Evaluation of the repair of mechanical furcation perforations using amalgam, gutta-percha, or indium foil

The response of supporting tissues to the repair of furcation perforations using amalgam, gutta-percha, or indium foil was investigated. Forty-eight maxillary posterior teeth in eight adult mongrel dogs were treated endodontically. Immediately thereafter, mechanical perforations were created in the furcations and promptly filled with the three test materials. The coronal openings were all filled with amalgam. The animals were divided into a 2-month group and a 6-month group. Based on clinical, radiographic, and histological findings, amalgam and gutta-percha showed significantly better results than indium foil. No significant differences existed between amalgam and gutta-percha.