Bellini-Pereira Silvio-Augusto, Aliaga-Del Castillo Aron, Vilanova Lorena, Patel Mayara-Paim, Reis Rachelle-Simões, Grec Roberto-Henrique-da Costa, Henriques José-Fernando-Castanha, Janson Guilherme
DDS, MSc, Postgraduate Student. Department of Orthodontics. Bauru Dental School. University of São Paulo, Brazil.
DDS, MSc, PhD. Assistant Professor. Department of Orthodontics. University of Guarulhos, São Paulo, Brazil.
J Clin Exp Dent. 2021 May 1;13(5):e455-e462. doi: 10.4317/jced.57993. eCollection 2021 May.
To compare the maxillary dentoalveolar changes of patients treated with three distalization force systems: Jones Jig, Distal Jet and First Class appliances, using digitized models.
The retrospective sample comprised 118 digitized models of 59 patients with Class II malocclusion divided into three groups: Group 1 consisted of 22 patients treated with the Jones Jig appliance; Group 2 consisted of 20 patients treated with the Distal Jet, and Group 3 comprised 17 patients treated with the First Class appliance. Pretreatment and post-distalization plaster models of all patients were digitized and evaluated with OrthoAnalyzerTM software. The pretreatment and post-distalization variables regarding sagittal, rotational and transverse changes were compared by the One-way Analysis of Variance (ANOVA) and Kruskal-Wallis tests, depending on normality.
All appliances presented similar amounts of distalization. The Distal Jet appliance promoted significantly smaller mesial displacement of premolars and greater expansion of posterior teeth. The First Class presented the smallest rotation of the maxillary molars and treatment time.
The distalizers were effective in correcting Class II molar relationship, however, a palatal force seems to provide fewer undesirable effects. Additionally, the degree of rotation and expansion was associated with the side of force application. Malocclusion, Angle Class II, Orthodontics, Corrective, Distalizers.
使用数字化模型比较采用三种远移力系统（琼斯矫治器、远中喷射器和一类矫治器）治疗的患者上颌牙牙槽骨的变化。
回顾性样本包括59例安氏II类错牙合患者的118个数字化模型，分为三组：第1组由22例使用琼斯矫治器治疗的患者组成；第2组由20例使用远中喷射器治疗的患者组成，第3组由17例使用一类矫治器治疗的患者组成。所有患者治疗前和远移后的石膏模型进行数字化处理，并使用OrthoAnalyzerTM软件进行评估。根据正态性，通过单因素方差分析（ANOVA）和克鲁斯卡尔-沃利斯检验比较治疗前和远移后矢状、旋转和横向变化的变量。
所有矫治器远移量相似。远中喷射器矫治器使前磨牙近中位移明显较小，后牙扩弓较大。一类矫治器上颌磨牙旋转最小，治疗时间最短。
远移矫治器在纠正安氏II类磨牙关系方面有效，然而，腭向力似乎产生的不良影响较少。此外，旋转和扩弓程度与力的施力侧有关。错牙合，安氏II类，正畸学，矫治，远移矫治器。
