Marginal adaptation of mineral trioxide aggregate (MTA) compared with amalgam as a root‐end filling material: a low‐vacuum (LV) versus high‐vacuum (HV) SEM study

Abstract

This study showed that MTA produced a superior marginal adaptation to amalgam, and that LVW conditions showed the lowest gap size. Gap size was influenced by the method of SEM viewing. If only HV SEM viewing conditions are used for MTA and amalgam root-end fillings, a correction factor of 3.5 and 2.2, respectively, may be used to enable relative comparisons of gap size to LVW conditions.