Comparative evaluation of three types of fiber orientation techniques on fracture resistance of endodontically treated premolars restored with composite resin: An in vitro study
Sowmya Mudunuri, K. Madhu Varma, Girija S. Sajjan, R. Kalyan Satish, Sai Dinesh Jetty, Sailakshmi Indukuri- Immunology and Microbiology (miscellaneous)
- Dentistry (miscellaneous)
- Oral Surgery
- Anatomy
ABSTRACT
Introduction:
A new technique of fiber reinforcement (horizontal + base fiber [HBF]) in the restoration of endodontically treated teeth (ETT) with composite resin was proposed.
Aim:
This study aims to compare three different types of fiber orientation techniques on fracture resistance of ETT.
Materials and Methodology:
Sixty intact extracted human maxillary premolars were assigned to five groups (n = 12). Group 1 intact teeth (control). The teeth in Groups 2–5 received endodontic treatment and a MOD cavity preparation and restored with composite resin with polyethylene fiber at different positions. Group 2: No fiber group (NF), Group 3: Occlusal fiber group (OF), Group 4: Horizontal fiber group (HF), and Group 5: HBF group. After thermocycling, the specimens were loaded using a universal testing machine until fracture and the fracture patterns were analyzed.
Statistical Analysis:
The data were analyzed statistically using analysis of variance with Tukey’s post hoc test (fracture load) and Chi-square test (fracture patterns).
Results:
Fiber-reinforced groups (OF, HF, HBF) showed significantly higher fracture resistance compared to NF group (
Conclusion:
Restoring ETT with different techniques of fiber reinforcement resulted in the improvement of the fracture resistance comparable to that of intact teeth. The newly proposed technique of fiber insertion might be considered as an alternative to earlier techniques for the reinforcement of ETT.