CN201542778U

CN201542778U - Vertical-trough handle hip-joint prosthesis

Info

Publication number: CN201542778U
Application number: CN 200920246642
Authority: CN
Inventors: 史春宝; 解凤宝
Original assignee: Beijing Chunlizhengda Technology & Development Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2009-10-21
Filing date: 2009-10-21
Publication date: 2010-08-11
Anticipated expiration: 2019-10-21

Abstract

The utility model relates to a vertical-trough handle hip-joint prosthesis, which comprises a neck part, a near-end conical surface, a far-end backbone part and a bullet end part, wherein the sagittal surface, the coronal plane and the cross section of the neck part are all designed into the cone shape. The vertical-trough handle hip-joint prosthesis has strong long-time rotation resistance, better stability and wider activity range, is not easy to dislocate and rotate and reduces the pain of a hip-joint replacement patient, so as to recover the normal life of the patient and improve the living quality.

Description

Vertical slot handle hip prosthesis

Technical field

This utility model relates to a kind of surgery implanting prosthetic, particularly a kind of vertical slot handle hip prosthesis.

Background technology

Existing advanced hip prosthesis is biological fixed pattern handle hip prosthesis, comprises integrated cervical region, near-end taper surface, the key part of far-end handle and sub warhead end.

After above-mentioned hip prosthesis is implanted in patient's body, though good biological fixation can be provided, and recess diameter is thicker, bearing capacity is stronger, and far-end polishing and the design of sub warhead end are beneficial to prosthese and pass narrow pulp cavity, have progressive really, but when using, reality but finds also to have in its structure some shortcomings, cause this hip prosthesis in practical application, fail to reach best result of use, and its shortcoming can be summarized as follows:

1, this product is by strengthening the bearing capacity that recess diameter improves prosthese, and diameter is when becoming big back prosthese and doing interior receipts, abduction activity, and therefore cervical region can limit the range of activity of prosthese with the collision of acetabular component position and with the dislocation risk.

2, because limitation of activity, make between femoral stem and the acetabular component and bump easily and rub, produce wear particle, between prosthese and surface of bone, form the soft tissue interfacial film of characteristic, its composition is macrophage and fibroblast, produce bone resorbing factor simultaneously, cause bone resorption, and cause that hip prosthesis sinks and aseptic loosening.

3, its near-end adopts the triconic surface design, and micropore is carried out on the surface handle, and is beneficial to bone and grows into, and it is stable that prosthese is implanted initial fixation, still along with patient's activity, prosthetic loosening and rotation takes place easily still.

4, distal portion adopts the design of polishing sub warhead, though can reduce bump to cortical bone, the stability of far-end only depends on the groove of the key part of far-end handle, and therefore stability is not enough, can not satisfy that higher quality of life requires and Operations Requirements on a large scale.

This shows that above-mentioned existing hip prosthesis obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.It is stronger how to develop a kind of long-term anti-rotation performance, stability is better, range of activity is bigger, and be difficult for dislocation, be difficult for rotation, alleviating hip replacement patient's slight illness, make it recover orthobiosis and the vertical slot handle hip prosthesis of the new structure of improving the quality of living, is the target of the current important improvement in this area.

The utility model content

The purpose of this utility model is, overcome the defective that existing hip prosthesis exists, and a kind of vertical slot handle hip prosthesis of new structure is provided, and technical problem to be solved is to make its long-term anti-rotation performance stronger, stability is better, range of activity is bigger, and be difficult for dislocation, be difficult for rotation, alleviate hip replacement patient's slight illness, make it recover orthobiosis and improve the quality of living, thereby be suitable for practicality more.

The purpose of this utility model and to solve its technical problem be to adopt following technical scheme to realize.A kind of vertical slot handle hip prosthesis according to the utility model proposes comprises cervical region, near-end taper surface, distal bone cadre and sub warhead end, it is characterized in that sagittal plane, coronalplane and the cross section of described cervical region is conical design.

The purpose of this utility model and solve its technical problem and can also be further achieved by the following technical measures.

Aforesaid vertical slot handle hip prosthesis, the two sides of described near-end taper surface are provided with convex tendon.

Aforesaid vertical slot handle hip prosthesis, described near-end taper surface two sides respectively are provided with 2-8 bar convex tendon.

Aforesaid vertical slot handle hip prosthesis, the upper base of the upper end cross section of described cervical region is 6.1-6.9mm, goes to the bottom to be 7.2-8.0mm, high 12-12.5mm; The upper base of lower end cross section is 10.1-13.4, goes to the bottom greater than upper base 0.1-1.2mm high 20.1-26.6mm.

Aforesaid vertical slot handle hip prosthesis, described near-end taper surface is provided with surface micropore.

Aforesaid vertical slot handle hip prosthesis, the blunt transition of described near-end taper surface periphery circle.

This utility model compared with prior art has following tangible advantage and beneficial effect at least:

1, this utility model vertical slot handle hip prosthesis, its cervical region adopts wedge shape, the design of three taperings, realize the near-end Stress Transfer, improve the bending strength of prosthese, and make hip joint that enough interior outward turning range of activity be arranged, greatly improved patient's Operations Requirements and quality of life, prolong prosthese service life, reduce and overhaul number of times, adapt to the trend that the hip replacement clinical technology is ripe and the patient becomes younger, and help to alleviate patient's economy and physical and mental burden.

