Hip Implant Prosthesis Material Classification
Nov. 16, 2019
The acetabular cup system hip prosthesis manufacturer shares the hip prosthesis material classification with you.
Total hip replacement is a type of prosthesis similar to the human skeleton that can replace the injured joint or joint surface due to disease or injury, relieve joint pain, correct prosthesis deformity and improve joint mobility. Now more and more applications in clinical. For patients who are going to have a hip replacement, or who are going to have a hip replacement later on, a very important moment is the choice of a hip prosthesis.
Currently, the commonly used materials for hip replacement implants are mainly metal materials, polyethylene materials and ceramic materials.
Metal materials: They are widely used in artificial joint materials because of their good mechanical properties, ease of processing and reliability. They are often used to make artificial joints that are complex in structure and must withstand great strength.
However, the materials used to make the metal friction surface are heavy metals, and the heavy metal ions that are worn out will not cause harm to the human body. There is no final conclusion yet.
Heavy metal ions may have an impact on fetal development in women of childbearing age who are pregnant with a baby. Because heavy metal ions are mainly excreted through the kidneys, patients with renal insufficiency should not be used.
Polyethylene material: It has ultra-high score and high wear resistance. It is used in the inner cup of bone cement type acetabulum or acetabulum. It is an ultra-wearing "plastic". However, the wear particles can induce macrophage reaction, leading to osteolysis, which is the main reason for the long-term loosening of the joint.
Ceramic materials: with good biocompatibility, ultra-high hardness, wear resistance and corrosion resistance, can solve the problem of bone dissolution caused by wear particles of metal and polymer prosthesis materials; The ceramic also overcomes the problem of the prosthetic releasing metal ions in the body.
Ceramic materials have good hydrophilic properties and can be used as joint implant to ensure the lubricity of joints. However, the problem of ceramic prosthesis breakage may occur during joint replacement, resulting in failure of the prosthesis.