使用混合型Hyrax-面罩组合进行上颌前牵引

Maxillary protraction using a hybrid hyrax-facemask combination.

作者信息

Nienkemper Manuel, Wilmes Benedict, Pauls Alexander, Drescher Dieter

机构信息

University of Düsseldorf, Department of orthodontics, Moorenstr, 5, 40225 Düsseldorf, Germany.

出版信息

Prog Orthod. 2013 May 20;14(1):5. doi: 10.1186/2196-1042-14-5.

BACKGROUND

The aim of this in study was the evaluation of treatment outcomes after using a hybrid hyrax-facemask combination in growing class III patients.

METHODS

Treatment of 16 children (mean age 9.5±1.3 years) was investigated clinically and by means of pre- and post-treatment cephalograms. Changes in sagittal and vertical, and dental and skeletal values were evaluated and tested for statistically significant differences.

RESULTS

All mini-implants remained stable during treatment. Mean treatment duration was 5.8±1.7 months. There was a significant improvement in skeletal sagittal values: SNA, +2.0°; SNB, -1.2°; ANB, +3.2°; WITS appraisal, +4.1 mm and overjet, +2.7 mm. No significant changes were found concerning vertical skeletal relationships and upper incisor inclination. In relation to A point, the upper first molars moved mesially about 0.4 mm (P=0.134).

CONCLUSIONS

The hybrid hyrax-facemask combination seems to be effective for orthopaedic treatment in growing class III patients. Unwanted maxillary dental movements can be avoided due to stable skeletal anchorage.

背景

本研究的目的是评估在生长发育期的III类错颌患者中使用混合式扩弓器-面罩联合矫治器后的治疗效果。

方法

对16名儿童（平均年龄9.5±1.3岁）进行了临床研究，并通过治疗前后的头影测量片进行分析。评估矢状向、垂直向以及牙齿和骨骼数据的变化，并检验其是否存在统计学上的显著差异。

结果

治疗过程中所有微型种植体均保持稳定。平均治疗时间为5.8±1.7个月。骨骼矢状向数据有显著改善：SNA角增加2.0°；SNB角减小1.2°；ANB角增加3.2°；WITS值增加4.1 mm，覆盖增加2.7 mm。垂直向骨骼关系和上切牙倾斜度未发现显著变化。相对于A点，上颌第一磨牙近中移动约0.4 mm（P = 0.134）。