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目的：探讨国人恒牙牙颈曲度的变化规律及其意义。方法：用牙科专用测量尺测量１４００个离体恒牙牙颈曲度。结果：国人恒牙牙颈曲度从前牙至后牙逐渐减小，而同一牙近中面大于远中面；下颌前牙牙颈曲度小于上颌前牙；并且国人牙颈曲度从前牙至后牙的近中远中差异均较外国人小；另外，部分后牙出现反向牙颈曲度。结论：牙颈曲度的大小是与牙齿外形、邻接点的位置和牙周附着有关，在临床操作中应加以注意
Objective: To investigate the regularity of cervical curvature of Chinese permanent teeth and its significance. METHODS: The dental curvature of 1400 isolated permanent teeth was measured with a dental gauge. Results: The cervical curvature of Chinese permanent teeth decreased from anterior teeth to posterior teeth, and the same middle and proximal face was larger than the far middle surface. The cervical curvature of anterior teeth of mandibular anterior teeth was smaller than that of anterior teeth of maxillary anterior teeth. Of the near-far differences are smaller than foreigners; In addition, some of the posterior teeth appear cervical curvature. CONCLUSIONS: The size of the cervical curvature is related to the shape of the tooth, the location of the adjacent point, and the attachment of the periodontal ligament, which should be noted in clinical practice