Buccal surfaceLingual surfaceMesial surfaceDistal surfaceOcclusal surfaceroot下颌第二磨牙 (Mandibular Second Molar)1）牙冠：合面可分为四尖型（无远中尖）和 五尖型 四尖型：发育沟呈“田”分布，占50% 发育沟呈“X”分布，占5% 五尖型：同下颌第...
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permanent mandibular second molar 永久下颔第二大臼齿
a mandibular second molar 下颌第二恒磨牙
mandibular second molar tooth 下颌第二恒磨牙
mandibular second permanent molar 下颌第二恒磨牙
second mandibular molar 下颌第二磨牙
Objective To investigate the displacements and the stress distributions of a mandibular second molar.
目的了解下颌第二恒磨牙不同载荷下近中移动时的位移及应力分布情况。
Abstract: Objective: To analyze the correlation between the eruption status of the mandibular third molar and the distal caries in the mandibular second molar.
摘要目的：研究下颌第三磨牙萌出状态与第二磨牙远中邻面龋坏的相关性。
Conclusion: Mandibular second premolar after pulling, the third molar eruption clearance increased obviously, conduce to the jaw third molar normal eruption.
结论：拔除下颌第二前磨牙后，第三磨牙萌出间隙明显增大，有助于下颌第三磨牙的正常萌出。
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