Your first focus should be on the treatment of the cavities that have already occurred. This will include fillings of those teeth. Whether more cavities will occur in the future and whether more feelings will be required is not in the control of the dentist.... it is only your brushing technique and your dietary pattern that defines the formation of new cavities. You can ask your dentist to describe a proper brushing technique for a better oral hygiene maintenance and if you follow it meticulously you can increase the chances of avoiding new cavity formation. Regards.