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- Title
Fatigue life of WaveOne and ProTaper instruments operated in reciprocating or continuous rotation movements and subjected to dynamic and static tests.
- Authors
Lopes, Hélio P.; Vieira, Márcia V. B.; Elias, Carlos N.; Siqueira Jr., José F.; Mangelli, Marcelo; Lopes, Weber S. P.; Vieira, Victor T. L.; Andrade Rocha, Edilene
- Abstract
Objectives: This study evaluated the influence of reciprocating movement on the fatigue life of root canal instruments subjected to static and dynamic tests. Materials and methods: The rotary NiTi instruments used in this study were WaveOne and ProTaper F2 (both from Dentsply Maillefer, Ballaigues, Switzerland). The instruments were initially subjected to a cantilever-bending test, then to static and dynamic fatigue tests. WaveOne instruments were operated in reciprocating movement and ProTaper in continuous rotation. Results: The mean bending resistance values (maximum load in grams) of the instruments were as follows: WaveOne = 544.8; ProTaper F2 = 555.4. No significant difference was observed between the instruments tested (P > 0.05). The mean time to fracture (in seconds) of the instruments subjected to static and dynamic tests were as follows: WaveOne = 93.5 (static) and 267.6 (dynamic); ProTaper F2 = 57.8 (static) and 94.1 (dynamic). Student's t test revealed significant differences in all tests (P < 0.05). Conclusion: The findings revealed that instruments operated in a reciprocating movement and in the dynamic testing model presented prolonged fatigue life.
- Subjects
DYNAMIC testing; ENDODONTICS; DENTAL technology; DENTAL materials; DENTAL equipment
- Publication
Endodontic Practice Today, 2013, Vol 7, Issue 3, p217
- ISSN
1753-2809
- Publication type
Article