【摘要】 目的评价应用MRC训练器改正各类不良习惯以及治疗早期安氏Ⅰ、Ⅱ、Ⅲ类错畸形患者的效果。方法选择257例早期错畸形患者,男118例,女139例,年龄3～12岁,平均年龄7.6岁,其中安氏Ⅰ类86例、安氏Ⅱ类126例和安氏Ⅲ类45例。根据患者年龄和错畸形类型,选择性使用MRC矫治器系列中的Infant、T4K、i2和i3系列。患者戴用MRC软质矫治器约4～6个月,根据不良习惯改正情况和错改善情况,换用硬质矫治器至治疗结束。用SPSS 22.0软件对治疗效果进行统计学处理。结果大部分患者的不良习惯均得到改正,因不良习惯引起的错畸形也有明显改善。对3类安氏错畸形治疗的有效率分别为83.52%,82.54%和55.56%,其中对安氏Ⅰ类和安氏Ⅱ类错畸形的治疗效果差异无统计学意义(P=0.495),对安氏Ⅲ类错畸形的治疗效果明显不如安氏Ⅰ类和安氏Ⅱ类,且差异具有统计学意义(安氏Ⅰ类和安氏Ⅲ类比较,P=0.002<0.01,安氏Ⅱ类和安氏Ⅲ类比较P=0.001<0.01)。结论MRC肌功能训练器在各类不良习惯的破除和早期错畸形的干预中有一定作用更多还原

【Abstract】 Objective The aim of this study was to to explore the effect of MRC trainer on changing oral bad habits and treating early Angle’s class I、II and III malocclusions. Methods 257 patients with early malocclusion were recuited including 118 males and 139 females. These participants age were from 3 years old to 12 years old, and with the average age of 7.6. Among the 257 patients, 86 patients were diagnosed as Angle’s class I malocclusions, 126 patients were diagnosed as Angle’s class II malocclusions, 45 patients were diagnosed as Angle’s class III malocclusions. According to patients’ age and malocclusion types, different types of MRC trainer system(infant,T4 K, i2, i3 series) were selected. After treating with the MRC soft trainer for about 4 to 6 months, the MRC soft trainer could be replaced by the MRC hard trainer according to improvement of habits correction and malocclusion. SPSS 22.0 was used for statistical analysis in the present study. Result Most of the patients’ oral bad habits have been corrected and the malocclusions due to oral bad habits had been significantly improved The effective rate of the three classes of Angle’s malocclusions were 83.52%,82.54% and 55.56%, resepectively. There are no significant statistical difference in treatment effects between Angle’s class I and class II malocclusions(P=0.495), However, the improvement in patients with Angle’s class III malocclusions was less than that in Angle’s class I and class II malocclusions Moreover, significant statistical differences were observed between Angle’s class I and class III malocclusions(P=0.002<0.01) between Angle’s class II and class III malocclusions(P=0.001<0.01). Conclusion MRC trainer is suitable for correcting several kinds of oral bad habits and treating early malocclusions.更多还原