Gülşilay Sayar, Hüsamettin Oktay


Purpose: The aim of this study was to compare the depth of curve of Spee in Class I, Class II and Class III malocclusions.

Materials and Methods: The samples were chosen among the diagnostic materials. Ninety plaster models were selected according to the inclusion criteria, and they were divided into three groups (n:30) according to Angle classification (Class I, II and III). The depth of curve of Spee was measured on the left and right sides of the mandibular dental cast and the mean values were used as depth of curve of Spee. ANOVA test was used to evaluate normally distributed data. Intragroup evaluations were performed by using paired sample t test. The level of significance was set at  p<0.05.

Results: Curve of spee was deepest in Class II malocclusion 2.9 ± 0.8 mm  and was flat in Class III malocclusion 2.1 ± 0.9 and the difference between them was statistically significant.

Conclusion: The sagittal orthodontic problems have an impact on curve of Spee.


Orthodontics; curve of spee; malocclusion; overjet; overbite



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