Relation between craniofacial dimensions and anterior teeth size

Size and form of teeth is not only important for aesthetic, but also should be in harmony with other parts of face. When there is no record before tooth loss, determination of proper tooth size is one of the most important step of treatment. The purpose of this study was to determine correlation ratio of mesiodistal widths of anterior teeth with craniofacial dimensions. In this cross-sectional study 100 cases (50 males & 50 females) were selected from dentistry students. Maximum frontal width, maximum bizygomatic width, bigonial width and cranial width were measured by face bow. Mesiodistal width of anterior teeth was measured by digital vernier. For analysis of data Pearson correlation and multiple regression tests were used. Anterior Bolton ratio (78.76±2.8) was not significantly different from normal anterior Bolton ratio. Bizygomatic width and canine widths showed a significant relation (0.2-0.3) and also bigonial width and lower canine width had a significant relation (0.2-0.3). Proportions of bizygomatic width to upper centrals were 14.9 on right side and 14.7 on left side. A significant relation between upper and lower intercanine widths with bizygomatic and bigonial widths was found (p<0.05). Although there are different ways for prediction of tooth size, according to relation between some craniofacial and tooth widths, these craniofacial widths can be used for prediction of tooth size.