Yang Yi-ming, Chen Lin-ling, Liao Qian
Department of Orthodontics, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai Key Laboratory of Stomatology. Shanghai 200011,China.
Shanghai Kou Qiang Yi Xue. 2011 Jun;20(3):286-91.
To evaluate the difference of treatment on growing patients with Class II division 1 using various anteroposterior and vertical skeletal dysplasias.
Twenty-eight moderate to severe Class II division 1 malocclusion patients with Class I molar and canineocclusion after treatment were selected. The subjects were divided into 3 groups based on the initial ANB and FMA angles. Pre-treatment and post-treatment cephalograms were evaluated for soft and hard tissues changes after treatment. The data was analyzed using SPSS 12.0 software package.
ANB angle decreased in all three groups. Changes of ANB angle in group 2 and group 3 were greater than group 1(P<0.01). SNA angle decreased significantly in group 3(P<0.01). SNB angle increased significantly in group 1(P<0.01) and group 2(P<0.05). All groups had great maxillary incisors retraction and similar changes in mandibular incisor positions.Soft tissue index showed no significant difference among three groups before and after treatment(P>0.05). But nasolabial angle(P<0.05), soft tissue convexity(P<0.05) and Z angle(P<0.01) changed significantly in group 3.
Conventional orthodontic therapy successfully corrects Class II division 1 malocclusions in growing patients with the improvement of soft and hard tissues.The patients who initially have the most severe skeletal dysplasias can have the greatest changes in profile.
评估针对生长发育期Ⅱ类1分类错牙合畸形患者，采用不同前后向和垂直向骨骼发育异常进行治疗的差异。
选取28例治疗后为Ⅰ类磨牙及尖牙关系的中度至重度Ⅱ类1分类错牙合畸形患者。根据初始ANB角和FMA角将研究对象分为3组。对治疗前和治疗后的头影测量片进行评估，以观察治疗后软硬组织的变化。使用SPSS 12.0软件包对数据进行分析。
三组患者的ANB角均减小。第2组和第3组的ANB角变化大于第1组（P<0.01）。第3组的SNA角显著减小（P<0.01）。第1组（P<0.01）和第2组（P<0.05）的SNB角显著增大。所有组均有明显的上颌切牙后缩，下颌切牙位置变化相似。治疗前后三组软组织指标差异无统计学意义（P>0.05）。但第3组的鼻唇角（P<0.05）、软组织凸度（P<0.05）和Z角（P<0.01）变化显著。
传统正畸治疗成功矫治了生长发育期患者的Ⅱ类1分类错牙合畸形，软硬组织均得到改善。最初骨骼发育异常最严重的患者侧面轮廓变化最大。
