Bone stretching instrument for early and medium femoral head necrosis treatment

Abstract

The invention discloses a bone stretching instrument for early and medium femoral head necrosis treatment. The bone stretching instrument comprises a front-section screw, wherein the front-section screw is connected with a femoral body; an outer fixing support is installed at the bottom of the femoral body through a fixing screw; the end, away from the femoral body, of the fixing screw penetrates through the outer fixing support and is in threaded connection with a nut; one end of the front-section screw is fixedly connected with a carrying screw assembly; the carrying screw assembly comprises a threaded screw assembly and a rack type screw assembly; the threaded screw assembly comprises a threaded screw; and one end of the front-section screw is fixedly connected with a threaded screw. The bone stretching instrument has the advantages that a bone column can be slowly and continuously stretched in the femoral neck direction, the traction tension can promote cell proliferation and biosynthesis functions, metabolism and tissue growth become active, the osteogenesis capability is enhanced, local microcirculation is also increased, and finally femoral head necrosis repair is promoted.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a bone distraction device used for the treatment of early and middle stages of necrosis of the femoral head. Background technique [0002] Treatment of osteonecrosis of the femoral head remains a challenge for orthopedic surgeons. Treatment methods for femoral head necrosis mainly include core decompression, porous tantalum rod implantation, vascularized bone grafting, hip replacement, and osteotomy. For patients with early and mid-stage femoral head necrosis, techniques such as core decompression, porous tantalum rod implantation, bone grafting, and osteotomy can be used for head-preserving treatment; however, for advanced femoral head necrosis, even if a satisfactory local Physiological and mechanical environment, also can not reverse the progression of the disease, most of them need hip replacement. Among them, the hip-preserving technique based on core decompressi...

AI Technical Summary

Problems solved by technology

However, the difficulty of revascularization and reossification in the necrotic area of ​​the femoral head is still relatively large. Clinically, cases of failure of the hip-preserving technique based on core decompression in the treatment of necrosis of the femoral head still occur from time to time, which brings great harm to the patients. physical and mental pain and financial burden

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