CN111743666A

CN111743666A - Implanted finger joint prosthesis

Info

Publication number: CN111743666A
Application number: CN202010653139.1A
Authority: CN
Inventors: 蒋鹏
Original assignee: Beijing Zhong An Tai Hua Science & Technology Co ltd
Current assignee: Beijing Zhong An Tai Hua Science & Technology Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2020-10-09

Abstract

The application relates to an implanted finger joint prosthesis, which relates to the technical field of medical prosthesis and comprises a first fixing body, a ball head, a ball socket and a second fixing body which are sequentially connected; the first fixing body is provided with a first fixing end and a second fixing end, a first matching surface is arranged between the first fixing end and the second fixing end, and a first grain bulge is arranged on the first matching surface; the ball head is connected with the second fixed end, and a convex spherical surface is arranged outside the ball head; the second fixing body is provided with a third fixing end and a fourth fixing end, a second matching surface is arranged between the third fixing end and the fourth fixing end, and the second matching surface is provided with second texture bulges; the ball socket is connected with the third fixed end through a locking structure, an inner concave spherical surface is arranged at one end of the ball socket, and the ball head is connected with the ball socket. The technical problems that the connection of a finger joint prosthesis and a human phalanx is complex and is easy to loosen in the prior art can be solved, and the effect of ensuring the stability of the prosthesis in the initial stage and the middle and long periods is achieved.

Description

Implanted finger joint prosthesis

Technical Field

The application relates to the technical field of medical prostheses in medical technology, in particular to an implanted finger joint prosthesis.

Background

With the progress and development of medical technology, more and more artificial joints are used in orthopedic surgery, and for patients with hand joint injury, artificial joint replacement is a better treatment method. If the training is early and the method is proper after the operation, the effect is better; in addition, compared with joint arthroplasty and joint free grafting, the artificial joint has larger mobility, and the prosthesis replacement can not cause damage to other parts.

In recent years, with the continuous improvement of artificial joint design, three new concepts of anatomical shape design, osseointegration and high and new technology materials are fused, the problems of joint aging, loosening, collapse and the like are gradually improved, and the effect of artificial joint replacement is better and better; not only does post-operative loss of swelling, pain and deformity of the original joint occur, but the improvement in joint mobility is greatest in these operations. For patients with ligament damage to the artificial interphalangeal joint, the stability of the joint may not be affected after prosthesis replacement.

At present, the finger joint prosthesis needs to be matched with a medullary cavity, the finger joint prosthesis and the operation technology of human phalanges are pressed and pressed into the medullary cavity through the prosthesis after being processed by a reamer or a file in the early stage, the finger joint prosthesis and the operation technology of the human phalanges are small, the finger joint prosthesis and the operation technology of the human phalanges are greatly challenged to the technology of doctors when the finger joint prosthesis and the prosthesis are processed, the finger joint prosthesis is not well processed, the finger joint fracture and the prosthesis are not easy to loosen, and the operation technology requirement of the doctors is high.

In view of the above-mentioned related technologies, the inventor considers that the connection between the finger joint prosthesis and the human phalanx is complex, and the requirements on the doctor technology are high, and the loosening is easy to occur.

Disclosure of Invention

In order to solve the problems that the connection between the finger joint prosthesis and a human phalanx is complex, the requirement on the doctor technology is high, and looseness is prone to occurring, the application provides the implant type finger joint prosthesis.

The application provides an implanted finger joint prosthesis, adopts following technical scheme:

an implant type finger joint prosthesis comprises a first fixing body, a ball head, a ball socket and a second fixing body which are sequentially connected; the first fixing body is provided with a first fixing end and a second fixing end which are far away from each other, a first matching surface used for being connected with a phalanx of a human body is arranged between the first fixing end and the second fixing end, and a plurality of spiral first line bulges are arranged on the first matching surface; the ball head is connected with the second fixed end, and a convex spherical surface is arranged outside the ball head; the second fixing body is provided with a third fixing end and a fourth fixing end which are far away from each other, a second matching surface used for being connected with a phalanx of a human body is arranged between the third fixing end and the fourth fixing end, and a plurality of spiral second line bulges are arranged on the second matching surface; the ball socket is connected with the third fixed end through a locking structure, an inner concave spherical surface is arranged at one end of the ball socket, and the ball head is connected with the ball socket through the cooperation of the outer convex spherical surface and the inner concave spherical surface.

