| Summary: | 碩士 === 國立成功大學 === 醫學工程學系 === 82 === The Co-Cr-Mo alloy implants with or without HA coating
implanted into the canine proximal femora intramedullarily.
The bones were harvested after time interval (12 ,24weeks) .
In this study,I investigated the effect of HA coated implants
on principal strain value and distribution over cortex, and
compare interfacial shear strength of implant with or without
HA coating. As bone ongrowth on the HA coated implants surface
after 12 and 24 weeks , femoral bending rigidity increase, the
mechanical axis strain reduces . In contrast,strain valve of
the uncoated implants have increaseed. The strain distribution
of the 24 weeks inplantation with HA coating is more even than
that of 12 week's. Shear strength by push-out test that after
period of 12 and 24 weeks implantation with HA coating is
about to 4.32 and 6.92 MPa. Strength for uncoateds implants of
0.38-0.48 MPa.
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