Replica technique for scanning electron microscope examination of occlusal amalgam margins

A new replicating technique, the modified adhesion relief method, was developed to investigate the marginal integrity of the occlusal surface of amalgam restorations over a period of years. The accuracy of the replicas was confirmed by scanning electron microscope comparison with the original teeth. The tooth to be studied need not be extracted. The technique makes it possible to continue the observation of restored teeth in the oral cavity for long periods. The technique does not require special equipment and is uncomplicated.