Harmful Impact of the Caffeine in the Oral cavity

What is caffeine?This is a basic question which most probably everyone knows upto a certain extent.Caffeine is a CNS stimulant.It is also known as a "double edged sword".We all consume coffee, soda, energy drinks like redbull which contains caffeine in considerable quantities.Caffeine is highly useful in small amounts, they are also used in the medicines too.Moderate amount is considered as safe.Now being a dentist I want to focus particularly in the impact of the caffeine to the oral cavity.Knowing this it will help the readers to restrict how much caffeine we can consume each day.