Comparison of retrofill seal of MTA and Amalgam with and without Amalgam bond in vitro

A successful endodontic surgery is due to adequate apical seal. Amalgam is used as a retrofill material but in long term the prognosis is not known. Amalgam bonding systems that provide bonding of Amalgam to dentin and MTA (mineral trioxide aggregate) are recently introduced. The aim of this study was to evaluate sealing ability of MTA, Amalgam and Amalgam with scotch bond M.P as retrofilling materials. Methods & Materials: In this experimental study 70 human single root extracted teeth were used, the teeth were divided randomly in to three experimental groupes: MTA, Amalgam, Amalgam with scotch bond M.P and two positive and negative control groups. Retrofilling materials were used in experimental groups then dye penetration by %2 methylen blue was performed for evaluation of leakage. Kruskal – Wallis and Mann – Whitney tests were used for statistical analysis. Amalgam+amalgam bond had better sealing than MTA and Amalgam in dry and wet condition (P<0.001). Amalgam leakage was approximately equal to MTA in dry condition but in wet condition amalgam had better seal (P<0.05). In comparison of each material in dry and wet condition no significance was found (P>0.05). This study recommends the use of amalgam + dentin bond as retrofills.