hydroxyapatite

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hydroxyapatite (hy-droks-i-ap-ă-tyt) n.
1. the crystalline component of bones and teeth, consisting of a complex form of calcium phosphate.

2. a biocompatible ceramic material that is a synthetic form of natural hydroxyapatite. It is used to coat some joint replacement prostheses, which encourages bone to grow onto the implant, and is also used in some forms of middle-ear surgery.

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