Name your Palette: Description: http://bronxdds.com/CROWNS.html Dental crowns may help if you have a wrecked or fractured tooth, have a cavity that is just too large for a filling, or if you had a root canal. Often, porcelain dental crowns may also be used as part of a smile make-over to give teeth a more stunning identical appearance or to replace an old worn-out or low quality crown.