Best crown type for incisors, canines

[PrinceCharles]

As a possible solution to correct failed multiple facial fillings, my dentist has recommended crowns for my top teeth. Which type is preferred for the front of the mouth? I have heard some PFM crowns have problems with metal showing at the gum margins.

 

[movemen]

Nowadays the restoration of choice for front teeth are emax or zirconia crowns with porcelain layering. If the situation is favorable then pfm might work but the esthetic will be inferior to emax and zirconia crowns