论文部分内容阅读
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。
The mechanism of acti-vator and activator combined with headgear (ACHG) in the treatment of patients with growth and development of skeletal class II malocclusion was compared by X-cephalometry analysis. Methods: There were 11 patients in Ac-tivator group, 5 males and 6 females, ACHG group, 12 patients, 4 males and 8 females. The ages are 10 to 13 years old male; female 9 to 12 years old, ANB angle greater than 5 °. Covering more than 7mm, the distal relationship between the posterior teeth, before and after treatment to collect X Qian head shadow measurement lateral view, the measurement of 28 items in the SAS statistical analysis software results were analyzed, the results: ① the two groups were inhibited the growth of the maxilla, ANB angle decreased, ACHG group more obvious changes, both groups of mandible were significant growth. (2) The mandibular plane angle of the group ofACHG was maintained, the group of face A obviously increased, there were differences between the two groups. In both groups, the upper incisors were adducted. In group A, the labial incisors were tilted, while the ACHG group remained unchanged. The maxillary molar in the ACHG group had a backward shift, while the A group remained unchanged. CONCLUSIONS: Activator's tooth compensatory changes are obvious, while ACHG relatively shows the obvious improvement of bony, and controls the mandibular plane angle and lip incline of the incisors. After all, one of the effective methods for the treatment of skeletal Class Ⅱ malocclusion during growth and development.