van Lith L G
Ned Tijdschr Tandheelkd. 1991 Nov;98(11):434-6.
In 1969 we started an investigation of the dental abnormalities and treatment in a severely and profoundly mentally retarded population in The Netherlands. In this study the occurrence of bruxism, rumination and the combination of both is reported. Especially the combination is serious, since it inevitably and remedilessly ruins the dentition. The remains have to be removed already at an average age of 30 years. These patients, usually males, were not even cooperative during the daily brushing of their teeth.
1969年，我们开始对荷兰一群重度和极重度智障人群的牙齿异常及治疗情况进行调查。本研究报告了磨牙症、反刍现象以及两者并发的情况。尤其是两者并发的情况很严重，因为它会不可避免且无法补救地损害牙列。这些患者的牙齿平均在30岁时就不得不被拔除。这些患者通常为男性，甚至在日常刷牙时都不配合。