Through adopting above-mentioned technical scheme, first fixed body and second fixed body are used for inserting the downthehole of seting up in the human phalanx, first fixed body mainly is connected with human phalanx contact through first fitting surface, the second fixed body mainly is connected with human phalanx contact through the second fitting surface, the bulb forms articular movable surface with the fitting surface of ball socket promptly, first fixed body is connected with the bulb through the second stiff end, the second fixed body is connected with the ball socket through the third stiff end, and it is fixed through the locking structure locking, first fixed body, the bulb, ball socket and second fixed body connect gradually in proper order, human knuckle structure has been constituted jointly. Among the above-mentioned scheme, carry out roughening treatment to the surface of the fixed body of first fixed body and second, it is concrete, it is protruding to be equipped with a plurality of spiral helicine first lines at the surface of first fitting surface, and it is protruding to be provided with a plurality of spiral helicine second lines on the surface of second fitting surface, the protruding roughness that can increase the surface of above-mentioned first line and second line, it is more firm to make first fixed body and the fixed body of second be connected with human finger bone, the initial regulation is more stable, the high roughness of surface can be that human finger bone obtains better bone ingrowth ability and bone crawl ability, thereby make this finger joint prosthesis can reach the purpose of long-term firm fixing, the life of extension prosthesis.

Preferably, the first texture protrusion and the second texture protrusion are external threads.

Through adopting above-mentioned technical scheme, first fixed body and second fixed body surface are helicitic texture, and first fixed body and second fixed body can be more convenient twist into human finger bone in, installation convenient operation, and it is more convenient to operate, is favorable to improving work efficiency, and is lower to doctor's operation technique's dependence.

Preferably, the second fixed end is a cone frustum with a taper on the outer surface, the ball head is provided with a ball head conical hole matched with the cone frustum in an inserting mode, and the diameter of the second fixed end close to one end of the ball head is smaller than the diameter of the second fixed end far away from one end of the ball head.

Through adopting above-mentioned technical scheme, second stiff end adopts taper fit with the bulb, and it is more convenient to install, and cooperation crimping is more firm between the conical surface, operation easy operation.

Preferably, a first screwing hole is formed in the end face, close to one end of the ball head, of the second fixing end, and the first screwing hole is an inner polygonal hole.

Through adopting above-mentioned technical scheme, during the installation, through for example spanner and the cooperation of pegging graft of first running-on hole with the help of outside instrument, twist into human finger bone with first fixed body in, it is more convenient, laborsaving to operate, is favorable to improving work efficiency.

Preferably, the third fixed end is a cone frustum with a taper on the outer surface, the ball socket is provided with a ball socket conical hole in plug-in fit with the cone frustum, and the diameter of the third fixed end close to one end of the ball socket is smaller than the diameter of the end far away from the ball head.

Through adopting above-mentioned technical scheme, third stiff end and ball socket adopt taper fit, and it is more convenient to install, and cooperation crimping is more firm between the conical surface, operation easy operation.

Preferably, a second screwing hole is formed in the end face, close to one end of the ball socket, of the third fixing end, and the second screwing hole is an inner polygonal hole.

Through adopting above-mentioned technical scheme, during the installation, twist into human finger bone with the second stationary body through twisting the grafting cooperation with the help of outside instrument for example spanner and second, it is more convenient, laborsaving to operate, is favorable to improving work efficiency.

Preferably, the locking structure comprises a clamp ring arranged on the outer surface of the third fixing end and a clamping groove arranged on the inner surface of the ball socket conical hole, the clamp ring is elastic, and the clamp ring is in clamping fit with the clamping groove.

