title: Comparative evaluation of fracture resistance of root dentin to resin sealers and a MTA sealer: An in vitro study.
abstract: BACKGROUND
  Endodontic obturating materials should form monoblocks, reinforcing the treated teeth against fracture.
  
  
  OBJECTIVE
  To evaluate and compare the effect of two resin sealers and a MTA sealer on the fracture resistance of endodontically treated teeth.
  
  
  METHODS
  Fifty single-rooted mandibular premolars, decoronated at cemento-enamel junction, were divided into 5 groups (n = 10 each). Group 1 and group 2 served as negative and positive controls. Cleaning and shaping of root canals was done using ProTaper rotary files and 3% sodium hypochlorite irrigation. Obturation was done using AH plus (Dentsply, Germany) (group 3), MetaSEAL (Parkell, USA) (group 4), MTA Fillapex (Angeles, Brazil) (group 5) sealers and gutta-percha. Teeth were subjected to vertical loading using a universal testing machine and the point at which fracture of the roots occurred was recorded. The data was subjected to statistical analysis using one way analysis of variance (ANOVA) followed by pair-wise comparison using Tukey's Post-hoc test.
  
  
  RESULTS
  AH Plus showed better fracture resistance among the sealer groups. Statistically, no significant difference was found between MetaSEAL and Fillapex groups.
  
  
  CONCLUSIONS
  MTA Fillapex as a root canal sealer was not able to reinforce the tooth against fracture.
authors.affiliation: Departments of Conservative Dentistry and Endodontics, GITAM Dental College, Rushikonda, Visakhapatnam, Andhra Pradesh, India.
authors.forename: Jyothi
authors.initials: J
authors.lastname: Mandava
authors.affiliation: Departments of Conservative Dentistry and Endodontics, GITAM Dental College, Rushikonda, Visakhapatnam, Andhra Pradesh, India.
authors.forename: Pin Chen
authors.initials: PC
authors.lastname: Chang
authors.affiliation: Departments of Conservative Dentistry and Endodontics, GITAM Dental College, Rushikonda, Visakhapatnam, Andhra Pradesh, India.
authors.forename: B
authors.initials: B
authors.lastname: Roopesh
authors.affiliation: Departments of Conservative Dentistry and Endodontics, GITAM Dental College, Rushikonda, Visakhapatnam, Andhra Pradesh, India.
authors.forename: Md Ghazan
authors.initials: MG
authors.lastname: Faruddin
authors.affiliation: Departments of Conservative Dentistry and Endodontics, GITAM Dental College, Rushikonda, Visakhapatnam, Andhra Pradesh, India.
authors.forename: A
authors.initials: A
authors.lastname: Anupreeta
authors.affiliation: Departments of Conservative Dentistry and Endodontics, GITAM Dental College, Rushikonda, Visakhapatnam, Andhra Pradesh, India.
authors.forename: Ch
authors.initials: Ch
authors.lastname: Uma
keywords: Endodontic monoblocks; MTA; root canal sealers; universal testing machine; vertical root fracture