- Metal Ball and Polyethylene Liners
- Ceramic Ball and Polyethylene Liner
- Metal Ball and Metal Liner
- Ceramic Ball and Ceramic Liner
In these hip joints, the traditional metal ball and polyethylene liner are replaced by a high-strength ceramic bearing that has the reputation for ultra low wear performance. Clinical studies, monitored by the FDA and begun in 1998, have demonstrated excellent performance although it should be noted that ceramic has been used in hip replacements for many years prior to that.
Ceramic is the hardest implant material used in the body, and has the lowest wear rate of all, to almost immeasurable amounts (1000 times less than Metal-on-polyethylene). Consequently, there is usually no inflammation or bone loss, nor systemic distribution of wear products in the body. New ceramics offer improved strength and more versatile sizing options.