Not every damaged tooth needs the same fix. Fillings work well for small to moderate cavities, but once a tooth has lost significant structure — from a large cavity, a crack, or after a root canal — a filling simply doesn't have enough healthy tooth left to bond to securely.
That's where a crown comes in. Think of it as a custom-fitted cap that covers the entire visible portion of the tooth, restoring its shape, strength, and function. It's the difference between patching a small hole versus capping a tooth that needs structural reinforcement to survive normal chewing forces.
Bridges solve a related but different problem — a missing tooth, rather than a damaged one. Instead of leaving a gap (which causes neighboring teeth to shift over time and can affect your bite), a bridge anchors a replacement tooth to the healthy teeth on either side.
Both crowns and bridges are typically made from porcelain or zirconia these days, materials chosen specifically because they can be shade-matched to blend with your natural teeth while withstanding years of daily biting and chewing pressure.