In the mouth, there is a constant battle between demineralisation (tooth being dissolved by acids) and remineralisation (tooth being re-deposited on the teeth from saliva). If your demineralisation is happening at a greater rate than remineralisation, you get loss of tooth substance.

If your mouth is acidic a good deal of the day from, say, excessive and constant intake of acidic soft drinks or constant sugar intake, then the demineralisation wins and you have problems.

If you are careful with the diet, then your saliva is more neutral and you will get good

remineralisation to constantly repair the teeth.