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目的:了解西宁地区人群下颌第三磨牙形态特征,为临床诊疗提供科学依据。方法:收集122个西宁地区人群下颌第三磨牙,对牙齿的全长、冠长、根长、近中远中径、颊舌径、牙尖数目和牙根数目等进行测量并进行统计学分析。结果:西宁地区人群中下颌第三磨牙全长、冠长及颊舌径男女之间有统计学差异(P<0.05),牙尖型和牙根型存在正相关关系。结论:西宁地区人群下颌第三磨牙形态变异较大,不同地区人群牙齿形态存在差异。
Objective: To understand the morphology of mandibular third molars in Xining area and to provide a scientific basis for clinical diagnosis and treatment. Methods: The mandibular third molars of 122 Xining peoples were collected and their total length, length, root length, mesiodistal median diameter, bucco-lingual diameter, number of cusps and root number were measured and statistically analyzed. Results: There was a significant difference in the total length, crown length and buccal diameter between the male and female third molar teeth in Xining area (P <0.05). There was a positive correlation between the cusp shape and root type. Conclusion: There is a great variation in the morphology of mandibular third molars in Xining area. There are differences in tooth morphology between different regions.