CN202761481U

CN202761481U - Bionic double-action full hip device

Info

Publication number: CN202761481U
Application number: CN 201220388993
Authority: CN
Inventors: 刘念
Original assignee: JIASITE MEDICAL EQUIPMENT (TIANJIN) CO Ltd
Current assignee: JIASITE MEDICAL EQUIPMENT (TIANJIN) CO Ltd
Priority date: 2012-08-08
Filing date: 2012-08-08
Publication date: 2013-03-06
Anticipated expiration: 2022-08-08

Abstract

The utility model provides a bionic double-action full hip device which is used for solving the problem that rotation movement range of a hip joint prosthesis is small. The bionic double-action full hip device comprises an acetabulum cup, a lining matched with the acetabulum cup is arranged in the acetabulum cup, the bionic double-action full hip device further comprises a connector matched with the inner surface of the lining, the hip joint prosthesis is fixed on the connector, the outer surface of the lining is movably matched with the inner surface of the acetabulum cup, and the outer surface of the connector is movably matched with the inner surface of the lining. The bionic double-action full hip device not only can effectively increase the rotation movement range of the hip joint prosthesis and can be adapted to movement scope of a human body physiological hip joint, but also enables the thickness of the lining to accord with requirements of national standards, and has good practicability.

Description

A kind of bionical two moving full hip devices

Technical field

This utility model relates to technical field of medical instruments, refers to especially a kind of bionical two moving full hip devices.

Background technology

At present, the structure of domestic total hip prostheses is generally by acetabular cup 1, liner 2, union joint 3 and hip prosthesis 4 form (as shown in Figure 1), acetabular cup 1 and liner 2 are fixed as one, the inner surface of liner 2 is Internal Spherical Surface, the outer surface of union joint 3 is the spherical outside surface suitable with the Internal Spherical Surface of liner 2, hip prosthesis 4 is fixed on the union joint 3 simultaneously, like this, by the rotation of union joint 3 in liner 2, can make hip prosthesis 4 have the swing of certain amplitude, this structure of only having union joint 3 to move namely is the single action structure, as shown in Figures 2 and 3, is respectively two kinds of limit state sketch maps of this single action structure, its shortcoming is that mobility is little, the actuating range of hip prosthesis 4 is not more than 90 °, and the actuating range of the physiology hip joint of human body does not satisfy the human body needs far away greater than 120 °.

As shown in Figure 4, full hip device for a kind of two moving structures, be provided with three layers of liner 2 that is superimposed with each other together at the inner surface place of acetabular cup 1, wherein there is two-layer liner 2 to relatively rotate, add the rotation of union joint 3 in liner 2, than Fig. 1, just increased the actuating range of hip prosthesis 4, but because overall dimensions is limited, after the number of plies that has increased liner 2, the thickness of the liner 2 of every one deck has been subject to significantly cutting down, the requirement that finally makes the thickness of liner 2 not reach national regulation.

The utility model content

The utility model proposes a kind of bionical two moving full hip devices, not only can effectively increase the scope that rotatablely moves of hip prosthesis, and its thickness of inner lining meets the requirement of national standard.

The technical solution of the utility model is achieved in that bionical two moving full hip device, comprise acetabular cup, be provided with the liner adaptive with it in the described acetabular cup, also comprise the union joint suitable with the inner surface of described liner, be fixed with hip prosthesis on the described union joint, the inner surface clearance fit of the outer surface of described liner and described acetabular cup, the inner surface clearance fit of the outer surface of described union joint and described liner.

As a kind of preferred implementation, the inner surface of described acetabular cup is Internal Spherical Surface, and the outer surface of described liner is the spherical outside surface suitable with the Internal Spherical Surface of described acetabular cup.

As a kind of preferred implementation, the inner surface of described liner is Internal Spherical Surface, and the outer surface of described union joint is the spherical outside surface suitable with the Internal Spherical Surface of described liner.

As a kind of preferred implementation, described acetabular cup is the acetabular cup of metal material.

As a kind of preferred implementation, described union joint is the union joint of metal material or ceramic material.

After having adopted above-mentioned embodiment, the beneficial effects of the utility model are: owing to only be provided with one deck liner on the inner surface of acetabular cup, the outer surface of while liner and the inner surface clearance fit of acetabular cup, the inner surface clearance fit of the outer surface of union joint and liner, realized that so not only the two moving of full hip device (is can relatively rotate between liner and the acetabular cup, can relatively rotate between union joint and the liner), effectively increased the actuating range of hip prosthesis, and the thickness of liner meets the requirement of national standard.On function, the angle of position is received greater than 120 ° to imperial palace in the maximum abduction of shank position, simultaneously greater than the thickness of inner lining of straight-bar 44mm specification acetabular cup all greater than 5mm, and diameter is Φ 24mm or Φ 22mm less than the union joint of 44mm specification acetabular cup, and the diameter of national Specification can be less than 5mm less than or equal to the thickness of the liner of 44mm specification acetabular cup, therefore, the product that adopts the technical program not only effect is better than the functional requirement of product, and satisfy the requirement of national standard, have good practicality.

