle α2 is 40 - 60°.

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