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目的探讨以下颌尖牙牙龄作为青春发育指标的可行性。方法对比２５８例北京地区９～１５岁、不同性别的患者在下颌尖牙牙根不同钙化期时腕骨相应的骨化状态。结果下颌尖牙牙龄与女性青春发育减速期及男性青春发育加速期骨龄的吻合率分别为８９．７％和９３．８％，而与男女其它各期骨龄的吻合率均低于５０％。结论临床矫治中以下颌尖牙牙龄作为青春发育指标，只能得出初步的评价。
Objective To investigate the feasibility of the mandibular canine age as an index of youth development. Methods 258 cases of Beijing patients aged 9 to 15 years old, different gender in the mandibular canine root calcification corresponding calcification corresponding ossification. Results The anastomosis rates of mandibular canine deciduas were 89.7% and 93.8%, respectively, compared with those of females and their females. However, their anastomosis rates with those of other age groups were all less than 50%. Conclusions In clinical treatment, the mandibular canine age as the index of youth development can only give a preliminary evaluation.