What pH level is optimal to prevent the demineralisation of dental enamel?

The optimal pH level to prevent the demineralisation of dental enamel is around neutral, specifically at a pH of 7.0. At this neutral level, the environment is neither acidic nor basic, which helps to maintain the integrity of the enamel. Dental enamel begins to demineralise in more acidic conditions (generally when the pH drops below 5.5), making a neutral pH essential for protecting tooth structure and preventing cavities. By keeping the oral environment at or near this neutral pH, the natural remineralisation processes can occur effectively, thus enhancing the overall health of the teeth.