Through adopting above-mentioned technical scheme, the snap ring joint makes second fixed body more firm reliable with the ball socket is fixed in the draw-in groove, guarantees the reliability in the prosthesis use, and structural design is simple, connects the convenience.

Preferably, the first stiff end with the cone that the fourth stiff end is, the diameter that is close to the one end of second stiff end of first stiff end is greater than the diameter of the free end of first stiff end, being close to of fourth stiff end the diameter of the one end of third stiff end is greater than the diameter of the free end of fourth stiff end, the cone is the solid of revolution of parabola for the generating line.

Through adopting above-mentioned technical scheme, be the solid of revolution of parabola with the cone design for the generating line, adopt the transition design of parabola, have fine guide effect, make first stationary body and second stationary body can make things convenient for more, swift implantation indicate the marrow intracavity, operate simpler, improve the installation accuracy, improve work efficiency.

Preferably, the ball socket is a cone with a taper on the outer surface, and the diameter of one end of the ball socket, which is provided with the concave spherical surface, is larger than the diameter of one end connected with the second fixing body.

By adopting the technical scheme, the smooth transition of the outer surface of the ball socket to the outer surface of the second fixing body is realized, the whole consistency of the outer surface of the prosthesis is favorably improved, the abrasion resistance and the biocompatibility of the connection between the prosthesis and the phalanges of a human body are improved, and the fitting is comfortable.

Preferably, the first fixing body and the second fixing body are made of Ti6Al4V, the ball head is made of CoCrMo, and the ball socket is made of ultra-high molecular weight polyethylene.

By adopting the technical scheme, the first fixing body and the second fixing body are made of metal, the friction joint surface of the metal to the polyethylene reduces the abrasion and the generation of friction particles, and the joint prosthesis implanted into the body has good abrasion resistance and biocompatibility.

Drawings

FIG. 1 is a schematic structural diagram of an implanted finger joint prosthesis provided in an embodiment of the present application;

fig. 2 is an exploded view of fig. 1.

In the figure: 1. a first fixed body; 11. a second fixed end; 12. a first mating surface; 121. a first line projection; 13. a first fixed end; 131. a first fixed end bus; 14. a first screw hole; 2. a ball head; 21. a convex spherical surface; 22. a ball head conical hole; 3. a ball socket; 31. an inner concave spherical surface; 32. a ball and socket conical bore; 33. a ball and socket bus; 4. a second fixed body; 41. a third fixed end; 42. a second mating surface; 421. a second line projection; 43. a fourth fixed end; 431. a fourth fixed end bus; 44. a second screw hole; 5. a locking structure; 51. a snap ring; 52. a clamping groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

Referring to fig. 1, an implanted finger joint prosthesis disclosed in an embodiment of the present application includes a first fixing body 1, a ball head 2, a ball socket 3, and a second fixing body 4, which are sequentially connected; the first fixing body 1 is provided with a first fixing end 13 and a second fixing end 11 which are far away from each other, a first matching surface 12 used for being connected with a phalanx of a human body is arranged between the first fixing end 13 and the second fixing end 11, and a plurality of spiral first line bulges 121 are arranged on the first matching surface 12; the bulb 2 is connected with the second fixed end 11, and a convex spherical surface 21 is arranged outside the bulb 2; the second fixing body 4 is provided with a third fixing end 41 and a fourth fixing end 43 which are far away from each other, a second matching surface 42 used for being connected with a phalanx of a human body is arranged between the third fixing end 41 and the fourth fixing end 43, and a plurality of spiral second line bulges 421 are arranged on the second matching surface 42; the ball socket 3 is connected with the third fixed end 41 through the locking structure 5, one end of the ball socket is provided with an inner concave spherical surface 31, and the ball head 2 and the ball socket 3 are connected through the matching of the outer convex spherical surface 21 and the inner concave spherical surface 31.

