We crown a tooth only when a filling won’t hold
A tooth needs a crown when it has lost too much of itself for a filling to hold. A filling sits inside the tooth and relies on the walls around it; once those walls are thin or cracked, biting can split them. A crown covers the tooth from the gumline up, so the force is spread over the whole tooth and you can chew on that side again.
The usual reasons are a large filling or a cavity that has undermined the tooth, a cracked tooth, a back tooth after a root canal, a tooth worn down by grinding, and an implant, which needs a crown on top. A crown can also reshape a tooth that’s badly discolored or misshapen when a veneer can’t.
If a filling will do, we’ll tell you. A crown takes off more of the tooth, and that’s tooth you don’t get back, so we keep crowns for the teeth that need them.