Crown Dimension in relation to Arch Perimeter, Arch Length and Arch Width in Ideal Occlusion: A Digital Model Study

Abstract

The purpose of this study was to investigate buccolingual and diagonal crown dimensions of the maxillary and mandibular arch in relation to arch perimeter, arch length and arch width groups. The sample consisted of 128 subjects ranging in age from 18 to 24 years. A Hirox digital stereomicroscope (SM) (HIROX KH7700 Japan) was used to construct digital models. A total of 10,752 variables were measured. Sex differences in the buccolingual and diagonal crown dimensions were explored. Analysis of variance (ANOVA) was applied to evaluate the differences between arch length, arch perimeter and arch width groups. Males had significantly larger mean values for buccolingual and diagonal crown dimension with than females (p d" 0.05) for both maxillary and mandibular arches. There were significant differences observed in large vs. small, average vs. small and average vs. large arch length groups (p d" 0.05) in both maxilla and mandible in relation to buccolingual and diagonal crown dimension. Our results indicate the buccolingual and diagonal crown dimension difference in relation to various arch length, arch perimeter and arch width group of maxilla and mandible. Thus it may be helpful for orthodontic case investigation and treatment.