Tocci Luís Fernando Castaldi, da Silva Filho Omar Gabriel, Fuziy Acácio, Lauris José Roberto Pereira
UNIMAR.
Dental Press J Orthod. 2013 Jan-Feb;18(1):94-102. doi: 10.1590/s2176-94512013000100020.
This retrospective cephalometric study analyzed the influence of intentional ankylosis of deciduous canines in patients with Class III malocclusion and anterior crossbite, in the deciduous and early mixed dentition stages, treated by orthopedic maxillary expansion followed by maxillary protraction.
Lateral cephalograms of 40 patients were used, divided in 2 groups paired for age and gender. The Ankylosis Group was composed of 20 patients (10 boys and 10 girls) treated with induced ankylosis and presenting initial and final mean ages of 7 years 4 months and 8 years 3 months, respectively, with a mean period of maxillary protraction of 11 months. The Control Group comprised 20 patients (10 boys and 10 girls) treated without induced ankylosis, with initial and final mean ages of 7 years 8 months and 8 years 7 months, respectively, with a mean period of maxillary protraction of 11 months. Two-way analysis of variance and covariance analysis were applied to compare the initial and final cephalometric variables and the treatment changes between groups.
According to the results, the variables evidencing the significant treatment changes between groups confirmed that the intentional ankylosis enhanced the sagittal response of the apical bases (Pg-NPerp) and increased the facial convexity angles (NAP and ANB).
The protocol involving intentional ankylosis of deciduous canines enhanced the sagittal response of the apical bases.
本回顾性头影测量研究分析了乳牙期和早期混合牙列期III类错颌和前牙反颌患者，在接受正畸上颌扩弓后行上颌前牵引治疗时，乳牙故意粘连的影响。
使用40例患者的侧位头影测量片，按年龄和性别配对分为2组。粘连组由20例患者（10名男孩和10名女孩）组成，接受诱导粘连治疗，初始平均年龄为7岁4个月，最终平均年龄为8岁3个月，上颌前牵引平均时间为11个月。对照组包括20例患者（10名男孩和10名女孩），未接受诱导粘连治疗，初始平均年龄为7岁8个月，最终平均年龄为8岁7个月，上颌前牵引平均时间为11个月。应用双向方差分析和协方差分析比较初始和最终的头影测量变量以及组间治疗变化。
根据结果，显示组间有显著治疗变化的变量证实，故意粘连增强了根尖基骨的矢状向反应（Pg-NPerp），并增加了面部凸度角（NAP和ANB）。
涉及乳牙故意粘连的方案增强了根尖基骨的矢状向反应。