Specifically, the first fixing body 1 and the second fixing body 4 are cylinders, the first matching surface 12 is an outer cylindrical surface of the first fixing body 1, and a spiral first grain protrusion 121 is arranged on the outer cylindrical surface; the second fitting surface 42 is an outer cylindrical surface of the second fixing body 4, and a spiral second line protrusion 421 is arranged on the outer cylindrical surface; the outer part of the ball head 2 is spherical, one end connected with the first fixing body 1 is provided with an end surface for connection, and one side connected with the ball socket 3 is an outer convex spherical surface 21; the ball socket 3 is a cylinder, one end of which is provided with an inner concave spherical surface 31, and the other end of which is connected with a third fixed end 41 of the second fixed body 4 through a locking structure.

When the prosthesis of this embodiment is implanted, firstly, a mounting hole needs to be formed in a human phalanx, the first fixing body 1 and the second fixing body 4 are used for being inserted into the mounting hole formed in the human phalanx, the first fixing body 1 is mainly in contact connection with the human phalanx through the first matching surface 12, the second fixing body 4 is mainly in contact connection with the human phalanx through the second matching surface 42, the matching surfaces of the ball head 2 and the ball socket 3, namely the outer convex spherical surface 21 and the inner concave spherical surface 31, are matched to form a movable surface of a joint, the first fixing body 1 is connected with the ball head 2 through the second fixing end 11, the second fixing body 4 is connected with the ball socket 3 through the third fixing end 41, and is locked and fixed through the locking structure 5, and the first fixing body 1, the ball head 2, the ball socket 3 and the second fixing body 4 are sequentially connected in sequence, so as to jointly form a finger. In the above-mentioned scheme, carry out roughening treatment to the surface of first fixed body 1 and the fixed body 4 of second, it is concrete, be equipped with the protruding 121 of a plurality of spiral helices first line on the surface of first fitting surface 12, and be provided with the protruding 421 of a plurality of spiral helices second line on the surface of second fitting surface 42, the protruding 121 of above-mentioned first line and the protruding 421 roughness that can increase the surface of second line, it is more firm to make first fixed body 1 and the fixed body 4 of second be connected with human phalanx, initial regulation is more stable, the high roughness of surface can be that human phalanx obtains better bone and grow into ability and bone crawling ability, thereby make this finger joint prosthesis can reach the firm fixed purpose in long term, the life of extension prosthesis.

The design of the implanted finger joint prosthesis improves the problems that the connection of the finger joint prosthesis and a human phalanx is complex, the requirement on the doctor technology is high and the finger joint prosthesis is easy to loosen, can achieve the technical effects of ensuring the initial and medium-long-term stability of the prosthesis, having low requirement on the doctor operation technology and greatly reducing the failure rate of the operation, and provides more choices for the doctor in the clinical operation.

Referring to fig. 2, as a specific embodiment of the implantable finger joint prosthesis provided in the present application, the first texture protrusions 121 and the second texture protrusions 421 are external threads, and the outer surfaces of the first matching surface 12, the first texture protrusions 121, the second matching surface 42, and the second texture protrusions 421 are all provided with a coating, and the coating is designed to increase the surface roughness of the outer surfaces of the first matching surface 12, the first texture protrusions 121, the second matching surface 42, and the second texture protrusions 421, so that the friction force after the joint is combined with the bone bed of the finger joint is increased, the initial fixing effect is good, the coating has a certain pore structure, thereby facilitating bone ingrowth and achieving a long-term fixing effect.

In this embodiment, the first texture protrusions 121 and the second texture protrusions 421 adopt the structural design of external threads, so that the first fixing body 1 and the second fixing body 4 can be screwed into the phalanx of a human body more conveniently, the mounting and the operation are convenient, the operation is more convenient, the work efficiency is improved, and the dependence on the operation technology of a doctor is lower.

Referring to fig. 2, as a specific embodiment of the implantable knuckle prosthesis provided by the present application, the second fixing end 11 is a truncated cone with a taper on the outer surface, the ball head 2 is provided with a ball head conical hole 22 in plug-in fit with the truncated cone, and the diameter of the second fixing end 11 near the end of the ball head 2 is smaller than the diameter of the end far from the ball head 2; the third fixing end 41 is a conical frustum with a taper on the outer surface, the ball socket 3 is provided with a ball socket conical hole 32 in plug fit with the conical frustum, the diameter of the end, close to the ball socket 3, of the third fixing end 41 is smaller than that of the end far away from the ball head 2, and the ball head conical hole 22 and the ball socket conical hole 32 are conical holes.

