title: Comparative evaluation of sealing ability of glass ionomer-resin continuum as root-end filling materials: An in vitro study.
abstract: OBJECTIVE
  Root-end filling is a prudent procedure aimed at sealing the root canal to prevent penetration of tissue fluids into the root canals. An ideal root-end filling material should produce a complete apical seal. Therefore, the aim of this study is to compare the leakage behavior of four different root-end filling materials.
  
  
  METHODS
  Sixty-eight maxillary central incisors were obturated with laterally condensed gutta-percha and AH plus sealer. The roots were resected at the level of 3 mm perpendicular to the long axis of the tooth. Root-end cavities were prepared with straight fissure stainless steel bur. The teeth were then divided into four experimental and two control groups, and cavities restored as per the groupings. The teeth were immersed in methylene blue for 48 h, split longitudinally, and dye penetration was measured.
  
  
  RESULTS
  A highly significant difference existed in the mean dye penetration of Group I (conventional glass ionomer) and the other groups (resin-modified glass ionomer, polyacid-modified composite, and composite resin). There was no statistically significant difference among the three groups.
  
  
  CONCLUSIONS
  (1) Significant difference was found in the dye penetration values of conventional glass ionomer cement and other groups. (2) No statistically significant difference was found in the dye penetration values of groups II, III, and IV.
authors.affiliation: Department of Conservative Dentistry and Endodontics, College of Dentistry, Jazan University, Jizan, Saudi Arabia.
authors.forename: Hitesh
authors.initials: H
authors.lastname: Chohan
authors.affiliation: Department of Prosthodontics, College of Dentistry, Jazan University, Jizan, Saudi Arabia.
authors.forename: Harisha
authors.initials: H
authors.lastname: Dewan
authors.affiliation: Department of Conservative Dentistry and Endodontics, J.S.S. Dental College and Hospital, Mysore, Karnataka, India.
authors.forename: B M
authors.initials: BM
authors.lastname: Annapoorna
authors.affiliation: Department of Conservative Dentistry and Endodontics, J.S.S. Dental College and Hospital, Mysore, Karnataka, India.
authors.forename: M K
authors.initials: MK
authors.lastname: Manjunath
keywords: Dye leakage; glass ionomer-resin continuum; root-end filling; root-end section