【摘要】 目的 :探讨头帽颏兜治疗早期骨型前牙反的效果。方法 :使用头帽颏兜 ,双侧共施加 70 0～ 10 0 0g的矫治力治疗早期骨型前牙反患者 136例 ,通过治疗前后模型 ,计算每一患者下颌相对于上颌位置变化的距离。分析 4个年龄组患者的下颌相对于上颌位置变化的距离、疗程及下颌相对于上颌位置变化的速度。结果 :C1、C2 、C3 组患者 (3～ 11岁 )疗效明显 ,C1组患者 (3～ 5岁 )疗程最短。结论 :应用头帽颏兜治疗早期骨型前牙反疗效明显。更多还原

【Abstract】 Objective: To analysis the effects of chincap therapy for early anterior crossbite and mandibular prognathism. Methods: 136 patients anterior crossbite and mandibular prognathism aged from 3 to 14 years old at the start of treatment were treated with active chincap with bilateral force of 700 to 1000 gram. Every patient wore chin cap 12 to 14 hours daily, and most of those patients used removable appliances to open the crossbite of incisors. According to the age of patients, they were divided into four groups, C\-1(3～5 years old), C\-2 (6～8 years old), C\-3 (9～11 years old) and C\-4 (12～14 years old). When the treatment ended after two years, we analysised the models by measuring the length of maxillary on the modles before and after treatment (U\-1 and U\-2 that′s the distance between the tip of \{1|1\} and the distal plane of \{6|6\} or \{Ⅴ|Ⅴ\} and the overjet before and after treatment (L\-1 and L\-2). Then we caculated the obtained distance for the mandible related to the maxillary position X(X=(L\-2 L\-1) (U\-2 U\-1)) and analysised treating time and mandibular retreating speed in the four groups. Results: The obtained distance for the mandible related to the maxillary position in C\-1, C\-2, C\-3 and C\-4 groups were 3 27±0 99 mm, 4 62±1 33 mm, 4 43±1 28 mm and 2 63±0 92 mm respectively, and the treating time in four groups were 8 92±2 66 months, 10 47±2 21 months, 13 07±2 00 months, 20 50±3 96 months respectively. The retreating speed of the mandible related to the maxillary position in the four groups were 0 37 mm/month, 0 44 mm/month, 0 34 mm/month and 0 13 mm/month respectively. The effects of the treatment in C\-1, C\-2 and C\-3 groups (3～11 years old) were remarkable, especially in C\-1 group (3～5 years old). Conclusion: The effects of chincap therapy for early anterior crossbite and mandibular prognathism were remarkable, especially for the very early crossbite patients.更多还原