evaluation of crown mesiodistal diameter of permanent teeth

the aim of this study was to evaluate mesiodistal diameter of permanent teeth and evaluating it's distribution in iran. in current study, 850 plastery impressions or 16590 teeth were precisely measured by a digital coulis with 0.01 mm accuracy.the obtained measures of the permanent teeth are shown in table 1. table (4) demonstrates the symmetry of left and right maxillary and mandibular teeth. obtainedmeasurements in table 1 were compared with gran's measures (table 2) which are shown in table (3).bolton analysis was done and results were found close to the boltype text or a website address or translate a document.ton measures. it was concluded that it is better to replace measurements of our society instead of bolton's. since we found minor difference with the measures of other researchers, especially for teeth anterior to first molar, using our measures in treatment plans would not bring about any problem.