2, this utility model vertical slot handle hip prosthesis, the near-end two sided increases by eight and strengthens fixedly muscle, increased and on every side spongy bone contact area and it is pressed between muscle in the groove, make that prosthese near-end incipient stability is fixed, long-term anti-rotation performance is stronger, surface micropore is beneficial to bone and grows into.Far-end adopts the conical cross-section design, and round blunt shape seamlessly transits all around, is beneficial to stress and disperses, and adopts super polishing technology, and it is minimum that the particulate debris that produces between prosthese is dropped to, and the long-time stability of prosthese are further strengthened.

3, this utility model vertical slot handle hip prosthesis, can look back by CT database analysis and iconography, adopt advanced forging to make the prosthese of different size, both guaranteed product precision, improved production efficiency, reduced production cost, can adapt to the needs of different crowd again.

In sum, this utility model vertical slot handle hip prosthesis, long-term anti-rotation performance is stronger, and stability is better, and range of activity is bigger, and is difficult for dislocation, is difficult for rotation, alleviates hip replacement patient's slight illness, makes it recover orthobiosis and improves the quality of living.The utlity model has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on product structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing hip prosthesis has the effect of enhancement, thereby is suitable for practicality more.

Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of description, and for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.

Description of drawings

Fig. 1 is the structural representation of this utility model vertical slot handle hip prosthesis.

Fig. 2 is the right view of Fig. 1.

Fig. 3 is the vertical view of Fig. 1.

Fig. 4 is the cross-sectional schematic of A-A direction among Fig. 1.

Fig. 5 is the cross-sectional schematic of B-B direction among Fig. 1.

Fig. 6 is the cross-sectional schematic of C-C direction among Fig. 1.

The specific embodiment

For further setting forth this utility model is to reach technological means and the effect that predetermined utility model purpose is taked, below in conjunction with accompanying drawing and preferred embodiment, to according to its specific embodiment of vertical slot handle hip prosthesis, structure, feature and the effect thereof that the utility model proposes, describe in detail as after.

See also shown in Fig. 1-3, this utility model vertical slot handle hip prosthesis comprises cervical region 1, near-end taper surface 2, far-end handle backbone portion 3 and sub warhead end 4.

Please cooperate and consult shown in Fig. 4-6, cervical region 1 adopts the triconic design, and just sagittal plane, coronalplane and cross section are conical design, can set corresponding size according to prosthese model and actual needs.For example, the upper base of cervical region 1 upper end cross section is 6.1-6.9mm, and going to the bottom is 7.2-8.0mm, high 12-12.5mm; The upper base of lower end cross section is 10.1-13.4, goes to the bottom greater than upper base 0.1-1.2mm high 20.1-26.6mm.

Behind this utility model implant into body, because the top of cervical region 1 is thinner and the probability of acetabular bone collision reduces, interior outward turning range of activity is bigger, and can adopt super polishing technology to cervical region 1, and it is minimum that the particulate debris that produces between prosthese is dropped to.And its cervical region 1 up-thin-low-thick design also helps the stress dispersion, makes the stressed handle body that is distributed to fast of cervical region, thereby has increased bending strength and bearing capacity.

The blunt transition of periphery circle of near-end taper surface 2 is beneficial to stress and disperses.Two sides respectively are provided with 2-8 bar convex tendon 21, increased and on every side spongy bone contact area and it is pressed between muscle in the groove, make that prosthese near-end incipient stability is fixed, long-term anti-rotation performance is stronger.In addition, can also micropore be set, be beneficial to bone and grow into, increase hold at near-end taper surface 2 or whole handle surface.The wedge-shaped design of near-end taper surface 2, upper coarse and lower fine, more and more tighter with being press-fitted of pulp cavity under pressure, make prosthese postoperative long-duration load more firm, and effectively prevent prosthetic loosening, sinking.

The above, it only is preferred embodiment of the present utility model, be not that this utility model is done any pro forma restriction, though this utility model discloses as above with preferred embodiment, any those skilled in the art, make a little change or be modified to the equivalent embodiment of equivalent variations when the technology contents that can utilize above-mentioned announcement, all still belong in the scope of technical solutions of the utility model.

Claims

1. a vertical slot handle hip prosthesis comprises cervical region, near-end taper surface, distal bone cadre and sub warhead end, it is characterized in that sagittal plane, coronalplane and the cross section of described cervical region is conical design.

2. vertical slot handle hip prosthesis according to claim 1 is characterized in that the two sides of described near-end taper surface are provided with convex tendon.

3. vertical slot handle hip prosthesis according to claim 2 is characterized in that described near-end taper surface two sides respectively are provided with 2-8 bar convex tendon.

4. vertical slot handle hip prosthesis according to claim 1 is characterized in that the upper base of the upper end cross section of described cervical region is 6.1-6.9mm, and going to the bottom is 7.2-8.0mm, high 12-12.5mm; The upper base of lower end cross section is 10.1-13.4, goes to the bottom greater than upper base 0.1-1.2mm high 20.1-26.6mm.

5. according to the described vertical slot handle of the arbitrary claim of claim 1-4 hip prosthesis, it is characterized in that described near-end taper surface is provided with surface micropore.

6. vertical slot handle hip prosthesis according to claim 5 is characterized in that the blunt transition of described near-end taper surface periphery circle.

7. according to the described vertical slot handle of the arbitrary claim of claim 1-4 hip prosthesis, it is characterized in that the blunt transition of described near-end taper surface periphery circle.