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EN
Dental implants were coated with hydroxyapatite (HA) by the sputtering technique. The influences of the HA film thickness on the bone stress distribution was investigated using the three-dimensional finite element analysis. In this analysis, force of 100 N axial load was applied on the non-coated, thickly HA coated, and thinly HA coated titanium implants The maximum equivalent bone stresses were 21.5, 8.55 and 6.33 MPa for the non-coated, thickly HA coated, and thinly HA coated cylinder type implants, respectively. The bone stress of the screw type implants was 29.0, 9.20 and 9.03 MPa, respectively. The maximum bone stress of the thinly HA coated implant was lower than in the other implants. Eight types of the implant shape for the thinly HA coated implant were also designed, and the tiered neck type implant showed the lowest maximum bone stress in all the types.
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