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by yogipatel 3880 days ago
I wouldn't call it typical, but I didn't have any fillings until I was 33. Everyone's biology is a bit different — salivary flow, composition, etc. Probably the most important thing that you mentioned is the limited sugar intake. Carbs => acid => cavities.

Keep in mind that these things tend to deteriorate as we age, so you might not be able to get away with rarely brushing forever.