Artificial hip stem with low elasticity modulus

Abstract

The invention relates to an artificial hip stem with low elasticity modulus, which comprises a head part, a neck part and a stem body, wherein the stem body is designed into a hollow structure, and the surface of the stem body is provided with a plurality of holes or a mesh structure to make sure that the hollow part inside the stem body is kept communicating with the outside. Before implantation, the hollow part of the stem body is filled with autologous or xenogenous crushed bone particles; after external bone tissues grow with the crushed bone particles filled into the stem body into a whole, the total elasticity modulus can be approximate to that of human bone so as to lastingly and effectively prevent the loose action between the artificial hip stem and sclerotin.

Description

technical field [0001] The invention relates to a low elastic modulus artificial hip joint femoral handle. Background technique [0002] Artificial hip replacement surgery has become a relatively common surgical operation in the medical field, but the metal materials used are mostly stainless steel, titanium alloy, cobalt alloy, and biological ceramics are also used. Their common defect is that the elastic modulus is too high. High, such as titanium alloy is 110 ~ 120GPa, stainless steel and cobalt alloy is as high as 200GPa or more; while the elastic modulus of cortical bone and cancellous bone is only about 15GPa and 1.5GPa respectively. The elastic modulus of metal materials or ceramic materials is more than ten times or even dozens of times that of bone tissue. The mechanical properties of the implant prosthesis made of the above materials cannot match the bone tissue, and the high elastic modulus will make the implant false. Too little load on the surrounding bone tiss...

AI Technical Summary

Problems solved by technology

[0002] Artificial hip replacement surgery has become a relatively common surgical operation in the medical field, but the metal materials used are mostly stainless steel, titanium alloy, cobalt alloy, and biological ceramics are also used. Their common defect is that the elastic modulus is too high. High, such as titanium alloy is 110 ~ 120GPa, stainless steel and cobalt alloy is as high as 200GPa or more; while the elastic modulus of cortical bone and cancellous bone is only about 15GPa and 1.5GPa respectively

The elastic modulus of metal materials or ceramic materials is more than ten times or even dozens of times that of bone tissue. The mechanical properties of the implant prosthesis made of the above materials cannot match the bone tissue, and the high elastic modulus will make the implant false. Too little load on the surrounding bone tissue leads to bone resorption, bone atrophy, and disuse osteoporosis, which eventually leads to loosening of the prosthesis

Images