CN210784855U

CN210784855U - Acetabulum system for hip joint

Info

Publication number: CN210784855U
Application number: CN201921169869.3U
Authority: CN
Inventors: 高建华; 高立华; 刘海波; 袁浩; 陈志超
Original assignee: Changzhou Huazhong Biotechnology Co ltd
Current assignee: Changzhou Huazhong Biotechnology Co ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-06-19
Anticipated expiration: 2029-07-24

Abstract

An acetabulum system for hip joints, the utility model relates to the technical field of artificial joints; the inside of inside lining is equipped with the inner chamber, the inner chamber is the globular structure, the intracavity is equipped with the bulb, the right side of bulb is connected with the femoral stem through ceramic head, the surface of inside lining is equipped with outer facing, outer facing is the globular structure, the outside of outer facing is equipped with the outer cup of metal, the upper and lower both ends of outer facing all are equipped with the frustum structure, be equipped with the lug on the opening of inside lining, the lug is established with the outer cup of metal card mutually, the interior anchor ring of opening is equipped with the inner disc, and pass through circular cone connection between inner disc and the inner chamber, the inner chamber is more firm, the integrality is better, difficult wearing and tearing, difficult production relative activity, mechanical structure is simple, high durability and convenient installation.

Description

Acetabulum system for hip joint

Technical Field

The utility model relates to an artificial joint technical field, concretely relates to an acetabular bone system for hip joint.

Background

In 1960, England therapist, Qianlai, started to replace damaged hip joints with plastic sockets and metal balls for patients in Lankaishshire, the human hip joint was a spherical joint comprising a spherical femoral head and a bowl-like acetabulum, which is the joint formed by the femur and pelvis, the spherical surface layer and the bowl-like inner surface layer were both covered with smooth cartilage, and the synovial membrane secreted mucus minimized friction; when the hip joint is diseased, the cartilage is not smooth any more, the synovial capsule is inflamed and atrophied, the joint can not freely run as usual any more, the artificial hip joint prosthesis imitates the structure of the human hip joint, the handle part of the prosthesis is inserted into the cavity of the femoral bone marrow, and the head part and the joint mortar or the metal cup of the prosthesis are rotated to realize the flexion and extension of the femur; an artificial hip joint system comprises two parts: the acetabulum system and the femoral stem, the prior artificial hip cotyle cup lining adopts a clamping groove structure, which not only reduces the mechanical strength of the outer cup, but also inevitably generates a gap to cause relative movement to cause serious abrasion; the spherical inner cavity of the dead plate also causes severe abrasion between the lining and the femoral stem, a large amount of abrasion particles are generated, and the stress of the femoral stem is increased, so that the postoperative problems of high repair frequency and the like are caused, and urgent improvement is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a reasonable in design, convenient to use's an acetabular bone system for hip joint, the inner chamber is more firm, and the integrality is better, and difficult wearing and tearing are difficult for producing relative activity, and mechanical structure is simple, simple to operate, and the life-span of use is longer.

In order to achieve the above object, the utility model adopts the following technical scheme: it contains inside lining, outer cup of metal, the bulb, the femoral stem, the inside of inside lining is equipped with the inner chamber, the inner chamber is spherical structure, the intracavity is equipped with the bulb, the right side of bulb is connected with the femoral stem through ceramic head, the surface of inside lining is equipped with outer facing, outer facing is spherical structure, the outside of outer facing is equipped with the outer cup of metal, the upper and lower both ends of outer facing all are equipped with the frustum structure, be equipped with the lug on the opening of inside lining, the lug is established with the outer cup of metal looks card, the interior anchor ring of opening is equipped with the internal fillet, and pass through circular cone connection between internal fillet and the inner chamber.

Furthermore, a half-high-side lining is arranged in the inner cavity.

Furthermore, a full-height side lining is arranged in the inner cavity.

Further, the lug and the frustum structure have the same taper.

After the structure is adopted, the utility model discloses beneficial effect does: a acetabular bone system for hip joint, the inner chamber is more firm, the integrality is better, difficult wearing and tearing are difficult for producing relative activity, mechanical structure is simple, simple to operate, the life-span of use is longer, the utility model has the advantages of set up rationally, the cost of manufacture is low.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the middle-half high-side lining of the present invention.

Fig. 3 is a schematic structural view of the full-height side lining of the present invention.

Fig. 4 is a schematic structural view of the middle-connected metal outer cup of the present invention.

Fig. 5 is a schematic structural view of the middle connecting ball head and the femoral stem of the present invention.

