A CBCT Investigation of the Association between Sella-Turcica Bridging and Maxillary Palatal Canine Impaction

Table 4

Overall frequency of sella-turcica bridging based on 60% cut-.

Sella-turcica bridging	Left sella	Right sella
	(%)	(%)
Complete bridge (ratio = 0%)	5 (6.6)	6 (7.9)
Partial bridge (ratio > 0 and <60%)	39 (51.3)	33 (43.4)
No bridge (ratio ≥ 60%)	32 (42.1)	37 (48.7)
Total	76 (100)	76 (100)

cutoff point of 60% was chosen based on ratio of reported means 6.6 mm/10.70 mm (left and right interclinoid distance/length, resp.). The ratios are complete bridging (ratio = 0 mm), partial bridging (ratio greater than 0 but less than 60%), and no bridging (ratio at least 60%).