Comparative evaluation of marginal adaptation of mineral trioxide aggregate, Biodentine, and geristore as a root end filling material: An in vitro scanning electron microscope study.

Abstract

The aim of this in vitro study was to measure the quality of marginal adaptation of three root end filling materials by scanning electron microscope (SEM). Thirty extracted human permanent single-rooted single canal maxillary anterior teeth with mature apices were prepared up to 60 K-file and obturated. Teeth were resected 3 mm from the apex using a cross-cut fissure bur at 90° angle to the long axis of the tooth. Root end cavities of 3 mm were prepared in each of the teeth with an ultrasonic tip to receive the root end filling material. Group 1 - mineral trioxide aggregate (MTA), Group 2 - Biodentine, and Group 3 - Geristore. The samples were mounted in resin blocks for sectioning with a hard-tissue microtome and sectioned apically at 1 mm and 2 mm levels from the apex. They were gold sputtered and viewed under SEM for evaluating the adaptation of the material to the canal walls. The mean value for Group II (Biodentine) was lower than the mean value for Group I (MTA) and Group III (Geristore) at 1 mm and 2 mm. Biodentine showed significantly better marginal adaptation as compared to MTA and Geristore.