Description of drawings

In order to be illustrated more clearly in this utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structural representation of the full hip device of single action structure in the prior art;

Fig. 2 is a kind of extreme position sketch map of full hip device among Fig. 1;

Fig. 3 is the another kind of extreme position sketch map of full hip device among Fig. 1;

Fig. 4 is the structural representation of the full hip device of two moving structures in the prior art;

Fig. 5 is a kind of extreme position sketch map of this utility model embodiment;

Fig. 6 is the another kind of extreme position sketch map of this utility model embodiment;

Among the figure: the 1-acetabular cup; The 2-liner; The 3-union joint; The 4-hip prosthesis.

The specific embodiment

Below in conjunction with the accompanying drawing among this utility model embodiment, the technical scheme among this utility model embodiment is clearly and completely described, obviously, described embodiment only is this utility model part embodiment, rather than whole embodiment.Based on the embodiment in this utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of this utility model protection.

Shown in Fig. 1, Fig. 2 and Fig. 3 are common, sketch map for three kinds of different conditions of full hip device of a kind of single action structure in the prior art, the full hip device of this structure, relatively fixing between acetabular cup 1 and the liner 2, only having union joint 3 to do in liner 2 relatively rotates, thereby drive the action that certain angle occurs hip prosthesis 4, but the operating angle of hip prosthesis 4 is little, is far smaller than the actuating range of the physiology hip joint of human body---120 °.

As shown in Figure 4, full hip device for a kind of two moving structures in the prior art, be provided with three layers of liner 2 that is superimposed with each other together at the inner surface place of acetabular cup 1, wherein there is two-layer liner 2 to relatively rotate, add the rotation of union joint 3 in liner 2, than the single action structure, just increased the actuating range of hip prosthesis 4, but because overall dimensions is limited, after the number of plies that has increased liner 2, the thickness of the liner 2 of every one deck has been subject to significantly cutting down, the requirement that finally makes the thickness of liner 2 not reach national regulation.

Embodiment:

Shown in Fig. 5 and Fig. 6 are common, two kinds of extreme position sketch maps for this utility model embodiment, among this embodiment, the inner surface of acetabular cup 1 is Internal Spherical Surface, the outer surface of liner 2 is the spherical outside surface suitable with the Internal Spherical Surface of acetabular cup 1, and is clearance fit between the spherical outside surface of the Internal Spherical Surface of acetabular cup 1 and liner 2.

The inner surface of liner 2 is Internal Spherical Surface, the outer surface of union joint 3 is the spherical outside surface suitable with the Internal Spherical Surface of liner 2, and be clearance fit between the spherical outside surface of the Internal Spherical Surface of liner 2 and union joint 3, at union joint 3 hip prosthesis 4 is arranged surely together also, like this, by rotation and liner 2 rotation acetabular cup 1 in the rotatablely move scope that can effectively increase hip prosthesis 4 of union joint 3 in liner 2, the thickness of liner 2 can satisfy the requirement of national regulation simultaneously.

In addition, the material of acetabular cup 1 can be selected metal, and the material of liner 2 can be selected metal or nonmetal (for example PE or pottery), the material of union joint 3 can be selected metal or pottery, and not only cost is lower, is fit to produce in enormous quantities, and reliable in quality, long service life.

The above only is preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. one kind bionical pair is moved full hip devices, comprising:

Acetabular cup is provided with the liner adaptive with it in the described acetabular cup;

With the suitable union joint of the inner surface of described liner, be fixed with hip prosthesis on the described union joint; It is characterized in that:

The inner surface clearance fit of the outer surface of described liner and described acetabular cup;

The inner surface clearance fit of the outer surface of described union joint and described liner.

2. bionical pair as claimed in claim 1 is moved full hip devices, and it is characterized in that: the inner surface of described acetabular cup is Internal Spherical Surface, and the outer surface of described liner is the spherical outside surface suitable with the Internal Spherical Surface of described acetabular cup.

3. bionical pair as claimed in claim 1 is moved full hip devices, and it is characterized in that: the inner surface of described liner is Internal Spherical Surface, and the outer surface of described union joint is the spherical outside surface suitable with the Internal Spherical Surface of described liner.

4. bionical pair as claimed in claim 1 is moved full hip devices, and it is characterized in that: described acetabular cup is the acetabular cup of metal material.

5. such as each described bionical two moving full hip devices of claim 1 to 4, it is characterized in that: described union joint is the union joint of metal material or ceramic material.