Lamas Cátia, Lavall Asela, Pinho Teresa
J Clin Pediatr Dent. 2018;42(3):240-246. doi: 10.17796/1053-4628-42.3.14. Epub 2018 Apr 26.
Assess whether the permanent maxillary canine (MC) has a natural tendency to erupt mesially in children with maxillary lateral incisors agenesis (MLIA), compared to children without agenesis.
This retrospective, observational, cross-sectional study consisted of children between 5 and 12 years old divided into three groups: the first group with unilateral MLIA, in which an intraindividual analysis was performed, the second group presented bilateral MLIA, and the third group with patients without agenesis. These last two groups were matched for comparison interindividual, being pared by sex and maturation of the MC.
The canine position in the horizontal sector showed a clear mesial positioning of the MC on the agenesis side in individuals with unilateral MLIA (group 1) when compared with the counter lateral side; and in individuals with bilateral MLIA (Group 2) compared with control Individuals without agenesis (group 3). Even with the maintenance of this deciduous tooth in the dental arch, the MC keeps its tendency to mesial eruption.
There is a greater tendency for mesial angulation of the maxillary canine in patients with MLIA, regardless of the presence or absence of deciduous lateral incisor.
评估与无牙胚缺失的儿童相比，上颌侧切牙先天缺失（MLIA）的儿童中，上颌恒尖牙（MC）是否具有向近中萌出的自然倾向。
这项回顾性、观察性横断面研究纳入了5至12岁的儿童，分为三组：第一组为单侧MLIA，进行个体内分析；第二组为双侧MLIA；第三组为无牙胚缺失的患者。后两组按性别和MC的成熟度进行匹配，以便进行个体间比较。
在水平方向上，与对侧相比，单侧MLIA个体（第1组）无牙胚缺失侧的MC明显向近中定位；与无牙胚缺失的对照个体（第3组）相比，双侧MLIA个体（第2组）的MC也有同样表现。即使牙弓中乳牙保留，MC仍保持向近中萌出的倾向。
无论乳牙侧切牙是否存在，MLIA患者的上颌尖牙向近中倾斜的倾向更大。
