title: Comparison of fracture resistance of endodontically treated teeth restored with nanohybrid, silorane, and fiber reinforced composite: An in vitro study.
abstract: BACKGROUND
  The present study was undertaken to evaluate the most suitable restorative for badly mutilated endodontically treated teeth.
  
  
  OBJECTIVE
  To evaluate and compare the fracture resistance of endodontically treated premolars restored with conventional nanohybrid, silorane composite with glass fibers and newer fiber-reinforced composite in mesio-occluso-distal (MOD) cavities.
  
  
  METHODS
  Sixty extracted human maxillary premolars were selected. Fifteen intact teeth served as positive controls (Group 1). Endodontic therapy was done in the remaining 45 teeth. MOD cavities were prepared in all the teeth with standardized dimensions and were randomly divided into three groups (Group 2 - nanohybrid + glass fibers, Group 3 - silorane + glass fibers, and Group 4 - fiber-reinforced composite). Restorations were done for all groups. Fracture resistance was measured by Instron universal testing machine.
  
  
  METHODS
  One-way anova test and Tukey's post hoc test.
  
  
  RESULTS
  Highest fracture resistance was shown by intact teeth group followed by fiber-reinforced composite, nanohybrid, and silorane, respectively. Statistically Significant difference was revealed by anova test (P < 0.0001) and Tukey's post hoc test (P < 0.0001).
  
  
  CONCLUSIONS
  Among the experimental groups, fiber-reinforced composite showed the highest fracture resistance. Statistically significant difference was observed for all the groups.
authors: Department of Conservative Dentistry and Endodontics, K.M. Shah Dental College, Sumandeep Vidyapeeth, Vadodara, Gujarat, India.
authors: Priyanka Shripad
authors: PS
authors: Bilgi
authors: Department of Conservative Dentistry and Endodontics, K.M. Shah Dental College, Sumandeep Vidyapeeth, Vadodara, Gujarat, India.
authors: Nimisha Chinmay
authors: NC
authors: Shah
authors: Department of Conservative Dentistry and Endodontics, K.M. Shah Dental College, Vadodara, Gujarat, India.
authors: Parth Pinakinbhai
authors: PP
authors: Patel
authors: Department of Conservative Dentistry and Endodontics, K.M. Shah Dental College, Sumandeep Vidyapeeth, Vadodara, Gujarat, India.
authors: Deepa S
authors: DS
authors: Vaid
keywords: Fiber-reinforced composite; fracture resistance; glass fibers; mesio-occluso-distal cavity; nanohybrid; silorane