Cone-beam computed tomography analysis of the association between sella turcica bridging and palatally impacted canine

Gil, Soo-Min; Park, Jae-Sung; Kim, Sang-Cheol

J Korean Dent Assoc > Volume 59(1); 2021 > Article

ORIGINAL ARTICLE

The Journal of The Korean Dental Association 2021;59(1):8-19.
Published online December 31, 2020.

Cone-beam computed tomography analysis of the association between sella turcica bridging and palatally impacted canine

Soo-Min Gil¹

, Jae-Sung Park²

, Sang-Cheol Kim³

¹School of Dentistry, Graduate School of Wonkwang University
²Trust dental clinic
³Department of Orthodontics, School of Dentistry, Wonkwang University

Correspondence: Sang-Cheol Kim, Tel: +82-63-859-2962, Fax: +82-303-3440-2962,
Email: sangkim@wku.ac.kr

Received: 20 July 2020 • Revised: 17 September 2020 • Accepted: 8 October 2020

Abstract

The aim of this study was to analyze the association between sella turcica bridging (STB) and palatally impacted canine and to investigate the correlation between the angular measurements of palatally impacted canine and STB using cone beam computed tomography (CBCT). The impaction group included 36 subjects (16.97 ± 6.00 years) who had at least one palatally impacted canine and the control group consisted of 36 subjects (16.89 ± 3.52 years) who had normally erupted canines without any dental anomalies. Sella turcica and dental measurements were obtained from reconstructed CBCT images using OnDemand3D 1.0software. Sella turcica dimensions were compared between two groups, and the STB ratio, the proportion of interclinoid distance to diameter of sella turcica, were compared between the impacted and non-impacted sides. Correlation coefficients were cal-culated between the angular measurements of palatally impacted canine and STB ratio. In the impaction group, interclinoid distance and STB ratio were significantly smaller than those of the control group (p < 0.001). The distribution of STB type II, partial calcification of intercliniod ligaments, was significantly higher in the impac-tion group than in the control group (p < 0.05). However, there was no significant difference of STB between the impacted and non-impacted sides (p > 0.05) in the unilateral impaction group. Further, STB ratio was negatively correlated with the mesiodistal angulation and the buccolingual inclination of the palatally impacted canine (p < 0.05). The STB was more frequently found in patients with palatally impacted canine, and the degree of STB was significantly associated with the angular measurements of impacted canine.

Key Words: CBCT; Sella turcica bridging; Palatally impacted canine