Sellar dimension in skeletal class II subjects with different growth patterns

Abstract

ObjectivesThe purpose of this study was to evaluate and compare size and shape of the sella in skeletal class II subjects with normodivergent, hypodivergent and hyperdivergent growth patterns. Materials/methodsStandardized pre-treatment lateral cephalograms of 90 patients (45 males and 45 females) were selected based on values of five parameters. The sample consisted of 3 groups (normodivergent, hypodivergent and hyperdivergent) having 30 subjects each. The measurements included width, height, length and width/height (W/H) ratio. Student's t-test was used to calculate the differences in sella measurements among males and females of the same group, while one-way analysis of variance was used to determine the relationship between sella measurements and skeletal pattern. W/H ratio was used to assess the shape of the sella turcica. Values of W/H ratio were divided into 3 equal ranges: average, horizontally elongated or flat, and vertically elongated shapes. The shape of the sella turcica in groups was studied with the chi – square test and post-hoc analysis. ResultsThe results showed that the W/H ratio was maximum for hypodivergent and minimum for the hyperdivergent group. (p = 0.000). The average shape of sella turcica was most common among all the groups. No significant difference in mean sella turcica length, width and height was found between the groups. The sella turcica length in males of hypodivergent group was significantly higher as compared to the females of the same group (p = 0.038). Conclusions/implicationsSella turcica shape and dimensions can be used for the future studies as reference when comparing the same with the skeletal growth pattern.