论文部分内容阅读
目的 :比较肌激动器和Fr¨ankelⅡ (FRⅡ )型功能矫治器治疗安氏Ⅱ类 1分类错的效果。方法 :选择处于生长发育高峰期或高峰前期的患儿 34例 ,其中 12例用肌激动器矫治 ,2 2例用FRⅡ型矫治器矫治。所有患儿均为凸面型 ,上颌前突和 (或 )下颌后缩 ;ANB角≥ 5° ;磨牙及尖牙为远中关系。对比每个患儿矫治前后的模型和头侧位片并作统计学分析。结果 :矫治结束后所有患儿磨牙和尖牙均达到或接近中性关系 ,ANB角减小至正常范围。使用FRⅡ型矫治器组的患儿牙弓宽度比肌激动器组明显增加 ,而两组的基骨弓宽度无显著性差异。FRⅡ型矫治器使上切牙内收更显著 ,而肌激动器更能有效地控制下切牙的倾斜度。结论 :两种功能矫治器都能有效地改善上下颌骨及牙弓的Ⅱ类关系。
OBJECTIVE: To compare the effects of muscle exciters and Fr ¨ankel ¢ ò (FR ¢ ò) functional appliances in the treatment of Class 1 division 1 malocclusion. Methods: Thirty-four children were selected at the peak of growth or peak period. Twelve of them were treated with muscle excitement and twenty-two were treated with FR II appliance. All children were convex type, maxillary protrusion and / or mandibular retrusion; ANB angle ≥ 5 °; molars and canines for the far relationship. Before and after treatment of each model compared with the first lateral flap and make statistical analysis. Results: All the molar and canine teeth reached or approached the neutral relationship after the treatment, and the ANB angle decreased to the normal range. The dental arch width of children with FR ¢ ò appliance group was significantly higher than that of muscle exciters group, while there was no significant difference between the two groups. FR Ⅱ type appliance makes the upper incisor more significantly, while the muscle exciters more effectively control the inclination of the incisors. Conclusion: Both functional appliances can effectively improve the type Ⅱ relationship between the maxilla and mandible.