Virtanen J I, Bloigu R S, Larmas M A
Department of Preventive Dentistry and Cariology, University of Oulu, Finland.
J Dent. 1996 Jul;24(4):245-50. doi: 10.1016/0300-5712(95)00078-x.
The aim of this study was to analyse the possible effect of early or late eruption of permanent teeth on the placement of first restorations on the different surfaces. The oral health records, of a total of 486 children born in 1970 and 1971 living in three rural communities in Finland, were analysed.
Caries susceptibility was determined indirectly by a new method. The study groups were defined as falling outside one standard deviation either side of the mean value for the timing of the eruption of first permanent molar teeth.
No statistically significant differences in restoration increments between the early and late eruption cohorts were found at the end of the study period. For the occlusal surfaces of the first molar teeth, the restoration placement curves plateaued at about 60-70%, while for the second molar teeth, the plateaus occurred at 50-60% for both study cohorts. In girls with 'late eruption', the height of the post-eruptive step (i.e. the number of teeth filled on the year of their eruption) was higher (50-100%) compared to boys and girls with 'early eruption'. The difference was statistically significant. For example, for the occlusal surface of D. 36, the 95% confidence interval for the difference between proportions was 12-53%.
No consistent effect of early or late eruption of permanent teeth was found on caries susceptibility measured post-eruptively by the placement rate of first restorations in a follow-up study of more than 10 years among Finnish children born in 1970-1971.
本研究旨在分析恒牙早萌或晚萌对不同牙面首次修复体放置的可能影响。对芬兰三个农村社区中1970年和1971年出生的486名儿童的口腔健康记录进行了分析。
采用一种新方法间接确定龋齿易感性。研究组被定义为第一恒磨牙萌出时间的平均值两侧超出一个标准差的情况。
在研究期末，早萌组和晚萌组之间的修复体增量没有统计学上的显著差异。对于第一磨牙的咬合面，修复体放置曲线在约60 - 70%处趋于平稳，而对于第二磨牙，两个研究组的平稳期均出现在50 - 60%。在“晚萌出”的女孩中，萌出后阶段（即萌出当年补牙的牙齿数量）的高度高于“早萌出”的男孩和女孩（50 - 100%）。差异具有统计学意义。例如，对于D. 36的咬合面，比例差异的95%置信区间为12 - 53%。
在对1970 - 1971年出生的芬兰儿童进行的一项超过10年的随访研究中，未发现恒牙早萌或晚萌对通过首次修复体放置率在萌出后测量的龋齿易感性有一致影响。