In the embodiment, the second fixed end is in taper fit with the ball head, and the third fixed end is in taper fit with the ball socket, so that the mounting is more convenient, the matching and compression between conical surfaces are firmer, and the operation is simpler.

Referring to fig. 2, as a specific embodiment of the implant-type finger joint prosthesis provided by the present application, a first connection hole 14 is formed in an end surface of the second fixing end 11 close to one end of the ball head 2, and the first connection hole 14 is an inner polygonal hole; the end surface of the third fixed end 41 close to one end of the ball socket 3 is provided with a second screwing hole 44, and the second screwing hole 44 is an inner polygonal hole.

When the finger joint fixing device is installed, the first fixing body 1 and the second fixing body 4 are screwed into the finger bones of a human body through the insertion and matching of an external tool such as a wrench and the first screwing hole 14 and the second screwing hole 44, so that the finger joint fixing device is more convenient and labor-saving to operate and is beneficial to improving the working efficiency.

Referring to fig. 2, as an embodiment of the implantable finger joint prosthesis provided by the present application, the locking structure 5 includes a snap ring 51 disposed on an outer surface of the third fixing end 41 and a locking groove 52 disposed on an inner surface of the ball socket conical hole 32, the snap ring 51 is provided with elasticity, and the snap ring 51 is in locking engagement with the locking groove 52.

In this embodiment, the snap ring 51 is clamped in the snap groove 52, so that the second fixing body 4 and the ball socket 3 are fixed more firmly and reliably, the reliability of the prosthesis in the using process is ensured, the structural design is simple, and the connection is convenient.

Referring to fig. 2, as an embodiment of the implantable knuckle prosthesis provided in the present application, the first fixing end 13 and the fourth fixing end 43 are cones, a diameter of an end of the first fixing end 13 close to the second fixing end 11 is larger than a diameter of a free end of the first fixing end 13, a diameter of an end of the fourth fixing end 43 close to the third fixing end 41 is larger than a diameter of a free end of the fourth fixing end 43, the cone is a solid of revolution with a parabolic generatrix, the generatrix of the first fixing end 13 is a first fixing end generatrix 131, and the generatrix of the fourth fixing end 43 is a fourth fixing end generatrix 431.

The cone is designed into a revolving body with a parabola-shaped bus in the embodiment, the transition design of the parabola is adopted, and the cone has a good guiding effect, so that the first fixing body 1 and the second fixing body 4 can be implanted into the finger marrow cavity more conveniently and quickly, the operation is simpler, the installation accuracy is improved, and the working efficiency is improved.

Referring to fig. 2, as a specific embodiment of the implantable knuckle prosthesis provided by the present application, the ball socket 3 is a cone whose outer surface is tapered, the diameter of the end of the ball socket 3 having the concave spherical surface 31 is larger than the diameter of the end connected to the second fixing body 4, the cone is a solid of revolution whose generatrix is an arc, and the generatrix of the ball socket 3 is a ball socket generatrix 33, that is, the outer surface of the cone is designed as a curved surface, which is beneficial to reducing friction between the ball socket 3 and the flesh and muscle of the human body, and the joint movement is more flexible and improves comfort.

The design of this embodiment has realized the gentle transition of the outer surface of ball socket 3 to second stationary body 4 outer surface, is favorable to improving the whole uniformity of prosthesis outer surface, improves the wearability and the biocompatibility that the prosthesis is connected with human phalanx, makes the cooperation comfortable.

As a specific embodiment of the implantable finger joint prosthesis provided by the present application, the first fixing body 1 and the second fixing body 4 are made of Ti6Al4V, the ball head 2 is made of CoCrMo, and the ball socket 3 is made of ultra-high molecular weight polyethylene, specifically high cross-linked ultra-high molecular weight polyethylene, and has good wear resistance.

