目标:乳牙的牙冠尺寸数据具有人类学意义,法医,考古价值。然而,对于中国人口来说,这样的信息仍然很少。这项多中心研究旨在使用三维测量方法收集来自中国儿童的大样本乳冠数据,并分析其维度。
方法:共纳入1592例儿童乳牙样本,样本量是根据东北分布的,北,东,西北,西南和华南。从石膏牙科模型重建数字牙科模型。独立样本t检验,配对t检验,主成分分析(PCA),采用因子分析(FA)对牙冠尺寸进行分析。
结果:纳入1592名儿童的18,318颗乳牙。雄性表现出比雌性稍大的值。每次测量的性二态百分比的范围如下:中端直径(0.40-2.08),颊舌直径(0.13-2.24),和最大牙龈直径(0.48-3.37)。FA结果表明,冠尺寸变化的主要趋势是中远端的直径同时增加或减少,三个方向的颊舌径和上龈径。
结论:这是中国首次大规模的乳牙牙冠尺寸调查,乳牙测量数据的补充,为临床应用提供参考。
OBJECTIVE: Crown dimensions data of deciduous teeth hold anthropological, forensic, and archaeological value. However, such information remains scarce for the Chinese population. This multi-center study aimed to collect a large sample of deciduous crown data from Chinese children using three-dimensional measurement methods and to analyze their dimensions.
METHODS: A total of 1592 children\'s deciduous dentition samples were included, and the sample size was distributed according to Northeast, North, East, Northwest, Southwest and South
China. Digital dental models were reconstructed from plaster dental models. Independent sample t test, paired t test, principal component analysis (PCA), and factor analysis (FA) were used to analyze the tooth crown dimensions.
RESULTS: 18,318 deciduous teeth from 1592 children were included. Males exhibited slightly larger values than females. The range of sexual dimorphism percentages for each measurement was as follows: mesiodistal diameter (0.40-2.08), buccolingual diameter (0.13-2.24), and maxillogingival diameter (0.48-3.37). The FA results showed that the main trend of crown dimensions changes was the simultaneous increase or decrease in mesiodistal diameter, buccolingual diameter and maxillogingival diameter in three directions.
CONCLUSIONS: This is the first large-scale survey of deciduous tooth crown dimensions in
China, which supplements the data of deciduous tooth measurement and provides a reference for clinical application.