Virtanen J I, Bloigu R S, Larmas M A
Department of Preventive Dentistry and Cariology, University of Oulu, Finland.
J Dent. 1997 Jan;25(1):17-24. doi: 10.1016/s0300-5712(95)00117-4.
The purpose of this work was to analyse longitudinally whether the placement of restorations on permanent molar teeth immediately after their eruption results in (a cohort with) higher filling increments in all individual teeth thereafter. The patient documents of 937 subjects born either in 1970-1971 or in 1980-1981 were analysed.
The methods of survival analysis were employed. If any of the first permanent molar teeth had been restored in the course of tooth emergence, the person was assigned to the experimental group, and all the others were placed in the control group. Those in whom all the first permanent molar teeth had been restored at the time of emergence were compared with all the others.
Early restoration of any permanent molar indicated higher filling increments in all the other molar teeth. The differences between the groups with regard to the first and second molar teeth were statistically highly significant (e.g. D.17 for the girls: log-rank chi 2 = 32.8, p = 0.0001 and Wilcoxon chi 2 = 28.7, p = 0.0001). The differences were greater among the girls than among the boys. Early restoration of the first permanent molar teeth did not indicate high filling increments in the incisors, canines or the smooth surfaces of any tooth.
Fissure caries and smooth surface caries are different entities. The present method can be of help as an additional tool to help the clinician identify "risk" patients, in that an early restoration in any first molar is a powerful indicator of a risk of restorations in the other first molar teeth and also the second molar teeth.
本研究旨在纵向分析恒牙萌出后立即对恒磨牙进行修复是否会导致此后所有个体牙齿的补牙增量更高（形成一个队列）。分析了937名出生于1970 - 1971年或1980 - 1981年的受试者的病历。
采用生存分析方法。如果任何第一恒磨牙在萌出过程中进行了修复，则将该人分配到实验组，其他所有人则归入对照组。将所有第一恒磨牙在萌出时都进行了修复的人与其他所有人进行比较。
任何恒磨牙的早期修复表明其他所有磨牙的补牙增量更高。第一和第二磨牙组之间的差异在统计学上具有高度显著性（例如女孩的D.17：对数秩卡方 = 32.8，p = 0.0001；威尔科克森卡方 = 28.7，p = 0.0001）。女孩之间的差异比男孩之间的差异更大。第一恒磨牙的早期修复并未表明切牙、尖牙或任何牙齿的光滑面有高补牙增量。
窝沟龋和平滑面龋是不同的情况。本方法可作为一种辅助工具帮助临床医生识别“风险”患者，因为任何第一磨牙的早期修复是其他第一磨牙和第二磨牙修复风险的有力指标。
