Most people will develop a cavity at some time in their lifetime. Modern dentistry offers many options that blend long-lasting strength and attractiveness. Dr. Johnson will first remove the decay and then fill the tooth using a tooth-colored composite resin. Resin fillings are durable long-term for most fillings and are virtually undetectable when you smile. Because they can be matched to your natural shade, they can also be used for filling cavities in areas on front teeth and near the gum line.