The Situations That Usually Call for a Crown
After a root canal. Root canal treatment removes infected tissue from inside the tooth, but it also leaves the tooth more brittle. A crown placed over a root-canaled tooth protects it from cracking under the pressure of chewing – which is how most untreated post-root canal teeth eventually fail.
A large cavity or broken filling. When decay has destroyed too much of a tooth’s structure, or an old filling has cracked and the tooth underneath is compromised, there may not be enough healthy tooth left to hold a new filling reliably. A crown covers and stabilizes what remains.
A cracked tooth. Cracks that extend toward the root are serious. Left unprotected, chewing pressure can split the crack further – sometimes deep enough that the tooth can’t be saved at all. A crown holds the tooth together and prevents the crack from spreading.
Severe wear from grinding. Chronic grinding wears teeth down significantly over years. When a tooth has lost enough structure that its function or bite is affected, a crown can restore it to its original height and protect the surface going forward.
Cosmetic reasons in certain cases. Severely discolored, misshapen, or damaged front teeth that can’t be addressed with veneers or bonding may be candidates for a crown – though this is less common and worth discussing carefully, since crowns require more tooth preparation than veneers.