title: Comparative evaluation of intracanal sealing ability of mineral trioxide aggregate and glass ionomer cement: An in vitro study.
abstract: OBJECTIVE
  The purpose of this study was to compare the sealing ability of Mineral Trioxide Aggregate (MTA) and Glass Ionomer Cement (GIC) when used over gutta-percha as intracanal sealing materials. The study also evaluated the sealing ability of Zinc oxide eugenol (ZOE) cement and Acroseal sealer.
  
  
  METHODS
  Teeth were obturated with gutta-percha using sealer ZOE (group A, C, D) and Acroseal (group B). The groups were further divided into 2 subgroups (15 premolars each) on the basis of intracanal sealing material used: GIC subgroups (A1, B1) and MTA in subgroups (A2, B2). The clearing technique was used in this study for leakage evaluation. Seventy mandibular premolars were prepared using step-back technique and divided into experimental groups A and B (30 premolars each) and the positive and negative control groups C and D (5 premolars each).
  
  
  METHODS
  Coronal microleakage was determined under stereomicroscope using 15X magnification. Data was statistically analyzed using one-way ANOVA followed by Post-Hoc Multiple comparison (Bonferroni).
  
  
  RESULTS
  MTA group leaked significantly less than GIC group (P < 0.05). Acroseal exhibited better sealing ability than ZOE sealer. Teeth with no intracanal barrier showed almost complete leakage.
  
  
  CONCLUSIONS
  MTA may be preferred over GIC as an intracanal barrier.
authors.affiliation: Department of Conservative Dentistry and Endodontics, Gian Sagar Dental College and Research Center, Banur, Punjab, India.
authors.forename: Gauri
authors.initials: G
authors.lastname: Malik
authors.affiliation: Department of Conservative Dentistry and Endodontics, D.A.V(C), College, Yamuna Nagar, Haryana, India.
authors.forename: Poonam
authors.initials: P
authors.lastname: Bogra
authors.affiliation: Oral Health Science Centre, PGIMER, Chandigarh, India.
authors.forename: Simranjeet
authors.initials: S
authors.lastname: Singh
authors.affiliation: Department of Prosthodontics, Himachal Dental College, Sundarnagar, Himachal Pradesh, India.
authors.forename: Rupandeep K
authors.initials: RK
authors.lastname: Samra
keywords: Acroseal sealer; GIC; MTA; clearing technique; intracanal barrier; intracanal sealing