What is a Cavity Filled With? Learn About Dental Fillings from our Apex General Dentist

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When a tooth is damaged by decay and acid, your dentist will use a filling to restore it to its normal shape and function. If you are going to get a filling in an upcoming dental appointment, or have already had one and are just curious about the procedure, here is everything you need to know about dental fillings from our Apex dentist office.

Popular Dental Filling Materials 

Fillings help close off spaces where bacteria can enter, and prevent further decay. Materials used for fillings include:

  • Gold
  • Porcelain
  • Composite resin (for tooth-colored fillings)
  • Amalgam fillings (an alloy of mercury, silver, copper, tin and sometimes zinc).

No one type of filling is “best” for everyone. What’s best for you will depend on the extent of the decay; whether or not you are allergic to certain materials; where the cavity is located; and cost. Below is more information about each cavity filling material.

Gold Fillings

Historically the only filling material that was used, gold fillings are now made to order in dental labs. Gold inlays are well-tolerated by gum tissue, and may last for more than 20 years. For these reasons, many dentists consider gold to be the best filling material. However, it is often the most expensive choice, and is not the most resilient.

Porcelain Fillings

Porcelain fillings usually have a similar cost to gold. If you have ever heard the dental term “inlay” or “onlay”, it was referring to a porcelain filling. Porcelain restorations are a popular choice because they can be matched to the color of the tooth, resist staining, and are very durable. A porcelain restoration generally covers most of the tooth.

Composite Resin Fillings

Composite fillings are essentially a type of plastic. These can also be matched to the same color of your teeth, and are therefore another popular choice when the cavity is in a visible area. The ingredients are mixed and placed directly into the cavity, where they harden. Composites may not be the ideal material for large fillings, as they may chip or wear over time. They can also become stained from coffee, tea, or tobacco, and do not last as long as other types of fillings (generally from three to 10 years).

Amalgam Fillings

Amalgam fillings are often known as “silver fillings”, but a dental amalgam is actually a mixture of mercury, silver, tin, copper, and zinc. Mercury, which makes up about 50% of the compound, is used to bind the metals together. Generally, the amount of mercury in a filling is considered too small to be harmful, as studies have shown that the amount of mercury in a filling is less than the amount most people consume in the food they eat.

Amalgam fillings are resistant to wear and relatively inexpensive. However, due to their dark color, they are more noticeable than porcelain or composite restorations, and are not usually used in very visible areas, such as the front teeth.

What Happens When You get a Dental Filling?

During a checkup, your dentist will use a small mirror to examine the surfaces of each tooth. If your dentist detects a cavity that needs to be filled, he or she will first remove the decay and clean the affected area. The cleaned-out cavity will then be filled with one of the materials described above.

Schedule an Appointment with Hansen Dentistry

If you would like to have your teeth cleaned and inspected for cavities, stop on by Hansen Dentistry! Our friendly Apex dentist, Dr. Hansen, will help you achieve your perfect smile. To schedule an appointment, click here.