In this study, after implant pull-out tests using two kinds of surface treated implants in rabbit femurs, we performed using micro-CT, constitution of 100µn;m internal, structure of trabecular bone and measurement of bone mineral density in rabbit femur. The following results were obtained.
1. Structure of trabecular bone
Newly formed bone around implants was higher after 8 to 24 weeks with blasted than with machined. Although gradual increases in the structure of trabecular bone were observed, no significant differences in the newly formed bone between blasted and machined were detected after 24 weeks.
2. Measurement of the bone mineral density
The Bone mineral density of the newly formed bone gradually increased with both of surface treatment from 4 to 48 weeks. At each weeks, bone mineral density was higher with the blasted implant than with the machined implant.
Surface treatment of implant is factorial one letting control bone density and became clearly factor which had a large influence on bone quantity to acquisition and within 100$micron;m of osteointegration.
Keyword: Implant, Surface treatment, Titanium alloy, Bone mineral density, Micro-CT
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