Metal veneer crowns are best penetrated with new, sharp
carbide burs. Round burs work well, but tungsten carbide
transmetal burs are more efficient. These crosscut fissure burs
are specifically designed to cut through metal restorative materials.
Porcelain or ceramometal restorations must be handled
delicately to minimize the potential for fracture. The clinician
should use a round diamond bur and copious water spray
to penetrate the porcelain. After porcelain penetration, a