Do All Porcelain Crowns Stain?

While the surface has been altered, it is still porcelain.  If the porcelain was gone, you would see a metal core or the tooth structure itself.  The dentist would have had to remove a LOT of porcelain to do this (about a full mm on the sides, up to 2 mm on the back).

After contouring, most dentists will polish the surface, and staining will be minimal, if at all.  I have not witnessed staining as you fear, but "never say never."

Before cementation of the crown, adjustments are made by the dentist to achieve the right bite and contact areas.  These areas are then polished back to a smooth and shiny surface.  This will not make the porcelain more likely to stain.  In fact, porcelain crowns and veneers do not stain.   Simply maintain good oral hygiene and get your regular cleanings.   Best, Dr. Elizabeth Jahanian.

In general, procelain does not stain.  Just like grandma's fine china, clean it well and surface discoloration disappears.  Using a toothbrush daily and a periodic polishing by the dental office will maintain the beauty of your porcelain crown.

Porcelain crowns are made with a glazed, smooth surface.  So long as any areas adjusted during placement have been polished smooth,  there should be not scratches for stain to build up on.  If you still find that staining builds up on these adjusted areas, your dentist can repolish them intraorally at your next visit.