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The effects of distalization of upper molars in class Ⅱ malocclusion by pendulum appliance
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNA OF STOMTAOLOGY
- Issue:
- 6
- DOI:
- 10.3760/j.issn:1002-0098.2000.06.004
- Key Word:
- 矫治器;磨牙;错(牙合)
Abstract： 目的 研究改良摆型矫治器对牙(牙合)和面部骨骼结构的影响.方法 选择安氏Ⅱ类错(牙合)16例,其中女13例,男3例,年龄9.3～22.8岁,平均13.6岁.采用摆型磨牙远中移动矫治器治疗.摆型矫治器推磨牙向远中的疗程为1～6个月,平均3.7个月.以X线头影测量分析和模型测量分析为测定手段.结果 ①每侧磨牙平均向远中移动3.59 mm,主要为磨牙向远中倾斜移动.②切牙牙冠平均向近中移动3.28 mm,主要为切牙的近中倾斜移动,前牙的覆盖增加,达1.56 mm.③牙列出现较大的间隙,双侧分别达6.70 mm和6.59 mm. ④磨牙垂直向移动较少,推磨牙后,磨牙平均伸长仅0.69 mm.⑤磨牙区、双尖牙区与尖牙区的宽度均增加,分别达2.03 mm、1.66 mm和1.10 mm.⑥摆型矫治器对面部骨骼结构无明显的直接影响.结论 摆型矫治器能有效地远中移动上颌磨牙,快速矫正磨牙关系.但也可导致磨牙倾斜及切牙唇向倾斜移动,临床治疗中应予注意.
- [1]J, Ghosh,R S, Nanda.Evaluation of an intraoral maxillary molar distalization technique.[J].1996,110(6).
- [2]J J, Hilgers.The pendulum appliance for Class II non-compliance therapy.[J].1992,26(11).
- [3]L, Bondemark,J, Kurol.Distalization of maxillary first and second molars simultaneously with repelling magnets.[J].1992,14.
- [4]张兴中,周彦恒,许天民,等.摆形磨牙远中移动矫治器的原理及临床应用[J].1999,(2).
- [5]A A, Gianelly,J, Bednar,V S, Dietz.Japanese NiTi coils used to move molars distally.[J].1991,99(6).
- [6]J F, Gravely.A study of need and demand for orthodontic treatment in two contrasting National Health Service regions.[J].1990,17.
- [7]W R, Proffit.Forty-year review of extraction frequencies at a university orthodontic clinic.[J].1994,64.
- [8]M M, Armstrong.Controlling the magnitude, direction, and duration of extraoral force.[J].1971,59(3).