チタンインプラントにおける酸化被膜の厚さが骨形成に及ぼす影響

概要

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The present study examined the tissue responses to the different thickness of oxide layer on titanium implants in dogs. After machining, the implant specimens were oxidized in a furnace at 600℃ under atmosphere for 1 min and 30 min for experimental group I and group II, respectively. The implants without heat treatment were used as the control group. They were inserted into the mandibles of dogs and the peri-implant tissues were histologically observed. The results were as follows : 1. In the case of four weeks, group I acquired high-bone-contact support and showed the low tendency of fibrous tissue capsulization. 2. In the case of twelve weeks, experimental groups acquired durative bone formation when comparing with control group, but the difference between group I and II was not obvious. 3. In the dogs whose original trabecula density was coarse, experimental groups showed a tendency of higher bone contact ratio than control group. 4. Fibrous capsule was markedly observed in all groups. The degree of capsulation however was severer in control group and group II. From the foregoing results, increasing the titanium oxide layer on the surface of titanium implant suggested the possibility to promote the bone formation and the durative peri-implant tissue response when comparing with the surface oxide formed by room temperature.
九州歯科学会の論文
1998-02-25