Degradation in the fatigue crack growth resistance of human dentin by lactic acid

Orrego, Santiago; Xu, Huakun; Arola, D.

doi:10.1016/j.msec.2016.12.065

Cited by 11 publications

(7 citation statements)

References 61 publications

(95 reference statements)

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“…The influence of lactic acid exposure on the fatigue crack growth resistance was also recently evaluated by Orrego et al [89]. A comparison of the fatigue crack growth responses of mid-coronal dentin exposed to neutral and lactic acid conditions (pH=5) is shown in Fig.…”

Section: Oral Environmentmentioning

confidence: 80%

The Tooth

Arola

Gao

Hai

et al. 2017

Dental Clinics of North America

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Synopsis This article provides a brief review of recent investigations concerning the structure and properties of the tooth. The last decade has brought a greater emphasis on the “durability” of the tooth, an improved understanding of the fatigue and fracture behavior of the principal tissues and their importance to tooth failures. The primary contributions to tooth durability are discussed, including the process of placing a restoration, the impact of aging, and challenges posed by the oral environment. The significance of these findings to the dental community, and their importance to the pursuit of lifelong oral health are highlighted.

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Section: Oral Environmentmentioning

confidence: 80%

The Tooth

Arola

Gao

Hai

et al. 2017

Dental Clinics of North America

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“…Kaneshiro et al (2008) used acetate buffer to test the acid resistance of resin coating systems on human root dentin. Orrego, Xu, and Arola (2017) showed that the fatigue strength and crack growth resistance of dentin were greatly reduced by lactic acid. Using a concurrent chemo-mechanical model with lactic acid to test model restorations made of bovine incisors, Kuper et al (2013) reported that the mechanical load and subsequent interfacial failure enhanced the development of secondary caries.…”

Section: Chemical Modelsmentioning

confidence: 99%

A Review of Mechano-Biochemical Models for Testing Composite Restorations

Ning

Aregawi

et al. 2021

J Dent Res

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Due to the severe mechano-biochemical conditions in the oral cavity, many dental restorations will degrade and eventually fail. For teeth restored with resin composite, the major modes of failure are secondary caries and fracture of the tooth or restoration. While clinical studies can answer some of the more practical questions, such as the rate of failure, fundamental understanding on the failure mechanism can be obtained from laboratory studies using simplified models more effectively. Reviewed in this article are the 4 main types of models used to study the degradation of resin–composite restorations, namely, animal, human in vivo or in situ, in vitro biofilm, and in vitro chemical models. The characteristics, advantages, and disadvantages of these models are discussed and compared. The tooth–restoration interface is widely considered the weakest link in a resin composite restoration. To account for the different types of degradation that can occur (i.e., demineralization, resin hydrolysis, and collagen degradation), enzymes such as esterase and collagenase found in the oral environment are used, in addition to acids, to form biochemical models to test resin–composite restorations in conjunction with mechanical loading. Furthermore, laboratory tests are usually performed in an accelerated manner to save time. It is argued that, for an accelerated multicomponent model to be representative and predictive in terms of both the mode and the speed of degradation, the individual components must be synchronized in their rates of action and be calibrated with clinical data. The process of calibrating the in vitro models against clinical data is briefly described. To achieve representative and predictive in vitro models, more comparative studies of in vivo and in vitro models are required to calibrate the laboratory studies.

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“…The etching pattern associated with the low water content of PA-treated enamel favors resin penetration resulting in stable adhesion [3,4]. On the contrary, the high water (~20%v) and organic content (~30%v) [5,6] accompanying by increased tissue permeability, present an immediate challenge for the infiltration and polymerization of dental resins and the long-term stability of the dentin-resin bonds.…”

Section: Introductionmentioning

confidence: 99%

Investigation of five α-hydroxy acids for enamel and dentin etching: Demineralization depth, resin adhesion and dentin enzymatic activity

et al. 2019

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Objectives: Surface conditioning of enamel and dentin is a key step during adhesive restorative procedures and strategies. The aim of this study was to investigate the effectiveness of five αhydroxy-acids (AHAs) as enamel and dentin surface etchants. Methods: Enamel and dentin specimens were prepared from human molars to determine the depth of demineralization by optical profilometry (Δz), the resin bond strength to enamel and dentin (μTBS), the micro-permeability of dentin-resin interfaces, and the gelatinolytic activity of dentin matrix induced by AHAs [glycolic (GA), lactic (LA), citric (CA), malic (MI) and tartaric (TA)] and controls [phosphoric (PA) and maleic (MA)]. All acids were prepared at 35% concentration. Adhesion studies employed Adper Single Bond Plus bonding system. Data were individually processed and analyzed by ANOVA, post-hoc tests and Pearson correlations (α=0.05). Results: AHA exhibited statistically lower depth of demineralization of enamel and dentin (average 4 fold) than controls (p<0.001). In enamel, MA and PA etching resulted in higher μTBS than AHA groups (p˂0.001). In dentin, GA, TA, CI and LA etching resulted in statistically similar μTBS than PA (p<0.05). The hybrid-layer (HL) thickness and interfacial micro-permeability intensity were statistically lower for AHA groups (p<0.05). A significant positive correlation was observed between the intensity of micro-permeability and the thickness of HL (p<0.05). AHA etchants elicited lower dentin enzymatic activity than controls (p<0.05).

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Degradation in the fatigue crack growth resistance of human dentin by lactic acid

Cited by 11 publications

References 61 publications

The Tooth

The Tooth

A Review of Mechano-Biochemical Models for Testing Composite Restorations

Investigation of five α-hydroxy acids for enamel and dentin etching: Demineralization depth, resin adhesion and dentin enzymatic activity

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