Influence of Instrument Taper on the Fracture Resistance of Endodontically Treated Teeth - An In vitro Study

Abstract

Aim: To assess and contrast the effect of rotary files with a 4% and 6% taper on the fracture resistance of teeth that have undergone endodontic treatment. Materials and Methods: Single rooted mandibular premolar was collected (sample size- 50). Root canal treatment was done using 4% and 6% rotary file system and obturated. The Tooth sample was subjected to a fracture test. The force required to fracture the roots was measured. The Mann Whitney test was used for statistical analysis. Results: Tooth treated with 4% tapered instrumentation had better fracture resistance when compared to 6% within its limitations. The mean fracture load for 4% taper was approximately 475 and for 6% tapered instrumentation it was 474. Discussion: In endodontically treated teeth, vertical root fracture is a problem that necessitates extraction. Vertical root fractures are predisposed to by the removal of cavities, access cavity preparations, canal instrumentation methods, and prepared canal diameter. Safety and effectiveness of rotary nickel-titanium files are jointly influenced by the file's design, its use, and its manufacturing process. Conclusion: We can conclude our topic by telling more the instrument taper less the fracture resistance.