Portland State University, Portland, Ore, USA.
Am J Orthod Dentofacial Orthop. 2010 May;137(5):605-14. doi: 10.1016/j.ajodo.2008.07.016.
Closure and long-term retention of anterior open bites are significant concerns for orthodontists and their patients. In this study, we investigated the efficacy of orofacial myofunctional therapy (OMT) for maintaining closure of open bites in conjunction with orthodontic treatment.
The sample included 76 subjects with dental anterior open bites referred for OMT before, during, or after relapse of orthodontic treatment. The experimental cohort consisted of 27 subjects who received OMT and orthodontic treatment or retreatment. The control cohort comprised 49 subjects who had a history of orthodontic treatment with open-bite relapse. Overbite was evaluated by an OMT professional or orthodontist 2 months to 23 years after removal of the fixed appliances. Measurements were compared with t tests.
Overbite relapse means were 0.5 mm (range, 0.0-4.0 mm) in the experimental group and 3.4 mm (range, 1.0-7.0 mm) in the control group, a difference that was clinically and statistically significant (P <0.0001).
This study demonstrated that OMT in conjunction with orthodontic treatment was highly effective in maintaining closure of anterior open bites compared with orthodontic treatment alone.
对于正畸医生及其患者而言，前牙开颌的关闭和长期保持是一个重大关注点。本研究旨在探讨口面肌功能治疗（OMT）在正畸治疗联合应用时对保持开颌关闭的效果。
本研究纳入了 76 例因正畸治疗复发前来接受 OMT 的前牙开颌患者。实验组包括 27 例接受 OMT 和正畸治疗或重新治疗的患者，对照组包括 49 例曾接受正畸治疗但出现开颌复发的患者。在固定矫治器去除后 2 个月至 23 年内，由 OMT 专业人员或正畸医生评估覆颌情况。采用 t 检验对测量结果进行比较。
实验组的覆颌复发均值为 0.5mm（范围，0.0-4.0mm），对照组为 3.4mm（范围，1.0-7.0mm），两组间差异具有临床和统计学意义（P<0.0001）。
本研究表明，与单纯正畸治疗相比，正畸治疗联合 OMT 对保持前牙开颌的关闭效果显著。
