Sir, there is a lack of sufficient resources for evidence-informed dental recommendations in Iran. There are a few books about dental health and hygiene available here, but they offer different and, in some cases, contradictory recommendations. Three years ago, I became aware of this problem and tried to solve it.

I aimed to translate the Delivering better oral health toolkit by Public Health England, being the latest and the most reliable dental health recommendations.1 My dental school classmate (Hossein Mohammad-Rahimi) and I translated the 2017 version and decided to start a project to put the translation on a website as plain texts and PDF files. We chose 'Dahaan' (meaning 'mouth' in Persian) as the name of our project (www.dahaan.ir).

This toolkit helped us spread recommendations such as 'spit, don't rinse' and 'using toothpastes containing at least 1350 ppm fluoride' in the Iranian community via our social media. These recommendations and many others are not taught in the dentistry curriculum of Iran and this was a challenge for us as many dentists are not aware of this. Because of this, at first, many people did not fully trust us enough to implement these recommendations in their daily lives. I suggest that other countries translate and use this toolkit which, to my knowledge, is the only comprehensive evidence-informed dental health toolkit freely available on the web.

We have tried to inform the Iranian Dental Association about our translation to increase the usage of this book by Iranian dentists. Some negotiations have taken place and we hope to attract their support.