Influence of Central and Peripheral Dentin on Micro-tensile Bond Strength Estimated Using a Competing Risk Model

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985807%3A_____%2F21%3A00537101" target="_blank" >RIV/67985807:_____/21:00537101 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11110/21:10419244 RIV/00064165:_____/21:10419244

Result on the web

<a href="http://dx.doi.org/10.1016/j.jmbbm.2020.104295" target="_blank" >http://dx.doi.org/10.1016/j.jmbbm.2020.104295</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmbbm.2020.104295" target="_blank" >10.1016/j.jmbbm.2020.104295</a>

Result language

angličtina

Original language name

Influence of Central and Peripheral Dentin on Micro-tensile Bond Strength Estimated Using a Competing Risk Model

Original language description

The bonding performance of dental adhesives is most frequently evaluated using the micro-tensile bond strength (μTBS) test. Despite lacking evidence, peripheral specimens are often discarded to avoid regional variability. This study, therefore, examined whether μTBS to central and peripheral dentin differed. Dentin surfaces of extracted human molars were bonded with various self-etch adhesives, built up with a resin composite, cut into beams, and stressed in tension. Failure mode was classified as adhesive, cohesive in dentin, or other using scanning electron microscopy. Since cohesive failures in dentin were frequent and could confound μTBS results, the data from central/peripheral dentin were analyzed using a Weibull competing risk (CR) model distinguishing failure modes, and its outcomes were compared to a conventional failure mode non-distinguishing Weibull model. Based on the strength data of cohesively failed specimens, the CR model also estimated the strength of dentin. For comparison, the ultimate tensile strength (UTS) of dentin was measured in both regions. The conventional model suggested that peripheral μTBS was higher than central μTBS. Conversely, the CR model disclosed no significant difference in μTBS between the regions but indicated a higher strength of peripheral dentin. This finding was confirmed by UTS measurements, and further supported by the significantly higher incidence of cohesive failures in central dentin. Therefore, peripheral specimens can be used in the μTBS test as well as central ones, but a CR model should be used for statistical analysis if cohesive failures in dentin are frequent, as the strength of peripheral dentin is higher.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10103 - Statistics and probability

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Journal of the Mechanical Behavior of Biomedical Materials

ISSN

1751-6161

e-ISSN

1878-0180

Volume of the periodical

115

Issue of the periodical within the volume

March 2021

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

104295

UT code for WoS article

000618635800004

EID of the result in the Scopus database

2-s2.0-85098962285