Crown vs. Filling: How They Differ

What a filling generally is

A dental filling replaces a small to moderate amount of missing tooth structure — often after decay is removed or after a small chip. The material is placed directly into the tooth in one visit.

What a crown generally is

A crown is a custom covering that fits over a tooth to restore its shape and strength. It's typically considered when a tooth has lost significant structure or has been weakened by decay, a fracture or a large existing restoration.

Key differences

• Amount of tooth structure replaced (filling: small to moderate; crown: full coverage)
• Number of visits typically involved
• Materials available
• Long-term protection provided to the remaining tooth
• General cost range

When each may be considered

• Small cavity with intact surrounding tooth: a filling is often discussed
• Larger cavity, cracked tooth or previously treated tooth needing coverage: a crown may be considered
• Fractured cusp or heavily restored tooth: a crown is sometimes recommended for strength

How the dentist decides

The dentist examines the tooth, may take images and evaluates how much healthy structure remains, the location of the tooth, bite forces and the condition of the surrounding gum tissue.

Factors that can affect cost

• Material used
• Number of tooth surfaces involved
• Whether additional treatment (like a build-up or root canal) is needed first
• Complexity of the tooth