The analysis of correlation between facial width and mesiodistal width of maxillary anterior teeth

Esthetics is one of the prosthetic treatment goals. Correct selection of anterior teeth، regarding size and appearance، results in a successful treatment. Using the extra oral indicators is a common method to determine the size of the tooth. In this study، the correlation between the facial widths (in bizygomatic and intercondylar areas) and the mesiodistal width of maxillary central incisors was analyzed. A cross-sectional study was conducted on 100 qualified students، 50 females and 50 males. Two facial widths comprising Intercondylar width -distance between two approximately Beyron hinge axis- and bizygomatic width -two most convex points of zygomatic arch- were marked and measured by a facebow and a digital caliper. Mesiodistal maxillary central incisors’ widths were measured by a digital caliper. The collected data were analyzed via Pearson correlation coefficient. The mesiodistal width of right central incisor was 8. 47±0. 56. The mesiodistal width of left central incisor was 8. 54±0. 64. The bizygomatic width was 126. 15±6. 74. The intercondylar width was 131. 43±5. 41. There was no correlation between bizygomatic width and central incisors (P>0. 05) and a weak correlation between intercondylar width and central incisors in Iranian community. Facial width is not recommended as a suitable landmark for estimating the mesiodistal width of maxillary central incisors.