Pancherz H, Ruf S, Kohlhas P
Department of Orthodontics, University of Giessen, Germany.
Am J Orthod Dentofacial Orthop. 1998 Oct;114(4):437-46. doi: 10.1016/s0889-5406(98)70190-8.
In 98 Class II Division 1 malocclusions treated with the Herbst appliance "effective condylar growth" (a summation of condylar remodeling, glenoid fossa remodeling, and condylar position changes within the fossa) and its influence on the position of the chin was analyzed. Lateral head films in habitual occlusion from before and after 0.6 years of Herbst treatment as well as 0.6 years and 3.1 years posttreatment were evaluated. All patients were treated to Class I or overcorrected Class I dental arch relationships. During the treatment period, effective condylar growth was relatively more backward directed and about three times larger than that in untreated subjects with ideal occlusion (Bolton Standards). During the first posttreatment period of 0.6 years, effective condylar growth recovered with respect to both the direction and amount of changes. During the second posttreatment period of 2.5 years, effective condylar growth was "normal." The corresponding chin position changes during the different examination periods were a mirror image of effective condylar growth provided no mandibular autorotation occurred. In cases with anterior mandibular autorotation, relatively more forward and in cases with posterior mandibular autorotation relatively more backward directed chin position changes resulted.
对98例使用Herbst矫治器治疗的安氏II类1分类错牙合病例分析了“有效的髁突生长”（髁突改建、关节窝改建以及髁突在关节窝内位置变化的总和）及其对颏部位置的影响。评估了Herbst矫治0.6年前后以及矫治后0.6年和3.1年习惯性咬合时的头颅侧位片。所有患者均矫治至I类或过度矫正至I类牙弓关系。治疗期间，有效的髁突生长相对更向后，且比未治疗的理想咬合患者（Bolton标准）大3倍左右。在矫治后的第一个0.6年期间，有效的髁突生长在变化方向和量上均恢复。在矫治后的第二个2.5年期间，有效的髁突生长“正常”。在不同检查期间，相应的颏部位置变化是有效的髁突生长的镜像，前提是未发生下颌自动旋转。在下颌前向自动旋转的病例中，颏部位置变化相对更向前，而在下颌后向自动旋转的病例中，颏部位置变化相对更向后。
