Mandibular Bone Response to Plasma-Sprayed Coatings of Hydroxyapatite

Denissen, H. W.; Kalk, W.; de Nieuport, H. M.; Maitha, J. C.; van de Hooff, A.
January 1990
International Journal of Prosthodontics;Jan/Feb1990, Vol. 3 Issue 1, p53
Academic Journal
Sintered hydroxyapatite ceramic particles can be applied as a coating on a titanium substrate using a plasma-spraying technique. The biological and mechanical properties of implants with such a coating were studied in the mandible of a dog. The results indicated that a very strong and direct bonding between the hydroxyapatite coating and the mandibular bone developed. The shear strength of the bone/ceramic interface was higher than the interfacial strength between ceramic and titanium substrate. From the radiologic, macroscopic, and microscopic observations it was concluded that the biological properties of plasma-sprayed coatings of hydroxyapatite are the same as those of sintered hydroxyapatite ceramic. As a result of mechanical failure of the coherence of the hydroxyapatite particles at the outer layer of the coating, free particles of hydroxyapatite were observed in the surrounding bone tissue.


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