摘要
通过X线头影测量分析比较acti－vator,activator结合headgear（ACHG）治疗生长发育期骨性Ⅱ类错患者的作用机制。方法：Ac-tivator组患者11例，男5例，女6例，ACHG组，患者12例，男4例，女8例。年龄均为男10～13岁；女9～12岁，ANB角大于5°。覆盖大于7mm，后牙远中关系，收集治疗前后X钱头影测量侧位片，测量项目28项，在SAS统计分析软件中进行结果分析，结果：①两组上颌骨的生长均受到抑制，ANB角均减小，ACHG组变化更为明显，两组下颌骨均显著生长。②ACHG组下颌平面角得以保持，面A组明显增大，两组间有差异。③两组上切牙均内收，A组下切牙唇倾，而ACHG组保持不变，ACHG组上颌磨牙有后移，而A组不变。结论：Activator的齿代偿性变化明显，而ACHG则相对的表现出骨性改善的明显，且控制了下颌平面角及下切牙的唇倾度。不失为治疗生长发育期骨性Ⅱ类错的有效方法之一。
Toevaluate the effects of activator and activator headgear combination (AHGC) appliances on jaw bone and dentition of juveniles with class II. division 1 malocclusion.Method: Eleven patients (5 male, 6female) were treated with activator, twelve (4 male, 8 female)with AHGC appliance for 8-10months and for more than 14hs eachday. cephalograms were tak-en before and after treatment. Results: 1. ANB angle was significantly reduced and mandibulardevelopment was favouable in both groups. The AHGC appliance was more effective in reduction of marillary prognathism. 2. The cant of the mandibular plane remained stable in the patients treated with AHGC appliance, but increased with activator. 3. The for ward displacement of the up-per first molars was reduced. significantly and the axial inclination of the lower ineisors was controlled by AHGC appliance. Conclusion: 1. ACHG is more effective in the improvement of sagittal skeletal relationship than activator in the juveniles with class II division 1 malocclusion. 2. Unfavorable labial tipping of the lower incisors can be prevented by ACHG appliance.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
1999年第6期434-436,共3页
Journal of Practical Stomatology
基金
陕西省自然科学基金!95SW47
关键词
错HE
安氏Ⅱ类错He
矫治术
Angle class Ⅱ malocclusion
Activator appliances
Dental radiography
