Acetabular cup is an important part of the artificial total hip replacement, the material should be selected with good biocompatibility and mechanical properties of the material of good quality. At present, the main choice of polyethylene, polyvinyl alcohol, zirconium oxide, aluminum oxide, titanium alloy, stainless steel, tantalum alloy and other materials.
2, the advantages of titanium alloy material acetabular cup
Titanium alloy is a kind of super corrosion-resistant, excellent biocompatibility and light weight material. Titanium alloys are often used in the manufacture of acetabular cups and femoral head replacement parts in artificial hip replacement surgery.
Acetabular cups made of titanium alloys are characterized by good sealing performance, resistance to wear and tear, corrosion resistance, and excellent toughness, all of which provide protection for the normal growth of human bone tissue. In addition, titanium alloy can withstand the potential corrosive environment of the human body, will not cause allergic reactions, the harm to human tissue is minimized, so it is suitable for use as high-end medical device materials.
3. Advantages and disadvantages of zirconia acetabular cups
Zirconia materials have unique biocompatibility and physical properties, and are often used in the medical field to manufacture high-end medical devices, such as artificial joints.
Zirconia acetabular cups have excellent wear resistance, low coefficient of friction, and good high-temperature mechanical properties, and their biocompatibility is even better than that of titanium alloy materials, which can better adapt to the requirements of human tissue.
The disadvantage is that zirconia material is prone to cracks, fatigue fracture and other problems, the treatment technology is very high, difficult and expensive, the use of a limited range.
4, the use of stainless steel material acetabular cup
Stainless steel material acetabular cup is the earliest application of a material, it has high mechanical strength, high hardness, wear resistance and other characteristics, and the price is low, it is a kind of widely used a material. At present, various types of alloy steel have been used to make acetabular cups in artificial hip joints.
However, the limitation of stainless steel artificial hip joints is that stainless steel is susceptible to corrosion in vivo, which may lead to calcification of the tissue laminae, causing secondary damage, and is also susceptible to allergic reactions, which may affect the therapeutic effect.