Degradation of hydroxylapatite, fluorapatite and fluorhydroxyapatite - coating of dental implants in dogs

摘要

We investigated the degradation rate of dental implants with 50 and 100 mu m coatings of hydroxylapatite (HA), fluorapatite (FA) or fluorhydroxylapatite (FHA). The implants were inserted in dog jaws and retrieved for histological analysis after three, six and twelve months. They were embedded in PMMA, and sections were performed using a low speed diamond saw and were ground until a thickness of 30 mu m. The thickness of the calcium phosphate coatings was evaluated using an image analysis device. A relative resorption index and its standard deviation were studied.