Liversidge H M, Molleson T I
Department of Paediatric Dentistry, St. Bartholomew's and The Royal London School of Medicine and Dentistry, Whitechapel.
J Forensic Sci. 1999 Sep;44(5):917-20.
Developing teeth are widely used to predict age in archaeology and forensic science. Regression equations of tooth length for age is a direct method, however, data for permanent teeth is incomplete. The aims of this study were: (a) to calculate regression equations predicting age from tooth length of all permanent teeth from birth to maturity, and (b) to evaluate the difference between radiographic and actual tooth length. The sample studied (N = 76, age range 0 to 19 years) was the Spitalfields juveniles of recorded age-at-death. Tooth length was measured from incisal tip to developing edge of crown or root of 354 dissected teeth. Data for upper and lower teeth were combined except for the lateral incisor. The least squares regression method was used to analyze the data for each tooth type; age being regressed against tooth length for prediction. For most tooth types, growth followed an S-shaped (polynomial) curve with initial fast growth and a further growth spurt around the time of mid root formation. No difference was found between radiographic and true tooth length. These regression equations provide an easy method of predicting age from any developing permanent tooth by measuring tooth length from isolated teeth or from unmagnified, undistorted radiographs.
正在发育的牙齿在考古学和法医学中被广泛用于预测年龄。根据牙齿长度计算年龄的回归方程是一种直接方法，然而，恒牙的数据并不完整。本研究的目的是：(a) 计算从出生到成熟所有恒牙的牙齿长度预测年龄的回归方程，以及 (b) 评估影像学牙齿长度与实际牙齿长度之间的差异。所研究的样本（N = 76，年龄范围0至19岁）是有记录死亡年龄的斯皮塔菲尔德青少年。从354颗解剖牙齿的切端到牙冠或牙根的发育边缘测量牙齿长度。除侧切牙外，上下牙齿的数据合并在一起。使用最小二乘法回归分析每种牙齿类型的数据；将年龄与牙齿长度进行回归以进行预测。对于大多数牙齿类型，生长遵循S形（多项式）曲线，最初生长迅速，在牙根形成中期左右有进一步的生长高峰。影像学牙齿长度与真实牙齿长度之间未发现差异。这些回归方程提供了一种简单的方法，通过测量孤立牙齿或未放大、未变形的X光片中的牙齿长度，从任何正在发育的恒牙预测年龄。
