I don't think anyone said their fillings crumbled from Hesham, they seem to be extremely tough in my experience, they are somewhat joined to the next teeth in places, not sure why but I have had mine in for over 9 mos. with no problems, I haven't done the final replacement due to financal pressure and also that I have been having to pay for zirc oxide implants with another dentist, I am pretty sure I could leave these temporaries in for a good long while yet, they actually seem better than a lot of permanent fillings I've had in the past, just not quite as refined, from the sound of it I think Tracy was confused about the procedure and didn't seem to understand what the process was, and who isn't confused with a mercurial mind?