本文从临床应用角度分析探讨下颌智齿牙冠与牙根形态之间的变化关系。收集18～35岁患者拔除的无龋坏、无磨损、无缺损的下颌智齿458颗。按正常形态和异常形态牙冠分为两组,其中大小形状正常、尖窝分明、纹理清晰的正常冠共246颗,过大过小形状特异、牙尖低平、沟窝纹理粗乱的异常牙冠194颗,观察各组牙根形态变化情况,单根及多根并拢或融合的牙根按无叉根分析。 This article from the perspective of clinical application analysis of mandibular wisdom teeth crown and root morphology changes between the relationship. 458 mandibular wisdom teeth were collected from 18 to 35-year-old non-carious, wear-resistant and defect-free patients. According to the normal morphology and abnormal morphology of the crown is divided into two groups, of which the size of normal shape, sharp foci, clear texture of the normal total of 246, too large and small shape-specific, low cusp, gouge texture disorder There were 194 dental crowns. The morphological changes of the root of each group were observed. The roots with single root and multiple roots or fusion were analyzed by no root.