固定桥倾斜牙作基牙,其倾斜度的最低限度是A:10° B:20° C:30° D:40° E:45°

作者: tihaiku 人气: - 评论: 0
问题 固定桥倾斜牙作基牙,其倾斜度的最低限度是
选项 A:10° B:20° C:30° D:40° E:45°
答案 C
解析 倾斜牙作固定桥基牙时,主要困难是难于取得缺隙两端基牙固位体的共同就位道。基牙倾斜度过大时,为了取得共同就位道,牙体预备量过多,同时修复后基牙受力不能沿牙长轴方向,不利于基牙的健康。一般将其倾斜度的最低限度限制为30°。

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