What to do if you have bad teeth at the age of 30?

Update: I have weak teeth. Cavities form easily. My teeth are not aligned well and then in the overlap there is room for food and other stuff to get stuck. I go twice a year to have my cavities fixed and to remove calculus ("stone"). I am 30 now,if it continues will have all teeth with cavities, sealed. What is... show more I have weak teeth. Cavities form easily. My teeth are not aligned well and then in the overlap there is room for food and other stuff to get stuck. I go twice a year to have my cavities fixed and to remove calculus ("stone"). I am 30 now,if it continues will have all teeth with cavities, sealed. What is the general practice in these ways? Are there alternatives? Artificial teeth - solution 'for good'? Other approaches?
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