A comparison of fatigue crack growth in resin composite, dentin and the interface

The design of clinical trials allows for limited insights into the fatigue processes occurring in resin composites and the factors involved therein. In vitro studies, in contrast, can fundamentally narrow study interests to focus on particular degradation mechanisms and, to date, represent the major contributors to the state of knowledge on the subject. These studies show that microstructural features are important in determining strength and fracture toughness, whereas fatigue resistance is mainly related to the susceptibility of the matrix and the filler/matrix interface to mechanical and chemical degradation. In this review, we focus on fracture mechanisms occurring during fatigue, on the methods used to assess them, and on additional phenomena involved in the degradation of initial mechanical properties of resin composites.

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“…Soappman et al (2007) found a similar value for n (5.3 m/cycle) for another microhybrid composite (Vit-l-escence, Ultradent, Logan, UT, USA).…”

supporting

confidence: 51%

Factors Involved in Mechanical Fatigue Degradation of Dental Resin Composites

2013

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“…This was reflected by the significant decline in TBS after the adoption of these two sealer removal protocols. Although the microtensile testing is quasi-static in nature, the results suggest the possibility of a lower resistance to fatigue crack growth during cyclic stresses or functional loading (31). This may lead to an accentuated breach of the coronal seal that allows ingress of fluid, endotoxins, and bacteria through the root filling into the periradicular regions.…”

Section: Discussionmentioning

confidence: 78%

The Efficacy of Different Sealer Removal Protocols on Bonding of Self-etching Adhesives to AH Plus–contaminated Dentin

Roberts

Kim

et al. 2009

Journal of Endodontics

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“…Many of the specimens failed due to fatigue along the interface between the resin composite and dentin. These failures appeared to have occurred due to voids in the adhesive resin [42] and were minimized through careful control of the methods of preparation (i.e., etching time, moisture, adhesive thickness and curing time). Overall, fatigue crack growth rates obtained with the dentin inset specimens ranged from 2.0E-6 to approximately 5.0E-3 mm/cycle, which are consistent with those obtained in previous investigations using the standard CT specimen [11].…”

Section: Discussionmentioning

confidence: 99%

Methods for Examining the Fatigue and Fracture Behavior of Hard Tissues

et al. 2007

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An understanding of the fatigue and fracture behavior of hard tissues (e.g., bone and tissues of the human tooth) is critical to the maintenance of physical and oral health. Recent studies suggest that there are a number of mechanisms contributing to crack extension and crack arrest in these materials, and that they appear to be a function of moisture and age of the tissue. An understanding of these processes can provide new ideas that are relevant to the design of multi-functional engineering materials. As a result, we have adopted the use of microscopic Digital Image Correlation (DIC) to examine the mechanisms of crack growth resistance and near-tip displacement distribution for cracks in human dentin that are subjected to opening mode loads. We have also developed a special compact tension (CT) specimen that permits evaluation of crack extension within small portions of tissue under both quasi-static and fatigue loads. The specimen embodies a selected portion of hard tissue within a resin composite restorative and enables an examination of diseased tissue, or portion with specific physiology, that would otherwise be impossible to evaluate. In this paper we describe application of these experimental methods and present some recent results concerning fatigue crack growth and stable crack extension in dentin and across the dentinenamel-junction (DEJ) of human teeth.

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A comparison of fatigue crack growth in resin composite, dentin and the interface

Cited by 44 publications

References 21 publications

Factors Involved in Mechanical Fatigue Degradation of Dental Resin Composites

Factors Involved in Mechanical Fatigue Degradation of Dental Resin Composites

The Efficacy of Different Sealer Removal Protocols on Bonding of Self-etching Adhesives to AH Plus–contaminated Dentin

Methods for Examining the Fatigue and Fracture Behavior of Hard Tissues

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