MRC矫治器结合肌功能训练对安式Ⅱ类错(牙合)畸形伴不良习惯的矫治效果

吴红

[摘要]目的 探讨MRC矫治器结合肌功能训练对安式Ⅱ类错（牙合）畸形伴不良习惯的矫治效果。方法 回顾性分析2017年5月～2019年5月沈阳市儿童医院接收的50例安氏Ⅱ类错（牙合）畸形伴不良习惯患儿的临床资料，将25例佩戴MRC矫治器并坚持做肌功能训练的患儿设为观察组，将25例佩戴MRC矫治器未进行肌功能训练的患儿设为对照组。比较分析两组患儿治疗前后的覆（牙合）覆盖变化、口腔不良习惯改善情况。结果 两组治疗前的覆（牙合）覆盖变化比较，差异无统计学意义（P>0.05）;观察组治疗后的口呼吸伴咬下唇、口呼吸、咬下唇均低于治疗前，且观察组治疗后的口呼吸伴咬下唇、口呼吸、咬下唇低于对照组，差异有统计学意义（P<0.05）;两组的不良习惯改善总成功率比较，差异无统计学意义（P>0.05）。结论 与单纯MRC矫治器相比，MRC结合肌功能训练的疗效更明显，可有效防治错（牙合）畸形，且安全性高，值得深入研究。

[关键词]儿童错（牙合）畸形;MRC矫治器;肌功能训练

[中图分类号] R783.5          [文献标识码] A          [文章编号] 1674-4721（2020）9（b）-0125-03

Correction effect of MRC appliance combined with muscle function training on Angle Class Ⅱ malocclusion with bad habits

WU Hong

School of Stomatology， Shenyang Medical College， Liaoning Province， Shenyang   110032， China

[Abstract] Objective To explore the correction effect of MRC appliance combined with muscle function training on Angle Class Ⅱ malocclusion with bad habits. Methods The clinical data of 50 cases of Angle Class Ⅱ malocclusion with bad habits in Shenyang Children′s Hospital from May 2017 to May 2019 were retrospectively analyzed. A total of 25 cases of children with MRC appliance combined with muscle function training were set as the observation group， and 25 cases of children without muscle function training were set as the control group. The changes of occlusal coverage and oral cavity habit improvement of children were compared between the two groups before and after treatment. Results There were no significant differences in the coverage changes before treatment between the two groups （P>0.05）. The mouth breathing of lower lip bite， mouth breathing， and lower lip of the observation group after treatment were lower than those before treatment， and the mouth breathing of lower lip bite， mouth breathing， and lower lip in the observation group were lower than those in the control group， the differences were statistically significant （P<0.05）. There was no significant difference in the total success rate of bad habits improvement between the two groups （P>0.05）. Conclusion Compared with the simple MRC appliance， the effect of MRC appliance combined with muscle function training is more obvious， and it can effectively prevent malocclusion， and safety is higher. It is worthy of further research.

[Key words] Malocclusion of children; MRC appliance; Muscle function training

錯（牙合）畸形的形成是由诸多不良口腔习惯或外界环境因素所致，如吮指、外伤、遗传、口腔疾病、吐舌或替牙障碍等。此类不良习惯均会导致患儿口腔肌肉功能障碍、上下牙弓（牙合）关系异常、牙齿排列不整齐、颌面部严重畸形等，对患儿的颌骨发育、牙齿牙列、咬合关系均造成了严重的困扰。因此，对于该口腔疾病，早期发现、早期诊断且早期给予治疗尤其重要[1-2]。以往针对此类患者多以功能性矫治器作为主要治疗手段，但存在椅旁操作时间久、制作复杂繁琐、异物感强及复诊次数多等不足，故临床中应用较少。在接……