【摘要】 目的:探索舌刺及颏兜对安氏Ⅰ类前牙开早期矫治的作用机制。方法:检索关于舌刺及颏兜对安氏I类前牙开早期矫治的研究,经过筛选文献、提取资料并评价质量后,用Revman5. 3软件进行Meta分析。结果:共纳入6篇高质量研究。和对照组相比,实验组的ANB、SNA、SNB、SN. Go Gn、L6-MP(mm)和U6-PP(mm)的矫治前后变化值无明显差异(P> 0. 05);颏兜组的覆无明显变化,而固定舌刺、粘接舌刺+颏兜及活动舌刺+颏兜的覆明显增加,U1-NA(°)和L1-NB(°)减小,U1-PP(mm)和L1-MP(mm)增加(P <0. 05)。结论:单纯颏兜对安氏Ⅰ类前牙开早期矫治作用不大,而舌刺或配合颏兜通过上下前牙的舌倾和伸长能有效纠正开,但磨牙高度和颌骨位置无明显改变。更多还原

【Abstract】 Objective: To study the effects of the palatal spur and chincup in the early treatment of anterior open bite in patients with Angle class Ⅰ malocclusion. Methods: Electronic search was conducted to find studies about the effects of the palatal spur and chincup in the early treatment of anterior open bite in patients with Angle class Ⅰ malocclusion. Data extraction and risk of bias assessment of included studies were conducted. RevMan5. 3 software was used fore Meta-analysis. Results: 6 clinical trials were qualified to the Meta-analysis. Compared to the control group,there was no significant change of skeletal measurments after treatment( P> 0. 05),and no significant change in dental measurments in chincup group( P > 0. 05). While overbite,U1-PP( mm) and L1-MP( mm) were increased( P < 0. 05),U1-NA( °) and L1-NB( °) decreased( P < 0. 05) in the 3 groups of fixed palatal crib,bonded spur associated with the chincup and the removable palatal spur associated with the chincup. Conclusion: Chincup is not effective in the early treatment of the anterior open bite in patients with Angle class I malocclusion. But chincup combined with palatal spur or crib and have a positive effect on the closure of open bite through the palatal clination and extraction of the anterior teeth without influence of molar intrusion and skeletal change.更多还原