The increase of crown/root ratio was mainly induced by EARR and alveolar crest loss, which lead to shorter clinical root and longer clinical crown.
冠根比增大主要由于牙根尖吸收和牙槽嵴吸收,导致临床根长变短,临床冠长增加而引起。
参考来源 - 正畸治疗中牙齿冠根比的变化及其影响因素的相关性分析·2,447,543篇论文数据，部分数据来源于NoteExpress
目的：通过对正畸关闭陈旧性磨牙间隙前后牙槽嵴高度的对比，探讨关闭陈旧性磨牙间隙是否加重牙槽嵴吸收。
Objective: To study if closing obsolete molar space could cause severe resorption of alveolar crest through comparing the height of alveolar crest before and after closing obsolete molar space.
结果在正中颌位大力咬合时，线性总义齿修复组颞肌前束肌电值高于解剖式总义齿修复组，尤以牙槽嵴吸收严重的患者最为明显（P<0.05）；
Results The peak value of anterior temporal muscle of linear occlusal dentures with severe resorption of residual ridge was higher than that of anatomic occlusal dentures ( P< 0.05 ).
目的：总结嵌贴式植骨方法进行缺牙后重度吸收牙槽嵴骨增量的植骨技术及其效果。
PURPOSE: TO summarize the techniques and effects of onlay bone grafts on the augmentation of the severely atrophic alveolar ridges.
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