Accessibility Tools

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

A.M. Pawar, D. Barfiwala, M. Pawar, Z. Metzger, A. Kfir, N. Jain

Journal of Conservative Dentistry. 2016; 19:138-42


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).

CONCLUSIONS: The samples instrumented by the SAF exhibited a better fracture resistance.


The full article is available on the website of the Journal of Conservative Dentistry.

pawar microcrack saf 


Sign up to get the latest news
Subscribe To Our Newsletter
Invalid Input

ReDent Nova GmbH & Co. Kg.

Am Borsigturm 70
13507 Berlin, Germany