Journal of Conservative Dentistry
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Year : 2016  |  Volume : 19  |  Issue : 2  |  Page : 138-142

Assessment of the fracture resistance of teeth instrumented using 2 rotary and 2 reciprocating files versus the Self-Adjusting File (SAF): An ex vivo comparative study on mandibular premolars

1 Department of Conservative Dentistry and Endodontics, D. Y. Patil Dental School and Hospital, Pune, Maharashtra, India
2 Department of Conservative Dentistry and Endodontics, Government Dental College and Hospital, Mumbai, Maharashtra, India
3 Department of Endodontology, Tel Aviv University, Tel Aviv, Israel
4 Department of Conservative Dentistry and Endodontics, Hitkarini Dental College and Hospital, Jabalpur, Madhya Pradesh, India

Correspondence Address:
Ajinkya M Pawar
Y-10/155, Government Colony, Bandra East, Mumbai - 400 051, Maharashtra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-0707.178692

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Aim: Current ex vivo study compared fracture resistance of teeth instrumented using 5 endodontic files, filled with Gutta-percha and AH Plus. Materials and Methods: Sixty freshly extracted, single-rooted mandibular premolars were acquired and decoronated to obtain 15 mm segments. These samples were randomly divided into six groups (n = 10). Group 1 served as the control containing untreated samples (without instrumentation or filling). In Groups 2-6, samples were instrumented using rotary (Universal ProTaper and Revo-S), reciprocating (WaveOne and RECIPROC; ), and self-adjusting file (SAF), respectively. Following instrumentation, the samples were filled by lateral compaction with Gutta-percha and AH Plus. A week later, after the sealer was completely set, a vertical load was applied to the specimen's canal in each group until fracture. The loads required for fracture were recorded, and statistical analysis was performed. Results: The mean fracture load differed significantly among the groups (P < 0.01; one-way ANOVA). Tukey's post-hoc tests revealed that the fracture resistance was similar in the control and SAF groups (P > 0.05) and was significantly higher than that of the 2 rotary and reciprocating groups (P < 0.01). Conclusion: The samples instrumented by the SAF exhibited a better fracture resistance.

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