PMID: 15348132Sep 7, 2004Paper

The failure of amalgam dental restorations due to cyclic fatigue crack growth

Journal of Materials Science. Materials in Medicine
Dwayne D ArolaM B Sultan

Abstract

In this study a restored mandibular molar with different Class II amalgam preparations was examined to analyze the potential for restoration failure attributed to cyclic fatigue crack growth. A finite element analysis was used to determine the stress distribution along the cavo-surface margin which results from occlusal loading of each restoration. The cyclic crack growth rate of sub-surface flaws located along the dentinal cavo-surface margin were determined utilizing the Paris law. Based on similarities in material properties and lack of fatigue property data for dental biomaterials, the cyclic fatigue crack growth parameters for engineering ceramics were used to approximate the crack growth behavior. It was found that flaws located within the dentine along the buccal and lingual margins can significantly reduce the fatigue life of restored teeth. Sub-surface cracks as short as 25 microm were found capable of promoting tooth fracture well within 25 years from the time of restoration. Furthermore, cracks longer than 100 microm reduced the fatigue life to less than 5 years. Consequently, sub-surface cracks introduced during cavity preparation with conventional dental burrs may serve as a principal source for premature restorati...Continue Reading

Citations

May 19, 2001·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·B KahlerD Stenzel
Oct 18, 2001·Critical Reviews in Oral Biology and Medicine : an Official Publication of the American Association of Oral Biologists·G BaranJ McCool
Apr 2, 2011·Journal of Materials Science. Materials in Medicine·H RyouD Arola
Sep 14, 2007·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·D BajajD Arola
Mar 11, 2016·Analytical Cellular Pathology (Amsterdam)·Rene FranzenNorbert Gutknecht
Jun 2, 2011·Journal of Dental Research·J IvancikD Arola
Jan 23, 2015·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·B MajdD Arola
Feb 12, 2017·Materials Science & Engineering. C, Materials for Biological Applications·Santiago OrregoDwayne Arola
Oct 3, 2018·Materials Science & Engineering. C, Materials for Biological Applications·Mobin YahyazadehfarJirun Sun
Sep 10, 2017·Dental Clinics of North America·Dwayne D ArolaRadi Masri
Dec 13, 2005·Biomaterials·Devendra BajajD Arola
Dec 27, 2005·Dental Materials : Official Publication of the Academy of Dental Materials·Bill KahlerNoune Melkoumian

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