Relationship between sella turcica bridging and cephalometric parameters in adolescents and young adults

Objectives Sella turcica bridging occurs with fusion or calcification of the anterior and posterior clinoid processes in the middle cranial region. This study aimed to compare the cephalometric parameters among normal shape, partial bridge, and total bridge of the sella turcica in adolescent and young adult subjects. Methods This retrospective study was performed on the lateral cephalometric radiographs of 410 Turkish adolescent and young adult subjects. The subjects were divided into three groups: normal sella turcica shape (128 females, 32 males; mean age: 17.7 +/- 1.54 years), partial sella turcica bridge (129 females, 32 males; mean age: 17.8 +/- 2.15 years), and total sella turcica bridge (66 females, 23 males; mean age: 18.2 +/- 1.82 years). Thirteen angular and eight linear cephalometric measurements were performed using a cephalometric software program. The data were analyzed by one-way analysis of variance, and the Kruskal-Wallis test with the Bonferroni correction. Results Significant differences were found for Nperp-A distance, Nperp-Pg distance, and palatal plane-to-anterior cranial base angle among the groups (p < 0.016). There were no significant differences in the cephalometric parameters between the partial and total sella turcica bridging groups (p > 0.05). Conclusions This study evaluated a large amount of data for cephalometric measurements focusing on the degree of calcification of the sella turcica in adolescent and young adult subjects. The maxilla and mandible were located in a sagittally retrusive position in the partial and total sella turcica bridge subjects compared with the normal sella turcica shape subjects.