Correlations of teleradiometric «skeletal and dento-skeletal» indices according to the Ricketts method with the sizes of teeth and dental arches in Ukrainian young men and young women with physiological occlusion without and with consideration of facial type

Abstract

The increasing prevalence of orthodontic pathology among adolescents necessitates a deeper analysis of morphological factors influencing the formation of the dentofacial system. Studying the relationships between maxillofacial structures and the dimensions of the dental arches taking into account the type of face is an important step towards early diagnosis and prevention of occlusion disorders. The aim of the study was to establish the features of correlations between «skeletal and dento-skeletal» teleradiometric indicators according to the Ricketts method with the dimensions of teeth and dental arches in Ukrainian young men and young women with physiological occlusion without and with the type of face. In 41 Ukrainian young men and 68 Ukrainian young women with physiological occlusion without and with Garson's facial type, teleradiometric «skeletal and dento-skeletal» parameters were determined by the Ricketts method (distances A-NPog, 6u-PTV, 1l-APog, 1u-APog, Xi-OcP and angles ANS-Xi-PM, Mand1-APog, Max1-APog), computed tomography dimensions of teeth and dental arches. Correlations between «skeletal and dento-skeletal» teleradiometric parameters and computed tomography dimensions of teeth and dental arches were assessed in the licensed package «Statistica 6.0» using nonparametric Spearman statistics. When analyzing reliable and medium-strength unreliable correlations between «skeletal and dento-skeletal» teleradiometric indicators according to the Ricketts method with the sizes of teeth and dental arches, it was established: in young men and young women, regardless of facial type, there were, respectively, 7.14 % (mostly direct medium-strength reliable) and 8.93 % (mostly direct medium- and weak-strength reliable) relationships with the sizes of teeth of the upper jaw, 6.79 % (mostly direct medium-strength reliable) and 11.07 % (mostly direct weak- and medium-strength reliable) relationships with the sizes of teeth of the lower jaw, and 9.03 % (mostly direct medium-strength reliable) and 19.44 % (mostly direct medium-strength reliable) with the sizes of dental arches; in young men and young women with a wide face type – respectively 12.86 % (mainly direct average strength unreliable) and 21.07 % (mainly direct average strength unreliable, inverse average strength reliable and unreliable) connections with the sizes of the teeth of the upper jaw, 15.36 % (mainly direct and inverse average strength unreliable) and 27.14 % (mainly inverse and direct average strength unreliable) connections with the sizes of the teeth of the lower jaw and 19.44 % (mainly inverse and direct average strength unreliable) and 24.31 % (mainly direct and inverse average strength reliable and unreliable) with the sizes of the dental arches; in young women with a very wide face type – 14.64 % (evenly direct and inverse average strength reliable and unreliable) connections with the sizes of the teeth of the upper jaw, 13.93 % (mostly inverse average strength reliable and unreliable) connections with the sizes of the teeth of the lower jaw and 27.78 % (mostly inverse average strength reliable and unreliable) with the sizes of the dental arches. In Ukrainian young men and young women with physiological occlusion, both without taking into account the type of face, and in representatives with a wide face type, pronounced manifestations of sexual dimorphism of the connections between «skeletal and dento-skeletal» teleradiometric indicators according to the Ricketts method and computed tomography sizes of the teeth and dental arches were established.