uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • 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
Compressive fatigue limit of four types of dental restorative materials
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (materials in medicine)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. (materials in medicine)
Temple Univ, Dept Restorat Dent, Kornberg Sch Dent, Philadelphia, PA 19122 USA.
Temple Univ, Dept Restorat Dent, Kornberg Sch Dent, Philadelphia, PA 19122 USA.
Show others and affiliations
2016 (English)In: Journal of The Mechanical Behavior of Biomedical Materials, ISSN 1751-6161, E-ISSN 1878-0180, Vol. 61, 283-289 p.Article in journal (Refereed) Published
Abstract [en]

The purpose of this study was to evaluate the quasi-static compressive strength and the compressive fatigue limit of four different dental restorative materials, before and after aging in distilled water for 30 days. A conventional glass ionomer cement (Fuji IX GP; IG), a zinc-reinforced glass ionomer cement (Chemfil rock; CF), a light curable resin-reinforced glass ionomer cement (Fuji II LC; LC) and a resin-based composite (Quixfil; QF) were investigated. Cylindrical specimens (4 mm in diameter and 6 mm in height) were prepared according to the manufacturer's instructions. The compressive fatigue limit was obtained using the staircase method. Samples were tested in distilled water at 37 degrees C, at a frequency of 10 Hz with 10(5) cycles set as run-out. 17 fatigue samples were tested for each group. Two-way ANOVA and one-way ANOVA followed by Tukey's post-hoc test were used to analyze the results. Among the four types of materials, the resin-based composite exhibited the highest compressive strength (244 +/- 13.0 MPa) and compressive fatigue limit (134 +/- 7.8 MPa), followed by the light-cured resin reinforced glass ionomer cement (168 +/- 8.5 MPa and 92 +/- 6.6 MPa, respectively) after one day of storage in distilled water. After being stored for 30 days, all specimens showed an increase in compressive strength. Aging showed no effect on the compressive fatigue limit of the resin-based composite and the light-cured resin reinforced glass ionomer cement, however, the conventional glass ionomer cements showed a drastic decrease (37% for IG, 31% for CF) in compressive fatigue limit. In conclusion, in the present study, resin modified GIC and resin-based composite were found to have superior mechanical properties to conventional GIC.

Place, publisher, year, edition, pages
2016. Vol. 61, 283-289 p.
Keyword [en]
Dental restorative materials; Fatigue; Aging; Compressive
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:uu:diva-281942DOI: 10.1016/j.jmbbm.2016.03.031ISI: 000380080400026PubMedID: 27085845OAI: oai:DiVA.org:uu-281942DiVA: diva2:916016
Available from: 2016-03-31 Created: 2016-03-31 Last updated: 2017-11-30Bibliographically approved
In thesis
1. Glass Ionomer Cements with Improved Bioactive and Antibacterial Properties
Open this publication in new window or tab >>Glass Ionomer Cements with Improved Bioactive and Antibacterial Properties
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Dental restorative cements are placed in a harsh oral environment where they are subjected to thermal shock, chemical degradation, and repeating masticatory force. The ideal restorative dental cements should have superior mechanical properties, chemical stability, aesthetic, good handling properties, biocompatibility, antibacterial properties, and preferably bioactivity. This thesis presents research on dental restorative cements with enhanced properties. The overall aim was to increase the bioactivity and antibacterial properties of dental restorative cements without affecting their other properties.

The effect from adding calcium silicate to glass ionomer cement (GIC) was investigated. The results showed that calcium silicate could increase the bioactivity and reduce the cytotoxicity of conventional glass ionomer cement without compromising its setting and mechanical properties.

Hydroxyapatite (HA) with a high aspect ratio and thin nacreous-layered monetite sheets were also synthesized. Nano HA particles with an aspect ratio of 50 can be synthesized by both precipitation and hydrothermal methods. The aspect ratio was controlled via the pH of reaction medium. Thin nacreous-layered monetite sheets were synthesized through a self-assembly process in the presence of an amine based cationic quaternary surfactant. Temperature, pH, and presence of surfactant played essential roles in forming the nacreous-layered monetite sheets. Then the effect from adding silver doped HA and monetite particles was investigated. The results showed that the antibacterial properties of GIC could be increased by incorporating silver doped HA and monetite particles. Further examination showed that the pH change, F- ion release, and concentration of released Ag+ ions were not responsible for the improved antibacterial properties.

The quasi-static strengths and compressive fatigue limits of four types of the most commonly used dental restorations were evaluated. In our study, resin modified GIC and resin-based composite showed superior static compressive strength and fatigue limits compared to conventional GIC. The static compressive strength of dental cements increased with the aging time. However, aging had no effect on the compressive fatigue limit of resin modified GIC and resin-based composite. The compressive fatigue limit of conventional GIC even showed a drastic decrease after aging.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2016. 62 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1413
Keyword
biomaterial, glass ionomer cement, bioactivity, hydroxyapatite, monetite, calcium silicate
National Category
Biomaterials Science
Identifiers
urn:nbn:se:uu:diva-301924 (URN)978-91-554-9670-8 (ISBN)
Public defence
2016-10-14, Å2005, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 09:15 (English)
Opponent
Supervisors
Available from: 2016-09-21 Created: 2016-08-25 Last updated: 2016-09-22

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Authority records BETA

Chen, SongÖhman, CarolineXia, WeiEngqvist, Håkan

Search in DiVA

By author/editor
Chen, SongÖhman, CarolineXia, WeiEngqvist, Håkan
By organisation
Applied Materials Sciences
In the same journal
Journal of The Mechanical Behavior of Biomedical Materials
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 607 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • 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