Qualitative research to investigate what is the people's risk perception about water fluoridation.

在日本，没有水氟化处理。我们调查了母亲对水氟化的风险认知。此外，我们还调查了牙科人员的意见，为什么没有实施，以及如何实施。我们在两项调查中找到了一致的意见。为了降低风险认知，使用调至最佳氟浓度的水，牙科人员提出在牙科诊所候诊室建议患者饮用调至最佳氟浓度的水。

In Japan, there is no water fluoridation. We investigated what was the mother’s risk perception about water fluoridation. In addition, we investigated the opinions of dental personnel why it was not carried out, and how could it be implemented. We found a consensus opinion in the two investigations. It was to use water adjusted to the optimal fluoride concentration decreased the risk perception, and dental personnel proposed that we recommended the patients to drink water adjusted to the optimal fluoride concentration in the waiting room of dental clinic.