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生物惰性陶瓷

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简述影响牙种植体骨结合的相关因素。

Which of the following is true of the holiday camp？_____
A: It is free of charge.
B: It lasts 12 days.
C: It is organized by Broughton.
D: It attaches little importance to ecology.

生物可降解与吸收高分子材料

钛及钛合金人工牙根的表面处理方法一般可分为____、_、_和____四大类。