目的:建立人上颌第二磨牙三维有限元模型。
Objective: the three-dimensional finite element method models of the maxillary second molar was constructed.
目的:探讨上颌第二磨牙错?畸形的种类及相关因素。
Objective: to investigate the type of upper second molar malocclusion and its related-factors.
统计上颌第二磨牙错?畸形的患病率、分类及临床表现。
The prevalence, classification and clinical manifestation of upper second molars malocclusion were analyzed.
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