Baumrind S, Molthen R, West E E, Miller D M
Am J Orthod. 1979 Jun;75(6):630-40. doi: 10.1016/0002-9416(79)90095-2.
Data from a sample of 198 Class II cases treated with various appliances which deliver distally directed forces to the maxilla were examined to determine the frequency of absolute distal displacement of the upper first molar and of the maxilla. Analysis revealed that such distal displacement is possible and that it is, in fact, a frequent finding following treatment. Long-range stability of distal displacement was not assessed.
对198例使用各种可对上颌施加远中向力的矫治器治疗的II类错颌病例样本数据进行了检查，以确定上颌第一磨牙和上颌绝对远中移位的频率。分析显示这种远中移位是可能的，事实上，在治疗后这是一个常见的发现。未评估远中移位的长期稳定性。
