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目的 观察恒牙列早期下颌后缩型安氏Ⅱ1类错牙合的治疗效果。方法 选取 16例处于恒牙列早期的下颌后缩型安氏Ⅱ1错牙合患者 ,用方丝弓矫治器联合颌斜面导板对其矢状向、垂直向及横向不调进行治疗 ,治疗前后拍摄头颅定位侧位片进行测量并做统计学分析。结果 治疗后磨牙关系中性 ,前牙覆牙合覆盖正常 ,下颌后缩面型得到改善 ,头影测量的相关项目治疗前后有显著性差异。结论 下颌后缩型安氏Ⅱ1类错牙合在恒牙列早期治疗可以取得疗效。
Objective To observe the therapeutic effect of early mandibular reduction Class Ⅱ 1 malocclusion in permanent dentition. Methods Twenty - six patients with mandibular retrusion type Ⅱ malocclusion under permanent dentition were enrolled in this study. They were treated with square wire appliance combined with maxillary oblique guide plate in sagittal, vertical and transverse directions. Before and after treatment, Cephalometric lateral radiographs were measured and analyzed statistically. Results After treatment, the relationship between molars was neutral, the anterior teeth covered the normal coverage, the mandibular recoil was improved, cephalometric measurements related items before and after treatment were significantly different. Conclusions The treatment of mandibular retrusion type Ⅱ division malocclusion with permanent dentition can be effective in the early treatment.