ArticleMaterials science & engineering. C, Materials for biological applications2017
Degradation in the fatigue crack growth resistance of human dentin by lactic acid.
Article in Materials science & engineering. C, Materials for biological applications, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- 3D-Printed Strong Dental Crown with Multi-Scale Ordered Architecture, High-Precision, and Bioactivity.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Article
- A Review of Mechano-Biochemical Models for Testing Composite Restorations.Journal of dental research · 2021Review
- Investigation of five α-hydroxy acids for enamel and dentin etching: Demineralization depth, resin adhesion and dentin enzymatic activity.Dental materials : official publication of the Academy of Dental Materials · 2019Article
- The Tooth: Its Structure and Properties.Dental clinics of North America · 2017Review
- Fatigue testing of biomaterials and their interfaces.Dental materials : official publication of the Academy of Dental Materials · 2017Article
Corrections and comments
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Authors and funding
3 authors.
Funding
Abstract
The oral cavity frequently undergoes localized changes in chemistry and level of acidity, which threatens the integrity of the restorative material and supporting hard tissue. The focus of this study was to evaluate the changes in fatigue crack growth resistance of dentin and toughening mechanisms caused by lactic acid exposure. Compact tension specimens of human dentin were prepared from unrestored molars and subjected to Mode I opening mode cyclic loads. Fatigue crack growth was achieved in samples from mid- and outer-coronal dentin immersed in either a lactic acid solution or neutral conditions. An additional evaluation of the influence of sealing the lumens by dental adhesive was also conducted. A hybrid analysis combining experimental results and finite element modeling quantified the contribution of the toughening mechanisms for both environments. The fatigue crack growth responses showed that exposure to lactic acid caused a significant reduction (p≤0.05) of the stress intensity threshold for cyclic crack extension, and a significant increase (p≤0.05) in the incremental fatigue crack growth rate for both regions of coronal dentin. Sealing the lumens had negligible influence on the fatigue resistance. The hybrid analysis showed that the acidic solution was most detrimental to the extrinsic toughening mechanisms, and the magnitude of crack closure stresses operating in the crack wake. Exposing dentin to acidic environments contributes to the development of caries, but it also increases the chance of tooth fractures via fatigue-related failure and at lower mastication forces.
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