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目的:探讨第三磨牙存在状况与矢状骨面型的关系。方法:选取188例正畸患者,分析其X线曲面断层片和头颅侧位定位片,并测量ANB角的大小。结果:上颌较下颌更容易发生第三磨牙缺失,上颌右侧第三磨牙缺失率高于左侧。上颌第三磨牙全部缺失与下颌第三磨牙全部缺失患者的ANB角比较差异有统计学意义(P<0.05);第三磨牙全部存在与第三磨牙全部缺失患者ANB角比较差异有统计学意义(P<0.05)。结论:矢状骨面型的分类可能与第三磨牙存在状况有关,第三磨牙存在状况对错合畸形诊断和治疗方案确立可产生一定的影响。
Objective: To investigate the relationship between the presence of third molars and sagittal plane type. Methods: A total of 188 orthodontic patients were selected to analyze the X-ray surface slice and the cephalometric slice. The ANB angle was measured. Results: The third molar was more likely to occur in the maxilla than the lower jaw, and the third molar in the right maxilla was missing more than the left one. There was significant difference in the ANB angle between the third maxillary third molars and the third molars deletion (ANP) (P <0.05). There was significant difference in ANB between the third molars and the third molars P <0.05). Conclusion: The classification of sagittal bone surface may be related to the existence of the third molars. The presence of the third molars may have an impact on the diagnosis and treatment of the miscognition.