I need 8 crowns total- 4 upper front and 4 lower front. Insurance willl not help because there is no decay or breakage. The teeth are worn from chewing. I should have had braces early in life, now I am 52 and do not want to go thru that. I was told conflicting stories. One dentist said that if we do crowns without correcting the bite first, the crowns will chip and break. Another says that crowns are so strong now and if it took 50 years to wear them this much, surely crowns would last 15-20 yrs. Do you agree? Will crowns change the size of everyting and thus change the bite slighltly? Could we wear a mouthguard parttime after crown work to protect from wear? Thank you for a prompt reply.