In Vivo Performance of a Modified CSTi Dental Implant Coating
Brooks J. Story, PhD, William R. Wagner, PhD, David M. Gaisser, MS, Stephen D. Cook, PhD.
Cylindrical dental implants coated with cancellous structured titanium (CSTi) were studied in a dog model. CSTi-2-coated and hydroxyapatite-coated (HA) implants were placed in 8 mongrel dogs. The porosity of the CSTi-2 coating was 9% less than that of the previously studied CSTi-1, resulting in greatly improved mechanical strength and cosmetic appearance. A slightly lower level of bone ingrowth was observed for CSTi-2 than for CSTi-1. However, the in vivo attachment strength of the CSTi-2 coating was comparable both to CSTi-1 and to an HA-coated control after 8 weeks. Measured porosity is technique dependent; digital analysis of in vitro samples yielded higher porosity values than in vivo histology cross sections. (INT J ORAL MAXILLOFAC IMPLANTS 1998;13:749–757) Key words: bone ingrowth, dental implant, osseointegration, porous coating, porous titanium