title: Evaluation of titanium plasma-sprayed and plasma-sprayed hydroxyapatite implants in vivo.
abstract: In this study, bone interfacial strength and bone contact length at the plasma-sprayed hydroxyapatite (HA) and titanium plasma-sprayed (TPS) implants were evaluated in vivo. Non-coated titanium (Ti) implants were used as controls. Cylindrical coated or non-coated implants (4.0mm diameter by 8mm long) were implanted in the dogs' mandibles. Loading of the implants was performed at 12 weeks after implantation. At 12 weeks after implantation (prior to loading) and 1 year after loading, implants were evaluated for interfacial bone-implant strength and bone-implant contact length. No significant differences in interfacial bone-implant strength for all groups at 12 weeks after implantation and after 1 year loading in normal bone were found. However, bone contact length for HA implants was significantly higher than the TPS and Ti implants for both periods tested (12 weeks after implantation and 1 year after loading). It was concluded that TPS implants exhibited similar pull-out strength compared to the HA implants. In addition, the lower bone contact length on the TPS surface compared to HA surfaces did not affect the interfacial bone-implant strength for both implants.
authors.affiliation: Health Science Center at San Antonio, University of Texas, Restorative Dentistry, Division of Biomaterials, MSC 7890 7703, Floyd Curl Drive, San Antonio, TX 78229-3900, USA. ong@uthscsa.edu
authors.forename: Joo L
authors.initials: JL
authors.lastname: Ong
authors.forename: David L
authors.initials: DL
authors.lastname: Carnes
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Bessho
mesh_terms: D000336:Aerosols / Q000737:chemistry; D000818:Animals; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D004285:Dogs; D017886:Durapatite / Q000737:chemistry*; D019544:Equipment Failure Analysis; D006358:Hot Temperature; D020007:Implants, Experimental; D008297:Male; D008334:Mandible / Q000166:cytology* / Q000502:physiology* / Q000601:surgery; D008422:Materials Testing; D016348:Osseointegration / Q000502:physiology*; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry*
chemical_list: D000336:Aerosols; D020099:Coated Materials, Biocompatible; D017886:Durapatite; D014025:Titanium