title: Marginal adaptation of newer root canal sealers to dentin: A SEM study.
abstract: OBJECTIVE
  This in vitro study evaluated and compared the marginal adaptation of three newer root canal sealers to root dentin.
  
  
  METHODS
  Thirty freshly extracted human single-rooted teeth with completely formed apices were taken. Teeth were decoronated, and root canals were instrumented. The specimens were randomly divided into three groups (n = 10) based upon the sealer used. Group 1 - teeth were obturated with epoxy resin sealer (MM-Seal). Group 2 - teeth were obturated with mineral trioxide aggregate (MTA) based sealer (MTA Fillapex), Group 3 - teeth were obturated with bioceramic sealer (EndoSequence BC sealer). Later samples were vertically sectioned using hard tissue microtome and marginal adaptation of sealers to root dentin was evaluated under coronal and apical halves using scanning electron microscopy (SEM) and marginal gap values were recorded.
  
  
  RESULTS
  The data were statistically analyzed by two-way ANOVA and Tukey's multiple post hoc test. The highest marginal gap was seen in Group 2 (apical-16680.00 nm, coronal-10796 nm) and the lowest marginal gap was observed in Group 1 (apical-599.42 nm, coronal-522.72 nm). Coronal halves showed superior adaptation compared to apical halves in all the groups under SEM.
  
  
  CONCLUSIONS
  Within the limitations of this study epoxy resin-based MM-Seal showed good marginal adaptation than other materials tested.
authors: Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India.
authors: Swapnika
authors: S
authors: Polineni
authors: Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India.
authors: Nagesh
authors: N
authors: Bolla
authors: Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India.
authors: Pragna
authors: P
authors: Mandava
authors: Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India.
authors: Sayesh
authors: S
authors: Vemuri
authors: Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India.
authors: Madhusudana
authors: M
authors: Mallela
authors: Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India.
authors: Vijaya Madhuri
authors: VM
authors: Gandham
keywords: EndoSequence BC sealer; MM-Seal; marginal adaptation; mineral trioxide aggregate Fillapex