Dental Crowns

A crown is a full-coverage cap that replaces the outer structure of a tooth that’s too damaged for a filling to fix, restoring its shape, strength, and function.

When a crown is the right call, versus a filling

A filling works when enough healthy tooth structure remains after decay or damage is removed to support it. Once too much of the tooth is gone — from extensive decay, a large old filling that’s failed, a fracture, or a root canal, which hollows out the tooth from the inside — there often isn’t enough left for a filling to hold up under normal biting forces. A crown solves this by covering the entire visible tooth above the gumline, distributing bite force across the whole structure rather than concentrating it on a smaller repair.

The traditional process

The dentist first removes any decay or damaged structure, then reshapes (preps) the remaining tooth so the crown has a stable, evenly reduced surface to fit over. An impression or digital scan captures the prepared tooth and the surrounding bite, which is sent to a dental lab to fabricate the crown — this typically takes one to two weeks. In the meantime, a temporary crown, usually made from a less durable acrylic or composite material, protects the prepared tooth and holds the space. At the second visit, the temporary is removed, the permanent crown is checked for fit and bite, and it’s cemented into place.

This is different from a same-day crown, where the dentist scans, designs, and mills the crown in-office in one visit, skipping the temporary and the wait for a lab. Not every practice offers same-day crowns, and not every case is suited to them — more complex bite adjustments or certain materials may still favor the traditional lab-made route.

How the margin — where crown meets tooth — matters

The seam where the crown’s edge meets the natural tooth (the margin) is the crown’s most vulnerable point. A well-fitted margin leaves no gap for bacteria to collect; a poor fit, or one that degrades over years of normal wear and cement breakdown, can let decay start underneath the crown, invisible until it’s advanced enough to cause pain or looseness. This is part of why crowned teeth still need routine checkups — the crown itself doesn’t decay, but the tooth underneath and the margin around it still can.

Living with a crown

A crown restores normal chewing function once it’s fully seated, and most patients adjust to the slightly different feel within a short period. Some brief sensitivity to temperature is common in the days after cementation, particularly if the tooth didn’t have a root canal, since the nerve is still present under the crown. Grinding or clenching puts the same stress on a crown that it does on natural teeth, so a night guard may be recommended if that’s a factor, and avoiding using the crowned tooth to bite very hard objects protects it the same way it would protect a natural tooth.