Description of reference numerals:

the femoral head comprises a lug 1, an inner fillet 2, an inner cavity 3, a cone 4, a lining opening 5, an outer lining surface 6, a frustum structure 7, an inner lining 8, a ball head 9, a metal outer cup 10, a femoral stem 11 and a ceramic head 12.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 5, the technical solution adopted by the present embodiment is: the femoral head comprises an inner lining 8, an outer metal cup 10, a ball head 9 and a femoral stem 11, wherein an inner cavity 3 is arranged inside the inner lining 8, the inner cavity 3 is of a spherical structure, the ball head 9 is embedded in the inner cavity 3, the right side of the ball head 9 is connected with the femoral stem 11 through a ceramic head 12, an outer lining surface 6 is arranged on the outer surface of the inner lining 8, the outer lining surface 6 is of the spherical structure, the outer metal cup 10 is covered outside the outer lining surface 6, frustum structures 7 are clamped at the upper end and the lower end of the outer lining surface 6, lugs 1 are integrally formed on a lining opening 5 of the inner lining 8, the lugs 1 are clamped with the outer metal cup 10, the lugs 1 are connected and matched with the outer metal cup 10, the connection stability of the inner lining 8 and the outer metal cup 10 is improved, circumferential movement is prevented, the abrasion risk is reduced, an inner ring surface of the lining opening 5 is provided with an inner ring angle 2, and the inner ring angle 2 is connected with the inner cavity 3 through, reduced the production of wearing and tearing risk and wearing and tearing granule, not only prolonged the life of inside lining 8, still reduced the stress production of femoral stem 11, still reduced the fracture risk, inner chamber 3 in be equipped with half high limit inside lining, half high limit inside lining is under not restricting acetabular system operation, has increased the anti-drop function, has reduced the dislocation risk, inner chamber 3 in be equipped with full high limit inside lining, reduced partly unnecessary degree of freedom operation, thereby strengthened the anti-drop function, lug 1 and frustum structure 7's tapering unanimity, avoided the problem of reducing the intensity to increased cooperation area of contact, made the connection more stable, still reduced the regional wearing and tearing of function, the practicality is stronger.

The working principle of the specific embodiment is as follows: lug 1 and metal cup 10 are connected the cooperation, the plug screw is installed in the bottom hole of metal cup 10, the outer cup 10 of mounting screw fixed metal, form the structure of connecting metal cup 10 outward, the embedded bulb 9 that is equipped with of inner chamber 3, the femoral stem 11 is connected to bulb 9, the structure of femoral stem 11 is connected to bulb 9, inner structure's lug 1 is unanimous with frustum structure 7's tapering, the problem of reducing the strength has been avoided, and cooperation area of contact has been increased, it is more stable to make the connection, be connected through circular cone 4 between interior fillet 2 and the inner chamber 3, femoral stem 11 and inside lining 8 have been avoided producing wearing and tearing, the production of wearing and tearing risk and abrasive particles has been reduced, the design is more reasonable, the practicality is stronger, the service life is more of a specified duration for a specified duration.

After adopting above-mentioned structure, this embodiment beneficial effect does: the acetabular system for the hip joint, which is described in the specific embodiment, has the advantages of more stable inner cavity, better integrity, less possibility of abrasion and relative movement, simple mechanical structure, convenience in installation and longer service life.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. An acetabular system for a hip joint, the acetabular system comprising: the femoral head comprises a lining (8), an outer metal cup (10), a ball head (9) and a femoral stem (11), wherein an inner cavity (3) is arranged inside the lining (8), the inner cavity (3) is of a spherical structure, the ball head (9) is arranged in the inner cavity (3), the right side of the ball head (9) is connected with the femoral stem (11) through a ceramic head (12), an outer lining surface (6) is arranged on the outer surface of the lining (8), the outer lining surface (6) is of a spherical structure, the outer metal cup (10) is arranged on the outer side of the outer lining surface (6), frustum structures (7) are arranged at the upper end and the lower end of the outer lining surface (6), lugs (1) are arranged on a lining opening (5) of the lining (8), the lugs (1) are clamped with the outer metal cup (10), an inner ring surface of the lining opening (5) is provided with an inner circular cone (2), and the inner cone (4) is connected between.

2. An acetabular system for a hip joint according to claim 1 wherein: the inner cavity (3) is internally provided with a half-high side lining.

3. An acetabular system for a hip joint according to claim 1 wherein: the inner cavity (3) is internally provided with a full-height side lining.

4. An acetabular system for a hip joint according to claim 1 wherein: the taper of the lug (1) is consistent with that of the frustum structure (7).