Artificial femoral prosthesis capable of preventing postoperative loosening

Abstract

The invention provides an artificial femoral prosthesis capable of preventing postoperative loosening, which belongs to the technical field of orthopedic medical equipment and is used to solve the problem that artificial femoral prostheses loosen after femoral head replacement surgery. The prosthesis adopts a technical scheme that the front edge of an artificial prosthesis-fixing plate close to one end of a femoral lesser trochanter is provided with fixing screw holes; 1 to 3 fixing screw holes are symmetrically arranged on two sides of the central axis of the fixing plate; the positions of the fixing screw holes correspond to the cross section of a femoral wall; the back edge of the fixing plate close to a femoral greater trochanter is provided with fixing screw holes; and the positions of the fixing screw holes correspond to the femoral wall outside the greater trochanter. The prosthesis has the advantages that due to screw three-dimensional fixation on the greater and lesser trochanters, the better holding force of the prosthesis can effectively prevent the prosthesis from loosening and fracturing, ensures that the stress distribution of a prosthesis head towards a femoral shaft is more reasonable and closer to a physiological state, reduces too high local stress of the prosthesis and fractures caused by long-term too high local stress, prolongs the lifespan of the prosthesis, and delays revision time.

Description

technical field [0001] The invention relates to an artificial femoral prosthesis for performing femoral head replacement surgery, and belongs to the technical field of orthopedic medical equipment. Background technique [0002] Myeloid joints are load-bearing joints with complex forces in the human body. Many reasons can cause damage to the myeloid joints, including: 1. Trauma, any reason can cause joint trauma such as fractures; 2. Tumors around the myeloid joints; 3. Myeloid joint diseases Such as osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, etc., the highest incidence rate is osteoarthritis. [0003] The treatment of myeloid joint diseases can be divided into non-surgical treatment and surgical treatment. Artificial myeloid joint replacement is a common surgical treatment method. Artificial joint replacement is to repair the joint damage caused by disease or tumor, and use artificial materials to replace the necrotic femoral head and socket, so as to rel...

AI Technical Summary

Problems solved by technology

[0007] Prosthesis loosening can lead to soft tissue irritation symptoms, pain, limping, and can also lead to periprosthetic femoral fractures or prosthetic fractures. According to statistics, the incidence of femoral periprosthetic fractures after hip replacement is 0.1% to 2.1%. Revision surgery is required. In addition to the need for surgical revision in the above-mentioned cases, most scholars believe that once other symptoms appear in patients with artificial hip joint replacement, such as X-ray films showing interface absorption and loosening, or even rotational displacement and joint dislocation, they should be treated as soon as possible. Revision and replacement surgery was performed. Revision of artificial hip joint is still an important means to solve many problems after artificial hip joint replacement. According to the classification, bone mass and bone quality assessment, a good individualized prosthesis suitable for the patient is selected. Accurate operation, postoperative functional recovery according to the characteristics of the prosthesis, and close follow-up are the keys to ensure the curative effect after revision. However, some authors believe that the operation difficulty of repair with bone loss will increase. The curative effect is definitely worse than the first joint replacement, and the service life is shorter.

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