CN203303197U

CN203303197U - Hip-joint replacement

Info

Publication number: CN203303197U
Application number: CN2013203631618U
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: 2013-11-27
Anticipated expiration: 2023-06-24

Abstract

The utility model relates to a hip-joint replacement. The hip-joint replacement comprises a handle body (1) as well as a handle neck (2) and an acetabulum at the upper end of the handle body (1), and is characterized in that the acetabulum comprises a hemispherical metal acetabular cup (4) and an acetabular lining (3) sleeved by the acetabular cup (4); a porous tantalum workpiece layer (6) is adhered to the outer surface of the acetabular cup (4); a hemispherical femur ball head (5) is sleeved by the acetabular lining (3), and a threaded hole (9) is formed inside the hemispherical femur ball head (5); a spiral lock shaft (8) is arranged on the handle neck (2) and used for being connected to the threaded hole (9) inside the hemispherical femur ball head (5) in a corresponding matching manner; a plurality of rows of transversely extending bosses (7) are adhered to the surface at the upper part of the handle body (1), and are porous tantalum workpieces. The hip-joint replacement is conducive to ingrowth of bone, has excellent biocompatibility, and well meets mechanical properties.

Description

A kind of hip joint alternative

Technical field

This utility model relates to the displacement of medical science bone to be transplanted, and relates in particular to a kind of hip joint alternative.

Background technology

The various hip joint terminal illness of clinical medicine treatment, during as femur head necrosis etc., generally adopt the method for hip replacement surgery, body is implanted into made hip prosthesis, to play fixing and supporting role, and the anatomical structure of rebuilding human hip, and make it obtain normal mechanical property to complete certain physiological function, reach thus alleviating pain, improve the purpose of function.

Known existing hip joint alternative is the friction pair that has replaced ossa articularia to form with the friction pair that metal, macromolecular material or ceramic material form, but the hip joint alternative exists: its surface roughness is limited, causes the adhesion intensity of prosthese and bone surface not reach best state; Its biocompatibility is poor, thereby long-time use is rear and tissue there will be repulsion to affect the technical problems such as its service life.

For this reason, done large quantity research in existing design, expectation improves artificial joint by design, the material that changes the hip joint alternative and connects and application feature, but does not all significantly improve, and relevant issues still exist in a large number.

The utility model content

The purpose of this utility model is to provide a kind of hip joint alternative, and this hip joint alternative is conducive to bone grows into, and when having good biocompatibility concurrently, has also well met its mechanical property.

The purpose of this utility model is achieved in that

A kind of hip joint alternative, 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 metal acetabular cup, and be socketed in the mortar lining in this mortar cup, and on described mortar cup outer surface, also be attached with one deck porous tantalum product layer; In described mortar lining, be socketed with the femoral ball head, this femur bulb is hemispherical, and its inside is provided with screwed hole; On described handle neck, be provided with the screw lock axle, connect the inner screwed hole arranged of described femur bulb with Corresponding matching; The surface attachment on described handle body top has the boss of multiple tracks horizontal expansion, and this boss is set to the porous tantalum product.

The surface attachment on above-mentioned handle body top be the boss of porous tantalum product, and adhere to the porous tantalum product layer be arranged on mortar cup outer surface, 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: adopt the mortar cup of this porous tantalum product layer and the surface on the handle body top through adhering to for the boss of porous tantalum product, the structure of growing in bone being grown into 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 external side of handle is shape linearly, and to be from top to bottom tapering excessive on above-mentioned handle body top, by the inboard, lateral, is tapering excessive.

The above-mentioned porous tantalum product layer that adheres to setting on mortar cup outer surface, its thickness is 5～10 millimeters.The surface attachment on above-mentioned handle body top be the boss of porous tantalum product, exceed 5～10 millimeters of handle surfaces.

The utlity model has following beneficial effect:

Hip joint alternative in this utility model is simple in structure, compact and rationally, assemble efficient and conveniently, connect reliably.It is for adhering to the porous tantalum product layer of setting on the boss of porous tantalum product and mortar cup outer surface, the structure of growing in bone being grown into form, and really realize biological fixation, not only improved its biocompatibility, improve service life and implanted comfort level, also increase anti-verticity and stability, met its mechanical property.

