Copper band matrix for large Class V amalgam restorations

Class V cavities present special problems in restoration and maintenance. The subsequent health of the gingival tissue and the relative immunity toward recurrent caries depends not only on the age of the patient and patient's oral hygiene but to a great extent on the excellence of the restoration. This excellence is achieved by the operator's detailed design of the preparation, moisture control, and restoration and material finishing. Dental amalgam continues to be the material of choice in many clinical situations. The restoration of a large class V lesion that results from replacement of a defective restoration or extensive caries benefits greatly when a copper band matrix is used because of its ability to be shaped and contoured and its rigidity. In large class V cavities, the copper band creates a "false" wall that is required for confinement of the amalgam as it must be packed under pressure. This confinement of the cavity is necessary because it restricts the amount of excess material which ultimately is important in the restoration of the tooth and its long-term success.