University of são Paulo, São Paulo.
J Appl Oral Sci. 2004 Jun;12(2):164-70. doi: 10.1590/s1678-77572004000200016.
The purpose of this investigation was to comparatively evaluate the cephalometric changes in soft and hard tissues related to treatment of Class II, division 1 malocclusion with activator-headgear and Bionator appliances. Twenty-four individuals formed the activator-headgear group and twenty-five comprised the Bionator group, while other twenty-four presenting the same malocclusion did not receive any intervention and served as controls. Lateral headfilms were taken at the beginning and at the end of the observation period and were digitized with computerized cephalometrics; cephalometric analysis was performed and the results were submitted to statistical test. According to the methodology employed, our findings suggested that both appliances do not significantly alter the growth path, and also they were not able to modify the posterior inferior height and the sagittal and vertical position of the upper lip. The lower lip and the soft menton were only slightly modified by the orthopedic appliances, but the mentolabial sulcus showed a significant decrease in deepness compared to the control group. Of statistical significance, only the anterior inferior hard and soft facial heights and the lower lip height increased more in the treated groups.
本研究旨在比较分析使用肌激动器和双曲舌簧矫治器治疗安氏Ⅱ类 1 分类错（牙合）时软组织和硬组织的头影测量变化。24 名患者归入肌激动器组，25 名归入双曲舌簧矫治器组，另外 24 名具有相同错（牙合）畸形但未接受任何干预的患者作为对照组。在观察期的开始和结束时拍摄侧位头颅定位片，并使用计算机头影测量进行数字化；对头影测量分析的结果进行了统计学检验。根据所采用的方法，我们的研究结果表明，这两种矫治器都不能显著改变生长轨迹，也不能改变后下牙槽高度以及上唇的矢状和垂直位置。唇和软颏部仅被矫形矫治器轻微改变，但唇颏沟深度与对照组相比有显著减小。具有统计学意义的是，只有前下硬组织和软组织面高以及下唇高度在治疗组中增加更多。
