Janson Guilherme, Castello Branco Nuria, Aliaga-Del Castillo Aron, Henriques José Fernando Castanha, de Morais Juliana Fernandes
Department of Orthodontics, Bauru Dental School, University of São Paulo, Brazil.
Eur J Orthod. 2018 Apr 6;40(2):214-222. doi: 10.1093/ejo/cjx053.
The aim of this study was to compare the soft tissue changes and post-treatment status after complete fixed functional appliance non-extraction and maxillary premolar extraction treatment in patients with Class II division 1 malocclusion.
MATERIALS/METHODS: The sample consisted of 96 lateral cephalograms of 48 patients, divided into two groups. Group 1 consisted of 23 patients treated with fixed functional appliance associated with fixed appliances, with initial and final mean ages of 12.71 and 15.16 years, respectively, mean treatment time of 2.44 years and initial mean overjet of 6.83 mm. Group 2 comprised 25 patients treated with extraction of two maxillary premolars with initial and final mean ages of 13.05 and 15.74 years, respectively, mean treatment time of 2.67 years and initial mean overjet of 7.01 mm. t-Tests were used to compare treatment changes and the final cephalometric statuses between the groups.
According to the results, there was no inter-group difference regarding the soft tissue changes and post-treatment status.
The use of exclusively one type of fixed functional appliance in group 1 and performance of only one type of mechanics during space closure in group 2 were not always possible.
Late pubertal patients with Class II division 1 malocclusion treated with fixed functional appliances associated with fixed appliances present similar soft tissue results as two-maxillary premolar extraction treatments.
本研究旨在比较安氏II类1分类错牙合患者采用完全固定功能矫治器非拔牙矫治和拔除上颌前磨牙矫治后的软组织变化及治疗后状况。
材料/方法：样本包括48例患者的96张头颅侧位片，分为两组。第1组由23例采用固定功能矫治器联合固定矫治器治疗的患者组成，初始平均年龄和最终平均年龄分别为12.71岁和15.16岁，平均治疗时间为2.44年，初始平均覆盖为6.83mm。第2组由25例拔除两颗上颌前磨牙的患者组成，初始平均年龄和最终平均年龄分别为13.05岁和15.74岁，平均治疗时间为2.67年，初始平均覆盖为7.01mm。采用t检验比较两组间的治疗变化和最终头影测量状况。
根据结果，两组间在软组织变化和治疗后状况方面无差异。
第1组仅使用一种类型的固定功能矫治器，第2组在间隙关闭过程中仅采用一种类型的力学方法并非总是可行。
采用固定功能矫治器联合固定矫治器治疗的青春期晚期安氏II类1分类错牙合患者，其软组织结果与拔除两颗上颌前磨牙矫治相似。
