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