Hi Mark. I need 6 front upper crowns (that are 25 years old and metal backed) replaced as one has chipped. Is it true that metal backed crowns cause less wear on opposing bottom teeth (which are quite worn) than fully porcelain ones? I thought having metal backed crowns was now dated? I also apparently grind/clench my teeth at night.

Also is a home whitening system over 2-3 weeks more effective than in surgery zoom as my dentist doesn’t offer zoom due to some EU regulations and says home kit is better?