Early treatment for Class II Division 1 malocclusion with the Twin-block appliance: A multi-center, randomized, controlled trial
Early treatment for Class II Division 1 malocclusion with the Twin-block appliance: A multi-center, randomized, controlled trial
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DOI：
10.1016/j.ajodo.2007.10.042
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发表时间：
2009-05-01
影响因子：
3
通讯作者：
Worthington, Helen
中科院分区：
文献类型：
--
作者：
O'Brien, Kevin;Wright, Jean;Worthington, Helen
前言：本研究的目的是评估双块矫治器早期正畸治疗II类1节错牙合的有效性。这是一项多中心、随机、对照试验，受试者来自英国14家正畸诊所。方法：研究对象为174例8 ~ 10岁ⅱ类ⅰ类错颌畸形儿童；他们被随机分配到接受双块矫治器治疗或初始未治疗的对照组。然后随访受试者，直到所有正畸治疗完成。最终的骨骼形态、就诊次数、正畸治疗持续时间、拔牙率、治疗费用和儿童的自我概念均被考虑在内。结果：在为期10年的研究结束时，141例患者完成治疗或接受闭塞治疗。数据分析显示，早期接受双块治疗的患者与在青春期接受1个疗程治疗的患者在骨骼模式、拔牙率和自尊方面没有差异。那些接受早期治疗的人比接受青少年治疗的人有更多的出勤率，接受治疗的时间更长，花费也更多。他们的最终牙咬合也明显较差。结论：8 - 9岁儿童双街区治疗与平均年龄12.4岁开始治疗相比没有优势。然而，患者在早期治疗的费用，在出席和器具磨损的时间增加。[J]中华口腔颌面矫正外科杂志；2009;35:573-9 .]
Introduction: The aim of this study was to evaluate the effectiveness of early orthodontic treatment with the Twin-block appliance for the treatment of Class II Division 1 malocclusion. This was a multi-center, randomized, controlled trial with subjects from 14 orthodontic clinics in the United Kingdom. Methods: The study included 174 children aged 8 to 10 years with Class II Division 1 malocclusion; they were randomly allocated to receive treatment with a Twin-block appliance or to an initially untreated control group. The subjects were then followed until all orthodontic treatment was completed. Final skeletal pattern, number of attendances, duration of orthodontic treatment, extraction rate, cost of treatment, and the child's self-concept were considered. Results: At the end of the 10-year study, 141 patients either completed treatment or accepted their occlusion. Data analysis showed that there was no differences between those who received early Twin-block treatment and those who had 1 course of treatment in adolescence with respect to skeletal pattern, extraction rate, and self-esteem. Those who had early treatment had more attendances, received treatment for longer times, and incurred more costs than the adolescent treatment group. They also had significantly poorer final dental occlusion. Conclusions: Twin-block treatment when a child is 8 to 9 years old has no advantages over treatment started at an average age of 12.4 years. However, the cost of early treatment to the patient in terms of attendances and length of appliance wear is increased. (Am J Orthod Dentofacial Orthop 2009; 135: 573-9)