In molar group, the attenuations of the retention at different depths of undercut are similar, the retentions of the clasp still rank as, from great to less, 0.75 mm, 0.50 mm and 0.25 mm, in the depth of undercut.
英
美
释义
磨牙组卡环固位力衰减趋势比较相似 ,最终固位力仍以 0 75mm倒凹组者最大 ,0 2 5mm倒凹组卡环固位力最小。
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