[双期阻断矫治器治疗安氏Ⅱ类1分类错牙合的疗效：12例患者的头影测量研究]
[Effect of Twin-block appliance in the treatment of Class II and division I malocclusion: a cephalometric study in 12 patients].
作者信息
Luo Ying, Fang Gang
机构信息
Medical College of Zhejiang University, Hangzhou 310006, Zhejiang Province, China.
出版信息
Shanghai Kou Qiang Yi Xue. 2005 Feb;14(1):90-3.
PURPOSE
To quantitatively evaluate the skeletal and dentoalveolar changes induced by Twin-block appliance for treatment of Class II,division I malocclusions in growing children.
METHODS
Twelve patients with Class II, division I malocclusions aged 10 to 12 years were investigated. The records were evaluated and compared with an age-matched sample of untreated Class II control subjects. The follow-up period was 12 months. Group t test was used for comparison.
RESULTS
In the treatment group, the upper incisors retroclination of the upper incisors and the mandibular forward movement contributed more to the overjet reduction. The skeletal and dental effects changes molar correction were almost similar. The mandibular growth in the treatment group was 2.29 mm, greater than that in the control group. The posterior facial height and the anterior lower facial height increased by 2.28 mm and 2.58 mm respectively. On the other hand, unfavorable vertical changes were not observed.
CONCLUSIONS
The treatment of Class II division I malocclusion with Twin-block appliance was effective in reducing overjet, correcting molar relationship and improving soft tissue profile. It can also enhance mandibular growth.
目的
定量评估 Twin-block 矫治器对生长发育期儿童安氏 II 类 1 分类错牙合畸形所引起的骨骼及牙-牙槽变化。
方法
对 12 例年龄在 10 至 12 岁的安氏 II 类 1 分类错牙合畸形患者进行研究。对记录进行评估，并与年龄匹配的未经治疗的安氏 II 类对照样本进行比较。随访期为 12 个月。采用成组 t 检验进行比较。
结果
在治疗组中，上切牙的后倾及下颌的前向移动对覆盖减小的贡献更大。骨骼及牙齿效应方面，磨牙关系的矫正情况几乎相似。治疗组下颌生长量为 2.29 mm，大于对照组。后面高和下前面部高度分别增加了 2.28 mm 和 2.58 mm。另一方面，未观察到不利的垂直变化。
结论
使用 Twin-block 矫治器治疗安氏 II 类 1 分类错牙合畸形在减小覆盖、矫正磨牙关系及改善软组织侧貌方面有效。它还能促进下颌生长。
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