Lateral retention:
Lateral retention:
发布时间：2025-02-21 19:25:27
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答案：侧壁固位, 在口腔修复学中,侧壁固位是各类洞形最基本的固位形。它要求窝洞有足够深度,呈底平壁直的盒状洞形。相互平行,与洞底垂直,并具一定深度的侧壁,借助于洞壁和充填体的摩擦力而产生固位作用,防止充填体沿洞底向侧方移位。如果洞底呈圆弧形,当充填体一侧受力时,充填体会出现翘动、脱落。
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