20 year old crowns in need of replacement. Many patients have old crowns that are not pretty. The need for replacement crowns is caused by several factors:Crowns were not well done, originally (poor color, shape, length, fit).Changes to nearby natural teeth caused mismatch of crowns and teeth.Gum recession exposes metal collar or yellow root.Cavities at the margin of the crown(s) called recurrent decay.Patient desires whiter teeth.
