The shape and size of sella turcica in skeletal Class I, Class II, and Class III Saudi subjects”
The purpose of this study was to describe the shape and measure the size of the sella turcica in Saudi subjects with different skeletal types. Lateral cephalometric radiographs of 180 individuals aged range 11-26 years were taken and distributed according to skeletal classification; 60 Class I, 60 Class II, and 60 Class III. The sella turcica of each radiograph was analyzed and measured to determine the shape of the sella, in addition to the linear dimensions of length, depth and diameter. Student’s t-test was used to calculate differences in linear dimensions, while a one-way ANOVA was performed to study the relation between skeletal type and sella size.
The results show that sella turcica presented with a normal morphology in the majority of subjects (67%). No significant differences in linear dimensions between genders could be found. When age was evaluated, significant differences was found between the older age group (15 years >) and the younger group (11-14 years) at the 0.01 and 0.001 levels in length, depth, and diameter. The sellar sizes of the older age group were larger than the younger age. When skeletal type was compared with sella size, a significant difference was found in the diameter of sella between Class II and Class III subjects (P < 0.01). Larger diameter values were present in skeletal Class III subjects, while smaller diameter sizes were apparent in Class II subjects (multiple comparison tests). When gender, age, and skeletal type, were all compared with the size of the sella (regression analyses), age was
significantly related to a change of length (P < 0.01) and diameter (P < 0.001).
The sella shape and dimensions reported in the current study can be used as reference standards for further investigations involving the sella turcica area in Saudi subjects.