Calibration of a lactic-acid model for simulating biofilm-induced degradation of the dentin-composite interface

Zhu, Lixia; Li, Yuping; Carrera, Carola A.; Chen, Yung Chung; Li, Mingyu; Fok, Alex

doi:10.1016/j.dental.2017.08.186

Cited by 13 publications

(13 citation statements)

References 35 publications

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“…Micro-CT in combination with a radiopaque dye (silver nitrate, AgNO 3 ) was used to assess leakage through the post-dentin margin 31 , 32 . Three freshly prepared disks from each group were painted with an acid-resistant nail varnish, leaving one side of the post and a perimeter of ~0.3-mm wide around it exposed.…”

Section: Methodsmentioning

confidence: 99%

Comparison between two post-dentin bond strength measurement methods

Zhu

Chen

et al. 2018

Sci Rep

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The push-out (PO) test and the diametral compression (DC) test were performed to compare the merits of two post-dentin bond strength measurement methods. Compared with the push-out test, the disk in DC provided post-dentin bond strength measurements that were more precise. The load-displacement curves from the DC test were much smoother and more linear up to the point of fracture when compared to those from the PO test. Compared to the PO test, DC is easier to perform for determining the bond strength between posts and dentin. No specimen alignment is needed in the DC test, and it produces a smaller standard deviation in the measured bond strength. The main disadvantage of the DC test, however, is that finite element analysis (FEA) is required to calculate the bond strength. The shear bond strength given by the PO test based on the simple formula is not valid, though, and the peak failure load is dependent on friction at the post-dentin interface.

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Section: Methodsmentioning

confidence: 99%

Comparison between two post-dentin bond strength measurement methods

Zhu

Chen

et al. 2018

Sci Rep

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“…As mentioned above, lactic acid could reduce the fatigue strength and crack growth resistance of dentin in a way similar to biofilms (Orrego, Xu, and Arola 2017). Zhu et al (2017) demonstrated that, with similar durations and pH levels, lactic acid could produce similar lesion depth, interfacial leakage, and reduced fracture load in model restorations made of bovine root dentin as those produced by biofilms.…”

Section: Chemical Modelsmentioning

confidence: 89%

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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“…e acidifier produced by a local research company is a compound organic acid obtained by direct enzymolysis of feed raw materials and fermentation. Its carrier is the raw material of fermentation feed and has high nutritional value, which is a breakthrough in the preparation of acidifier [12].…”

Section: Compound Acidifiermentioning

confidence: 99%

Chemical Compound Chemical Treatment in Animal Husbandry

Tang¹,

Peng²

2020

Journal of Chemistry

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The acidulant is widely used in the production of animal husbandry, and its use is affected by many factors, including environmental factors, dosage, diet composition, and animal’s own factors, so only the correct use of the acidulant can bring good results in animal production and financial income. This article takes acidifier as an example to study the application of compound chemical treatment in livestock farms. In this paper, the effect of using acidulant in the first 1 to 3 weeks after early weaning of piglets is obvious through this experimental study. The effect gradually decreases after 3 weeks and basically has no effect after 4 weeks. Experimental studies have found that the combination of organic acids, antibiotics, and high copper is the most effective. These three have different functions and have complementary or additive effects. Under harsh feeding conditions, especially when the environmental sanitation and environmental conditions are relatively poor, the effect of acidulants is better than good feeding conditions. Experimental data show that fulvic acid depletes milk’s somatic cells in a short period of time and then quickly activates immune function, which is indicated by the increase in lymphocytes in the blood. When a large number of somatic cells migrate to the breast, the somatic cells in milk will also increase, thereby improving the immunity mediated by human cells. The experimental results show that the BFA formula added 1% to the cattle feed. After the research control of this experiment, the milk output increased by 9–17%, and the quality milk output increased by 19.12%, so the use of acidulant increased feed compensation and reduces gastrointestinal diseases and the reproduction of microorganisms in the rumen of dairy cows.

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Calibration of a lactic-acid model for simulating biofilm-induced degradation of the dentin-composite interface

Cited by 13 publications

References 35 publications

Comparison between two post-dentin bond strength measurement methods

Comparison between two post-dentin bond strength measurement methods

A Review of Mechano-Biochemical Models for Testing Composite Restorations

Chemical Compound Chemical Treatment in Animal Husbandry

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