Survival Analysis of Factors Influencing Cyclic Fatigue of Nickel-Titanium Endodontic Instruments

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11110%2F15%3A10311842" target="_blank" >RIV/00216208:11110/15:10311842 - isvavai.cz</a>

Alternative codes found

RIV/61989592:15310/15:33155055 RIV/70883521:28140/15:43873918

Result on the web

<a href="http://dx.doi.org/10.1155/2015/189703" target="_blank" >http://dx.doi.org/10.1155/2015/189703</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1155/2015/189703" target="_blank" >10.1155/2015/189703</a>

Result language

angličtina

Original language name

Survival Analysis of Factors Influencing Cyclic Fatigue of Nickel-Titanium Endodontic Instruments

Original language description

Objective. The aim of this study was to validate a survival analysis assessing the effect of type of rotary system, canal curvature, and instrument size on cyclic resistance. Materials and Methods. Cyclic fatigue testing was carried out in stainless steel artificial canals with radii of curvature of 3 or 5 mm and the angle of curvature of 60 degrees. All the instruments were new and 25 mm in working length, and ISO colour coding indicated the instrument size (yellow for size 20; red for size 25). Wizard Navigator instruments, Mtwo instruments, ProTaper instruments, and Revo-S instruments were passively rotated at 250 rotations per minute, and the time fracture was being recorded. Subsequently, fractographic analysis of broken tips was performed by scanning electron microscope. The data were then analysed by the Kaplan-Meier estimator of the survival function, the Cox proportional hazards model, the Wald test for regression covariates, and the Wald test for significance of regression model. Conclusion. The lifespan registered for the tested instruments was Mtwo > Wizard Navigator > Revo-S > ProTaper; 5 mm radius > 3 mm radius; and yellow > red in ISO colour coding system.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BB - Applied statistics, operational research

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Advances in Materials Science and Engineering

ISSN

1687-8434

e-ISSN

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Volume of the periodical

2015

Issue of the periodical within the volume

September

Country of publishing house

EG - EGYPT

Number of pages

6

Pages from-to

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UT code for WoS article

000362755800001

EID of the result in the Scopus database

2-s2.0-84944202920