the biggest cause of dental problems is poor hygiene. brushing twice a day for at least two minutes and flossing daily are very important. also a professional cleaning every 6 months helps clean up the areas your brush and floss cant reach. even if you practice perfect at home care genetics can also play a part in why some people have more problems than others. then there are the bad habits like chewing ice or your nails that can cause teeth to chip or crack. grinding at night can cause excessive where and tooth fractures also. there are many causes of bad teeth and some are preventable and others not.
Seeing a patient dentist whom you can trust is advised.