Objective: Statistical analysis of mandibular molar mesiodistal crown width and tooth length and development of root.

Results: The geometric feature parameters of 28 artificial teeth in their own coordinates were obtained, including the mesiodistal and buccolingual dimension, the height and inclination of cusp.

Objective :In this study , regression equations (prediction equations) were established for the purpose of accurately predicting the mesiodistal widths of the crowns of unerupted lateral incisors .