1. Fizzy drinks are top of the list. Whilst regular fizzy drinks will cause both tooth decay and dental erosion, diet drinks fortunately don't cause dental decay but do cause dental erosion if drunk to excess. Drinking 2-3 fizzy or other acidic drinks a day is enough for your teeth to show signs of dental erosion.
2. Fruit juice and fresh fruits. All fruits are acidic and some are worse than others. Citrus fruits are especially acidic. We are encouraged to eat more fruit and vegetables. However, everything in moderation,....I have had patients who eat 5 or more citrus fruits a day. This is definitely enough to damage your teeth. I say to these patients, "if you want to be healthy, a little less fruit, a little more veg!".
3. Alcoholic drinks especially dry white wine and mixers.
4. Pickles and vinegar - I have come across people eating pickled lemons - a definite no-no if you don't want your teeth to dissolve.
5. Yoghourt is acidic, so be aware of this if you have a lot of yoghourt in your diet.
6. Swimming - not an issue for many, but competitive swimmers can suffer from acid erosion due to the chlorinated swimming pool water. If you swim a lot you might want to take that into account and be especially careful not to have too much acidic food or drink in your diet.
You need to look at your intake of food and drinks over the day and try to limit it to two acid hits per day.
Some other top tips:
1. You also need to be careful not to brush immediately after eating or drinking something acidic. Soaking something in acid then scrubbing it is a sure way to wear it down fast. So wait around 30 minutes after eating or drinking something acidic to brush your teeth. If your breakfast is acidic, brush before breakfast and use a fluoride mouthwash after breakfast.
2. Keep well hydrated. Saliva is essential to dilute and neutralise the acid and you need to be well hydrated to make plenty of saliva!
3. Have acidic drinks in one go. If you sip over a long period of time your saliva will have just about neutralised the acid, when you top up your mouth with acid again.