Human enamel nanohardness, elastic modulus and surface integrity after beverage contact

Machado, Camilo; Lacefield, William R.; Catledge, Aaron S.

doi:10.1590/s0103-64402008000100012

Cited by 32 publications

(25 citation statements)

References 13 publications

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“…The surface roughness of both the enamel and cementum also increased with time following exposure to the test solutions. The increase in surface roughness of enamel was in accordance with the study conducted by Machado et al (14). On clinical examination we found that at the end of ten days the enamel showed a softened opaque surface similar to the study reported by Fujji et al wherein the enamel surfaces placed in coca-cola and orange juice were visibly roughened and had lost their lustre (9).…”

Section: Discussionsupporting

confidence: 91%

A time based objective evaluation of the erosive effects of various beverages on enamel and cementum of deciduous and permanent teeth

2020

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Background: Erosion of the teeth is a chronic irreversible process leading to loss of surface enamel and even the dentin, in turn causing sensitivity and pain. Increased consumption of carbonated beverages remains a major cause for dental erosion. However, many of the so called safe beverages that are consumed may also have sufficiently low pH to cause dental erosion. One of the parameters to measure the dental erosion is estimation of hardness and surface roughness. Thus, this study aims to evaluate the difference in hardness and surface roughness of enamel and cementum using three beverages namely (carbonated drink, lime soda, lime juice) in deciduous and permanent teeth. Material and Methods: Ten permanent and three deciduous teeth samples each were kept in lime juice, lime soda, carbonated beverage and tap water. The VHN using Vickers hardness tester and Ra value using surface profilometer were assessed at baseline, 1 day and 10 days. Results: At the end of 10 days the decrease in hardness of enamel of permanent teeth was maximum for teeth immersed in carbonated beverage followed by lime soda and lime juice. However, in the deciduous teeth it was observed that the VHN drop was maximum at 1 day in relation to teeth immersed in carbonated beverage followed by lime juice and lime soda. The hardness of cementum decreased significantly at the end of ten days both in deciduous as well as permanent teeth. Conclusions: The present study shows that many of the most commonly used beverages like lime juice and lime soda have a sufficiently low pH to cause erosion of the enamel surface as well as that of cementum of both deciduous and permanent teeth. Though protective mechanisms do exist in the oral cavity to neutralize the acids present in these beverages, continuous usage of these beverages leads to irreversible damage to the tooth structure.

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Section: Discussionsupporting

confidence: 91%

A time based objective evaluation of the erosive effects of various beverages on enamel and cementum of deciduous and permanent teeth

2020

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“…However, one should bear in mind that such result may not hold for other methods used to measure erosion. In fact, in terms of wear, evidence exists that bovine dentin can be considered an acceptable substitute for human counterparts (15), at least from an in vitro study which though may not reflect the clinical reality (20).…”

Section: Discussionmentioning

confidence: 99%

Viability of using enamel and dentin from bovine origin as a substitute for human counterparts in an intraoral erosion model

et al. 2010

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This study ascertained whether under dental erosion models that closely mimics the real-life situation enamel and root dentin from bovine origin would be reliable substitutes for human counterparts. Through a 2x2 crossover design, in a first trial, 14 volunteers wore a palatal device containing slabs of bovine and human enamel. Half of the participants ingested (4x daily, for 10 days) orange juice first, crossing over to mineral water, while the remainder received the reverse sequence. In a second trial, volunteers wore devices with slabs of bovine and human root dentin. Except for the duration of each intraoral phase, which lasted 2 rather 10 days, the experiment with root dentin run exactly as for enamel. Dental substrates were analyzed for surface microhardness. Two-way ANOVAs (α=0.05) indicated no difference between the microhardness values recorded for human and bovine enamel (p=0.1350), but bovine root dentin had lower microhardness compared to its human counterpart (p=0.0432). While bovine enamel can reliably substitute its human counterpart in in situ dental erosion models, bovine root dentin does not seem to be a viable alternative to the corresponding human tissue.

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“…36,37 The nanoindenter is capable of applying loads of just few mNs while simultaneously measuring displacement changes <1 nm, hence accounting for both plastic and elastic deformation, as well as time dependent effects. [36][37][38][39][40][41] Bao et al 42 and Oyen 43 investigated, using nanoindentation, the relationship between 3 parameters, namely, elastic modulus, hardness, and recovery resistance for solids and mineralized tissues. It was found that an inherent relationship existed where the capacity of local energy dissipation or plasticity of a material could also be evaluated, and concluded that any one of the three parameters could be predicted if the other two were known.…”

Section: Introductionmentioning

confidence: 99%

Effect of home bleaching systems on enamel nanohardness and elastic modulus

Azer

Machado

Sánchez

et al. 2009

Journal of Dentistry

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Human enamel nanohardness, elastic modulus and surface integrity after beverage contact

Cited by 32 publications

References 13 publications

A time based objective evaluation of the erosive effects of various beverages on enamel and cementum of deciduous and permanent teeth

A time based objective evaluation of the erosive effects of various beverages on enamel and cementum of deciduous and permanent teeth

Viability of using enamel and dentin from bovine origin as a substitute for human counterparts in an intraoral erosion model

Effect of home bleaching systems on enamel nanohardness and elastic modulus

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