CN203328856U

CN203328856U - Simply combined hip joint

Info

Publication number: CN203328856U
Application number: CN2013203625852U
Authority: CN
Inventors: 叶雷
Original assignee: Chongqing Runze Pharmaceutical Co Ltd
Current assignee: Chongqing Runze Pharmaceutical Co Ltd
Priority date: 2013-06-24
Filing date: 2013-06-24
Publication date: 2013-12-11
Anticipated expiration: 2023-06-24

Abstract

The utility model relates to a simply combined hip joint which comprises a handle body (1), a handle neck (2) at the upper end of the handle body (1) and an acetabulum. The simply combined hip joint is characterized in that the acetabulum comprises a hemispherical acetabular cup (4) and an acetabular liner (3) connected in the acetabular cup (4) in a sleeved mode, the acetabular cup (4) is designed to be a porous tantalum piece, a femoral head (5) is connected in the acetabular liner (3) in a sleeved mode, the femoral head (5) is hemispherical, a conical groove (9) is formed inside the femoral head (5), a positioning frustum (10) is arranged on the end portion of the handle neck (2) to be matched with the conical groove (9) to achieve connection, bosses (7) extending obliquely are attached to the front side of the handle body (1) and to the back side of the handle body (1) respectively along the handle body (1), each boss (7) is designed to be a porous tantalum piece, a horizontally through hole (6) is further formed in the lower end of the handle body (1), a plurality of spherical grooves (11) are further formed in the outer surface of the femoral head (5), and stainless steel balls (12) are placed in the grooves (11). The simply combined hip joint is simple and reasonable in structure and reliable in connection.

Description

A kind of simple combination hip joint

Technical field

This utility model relates to the artificial joint in medical domain, relates in particular to a kind of simple combination hip joint.

Background technology

The hip joint that displacement transplant operation in medical domain is used, generally by titanium alloy, macromolecular material or ceramic material etc., made, it and human femur under loading are difficult to fix, easily occur looseningly, and the gravity that femur bears is difficult to equilibrium, and biocompatibility is poor, long-time use is rear and thereby tissue there will be repulsion to shorten its service life, increase the turnover rate of femoral stem, made the discarded amount of femoral stem increase, be difficult to meet modern environmental protection concept.

The utility model content

The purpose of this utility model is to provide a kind of simple combination hip joint, and this hip joint is simple and reasonable, and assembling is reliable, and has good biocompatibility concurrently.

The purpose of this utility model is achieved in that

A kind of simple combination hip joint, it includes the handle body, and handle neck and the acetabular bone of handle body upper end, and it is characterized in that: described acetabular bone includes hemispherical mortar cup, and is socketed in the mortar lining in this mortar cup, and described mortar cup is set to the porous tantalum product; Be socketed with the femoral ball head in described mortar lining, this femur bulb is hemispherical, and its inside is provided with conical socket; Described handle neck is provided with the location frustum on end, with the described conical socket of Corresponding matching, realizes connecting; The front and back side of described handle body is attached with respectively the boss of oblique extension along this handle body, this boss is set to the porous tantalum product, and handle body lower end has additional the through hole of lateral direction penetrating in addition; Also be provided with a plurality of spherical grooves on described femur bulb outer surface, and place stainless shot in groove, so that described femur bulb and described mortar lining are slidably and more flexible.

Above-mentioned mortar cup, and the boss arranged on side before and after above-mentioned handle body, all be set to the porous tantalum product, and its porosity is 60～70%.This porous tantalum product, can adopt the preparations such as foam dipping method, die pressing.Through the discovery that studies for a long period of time: the mortar cup and the handle body that adopt this porous tantalum product, the structure of growing in making bone grow into to form, with body bone tissue, organically combine as a whole, in the biocompatibility that has greatly improved this artificial joint, also well met its mechanical property, greatly improved its service life and implanted comfort level, having increased stability and anti-verticity after prosthese is implanted.

The top of above-mentioned handle body is the nearly triangle bodily form, bottom is cylindrical, and wherein, handle body upper inner is interior circular arc, and the outside is shape linearly, and to be from top to bottom tapering excessive on above-mentioned handle body top, is tapering by the inboard, lateral excessive.

Be provided with screw in above-mentioned through hole, this screw adopts conventional medical metal product, and its two ends stretch out the handle surface, to increase this hip joint, with the firm of human femur under loading, is connected.

Between conical socket in location frustum on above-mentioned handle neck end and above-mentioned femur bulb, by interference type, insert connection, its connected mode is solid and reliable, can effectively prevent from becoming flexible.

The oblique extension that the front and back side of above-mentioned handle body is adhered to respectively along this handle body be the boss of porous tantalum product, exceed 5～10 millimeters of handle surfaces, this boss is similar to the ridge shape on the handle body, increased and femur between mutual embedding, increased stability and anti-rotatory.

The utlity model has following beneficial effect:

This hip joint is simple in structure, compact and rationally, assemble efficient and conveniently, connect reliable.Its structure of growing in making bone grow into to form, and really realize biological fixation, not only improved its biocompatibility, improve service life and implanted comfort level, also increased anti-verticity and stability, met its mechanical property.

The accompanying drawing explanation

Fig. 1 is the overall structure schematic diagram of the simple combination hip joint in this utility model embodiment 1.

Fig. 2 is the handle body of the hip joint of simple combination shown in Fig. 1 and the syndeton schematic diagram of handle neck.

Fig. 3 is the combinative structure cutaway view of handle neck, femur bulb and the acetabular bone of the hip joint of simple combination shown in Fig. 1.

Fig. 4 is the structural representation of the mortar cup in the hip joint of simple combination shown in Fig. 1.

Fig. 5 is the structural representation of the mortar lining in the hip joint of simple combination shown in Fig. 1.

Fig. 6 is the structural representation of the femur bulb in the hip joint of simple combination shown in Fig. 1.

The specific embodiment

Be below this utility model preferred embodiment, and be not intended to limit protection domain of the present utility model.

Embodiment 1

As shown in Fig. 1～6: a kind of simple combination hip joint, it includes handle body 1, and medical titanium alloy handle neck 2 and the acetabular bone of the fixing welding in handle body 1 upper end; Its acetabular bone includes hemispherical mortar cup 4, and serves as a contrast 3 by the fixedly sleeved polyethylene mortar this mortar cup 4 in of bonding, and mortar cup 4 is set to the porous tantalum product, and its porosity is 60～70%; Be socketed with femoral ball head 5 in this polyethylene mortar lining 3, this femur bulb 5 is hemispherical, and its inside is provided with conical socket 9; Its handle neck 2 ends are provided with location frustum 10, to insert connection Corresponding matching conical socket 9 by interference type, realize being fixedly connected with of femur bulb 5 and handle neck 2; Its handle body 1 adopts medical titanium alloy one-body molded, and before and after it, side is attached with respectively the boss 7 of oblique extension along this handle body 1 surface, this boss 7 is set to the porous tantalum product, its porosity is 60～70%, and this boss 7 exceeds 5～10 millimeters, handle body 1 surface, be similar to the ridge shape, increased and femur between mutual embedding, increased stability and anti-rotatory; Handle body 1 lower end has additional the through hole 6 of two lateral direction penetratings in addition, in this through hole 6, is equipped with screw 8, and this screw 8 adopts conventional medical titanium alloy product, and its two ends stretch out handle body 1 surface, to increase this hip joint, with the firm of human femur under loading, is connected; Also be provided with 2 spherical grooves 11 on its femur bulb 5 out course surfaces, and all place stainless shot 12 this spherical groove 11 is interior, so that femur bulb 5 is slidably and more flexible with polyethylene mortar lining 3; The top of its handle body 1 is the nearly triangle bodily form, bottom is cylindrical, and wherein, handle body 1 upper inner is interior circular arc, and arc radius is 100mm, and the outside is shape linearly, and to be from top to bottom tapering excessive on this handle body 1 top, is tapering by the inboard, lateral excessive.

The utlity model has simple in structure, compactness and reasonable, connect reliably, and have the good characteristics such as biocompatibility concurrently.

Claims

1. a simple combination hip joint, it includes handle body (1), and handle neck (2) and the acetabular bone of handle body (1) upper end, it is characterized in that: described acetabular bone includes hemispherical mortar cup (4), and be socketed in the mortar lining (3) in this mortar cup (4), and described mortar cup (4) is set to the porous tantalum product; Be socketed with femoral ball head (5) in described mortar lining (3), this femur bulb (5) is hemispherical, and its inside is provided with conical socket (9); Be provided with location frustum (10) on described handle neck (2) end, realize with the described conical socket of Corresponding matching (9) connecting; The front and back side of described handle body (1) is attached with respectively the boss (7) of oblique extension along this handle body (1), this boss (7) is set to the porous tantalum product, and handle body (1) lower end has additional the through hole (6) of lateral direction penetrating in addition; Also be provided with a plurality of spherical grooves (11) on described femur bulb (5) outer surface, and place stainless shot (12) in groove.

2. simple combination hip joint according to claim 1 is characterized in that: described mortar cup (4), and the boss (7) arranged on side before and after described handle body (1), all be set to the porous tantalum product, and its porosity is 60～70%.

3. simple combination hip joint according to claim 1 and 2, it is characterized in that: the top of described handle body (1) is the nearly triangle bodily form, bottom is cylindrical, and wherein, described handle body (1) upper inner is interior circular arc, and the outside is shape linearly; And it is excessive that described handle body (1) top is tapering from top to bottom, is tapering by the inboard, lateral excessive.

4. simple combination hip joint according to claim 1 and 2, it is characterized in that: be provided with screw (8) in described through hole (6), this screw (8) adopts conventional medical metal product, and described handle body (1) surface is stretched out at its two ends.

5. simple combination hip joint according to claim 3, it is characterized in that: be provided with screw (8) in described through hole (6), this screw (8) adopts conventional medical metal product, and described handle body (1) surface is stretched out at its two ends.

6. simple combination hip joint according to claim 1 and 2, is characterized in that: between the conical socket (9) in the location frustum (10) on described handle neck (2) end and described femur bulb (5), by interference type, insert connection; The oblique extension that the front and back side of described handle body (1) is adhered to respectively along this handle body (1) be the boss (7) of porous tantalum product, exceed 5～10 millimeters, handle body (1) surface.

7. simple combination hip joint according to claim 3, is characterized in that: between the conical socket (9) in the location frustum (10) on described handle neck (2) end and described femur bulb (5), by interference type, insert connection; The oblique extension that the front and back side of described handle body (1) is adhered to respectively along this handle body (1) be the boss (7) of porous tantalum product, exceed 5～10 millimeters, handle body (1) surface.

8. simple combination hip joint according to claim 4, is characterized in that: between the conical socket (9) in the location frustum (10) on described handle neck (2) end and described femur bulb (5), by interference type, insert connection; The oblique extension that the front and back side of described handle body (1) is adhered to respectively along this handle body (1) be the boss (7) of porous tantalum product, exceed 5～10 millimeters, handle body (1) surface.

9. simple combination hip joint according to claim 5, is characterized in that: between the conical socket (9) in the location frustum (10) on described handle neck (2) end and described femur bulb (5), by interference type, insert connection; The oblique extension that the front and back side of described handle body (1) is adhered to respectively along this handle body (1) be the boss (7) of porous tantalum product, exceed 5～10 millimeters, handle body (1) surface.