Kuijpers-Jagtman A M
Afdeling Orthodontie en Orale Biologie, Universitair Medisch Centrum St. Radbound, Nijmegen, Huispost 117, Postbus 9101, 6500 HB Nijmegen.
Ned Tijdschr Tandheelkd. 2002 Feb;109(2):42-6.
Research into the long-term stability of orthodontic treatment at the University of Nijmegen (the Netherlands) until 10 years after retention has shown that nearly 50% of the total relapse takes place the first two years after retention. After that period certain stability is reached except for the lower front teeth. Ten years after the retention phase their position is even worse than at the start of treatment. The changes in lower front teeth alignment are the result of relapse, but also of normal physiological changes during ageing of the dentition. Therefore it is questionable whether late mandibular incisor irregularity should be (re)treated. Relapse of mandibular incisor alignment shortly after debonding can be restored by tightly tying the rotated incisor(s) to the C-C bar with a steel ligature, by using a spring-retainer or by rebonding of brackets to the lower front teeth. After correction of the incisor position the C-C bar should be bonded to all lower front teeth. (Re)treatment of mandibular incisor irregularity at an older age asks for more complicated treatment mechanics.
荷兰奈梅亨大学对正畸治疗的长期稳定性进行了研究，随访至保持期结束后10年，结果显示近50%的复发发生在保持期的头两年。在这之后，除了下前牙外，牙齿达到了一定的稳定性。保持期结束10年后，下前牙的位置甚至比治疗开始时更差。下前牙排列的变化是复发的结果，也是牙列老化过程中正常生理变化的结果。因此，晚期下颌切牙不齐是否应（再）治疗值得怀疑。脱粘结后不久下颌切牙排列的复发，可以通过用钢丝结扎将旋转的切牙紧密结扎到C-C杆上、使用弹簧保持器或通过将托槽重新粘结到下前牙上来恢复。在矫正切牙位置后，C-C杆应粘结到所有下前牙上。在年龄较大时（再）治疗下颌切牙不齐需要更复杂的治疗力学。
