[Clinical cases of teeth previously treated by endodontic restoration using intra-canal pins of gold-coated brass].

The authors, in previous studies, showed that morphological alterations on gold coated brass pins, extracted after some years of staying in dental roots, are the consequence of a localized corrosion attack, produced by anaerobic bacteria, whose presence is confirmed by the high concentration of sulphur on the most attacked spots. Since, by using a suitable technique of pin inserting, the corrosion should not occur, it was supposed that root resorption could lead to favourable conditions to create corrosion. In order to bear out this assumption, 10 meaningful clinical cases of teeth previously restored by gold coated radicular pins are critically evaluated.