The aim of this study was to find the correlation coefficient between mesiodistal width of permanent lower incisors and permanent canine and premolars for each quadrant, to establish equations for prediction of the sum of canine and premolars based on the sum of the lower incisors for the population of the Republic of Srpska as well as to compare the results with the values provided by Moyers's and Tanaka-Johnston's analysis and detremine sexual dimorphizm in tooth size. We analyzed 100 (50 male and 50 female) subjects with permanent dentition and class I molar relationship. The mesiodistal width of the lower permanent incisors, upper and lower canines and premolars were measured using a vernier caliper with the accuracy of 0.1 mm. The results show that for all groups of teeth, there is a significant difference (p <0.001) between mesiodistal width in male and female subjects. A linear regression equations are developed for the upper jaw (female y = 0.5276x +9.9756 and male y = 0.5927 x +8.986) and the lower jaw (female y = 0.489x+10.215 and male y =0.633x +7, 5636). We concluded that values provided by Moyers's and Tanaka-Johston's analysis do not coincide with the values of the population of the Republic of Srpska, but they can be clinically applied, with caution to females.
