Ryan=
Mix and matching Tribos with another posterior brand is exceptable and easy to do if you think strength is an issue, but want an estheticly natural anterior. Personally, I have not had an issue with the teeth holding up, but they havent been out there long enough to track. As a side note I have replaced other brands of nano-mumbo-jumbo-composite-hybrid-crosslinked teeth on implant cases because they didnt hold up, so I dont feel there is a disadvantage in using Tribos.
cheers