| Cyclic fatigue of different nickel-titanium endodontic rotary instruments. | |
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MedLine Citation:
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PMID: 16997084 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: A comparative study of the fatigue resistance of rotary nickel-titanium endodontic instruments was performed with the aim of assessing the influence of both instrument design and surface treatment on flexural fracture. STUDY DESIGN: To evaluate fatigue resistance of different rotary instruments, a total of 120 instruments were tested; these came from different sources: ProFile, RaCe, K3, Hero, and Mtwo. To compare the effect of electro-polishing procedures on fatigue resistance, a group of RaCe instruments (which are normally electro-polished) without surface treatment was used. A scanning electron microscope (SEM) study for each instrument was performed before and after fatigue study to determine the mode of fracture and the aspect of tips and cross-sectional surface areas. RESULTS: ProFile instruments gave the best values for fatigue resistance. It was seen that for RaCe instruments the surface treatment reduces the presence of micro-cracks, surface debris, and machining damage. CONCLUSIONS: This study shows that the instrument design often proves to be an important factor in the fatigue resistance of NiTi rotary instruments. In RaCe instruments the electro-polishing surface treatment increases the fracture-related fatigue resistance. |
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Authors:
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Teresa Roberta Tripi; Antonio Bonaccorso; Guglielmo Guido Condorelli |
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Publication Detail:
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Type: Comparative Study; Journal Article Date: 2006-07-14 |
Journal Detail:
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Title: Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics Volume: 102 ISSN: 1528-395X ISO Abbreviation: Oral Surg Oral Med Oral Pathol Oral Radiol Endod Publication Date: 2006 Oct |
Date Detail:
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Created Date: 2006-09-25 Completed Date: 2006-10-24 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9508562 Medline TA: Oral Surg Oral Med Oral Pathol Oral Radiol Endod Country: United States |
Other Details:
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Languages: eng Pagination: e106-14 Citation Subset: D; IM |
Affiliation:
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Faculty of Dentistry, University of Catania, Catania, Italy. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Dental Alloys* / chemistry Dental Instruments* Dental Polishing Dental Stress Analysis Equipment Design Equipment Failure Materials Testing Microscopy, Electron, Scanning Nickel* / chemistry Pliability Root Canal Preparation / instrumentation* Surface Properties Titanium* / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Dental Alloys; 12035-60-8/titanium nickelide; 7440-02-0/Nickel; 7440-32-6/Titanium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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