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首页> 外文期刊>American Journal of Orthodontics and Dentofacial Orthopedics >Outcomes of early versus late treatment of severe Class II high-angle patients
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Outcomes of early versus late treatment of severe Class II high-angle patients

机译：早期与严重二级高角度患者的晚期治疗结果

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Introduction:The aim of this work was to compare the skeletal and dental outcomes of 1- versus 2-phase treatment in Class II subjects with difficult-to-treat high-angle severe Class II malocclusions. Methods: The sample of 120 cases was collected from the private offices of 3 experienced clinicians. The following selection criteria were used: (1) ANB >= 6 degrees SN-GoGn >= 37 degrees or mandibular plane to Frankfort horizontal plane >= 30 degrees; and (3) overjet >= 6 mm. Patients were classified into either the early or the late treatment group according to dental age (early Tx: >= 5 primary teeth; late Tx: otherwise). Thirty-four angular, linear, and proportional measurements were determined for each patient. Statistical significance was assessed with the use of a 2-tailed t test, analysis of covariance test, and chi-square test. Results: The results showed that early 2-phase treatment for severe Class II high-angle patients offered no skeletal anteroposterior advantages over late 1-phase treatment. Severe high-angle Class II patients also showed similar dental anteroposterior outcomes with the use of both approaches. Vertically there was a higher frequency of increased mandibular plane angles and extrusion of upper incisors and lower molars in the late treatment group. Conclusions: Early 2-phase treatment for severe Class II high-angle patients offered no skeletal or dental advantage over late 1-phase treatment.
机译：介绍：这项工作的目的是将1次与2阶段治疗的骨骼和牙齿结果进行比较II类受试者，难以治疗高角度严重的II杀虫剂。方法：从3名经验丰富的临床医生的私人办公室收集120例案件的样本。使用以下选择标准：（1）ANB> = 6度SN-Gogn> = 37度或下颌飞机到法兰克福水平平面> = 30度; （3）超喷> = 6毫米。根据牙龄时期（早期TX：> 5次初级牙齿，患者分为早期或后期治疗组;否则换算）。针对每位患者确定三十四个角度，线性和比例测量。通过使用2尾T试验，协方差试验和Chi-Square测试评估统计学意义。结果：结果表明，严重二级高角度患者的早期2相治疗没有超过1相处理的骨骼前后优势。严重高角度II级患者还表现出类似的牙科前后转化剂，使用两种方法。垂直地存在较高的下颌平面角度和上部牙髓挤出和晚期治疗组的下门牙和较低臼齿的频率较高。结论：严重二级高角度患者的早期2相治疗在后期1相治疗中没有提供骨骼或牙科优势。

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