The Determination of Teeth Size in Different Skeletal Jaw Relations by Using Cephalometric and Study Model Analysis

Abstract

Determination of size of teeth in complete denture may be difficult when preextraction records are not available as there is no universally acceptable method that can be used reliably.  This study is designed to find out the relationship between teeth size and different facial parameters in different skeletal jaw relations using different techniques like, cephalometry and study model analysis. The study sample consisted of randomly selected 150 subjects (50 subjects each of Angle’s class I, class II, class III skeletal classification) aged 18 years and above.  The parameters studied were anthropometric measurements, cephalometrty measurements and study model analysis. The obtained data was studied, analyzed statistically and correlated to obtain results. Student t-test and Pearson correlation coefficient were used to analyze the data using SPSS statistical package. Among the cephalometric parameters SN distance can be used as a reliable predictor for estimation of the maxillary anterior teeth width, Porion – Orbitale distance, ANS –PNS distance, Gonion –Gnathion distance can be used as a reliable predictor for estimation of the maxillary posterior teeth width and upper facial height can also be used as a reliable predictor for estimation of the maxillary anterior teeth length irrespective of different skeletal jaw relations.