In the embodiment, the first fixing body 1 and the second fixing body 4 are made of metal, the friction joint surface of the metal and polyethylene reduces the abrasion and the generation of friction particles, and the joint prosthesis implanted into the body has good abrasion resistance and biocompatibility.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An implanted finger joint prosthesis, comprising: comprises a first fixed body (1), a ball head (2), a ball socket (3) and a second fixed body (4) which are sequentially connected in sequence; the first fixing body (1) is provided with a first fixing end (13) and a second fixing end (11) which are far away from each other, a first matching surface (12) used for being connected with a human phalanx is arranged between the first fixing end (13) and the second fixing end (11), and a plurality of spiral first line bulges (121) are arranged on the first matching surface (12); the bulb (2) is connected with the second fixing end (11), and a convex spherical surface (21) is arranged outside the bulb (2); the second fixing body (4) is provided with a third fixing end (41) and a fourth fixing end (43) which are far away from each other, a second matching surface (42) used for being connected with a human phalanx is arranged between the third fixing end (41) and the fourth fixing end (43), and a plurality of spiral second line protrusions (421) are arranged on the second matching surface (42); the ball socket (3) is connected with the third fixing end (41) through a locking structure (5), an inner concave spherical surface (31) is arranged at one end of the ball socket, and the ball head (2) is connected with the ball socket (3) through the outer convex spherical surface (21) and the inner concave spherical surface (31) in a matched mode.

2. The implantable finger joint prosthesis according to claim 1, wherein: the first texture bulge (121) and the second texture bulge (421) are external threads.

3. The implantable finger joint prosthesis according to any one of claims 1-2, wherein: second stiff end (11) are the circular cone of surface taper that is equipped with, bulb (2) be equipped with circular cone grafting complex bulb circular cone hole (22), being close to of second stiff end (11) the diameter of bulb (2) one end is less than keeps away from the diameter of bulb (2) one end.

4. The implantable finger joint prosthesis according to claim 3, wherein: the end face, close to one end of the ball head (2), of the second fixing end (11) is provided with a first screwing hole (14), and the first screwing hole (14) is an inner polygonal hole.

5. The implantable finger joint prosthesis according to any one of claims 1-2, wherein: third stiff end (41) are the circular cone that the surface is equipped with the tapering, ball socket (3) be equipped with circular cone grafting complex ball socket circular cone hole (32), the diameter that is close to of third stiff end (41) ball socket (3) one end is less than and keeps away from the diameter of bulb (2) one end.

6. The implantable finger joint prosthesis according to claim 5, wherein: and a second screwing hole (44) is formed in the end face, close to one end of the ball socket (3), of the third fixing end (41), and the second screwing hole (44) is an inner polygonal hole.

7. The implantable finger joint prosthesis according to claim 6, wherein: the locking structure (5) comprises a clamping ring (51) arranged on the outer surface of the third fixing end (41) and a clamping groove (52) arranged on the inner surface of the ball socket conical hole (32), the clamping ring (51) is elastic, and the clamping ring (51) is in clamping fit with the clamping groove (52).

8. The implantable finger joint prosthesis according to claim 1, wherein: first stiff end (13) with the cone that fourth stiff end (43) were, the diameter that is close to the one end of second stiff end (11) of first stiff end (13) is greater than the diameter of the free end of first stiff end (13), being close to of fourth stiff end (43) the diameter of the one end of third stiff end (41) is greater than the diameter of the free end of fourth stiff end (43), the cone is the solid of revolution of parabola for the generating line.

9. The implantable finger joint prosthesis according to claim 1, wherein: the ball socket (3) is a cone with a taper on the outer surface, and the diameter of one end of the concave spherical surface (31) arranged on the ball socket (3) is larger than that of one end connected with the second fixing body (4).

10. The implantable finger joint prosthesis according to claim 1, wherein: the first fixing body (1) and the second fixing body (4) are made of Ti6Al4V, the ball head (2) is made of CoCrMo, and the ball socket (3) is made of ultra-high molecular weight polyethylene.