Is Khat chewing habit a risk factor for occlusal caries progression?

Backgrounds: People in Yemen and in East African countries chew khat more than five hours daily.

Objectives: The aim of this study was to assess the relationship between khat and occlusal caries progression.

Methods: A cohort study was carried out among 98 Yemeni khat chewers and 101 non-chewers aged 18-35 years old with early occlusal caries lesions.