If you have to get a filling, you and your dentist have lots of materials to choose from. Before your appointment, get up to speed on your options.
Fillings That Look Like Your Teeth
Composite fillings are the most widely-used dental filling material. They're made of glass or quartz in resin.
Advantages: Your dentist can closely match the color of a composite filling to the color of your surrounding natural teeth.
Disadvantages: Just like your own teeth, composite fillings can stain or discolor over time.
Your dentist may consider a composite filling if the cavity is small to medium-sized, or if the affected tooth gets a lot of chewing action. These may also be a good choice for people who are afraid of dental work, since a composite can be bonded in place, which means less drilling.
Fillings That Release Fluoride
The newer options for dental fillings include glass ionomers, made of acrylic acids and fine-glass powders.
Advantages: Glass ionomer fillings can be colored to blend in with surrounding natural teeth. Plus, they can be designed to release small amounts of fluoride, which helps prevent decay.
Disadvantages: These fillings can fracture, so they aren't appropriate for chewing surfaces.
Because of their fragile nature, dentists may suggest this type of filling for cavities near the gum line or to fill between teeth.
Crowns That Look Like Your Teeth
When you need a crown, inlay, or veneer, the go-to is typically porcelain, ceramic, or another glass-like material.
Advantages: The color closely matches natural teeth. The components are durable and very hard.
Disadvantages: Porcelain restorations require several dentist visits and can cost more than some other filling options.
Dentists choose porcelain for veneers because it can be formed into thin shells that fit over enamel, the outer surface of your teeth.
Affordable, Long-lasting Fillings
Dentists have used amalgam to fill cavities for more than a century. These fillings are alloys that combine silver, tin, copper, and mercury.
Advantages: They're are durable and long-lasting. Plus, amalgam is one of the least expensive materials.
Disadvantages: Amalgam is silver-colored, so fillings will show. Cavities filled with amalgam are often temporarily sensitive to hot or cold.
Your dentist may opt for amalgam if your cavity is in a back molar, because it stands up well to chewing. Some people may have concerns about the safety of mercury in amalgam, but the American Dental Association considers this material safe.