Jensen B L, Kreiborg S
Institute of Paediatric Dentistry, Royal Dental College, Copenhagen.
Br Dent J. 1992 Mar 21;172(6):243-7. doi: 10.1038/sj.bdj.4807836.
Based on the findings of our recent longitudinal study on the abnormalities of the dentition in cleidocranial dysplasia (CCD), a hypothesis has been proposed, which makes it possible to predict time of onset of formation of supernumerary teeth and their location in the jaws. It was found that a diagnosis should be made early so that formation of supernumerary teeth can be diagnosed and early intervention undertaken. It should be possible to diagnose supernumerary incisors at about 5-7 years of age and supernumerary canines and premolars a few years later. When root length of the normal permanent teeth has reached about one third of its final length, the overlying supernumerary teeth should be removed, together with overlying bone and primary teeth. In regions where no supernumerary teeth are formed, eruption may also be improved by removal of the primary teeth and surgical exposure of the underlying permanent teeth. Conventional orthodontic treatment and eventually autotransplantation of teeth may still be necessary in the future, but it can be anticipated that the new strategy, with much earlier intervention, will materially reduce the extent of surgical and orthodontic interventions, which have previously been of extremely long duration, tedious to the patients and often of limited success.
基于我们最近关于锁骨颅骨发育不全（CCD）牙列异常的纵向研究结果，提出了一种假说，该假说能够预测多生牙的萌出时间及其在颌骨中的位置。研究发现应尽早做出诊断，以便能够诊断多生牙的形成并进行早期干预。大约在5至7岁时应能够诊断出多生切牙，几年后可诊断出多生尖牙和前磨牙。当正常恒牙的牙根长度达到其最终长度的约三分之一时，应将覆盖其上的多生牙连同覆盖的骨组织和乳牙一并拔除。在未形成多生牙的区域，拔除乳牙并手术暴露其下方的恒牙也可能改善萌出情况。未来可能仍需要常规正畸治疗以及最终的牙齿自体移植，但可以预期，这种早期干预的新策略将大大减少手术和正畸干预的程度，而此前这些干预持续时间极长，令患者厌烦且往往效果有限。
