利用下颌第二磨牙钙化分期评价骨骼成熟度。
Skeletal maturation evaluation using mandibular second molar calcification stages.
机构信息
Department of Orthodontics, PDM Dental College and Research Institute, Sarai Aurangabad, Bahadurgarh, Haryana, India.
出版信息
Angle Orthod. 2012 May;82(3):501-6. doi: 10.2319/051611-334.1. Epub 2011 Sep 7.
OBJECTIVE
To investigate (1) the relationships between the stages of mandibular second molar calcification and skeletal maturity; and (2) whether second molar calcification stages can be used as a reliable diagnostic tool to determine skeletal maturity.
MATERIALS AND METHODS
Samples were derived from panoramic radiographs and lateral cephalograms of 300 subjects (137 males and 163 females) with ages ranging from 9 to 18 years, and estimates of dental maturity (Demirjian Index [DI]) and skeletal maturity (cervical vertebrae maturation indicators [CVMI]) were made.
RESULTS
A highly significant association (C* = 0.854 for males and 0.866 for females) was found between DI and CVMI. DI stage E corresponded to stage 2 of CVMI (pre-peak of pubertal growth spurt) and DI stages F and G corresponded to stages 3 and 4 of CVMI (peak of pubertal growth spurt). DI stage H was associated with stages 5 and 6 of CVMI (end of pubertal growth spurt).
CONCLUSION
A highly significant association exists between DI and CVMI. Mandibular second molar DI stages are reliable indicators of skeletal maturity.
目的
研究（1）下颌第二磨牙钙化阶段与骨骼成熟度之间的关系；以及（2）第二磨牙钙化阶段是否可作为确定骨骼成熟度的可靠诊断工具。
材料和方法
从 300 名 9 至 18 岁的受试者的全景片和侧位头颅侧位片获得样本，这些受试者的牙龄（Demirjian 指数 [DI]）和骨龄（颈椎成熟度指标 [CVMI]）均有估计。
结果
男性的 DI 和 CVMI 之间存在高度显著的相关性（C* = 0.854，女性为 0.866）。DI 阶段 E 对应于 CVMI 的 2 期（青春期生长突增前期），DI 阶段 F 和 G 对应于 CVMI 的 3 期和 4 期（青春期生长突增高峰期）。DI 阶段 H 与 CVMI 的 5 期和 6 期（青春期生长突增后期）有关。
结论
DI 与 CVMI 之间存在高度显著的相关性。下颌第二磨牙 DI 阶段是骨骼成熟度的可靠指标。
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