Bone response to radio frequency sputtered calcium phosphate implants and titanium implants in vivo

The objective of this study was to evaluate the effect of radio frequency s puttered calcium phosphate (CaP) coatings of titanium (Ti) implants on the bond strength at the bone-implant interface and percent bone contact length . Cylindrical coated or noncoated implants (4.0-mm diameter by 8-mm long) w ere implanted for 3 and 12 weeks. At 3 weeks after implant placement, the u ltimate interfacial strengths for as-deposited CaP-coated and heat-treated Cap-coated implants were 2.29 +/- 0.14 MPa and 1.28 +/- 0.04 MPa, respectiv ely. These ultimate interfacial strength values at 3 weeks were statistical ly greater than the mean ultimate interfacial strength for control Ti impla nts (0.67 +/- 0.13 MPa). At 12 weeks after implant placement, no statistica l differences in the mean ultimate interfacial strengths were observed betw een the as-deposited CaP-coated, heat-treated CaP-coated, and control Ti im plants. Histomorphometric evaluation indicated greater percent bone contact lengths for the as-deposited CaP-coated implants compared with the heat-tr eated CaP-coated and control Ti implants 3 and 12 weeks after implant place ment. (C) 2001 John Wiley & Sons, Inc.