I'll try to make this easy: I have had 4 front crowns 2 of these w/ rootcanals w/a verbal lifetime garauntee, the same night my porceliane crowns were finally set, i woke up around 4:am with my entire root canal tooth broken off at the gum line, so the foll: mon. It was posted back in, 3 months later, other RC tooth broke while eating , next day re-posts it 2yrs later went for a checkup and he "accidentley" breaks my prior reposted cap and is now chrgng me $2,000 more for a bridge after I already spent $3,000 on my 4 front teeth