CN2564124Y

CN2564124Y - Internal supporing device for femur

Info

Publication number: CN2564124Y
Application number: CN 02253005
Authority: CN
Inventors: 郭振芳; 李茂林; 董福慧; 孙捷; 肖正权
Original assignee: 郭振芳
Priority date: 2002-09-04
Filing date: 2002-09-04
Publication date: 2003-08-06
Anticipated expiration: 2012-09-04

Abstract

The utility model relates to a supporting device for treating femoral head necrosis, which can increase the treatment efficacy and improve the force bearing function of the femur. A femoral head inner supporting device is composed of a first part and a second part. The first part is composed of a circular arc shaped sheet and a hollow pipe connected together; small holes are arranged on the arc shaped sheet and on the side wall of the hollow pipe provided with mesopores. The second part is similar to a hollow screw whose back part is provided with external thread and whose front end is provided with concave holes in the centre, and is matched with and connected with the tail end of the hollow pipe of the first part; the tail end of the second part is provided with auxiliary screw holes. The utility model is used to treat femoral head necrosis.

Description

Eyelid retractor in the bone thigh head

Technical field

This utility model relates to a kind of capital eyelid retractor that femur head necrosis is treated usefulness.

Background technology

The most effective way of treatment femur head necrosis is exactly the prosthetic replacement at present.But because life-span of artificial joint falls short of and postoperative can produce some complication, for young patient, especially the patient below 40 years old and being not suitable in addition, has the patient of other complication also to be restricted to some.According to China's national situation, patient is still waiting to improve to the acceptance level of this operation.The method that is used to keep capital treatment femur head necrosis at present can be divided into four classes: 1, medulla decompression; 2, the implantation of free bone, band base of a fruit bone and blood vessel; 3, various osteotomy; 4, the intervention of Chinese medicine.These methods all are in order to improve capital blood fortune, to promote the absorption of necrotic bone and the generation of new bone, making the femoral head reparation.The basic pathology process of femur head necrosis is that the generation of new bone and the absorption of sequestrum exist simultaneously, and the outgrowth while of osteoblast when osteonecrosis is repaired, osteoclast activity also increases, and causes bone absorption.The area of new bone mechanical property of permineralization and plasticity is not lower; Between necrotic bone and the bone of living because the different stress concentration that produce of elastic modelling quantity.Brown T.D. studies have shown that, a necrotic bone thigh sequestrum and bone intersection osseous tissue alive descend 59%, intensity decreases 41% than the elastic modelling quantity of normal bone.Body biomechanics proves, when human locomotion, two peak values appear in capital joint reaction force, and wherein largest peaks reaches seven times of human body body weight.The powerful joint retroaction and the decline of femoral head mechanical property have caused collapse of the femoral head, cause hip joint to destroy, and finally cause deformity.Preventing that capital subsiding from should be the center of treatment femur head necrosis, also is the difficult point of this disease treatment.Above Therapeutic Method is to quicken the pathological process of femur head necrosis, promotes capital reparation, can not improve capital mechanical property, perhaps can make capital mechanical properties decrease.If do not have good non-heavy burden protection, just do not have due therapeutic effect.

Summary of the invention

The purpose of this utility model provides a kind of capital mechanical property of improving, to obtain eyelid retractor in the downright bad bone thigh head that better curative effect arranged of treatment strand head.

The purpose of this utility model realizes like this: eyelid retractor in the bone thigh head, and it is made up of first and second portion; It is characterized in that: first is formed by connecting by arc-like sheet and a hollow pipe of a circle; Aperture is arranged on the arc-like sheet, have on the sidewall of hollow pipe of mesopore little sky is also arranged; The similar hollow screw of second portion, there is external screw thread at its rear portion, and its front end central authorities are provided with shrinkage pool, and with the corresponding identical binding of tail end of the hollow pipe of first, the tail end of second portion is provided with auxiliary screw.

Above-mentioned design mainly is to utilize assistive device to take out a bone core to capital necrotic area with trepan from the lateral side of femur percutaneous, is similar to core decompression.And then with special long handle curet, further strike off sequestrum, at this moment in the first implantable bone tunnel with interior eyelid retractor, implant the normal bone tissues of taking out in the bone core at its periphery, under the guiding of guide needle, with special handle the second portion of interior eyelid retractor is screwed in, it have different length according to institute's palpus, both guaranteed secure support effect, do not exposed outside the bone again first.The operation use in conjunction that this apparatus also can be implanted with other blood vessel.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

As shown in Figure 1: it is made up of this utility model A of first and second portion B; The A of first is formed by connecting by arc-like sheet 1 and a hollow pipe 2 of a circle; Aperture 3 is arranged on the arc-like sheet 1, have also have on the sidewall of hollow pipe 2 of mesopore 4 little by empty 5; The second portion category-B is like a hollow screw, and there is external screw thread 6 at its rear portion, and its front end central authorities are provided with shrinkage pool 7, and with the corresponding identical binding of tail end of the hollow pipe 2 of the A of first, the tail end of second portion B is provided with auxiliary screw 8.Auxiliary screw B is used for being connected with the attached long handle propeller that helps apparatus and demountable.The mesopore 4 of interior eyelid retractor and the aperture of lateral margin the 3, the 5th for femoral head being become an open systems, are kept capital effect of easing stress.Another effect of its lateral margin aperture 3,5 is to allow new bone grow in the later stage, and femoral head is played reliable supporting role.

Claims

1, eyelid retractor in the bone thigh head, it is made up of first and second portion; It is characterized in that: first is formed by connecting by arc-like sheet and a hollow pipe of a circle; Aperture is arranged on the arc-like sheet, have on the sidewall of hollow pipe of mesopore little sky is also arranged; The similar hollow screw of second portion, there is external screw thread at its rear portion, and its front end central authorities are provided with shrinkage pool, and with the corresponding identical binding of tail end of the hollow pipe of first, the tail end of second portion is provided with auxiliary screw.