The Chairside Instructor 25 Anterior (Front) Restorations These drawings show some of the positions where restorations are often needed. The type of material used depends partly on where the restoration is located. Cervical restoration Common options include composite resin, dental amalgam or glass ionomers Interproximal restoration Composite resin Incisal restoration Composite resin Posterior (Back Teeth) Restorations One-surface restoration, dental amalgam Three-surface restoration, cast or gold alloys One-surface restoration, composite resin Three-surface onlay, which restores the biting surface and one cusp Two-surface restoration Pin-retained restoration Typical Restorations (Fillings) Decay, Cavities and Restorations