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

AIM: 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). METHODOLOGY: 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. RESULTS: 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. CONCLUSION: Biodentine showed significantly better marginal adaptation as compared to MTA and Geristore.