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学科主题口腔医学
Randomized clinical trial comparing control of maxillary anchorage with 2 retraction techniques
Xu, Tian-Min3; Zhang, Xiaoyun3; Oh, Hee Soo1; Boyd, Robert L.1; Korn, Edward L.4; Baumrind, Sheldon1,2
刊名AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS
2010-11-01
DOI10.1016/j.ajodo.2009.12.027
138期:5
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Dentistry, Oral Surgery & Medicine
研究领域[WOS]Dentistry, Oral Surgery & Medicine
关键词[WOS]ORTHODONTIC TREATMENT ; ADULT
英文摘要

Introduction: The objective of this pilot randomized clinical trial was to investigate the relative effectiveness of anchorage conservation of en-masse and 2-step retraction techniques during maximum anchorage treatment in patients with Angle Class I and Class II malocclusions. Methods: Sixty-four growing subjects (25 boys, 39 girls; 10.2-15.9 years old) who required maximum anchorage were randomized to 2 treatment techniques: en-masse retraction (n = 32) and 2-step retraction (n = 32); the groups were stratified by sex and starting age. Each patient was treated by a full-time clinic instructor experienced in the use of both retraction techniques at the orthodontic clinic of Peking University School of Stomatology in China. All patients used headgear, and most had transpalatal appliances. Lateral cephalograms taken before treatment and at the end of treatment were used to evaluate treatment-associated changes. Differences in maxillary molar mesial displacement and maxillary incisor retraction were measured with the before and after treatment tracings superimposed on the anatomic best fit of the palatal structures. Differences in mesial displacement of the maxillary first molar were compared between the 2 treatment techniques, between sexes, and between different starting-age groups. Results: Average mesial displacement of the maxillary first molar was slightly less in the en-masse group than in the 2-step group (mean, -0.36 mm; 95% CI, -1.42 to 0.71 mm). The average mesial displacement of the maxillary first molar for both treatment groups pooled (n 5 63, because 1 patient was lost to follow-up) was 4.3 +/- 2.1 mm (mean +/- standard deviation). Boys had significantly more mesial displacement than girls (mean difference, 1.3 mm; P < 0.03). Younger adolescents had significantly more mesial displacement than older adolescents (mean difference, 1.3 mm; P < 0.02). Conclusions: Average mesial displacement of the maxillary first molar with 2-step retraction was slightly greater than that for en-masse retraction, but the difference did not reach statistical significance. This finding appears to contradict the belief of many clinicians that 2-step canine retraction is more effective than en-masse retraction in preventing clinically meaningful anchorage loss. (Am J Orthod Dentofacial Orthop 2010; 138: 544.e1-544.e9)

语种英语
WOS记录号WOS:000283801700015
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/57830
专题北京大学口腔医学院_牙周科
北京大学口腔医学院_口腔正畸科
作者单位1.Univ Pacific, Sch Dent, Dept Orthodont, San Francisco, CA 94115 USA
2.Univ Pacific, Sch Dent, Craniofacial Res Instrumentat Lab, San Francisco, CA 94115 USA
3.Peking Univ, Sch & Hosp Stomatol, Dept Orthodont, Beijing 100871, Peoples R China
4.NCI, Biometr Res Branch, NIH, Rockville, MD USA
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Xu, Tian-Min,Zhang, Xiaoyun,Oh, Hee Soo,et al. Randomized clinical trial comparing control of maxillary anchorage with 2 retraction techniques[J]. AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS,2010,138(5).
APA Xu, Tian-Min,Zhang, Xiaoyun,Oh, Hee Soo,Boyd, Robert L.,Korn, Edward L.,&Baumrind, Sheldon.(2010).Randomized clinical trial comparing control of maxillary anchorage with 2 retraction techniques.AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS,138(5).
MLA Xu, Tian-Min,et al."Randomized clinical trial comparing control of maxillary anchorage with 2 retraction techniques".AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS 138.5(2010).
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