The Size of the Sella Turcica in Skeletal Class I, Class II, and Class III using FACAD Software- South Indian Population Study

Abstract

Background: The sella turcica is a saddle-shaped bony structure in which anterior wall is formed by

tuberculum sellae and posterior wall is formed by dorsum sellae. Lateral cephalometric landmark, sella, is

of paramount importance in the field of orthodontics and dentofacial orthopaedics for diagnosis, treatment

planning and assessment of skeletal maturation. * Significant literature is available indicating that large

variations occur in the shape and size of sella turica among the three different types of skeletal malocclusion

classes.* Studies have been conducted in different regions to evaluate the shape and size of sella turcica in

different skeletal malocclusions therefore, the aim of this study is to describe the shape and measure the size

of the sella turcica in south Indian subjects with different skeletal types.

Materials and Methodology: Lateral cephalometric radiographs of 60 subjects (30 males and 30 females);

20 Class I, 20 Class II, and 20 Class III. The sella turcica on each lateral cephalometric was analysed

using FACAD ortho software tracing to measure the linear dimensions of length, depth, and anteroposterior

dimension. One-way analysis of variance was performed to study the relationship between skeletal type and

sella size.

Result: Skeletal class III subjects presented with a statistically significant difference in the depth of sella

turcica on comparison with skeletal class II (p>0.01). There was statistically insignificant difference found

in the anteroposterior dimension and length of sella turcica in skeletal class I, class II and class III.

Conclusion: When the size of sella turcica was compared with skeletal type, a statistically significant

difference was found in depth skeletal Class II and Class III subjects.