The effects of palatal spur and chincup in the early treatment of anterior open bite in patients with Angle class Ⅰ malocclusion: A Meta-analysis / 实用口腔医学杂志

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.