Suzuki Eduardo Yugo, Suzuki Boonsiva
Department of Orthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
Orthodontics (Chic.). 2013;14(1):e228-41. doi: 10.11607/ortho.982.
Distalization of the maxillary molars is an important treatment option for the correction of Class II malocclusions. The purposes of this study were to introduce the clinical application of the indirect Palatal miniscrew Anchorage and Distalization Appliance (iPanda) and to describe the dental and skeletal effects obtained with this innovative appliance.
Pretreatment (TO), post-distalization (T1), and posttreatment (T2) lateral cephalometric radiographs and dental casts of 20 consecutively treated adult patients (mean age 23.2 ± 4.7 years) with Class II molar relationship were analyzed. All patients were treated with the iPanda for maxillary molar distalization. The iPanda was anchored on a pair of midpalatal miniscrew implants to deliver the distalizing force to the maxillary first molars. The iPanda was the only appliance used during the distalization phase of treatment. A paired t test analysis was used to statistically assess the effects of treatment.
A Class I molar relationship was obtained in a mean period of 3.2 ± 0.6 months. Cephalometric analysis demonstrated that the maxillary first molars were significantly distalized by an average 4.5 ± 1.5 mm (P < .001) and were intruded by a mean of 1.0 mm ± 0.8 mm (P < .05). No significant change in the inclination of the first molars was observed. No significant change in the mandibular plane was observed. Dental model analysis demonstrated an asymmetric pattern of distalization between right (4.5 ± 2.2 mm) and left (3.1 ± 2.1 mm) first molars. The transverse width of the dental arch was maintained. No significant rotation of the first molars was observed.
This study demonstrated that the innovative iPanda is effective to bodily distalize the maxillary molars into a Class I molar relationship and to provide maximum anchorage.
上颌磨牙远中移动是矫治安氏II类错牙合的重要治疗方法。本研究旨在介绍间接腭部微螺钉支抗远中移动矫治器（iPanda）的临床应用，并描述使用这种创新矫治器所获得的牙齿和骨骼效应。
分析了20例连续治疗的安氏II类磨牙关系成年患者（平均年龄23.2±4.7岁）治疗前（T0）、远中移动后（T1）和治疗后（T2）的头颅侧位片和牙模型。所有患者均使用iPanda进行上颌磨牙远中移动。iPanda固定在一对腭中微螺钉种植体上，将远中移动力传递至上颌第一磨牙。iPanda是治疗远中移动阶段唯一使用的矫治器。采用配对t检验分析来统计评估治疗效果。
平均3.2±0.6个月获得了I类磨牙关系。头颅侧位片分析表明，上颌第一磨牙明显远中移动，平均4.5±1.5mm（P<.001），平均压低1.0mm±0.8mm（P<.05）。第一磨牙的倾斜度未见明显变化。下颌平面未见明显变化。牙模型分析显示，右侧（4.5±2.2mm）和左侧（3.1±2.1mm）第一磨牙远中移动存在不对称模式。牙弓的横向宽度保持不变。未观察到第一磨牙有明显旋转。
本研究表明，创新的iPanda能有效地将上颌磨牙整体远中移动至I类磨牙关系，并提供最大支抗。
