While the effects of a lack of water may not be as traumatic to teeth and gums, they are nonetheless significant. Without regular infusions of water dental health would rapidly deteriorate because water:
One of the first oral problems caused by a lack of water is dry mouth. This condition makes it easier for acids and bacteria to harm the teeth - which can lead to other dental issues such as bad breath, cavities and gum disease.
Plain water is best as sparkling water is more acidic and flavoured water contains sugars. Fluoridated water offers the best protection for teeth. Any concerns about the amount of fluoride being consumed should be discussed in detail with your dentist who can reassure you of its safety.
Read more on this topic at https://yourdentalhealthresource.com/did-you-know-drinking-water-is-good-for-your-smile/