Baidas Laila Fawzi, Al-Kawari Huda Mohammad, Al-Obaidan Zhara, Al-Marhoon Aqeelah, Al-Shahrani Sawsan
Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, Riyadh, Saudi Arabia,
College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Clin Cosmet Investig Dent. 2018 Aug 20;10:179-187. doi: 10.2147/CCIDE.S161164. eCollection 2018.
Based on the evidence of the embryonic origin of the sella turcica and the teeth, this retrospective study evaluated the association between sella turcica bridging and palatal canine impaction in skeletal Class I and Class II orthodontic patients.
Sixty-two orthodontic patients with palatally impacted canines and 54 controls with erupted canines (aged 12-25 years) were classified into skeletal Class I and Class II (according to ANB angle and Wits analysis). The length, depth, and diameter of the sella turcica were measured, and the shape was described. The difference in linear dimensions between the study and control groups was calculated using two-way analysis of variance and Student's -test. The interrelationship of the variables, subject groups, skeletal type, and age, with the linear dimensions of sella turcica, was tested using regression analyses. The association between sella turcica, bridging and palatally impacted canines was determined in skeletal type using a chi-square test.
Highly significant differences were found in the length, diameter, and depth of the sella turcica between the study sample and the control (<0.001, =0.015, <0.0001, respectively). There was a highly significant frequency of bridging in cases with palatally impacted canines (<0.0001). An increasing incidence of bridging was found in subjects with palatally impacted canines and skeletal Class I (<0.0001) and Class II (=0.044) relationships. Regression analysis showed that the age was significantly related to a change in length (=0.025), diameter (<0.0001), and depth (<0.0001). The normal sella turcica morphology was present in most subjects (56.4%), and no significant association was found in subjects with palatally impacted canines in terms of the shape of the sella turcica.
Sella turcica bridging is frequently seen in patients with impacted canines. The findings suggest that careful monitoring of canine eruption is required in patients diagnosed with sella turcica bridging at an early age.
基于蝶鞍和牙齿胚胎起源的证据，本回顾性研究评估了骨骼I类和II类正畸患者中蝶鞍桥接与腭侧尖牙阻生之间的关联。
62例腭侧尖牙阻生的正畸患者和54例尖牙已萌出的对照者（年龄12 - 25岁）根据ANB角和Wits分析被分为骨骼I类和II类。测量蝶鞍的长度、深度和直径，并描述其形态。使用双向方差分析和学生t检验计算研究组和对照组之间线性尺寸的差异。使用回归分析测试变量、受试者组、骨骼类型和年龄与蝶鞍线性尺寸之间的相互关系。使用卡方检验确定骨骼类型中蝶鞍桥接与腭侧尖牙阻生之间的关联。
研究样本与对照组之间在蝶鞍的长度、直径和深度上发现了高度显著差异（分别为<0.001、=0.015、<0.0001）。腭侧尖牙阻生病例中桥接的频率非常高（<0.0001）。在腭侧尖牙阻生且骨骼为I类（<0.0001）和II类（=0.044）关系的受试者中发现桥接发生率增加。回归分析表明年龄与长度变化（=0.025）、直径（<0.0001）和深度（<0.0001）显著相关。大多数受试者（56.4%）呈现正常蝶鞍形态，在腭侧尖牙阻生的受试者中，就蝶鞍形态而言未发现显著关联。
蝶鞍桥接在尖牙阻生患者中常见。研究结果表明，对于早年诊断为蝶鞍桥接的患者，需要仔细监测尖牙萌出情况。
