4 Relationship between the market share of the fluoride toothpaste and dental caries experience by birth year cohort according to the Japanese national survey of oral health

Abstract

The purpose of this study was to analyze the relationship between dental caries prevalence and the market share of fluoride toothpaste by birth year cohort. The dental caries experience was obtained from 10 Japanese national surveys of oral health over about 60 years. The market share of the fluoride toothpaste was researched by the Lion Co., Ltd. It was analyzed by birth year cohort for 11 groups evaluated every five years. DFT and DMFT indices tended to peak for the generations born after World War II, while the market share of fluoride toothpaste also increased rapidly at the same time. The decrease in caries experience was likely affected by the market share of the fluoride toothpaste.