Four-surface fillings are fillings that cover four of the five tooth surfaces on one tooth. A four-surface filling can contain a mixture of metals including silver, copper, tin, and liquid mercury. Generally, this process takes about an hour depending on the amount of decay that needs to be removed prior to filling.

"B," which stands for buccal, is the surface of the tooth that faces the cheek.

D2330-D2394: Tooth colored filling – Resin-based composite Tooth colored fillings are a type of malleable, composite material that contains a resin and hardener, and are used to replace the natural tooth structure that has been eroded via trauma or decay during a filling procedure.

D2150 Amalgam - two surfaces, primary or permanent No Tooth and surface designations required. Allowance includes polishing. D2160 Amalgam - three surfaces, primary or permanent No Tooth and surface designations required.