Restoration of severely damaged endodontically treated premolars: The influence of the endo-core length on marginal integrity and fatigue resistance of lithium disilicate CAD-CAM ceramic endocrowns

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F18%3A00494334" target="_blank" >RIV/67985891:_____/18:00494334 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21220/18:00316128

Result on the web

<a href="http://dx.doi.org/10.1016/j.jdent.2017.10.011" target="_blank" >http://dx.doi.org/10.1016/j.jdent.2017.10.011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jdent.2017.10.011" target="_blank" >10.1016/j.jdent.2017.10.011</a>

Result language

angličtina

Original language name

Restoration of severely damaged endodontically treated premolars: The influence of the endo-core length on marginal integrity and fatigue resistance of lithium disilicate CAD-CAM ceramic endocrowns

Original language description

Objectives To explore fatigue limits of ceramic endocrowns for premolars. Methods Forty-eight devitalized premolars were cut at the CEJ. They were restored with standardized CAD–CAM lithium disilicate reinforced ceramic restorations (IPS e.max CAD, Ivoclar-Vivadent) and divided into four Groups (n = 12): overlays (Group A, no endo-core, negative control), endocrowns with an endo-core of 2 mm (Group B), 4 mm (Group C) and crowns with post and core (Group D, positive control). All specimens were first submitted to thermo-mechanical cyclic loading (TCML)(1.7 Hz, 49 N, 600000 cycles, 1500 thermo-cycles). Margins were analysed before and after the loading. Survived specimens were then submitted to cyclic isometric stepwise loading (5 Hz, 200N to 1200N) until completion of 105000 cycles or failure. In case of fracture, fragments were analysed using SEM and failure mode was determined. Results of stepwise loading were statistically analysed by Kaplan–Meier life survival analysis and log rank test (p = 0.05). Results All the specimens survived the TCML test except four specimens of Group A (early restorations’ debonding). No difference in percentages of closed margins was found between endocrowns (Groups B, C) and crowns (Group D). After the stepwise test, differences in survival within the groups were not statistically significant. Most of restorations experienced non-reparable fracture. Conclusions Endocrowns with both 2-mm and 4-mm long endo-cores displayed outcomes after fatigue equivalent to classical crowns. Results of this study discourage the use of flat overlays with only adhesive retention. Clinical significance When restoring extremely destroyed devitalized premolars, adhesive strategies should be coupled to a macro-mechanical retention in the root.

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

30404 - Biomaterials (as related to medical implants, devices, sensors)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Name of the periodical

Journal of Dentistry

ISSN

0300-5712

e-ISSN

—

Volume of the periodical

68

Issue of the periodical within the volume

JAN 2018

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

41-50

UT code for WoS article

000418891700006

EID of the result in the Scopus database

2-s2.0-85034962463