A Study of the cost-benefit analysis of caries prevention at the dental clinc for children

本研究旨在比较两组乳牙和恒牙的防龋效果，回顾组为88名学龄前儿童，均接受过龋病治疗，并定期进行口腔健康检查。对照组为151名学龄前儿童，他们接受过龋齿治疗，但直到12岁才定期进行口腔健康检查。回忆组乳牙第一次拔除的平均时间为3.30年，对照组为3.30年，2.48岁回忆组的持续时间比对照组长0.8年。（ANOVA p<0.001）回忆组在12岁时的平均DF牙齿为2.39颗，对照组为4.52颗。回忆组的龋齿数量与对照组相比有2.1的差异。（方差分析p<0.001）在回忆组中，治疗乳牙的牙科费用比对照组便宜约39，456日元。在回忆组中，治疗恒牙的牙科费用比对照组便宜约13，802日元。根据回忆系统，到75岁为止，牙科费用的估计减少约为522，526 - 572，734日元。成本效益比约为19，000 - 21，000日元。成本效益比，这意味着减少每次就诊可能的牙科费用为5.5 ± 6.0。这些结果表明，儿童时期的回忆系统是有效的，在他们的一生中，减少牙科费用。

This study was conducted to compare the effectiveness of the caries prevention on primary and permanent teeth of two groups, the recallant the control group, and to estimate the economical benefits of the caries prevention by the recall system of their life time.The recall group was composed of 88 preschool children who had undergone dental caries treatment and had regular oral health check-ups until the age of 12.The control group was composed of 151 preschool children who had undergone dental caries treatment, but never had regular oral health cheek-ups until at the age of 12.With the recall group, the average duration of the first restorations in the primary molars was 3.30, years and with the control group, 2.48 years. The duration for the restorations for the recall group was 0.8 years longer than the control group.(ANOVA p<0.001)With the recall group, the mean DF-teeth was 2.39 at 12 years of age, and with the control group was 4.52. The recall group showed 2.1 difference in the number of caries teeth than the control group.(ANOVA p<0.001)Of the recall group the dental expensess for tretment of the primary molar theeth was about 39,456〜89,664 yen cheaper than the control group.Of the recall group the dental expensess for tretment of the permanent teeth was about 13,802 yen cheaper than the control group at the age of 12years.Basing on the recall system, the estimated decrease of dental expenses was about 522,526〜572,734 yen till age of 75.The cost-effectiveness ratio, which means to decrease the possible dental expenses per one vist, is about 19,000〜21,000 yen.The cost-benefit ratio, which means to decrease the possible dental expenses per one vist expense, is 5.5〜6.0These results suggests that the recall system during childhood is effective in decreasing of the dental expenses, in their life time.