Alternative approaches to evaluating the fatigue characteristics of materials

McCabe, J.F.; Carrick, Thomas E.; Chadwick, R. G.; Walls, Angus

doi:10.1016/0109-5641(90)90040-l

Cited by 106 publications

(149 citation statements)

References 2 publications

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“…Furthermore, this method has been originally developed for the analysis of so-called sensitivity experiments, and assumes that data are normally distributed, while the strength data for brittle materials typically fit the Weibull distribution (Dixon and Mood, 1948). However, there are materials for which the staircase method provides a useful means of determining the fatigue limit (McCabe et al, 1990).…”

Section: Iia) Inorganic Glasses and Ceramicsmentioning

confidence: 99%

Fatigue of Restorative Materials

Baran

Boberick

McCool

2001

Critical Reviews in Oral Biology & Medicine

140

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Failure due to fatigue manifests itself in dental prostheses and restorations as wear, fractured margins, delaminated coatings, and bulk fracture. Mechanisms responsible for fatigue-induced failure depend on material ductility: Brittle materials are susceptible to catastrophic failure, while ductile materials utilize their plasticity to reduce stress concentrations at the crack tip. Because of the expense associated with the replacement of failed restorations, there is a strong desire on the part of basic scientists and clinicians to evaluate the resistance of materials to fatigue in laboratory tests. Test variables include fatigue-loading mode and test environment, such as soaking in water. The outcome variable is typically fracture strength, and these data typically fit the Weibull distribution. Analysis of fatigue data permits predictive inferences to be made concerning the survival of structures fabricated from restorative materials under specified loading conditions. Although many dentalrestorative materials are routinely evaluated, only limited use has been made of fatigue data collected in vitro: Wear of materials and the survival of porcelain restorations has been modeled by both fracture mechanics and probabilistic approaches. A need still exists for a clinical failure database and for the development of valid test methods for the evaluation of composite materials.

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Section: Iia) Inorganic Glasses and Ceramicsmentioning

confidence: 99%

Fatigue of Restorative Materials

Baran

Boberick

McCool

2001

Critical Reviews in Oral Biology & Medicine

140

View full text Add to dashboard Cite

show abstract

“…Early fatigue tests focused almost exclusively on restorative materials such as amalgam and resin composites [49][50][51][52][53] . To determine the feasibility of a complex dental restoration, Huysmans et al 52) employed a fatigue testing machine (load cycling at 5 Hz frequency) to evaluate the mechanical fatigue behavior of premolar teeth restored with a titanium alloy post and an amalgam or composite core.…”

Section: Load Cycling Fatigue Test Of Prg Filler-filled Adhesivesmentioning

confidence: 99%

A Review of Chemical-approach and Ultramorphological Studies on the Development of Fluoride-releasing Dental Adhesives Comprising New Pre-Reacted Glass Ionomer (PRG) Fillers

