This is an example of what a cavity looks like in a tooth. Often the cavity gets larger as it goes into the tooth. A composite filling can be a conservative way to fill in the cavity and it can be matched to the shade of the tooth.
I take both my daughters to this place. The staff is very polite and courteous and their pricing is very reasonable. We’ve had teeth cleaned, cavities filled, and braces put on my oldest daughter, and we are about to have them put braces on my youngest. Dr. Compton and his staff are by far the best in the area and I tell everyone I know about these guys and gals.