Atkins & Anderson DDS Blog


What’s the Difference Between Fillings and Sealants?

While dental fillings and dental sealants both coat and shield your teeth, they are quite different in three main areas: purpose, materials, and longevity. To clarify the differences between sealants and fillings, we’ll break everything down for you.

Difference #1: Purpose

Dental Fillings

The purpose of a filling is restorative. It repairs damage that has already been done to the teeth from decay. After a cavity develops, a filling is necessary to block the entry of bacteria that can lead to an infection or further damage. Tooth decay occurs when the enamel (the strong outer covering on your teeth) is weakened. Oral acids further break down the enamel until a hole or cavity forms. During a short procedure, your dentist will remove the decayed enamel, clean out the cavity, and fill in the hole.

Dental Sealants

The purpose of a sealant is preventative. A sealant covers a portion of your tooth to protect the enamel before it shows signs of decay. In most cases, sealants are applied to the back molars where there are deep grooves on the tooth’s surface. Sealants help to fill in the grooves, making it harder to trap debris from food. Bacteria love to feed on trapped carbohydrates, which leads to the formation of plaque and eventual decay.

Difference #2: Materials

Dental Fillings

There are several options for filling materials. You and your dentist can decide which material makes the most sense for you: silver amalgam, porcelain, composite resin, or gold. Many people prefer to use a tooth-colored material like porcelain or composite resin, especially if the location of the filling is highly visible. In this case, your dentist can match the filling material to your other teeth so that you maintain a seamless smile.

Dental Sealants

Sealants are made of plastic and provide a strong, clear barrier. During a quick procedure, the liquid sealant is applied to your tooth, then it hardens under a special UV light.

Difference #3: Longevity

Dental Fillings

Fillings are considered permanent applications. The materials used in a filling can withstand regular bite pressure and rarely need replacement.

Dental Sealants

While sealants are strong and long-lasting, they wear away more often than fillings. Over time, your sealant may need to be reapplied so that it can continue to protect your teeth effectively.

The good news is you don’t have to decide which treatment you need on your own. Our skilled dentists at Atkins and Anderson Dentistry can evaluate your teeth and confidently tell you if you need a filling or sealant. To schedule an appointment, contact us today.


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