et al. 2008

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This paper reviews our recent studies on fluoride-releasing adhesives and the related studies in this field based on information from original research papers, reviews, and patent literatures. A revolutionary PRG (pre-reacted glass ionomer) filler technology -where fillers were prepared by the acid-base reaction of a fluoroaluminosilicate glass with polyalkenoic acid in water, was newly developed, and a new category as "Giomer" was introduced into the market. On fluoride release capability, SIMS examination revealed in vitro fluoride ion uptake by dentin substrate from the PRG fillers in dental adhesive. On bonding durability, it was found that the improved durability of resin-dentin bonds might be achieved not only via the strengthened dentin due to fluoride ion uptake from the PRG-Ca fillers, but also due to retention of relatively insoluble 4-AETCa formed around remnant apatite crystallites within the hybrid layer in 4-AET-containing self-etching adhesives. On ultramorphological study of the resin-dentin interface, TEM images of the PRG-Ca fillers revealed that the dehydrated hydrogel was barely distinguishable from normal glass fillers, if not for the concurrent presence of remnant, incompletely reacted glass cores. In conclusion, it was expected that uptake of fluoride ions with cariostatic effect from PRG-Ca fillers would endow dentin substrates with the benefit of secondary caries prevention, together with an effective and durable adhesion to dentin. Key words: Pre-reacted glass ionomer (PRG) technology, Giomer, Fluoride-releasing adhesiveReceived May 30, 2007: Accepted Nov 2, 2007 In 1955, Dr. Michael Buonocore 1) first demonstrated the bonding of acrylic resin to etched enamel. This success has since opened a new vista in the field of adhesive dentistry, and so-called acid-etching technique is ubiquitous in today's dental clinics. The field of adhesive dentistry has made a significant progress over the past decade. A large part of this success is attributed to the major advances in a bonding technology 2) . On dental adhesives, most of the developed products are biologically evaluated by means of in vivo histopathological studies and clinical trial investigations. INTRODUCTIONResults obtained thus far, when measured against stringent clinical demands, point to the need for further research and improvement. The ultimate goal in the design and development of dental adhesives is to render a material that is relatively easy to apply, less technique-sensitive, and which inhibits the formation of secondary caries. To achieve these targets through the development of more advanced adhesives, numerous challenges have been continuously performed by rigorous chemical-approach studies with the aim of tackling research problems and speculations that are regularly encountered in the course of exploration and development. In addition, to understand the mechanism of adhesion to dental hard tissues or its degradation at the resin-dentin interface, numerous ultramorphological studies are undertaken, and made valuable ...

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“…These elements protect the dentin interface against microleakage and recurrent decay, as oral fluids, bacterial enzymes and bacteria cannot penetrate through this natural sealing barrier [17] . Most of the times, it is not necessary to line the base of the cavity prior to condensating F o r P e e r R e v i e w 4 the amalgam, and in large cavities, dentin pins may be required as an alternative form of retention [19] . Additionally, Zn-containing amalgams submitted to mechanical stimuli have contributed to create new crystalline mineral deposits on the partially mineraldepleted subjacent substrate of the caries-affected dentin 14 .…”

Section: Introductionmentioning

confidence: 99%

Ex vivo detection and characterization of remineralized carious dentin, by nanoindentation and single point Raman spectroscopy, after amalgam restoration

Osorio

Aguilera

Cabello

et al. 2016

J Raman Spectroscopy

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The aim of this study was to assess the mechanical and chemical performance of sound and caries-affected dentin (CAD), after Zn-free vs containing amalgam restorations placement and thermocycling. Dentin surfaces were studied by Atomic Force Microscopy (AFM) analysis for surface morphological characterization (including fibril diameter assessment), nano-indentation (to measure nano-hardness-Hi and modulus of Young-Ei), and single point Raman spectroscopy for chemical analysis. Measurements were performed before amalgam placement, after amalgam removal, and after 3 months of thermocycling (100,000cy/5 ºC and 55 ºC). Restorations increased both Hi and Ei at intertubular dentin of CAD. The highest values of Hi were achieved at intertubular dentin after restoring with Zn-containing amalgams. Remineralization of dentin was attributed to the increase of both amorphous and crystalline new mineral, as lower degrees of crystal imperfections in junction with crystal disorders, and improvement in structural stability of collagen were found. Higher presence of minerals were also confirmed after the decrease of fluoridated apatite and the increase of the total water content. Proteoglycans, lipids, and proteins, augmented in both sound and CAD, providing support for the mineral growing. The increase of bands assigned to vibration of carbonate calcium phosphate contributed to a decrease of crystallinity.

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Alternative approaches to evaluating the fatigue characteristics of materials

Cited by 106 publications

References 2 publications

Fatigue of Restorative Materials

Fatigue of Restorative Materials

A Review of Chemical-approach and Ultramorphological Studies on the Development of Fluoride-releasing Dental Adhesives Comprising New Pre-Reacted Glass Ionomer (PRG) Fillers

Ex vivo detection and characterization of remineralized carious dentin, by nanoindentation and single point Raman spectroscopy, after amalgam restoration

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