Rate-Dependent Strain Generated Potentials in Ossointegrated Implant-Bone Composite
Osseointegration (OI) could be described as the modality for stable fixation of titanium implant to bone structure. The OI has become a realized phenomenon of importance in the dental and rehabilitation sciences since recently developed dentures and artificial limbs are directly attached to human skeleton by using osseointegrated (OI) implants. Previously, a study showed that bone strain generated potential (SGP) that is an electrical potential and considered to be generated by fluid flow in bone could be used as a parameter to examine the amount of OI on bone-implant interface. Since no study was performed to understand effects of loading rate changes on behavior of SGP for the bone-implant composite, rate dependent behavior of SGP was investigated in this study. Four different displacement rates, 100, 200, 500, and 1000 mm per minute were applied to the bone-implant composites. During the compression tests, SGPs were also measured. Magnitude of SGP was found to be significantly increased as the rate increased for OI bone-implant composite. In contrast, the time duration of SGP was decreased as the rate increased. These results could imply that the temporal SGP behavior of bone-implant composite is significantly affected by the loading rate.
J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang
J. H. Hong et al., "Rate-Dependent Strain Generated Potentials in Ossointegrated Implant-Bone Composite", Key Engineering Materials, Vols. 334-335, pp. 1173-1176, 2007