The accompanying drawing explanation

Fig. 1 is the structural representation of the hip joint alternative in this utility model embodiment 1.

Fig. 2 is the handle body of the alternative of hip joint 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 alternative of hip joint shown in Fig. 1.

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

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

Fig. 6 is the structural representation of femur bulb in the alternative of hip joint 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 hip joint alternative, it includes handle body 1, reach handle neck 2 and acetabular bone that handle body 1 upper end is fixedly connected with, its acetabular bone includes hemispherical medical titanium alloy mortar cup 4, and by the fixedly sleeved polyethylene mortar lining 3 in this mortar cup 4 of bonding, on its mortar cup 4 outer surfaces, also be attached with a layer thickness and be the porous tantalum product layer 6 of 5～10 millimeters, its porosity is 60～70%; In its polyethylene mortar lining 3, be socketed with femoral ball head 5, this femur bulb 5 is hemispherical, and its inside is provided with screwed hole 9; On handle neck 2, be provided with screw lock axle 8, with Corresponding matching, connect the screwed hole 9 of femur bulb 5 inside, and realize being fixedly connected with of the two; Its handle body 1 adopts medical titanium alloy one-body molded, and the surface attachment on its top has 5 road horizontal expansions and exceeds the boss 7 on 5～10 millimeters, handle body 1 surface, and this boss 7 is set to the porous tantalum product, and its porosity is 60～70%; 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 handle body 1 top, by the inboard, lateral, is tapering excessive.

In clinical practice, by the artificial hip joint implant into body hip joint position in this example, the handle body is inserted in the human femur under loading pulp cavity, its handle shape have prevent from and in turn over, and with the beneficial features such as human femur under loading pulp cavity physiology shape matches; In acetabular bone implant into body acetabular fossa, its polyethylene mortar lining 3 and femur bulb 5 coupling that adapts, and femur bulb 5 can serve as a contrast 3 at the polyethylene mortar and interiorly freely rotate, and realized the movable function of human hip.And by the boss 7 of porous tantalum product and mortar cup 4 outer surfaces, adhering to the porous tantalum product layer 6 of setting, the structure of growing in bone being grown into form, and really realize biological fixation, not only improved its biocompatibility, improve service life and implanted comfort level, also increase anti-verticity and stability, met its mechanical property.

Claims

1. hip joint alternative, 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 metal acetabular cup (4), and be socketed in the mortar lining (3) in this mortar cup (4), and also be attached with one deck porous tantalum product layer (6) on described mortar cup (4) outer surface; In described mortar lining (3), be socketed with femoral ball head (5), this femur bulb (5) is hemispherical, and its inside is provided with screwed hole (9); On described handle neck (2), be provided with screw lock axle (8), connect the inner screwed hole (9) arranged of described femur bulb (5) with Corresponding matching; The surface attachment on described handle body (1) top has the boss (7) of multiple tracks horizontal expansion, and this boss (7) is set to the porous tantalum product.

2. hip joint alternative according to claim 1, it is characterized in that: described handle body (1) upper face adheres to is the boss (7) of porous tantalum product, and adhere to the porous tantalum product layer (6) be arranged on mortar cup (4) outer surface, its porosity is 60～70%.

3. hip joint alternative 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, by the inboard, lateral, is tapering excessive.

4. hip joint alternative according to claim 1 and 2 is characterized in that: the described porous tantalum product layer (6) that adheres to setting on mortar cup (4) outer surface, and its thickness is 5～10 millimeters; The surface attachment on described handle body (1) top be the boss (7) of porous tantalum product, exceed 5～10 millimeters of handle surfaces.

5. hip joint alternative according to claim 3 is characterized in that: the described porous tantalum product layer (6) that adheres to setting on mortar cup (4) outer surface, and its thickness is 5～10 millimeters; The surface attachment on described handle body (1) top be the boss (7) of porous tantalum product, exceed 5～10 millimeters of handle surfaces.