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首页> 外文期刊>European journal of orthodontics >A comparative study of dental arch widths: extraction and non-extraction treatment.
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A comparative study of dental arch widths: extraction and non-extraction treatment.

机译：牙弓宽度的比较研究：拔牙和非拔牙治疗。

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The aim of this study was to determine the pre- and post-treatment width changes in the canine, premolar and molar regions in subjects treated with extraction of four first premolars, non-extraction, and non-extraction with rapid maxillary expansion (RME). Pre- and post-treatment orthodontic study models of 60 females (13.83 +/- 2.77 years) and 24 males (14.33 +/- 2.67 years) who underwent comprehensive orthodontic therapy were evaluated. Forty-two were treated non-extraction with fixed appliance therapy, 15 non-extraction with RME, and 27 with extraction of the first premolars. In addition to standard descriptive statistical calculations, one way ANOVA was used for comparison of the groups, and the post hoc Tukey multiple comparison test for comparison of the subgroups. The results revealed that the distance between the upper canines was not affected by the treatment modality. Upper premolar and molar arch widths increased more in the non-extraction subjects when compared with those with extractions, with the greatest increase in patients with RME. In the lower canine area the extraction group showed the widest arch width at the end of treatment. There was also a 0.60 mm decrease in the lower canine width in the non-extraction group. A decrease was found in lower inter-premolar and molar distances due to consolidation of the extraction spaces. When making a decision between non-extraction with maxillary expansion and extraction treatment modalities in borderline cases where there is constriction in the upper inter-premolar distance, apart from taking profile values into consideration, it should be borne in mind that expansion treatment can be helpful in achieving a wider arch form.
机译：这项研究的目的是确定对象的犬，臼齿和臼齿区域的治疗前和治疗后宽度变化，这些对象经拔除四个第一前臼齿，非拔除和非拔除并快速上颌骨扩张（RME） 。评估了接受全面正畸治疗的60位女性（13.83 +/- 2.77岁）和24位男性（14.33 +/- 2.67岁）治疗前后的正畸研究模型。 42例接受了固定矫治器的非拔牙治疗，15例未经RME的非拔牙治疗，27例中的第一个前磨牙的拔除。除了标准的描述性统计计算之外，还使用一种方差分析（ANOVA）来比较各组，并使用事后Tukey多重比较检验来比较各子组。结果表明，上犬齿之间的距离不受治疗方式的影响。与拔牙相比，非拔牙对象的上前磨牙和磨牙牙弓宽度增加得更多，RME患者的上颌前磨牙和磨牙弓宽度增加最多。在犬的下部区域，拔牙组在治疗结束时显示出最宽的足弓宽度。非拔牙组下犬齿宽度也减少了0.60 mm。由于提取空间的固结，在较低的前磨牙之间和磨牙之间的距离减小了。在上颌前磨牙间距离狭窄的边缘病例中，在决定不进行上颌膨出与拔牙治疗方式之间的决定时，除了考虑轮廓值外，还应牢记，扩容治疗可能会有所帮助实现更广泛的拱形。

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