A predictable method for retrieval of silver cones using ultrasonics

With the introduction of newer instruments, such as the Dental Operating Microscopes (DOMs) and Advanced Ultrasonic systems in Endodontics, previously untreatable cases are now being attempted successfully.¹ One of the main considerations during the revisit into the earlier filled root canal space is the nature of the filling material, as this too has changed and evolved over the years. Clinical data is available today regarding re-treatment of cases dealing with removal of gutta-percha, the material of choice in the recent past.^2,3 However, a review of the literature carried out by the authors revealed that there were no documented reports illustrating the use of microscopes in combination with ultrasonics for the removal of silver cones.

Protocols to be followed for silver cone retrieval vary from that for gutta-percha removal⁴ and, since cases obturated with silver cones do still present themselves routinely in the dental practice, it is the aim of this article to suggest a predictable and simple protocol for the removal of these using the currently available technologies. This case report presents the re-treatment, using a Dental Operating Microscope, of three lower anterior teeth previously obturated with silver cones.