Metal crowns are made from base metal alloys. Most commonly these are prepared using cobalt chromium. For these crowns teeth require less trimming and tooth wear to opposite tooth is minimum. Color of these crowns limits their usefulness to back teeth only. They are the strongest dental crowns.
PFM or Porcelain fused to metal crowns these crowns closely resemble natural tooth and are a good choice for front or back teeth. They are next best than all ceramic crowns as far as looks are concerned. Disadvantage of these crowns is that underlying metal of the crown can become visible as a black line or porcelain can chip or break some time in future.
All ceramic or metal free or Zirconia crowns these crowns are made only from ceramic. These days high quality, zirconia- based ceramic is available, that can match metal crown in strength. These crowns have the exceptional quality of resembling natural tooth; reason being ceramic is translucent and light can pass through it making it appear life- like. These crowns are highly recommended when esthetics is the prime concern as in case of front teeth.
Goel Dental offers ceramic crowns from 3M LAVA which comes with company warranty of 5-15 years and E Max crowns which are high quality crowns and fulfills cosmetic dental needs.