engleski

Tooth size discrepancy among different malocclusion groups

An appropriate relationship of the mesiodistal widths of the maxillary and mandibular teeth favours optimal post-treatment results. The aims of the study were to determine whether there is a difference in the incidence of tooth size discrepancies among different skeletal malocclusion groups and if gender dimorphism exists. The dental casts and lateral cephalometric radiographs of 301 Croatian subjects (127 males and 174 females, mean age 16.86± 2.93) were selected from a larger sample of records of the archives of the Orthodontic Department, School of Dental Medicine, University of Zagreb Croatia. The subjects were from malocclusion groups according to Angle classification, with the corresponding skeletal characteristics. The mesiodistal dimensions of all teeth of each cast, from first molar to first molar were measured using digital callipers accurate to the nearest 0.1 mm. Statistical analysis was undertaken using the Kolmogorov-Smirnov, t, Scheffé’ s and one-way analysis of variance (ANOVA). A statistically significant gender difference was found in anterior ratio (p=0.017). A significant difference in the overall and posterior ratio was observed between Class II and Class III subjects. There was a tendency for mandibular tooth size excess in subjects with an Angle Class III malocclusion and maxillary tooth size excess in those with an Angle Class II malocclusion. The percentage of subjects with more than 2 standard deviations from Bolton’ s means for anterior and overall ratios was 16.28 and 4.32, respectively.

Bolton analysis; tooth size discrepancy

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