title: Mandibular bone response to plasma-sprayed coatings of hydroxyapatite.
abstract: 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.
authors.forename: H W
authors.initials: HW
authors.lastname: Denissen
authors.forename: W
authors.initials: W
authors.lastname: Kalk
authors.forename: H M
authors.initials: HM
authors.lastname: de Nieuport
authors.forename: J C
authors.initials: JC
authors.lastname: Maltha
authors.forename: A
authors.initials: A
authors.lastname: van de Hooff
mesh_terms: D000539:Alveolar Process / Q000502:physiology; D000818:Animals; D001672:Biocompatible Materials; D003799:Dental Stress Analysis; D004285:Dogs; D006882:Hydroxyapatites; D008334:Mandible / Q000502:physiology*; D014025:Titanium
chemical_list: D001672:Biocompatible Materials; D006882:Hydroxyapatites; D014025:Titanium