Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Critical considerations on load-to-failure test for monolithic zirconia molar crowns
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymeric Materials.
Show others and affiliations
2018 (English)In: Journal of The Mechanical Behavior of Biomedical Materials, ISSN 1751-6161, E-ISSN 1878-0180, Vol. 87, p. 180-189Article in journal (Refereed) Published
Abstract [en]

Application of monolithic zirconia crowns (MZCs) with reduced thickness to the molar region has been proposed, but potential complications have yet to be fully evaluated in laboratory tests. The present study aimed to develop a clinically relevant load-to-failure test in combination with fatigue treatments involving thermal and mechanical cycling (TC and MC) to evaluate the fracture resistance of molar MZCs. MZCs with a minimal thickness of 0.5 mm were bonded to dies made of resin-based composite (RBC), epoxy resin (EP), or polyoxymethylene-copolymer (POM-C). The samples were either untreated (UT) or subjected to TC (5–55 °C for 1 × 105 cycles) and MC (300 N for 2.4 × 106 cycles). The stress generated by TC and MC was simulated by finite element modeling. The load-to-failure test was performed using an inverse V-shaped two-plane indenter and was followed by fractographic analysis. The median values of fracture load for MZC/RBC and MZC/EP in the TC group were significantly lower than those in the UT group. MC also decreased the median value of fracture load for MZC/RBC significantly, but not that for MZC/EP and MZC/POM-C. Fractography revealed that the fracture started in the cervical area in all groups, which is similar to clinically failed crowns. The simulation confirmed stress concentration at the cervical area in both TC and MC groups. The present study suggests that the load-to-failure test using a two-plane indenter could induce clinically relevant fracture of MZCs, the vulnerability of the MZCs depends largely on the die material employed, and MZCs are more likely to be damaged by thermal fatigue than mechanical fatigue.

Place, publisher, year, edition, pages
Elsevier Ltd , 2018. Vol. 87, p. 180-189
Keywords [en]
CAD/CAM, Finite element modeling, Fractography, Fracture resistance, Mechanical fatigue, Monolithic zirconia crowns, Thermal fatigue, Acetal resins, Computer aided design, Epoxy resins, Finite element method, Fracture, Fracture mechanics, Fracture toughness, Inverse problems, Zirconia, Cad/cams, Fractographic analysis, Minimal thickness, Monolithic zirconias, Polyoxymethylene, Resin-based composite, Thermal and mechanical cycling, Thermal conductivity, carbene, copolymer, epoxy resin, resin, zirconium oxide, Article, cementation, elasticity, finite element analysis, load to failure test, loading test, mechanical stress, molar tooth, priority journal, tooth fracture
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-236613DOI: 10.1016/j.jmbbm.2018.07.034ISI: 000446286000021Scopus ID: 2-s2.0-85050811130OAI: oai:DiVA.org:kth-236613DiVA, id: diva2:1264108
Note

Export Date: 22 October 2018; Article; Correspondence Address: Nakamura, K.; Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Japan; email: keisuke@m.tohoku.ac.jp; Funding details: 16K11583, JSPS, Japan Society for the Promotion of Science; Funding text: The authors would like to thank 3M/ESPE for generously supplying Lava Zirconia Plus and Lava Ultimate blocks. We are also grateful to Dr. Percy Milleding for useful discussions. This research was supported by JSPS KAKENHI Grant-in-Aid for Scientific Research (C) (Grant 16K11583 ). Appendix A. QC 20181119

Available from: 2018-11-19 Created: 2018-11-19 Last updated: 2018-11-19Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Nilsson, Fritjof

Search in DiVA

By author/editor
Nilsson, Fritjof
By organisation
Polymeric Materials
In the same journal
Journal of The Mechanical Behavior of Biomedical Materials
Chemical Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 104 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf