Types of Dental Crowns, Compared

A solid cast alloy crown, historically gold and now usually a base-metal alloy. It is the strongest option, needs the least tooth removed because metal can be made thin, and wears at a rate similar to natural enamel so it is kind to the tooth biting against it.

It looks like metal, which rules it out anywhere visible. On a second molar in someone who grinds heavily, it is still arguably the best crown in dentistry, and it is the cheapest at ₹3,000 to ₹6,000.

A metal shell with porcelain fused to its outer surface: strength from the metal, appearance from the porcelain. It was the default for decades and it still works.

It has two known failure modes. The porcelain can chip off the metal, which cannot be properly repaired and means remaking the crown. And because the metal shell extends to the crown margin, a thin grey line appears at the gum as gums recede over the years. On a molar nobody sees it; on an upper front tooth it is the usual reason a clinically sound crown gets replaced. ₹4,000 to ₹9,000.

Solid zirconium dioxide, milled from a block by computer-controlled machining. Strong enough to need no metal substructure, so it is white throughout and can never develop the dark gum line.

Monolithic zirconia, milled as one piece, is exceptionally fracture-resistant and is the material of choice for patients who grind. Layered zirconia adds porcelain to the visible surface for better appearance, at a small cost in strength.

One caveat: zirconia is hard, and an unpolished or roughened surface can wear the opposing natural tooth. Properly glazed and polished it is not a practical problem, which is a reason to care which laboratory made it. ₹8,000 to ₹18,000.

A glass-ceramic pressed or milled as a single piece. It transmits and scatters light closest to natural enamel, which is what makes a crown read as a tooth rather than as a crown.

Strong enough for front teeth and premolars, and used on molars in some cases, though zirconia is the safer choice under heavy load. It is the best-looking crown available and the right answer for a visible front tooth. ₹10,000 to ₹20,000.

One limitation: it is somewhat translucent, so a badly discoloured or metal-post-restored tooth underneath can show through. In that situation layered zirconia masks better.

Acrylic or composite, made chairside or in the lab, worn for the week or two while the definitive crown is made. ₹500 to ₹2,000.

Not a lesser version of a crown, a different thing entirely. They are designed to come off, they leak over time, and they are not built for months of use. A temporary crown left in place for a year is a route to decay under it and to the tooth shifting so the permanent crown no longer fits.

Back teeth: monolithic zirconia. Strength where it is needed, no metal line, appearance barely relevant.

Front teeth: lithium disilicate, or layered zirconia where the underlying tooth is dark and needs masking.

Tight budget, or a molar nobody will ever see: metal-ceramic or full metal remain perfectly serviceable, and there is no reason to feel short-changed by either.

Heavy grinder: monolithic zirconia or full metal, plus a night guard. The guard matters more than the crown material.

Not the material, in most cases. A crown usually fails because decay develops at the margin where it meets the tooth, or because the tooth underneath fractures. Both are about the accuracy of the fit and how well you clean that margin, not about which ceramic was chosen.

That is why the laboratory and the impression or scan quality matter more than the brand name of the material, and why the crown margin is the thing to ask about.