Hardness, friction and wear studies on hydrogen peroxide treated bovine teeth

Mundra, Shishir; Mohan, Veena; Gwyer, James D.; Young, N. D.; Franklin, Steven O.; Gerhardt, Lutz-Christian

doi:10.1016/j.triboint.2014.12.024

Cited by 7 publications

(8 citation statements)

References 75 publications

(134 reference statements)

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“…For untreated samples the wear coefficient is of the order of 1x10 -4 mm 3 /Nm, while for treated samples the wear coefficients are all higher than 5x10 -3 mm 3 /Nm. Mundra et al also reported an increase in enamel wear of bovine teeth after bleaching treatment [39]. The increase on wear coefficient is consistent with the decrease of the treated samples hardness and increase of the samples roughness (Table 2), reflecting the enamel structural deterioration due to the treatment.…”

Section: Effect Of the Bleaching Agent Concentration On Enamel Tribolsupporting

confidence: 61%

Effect of bleaching teeth with hydrogen peroxide on the morphology, hydrophilicity, and mechanical and tribological properties of the enamel

Rodrigues¹,

Serro

Polido

et al. 2017

Wear

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The process of tooth whitening is intended to restore the original color of teeth. It consists of the application of oxidizing agents, including hydrogen peroxide. Although these products considerably improve the color of teeth, their effects on other properties of enamel are not fully understood. The purpose of this work was to study the effects of hydrogen peroxide concentration on hydrophilicity, roughness, morphology, mechanical and tribological properties of human tooth enamel. Human teeth were subjected to bleaching sessions containing 6, 15 and 35% hydrogen peroxide in order to achieve a similar level of whitening. The enamel roughness and morphology were characterized by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Vickers microindentation hardness data were obtained. The hydrophilicity was determined using the captive bubble method. Reciprocating, ball-on-flat friction and wear tests were conducted in artificial saliva using zirconia as the ball and polished enamel as the flat specimens. Although all three test solutions improved tooth color, they also changed the properties of the enamel. Morphological and roughness changes were observed, and there was a decrease in hardness and wear resistance. The wettability was nearly unaffected. It was found that the 15% hydrogen peroxide solution damaged the enamel the least. It was concluded that there is an ideal concentration of hydrogen peroxide for whitening treatments.

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Section: Effect Of the Bleaching Agent Concentration On Enamel Tribolsupporting

confidence: 61%

Effect of bleaching teeth with hydrogen peroxide on the morphology, hydrophilicity, and mechanical and tribological properties of the enamel

Rodrigues¹,

Serro

Polido

et al. 2017

Wear

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show abstract

“…In what concerns the evolution of the friction coefficient during time, in teeth bleached, between 100 and 200 s there was a sudden increase of friction coefficient, suggesting a change in friction mechanisms. In other study [15] friction coefficient after treatment was lower but they used a Biotene solution as lubricant.…”

Section: Resultsmentioning

confidence: 95%

“…The results showed a reduction of teeth hardness after bleaching. Hardness reduction have been found in other studies at 6 % or similar concentrations of peroxide [12][13][14][15] due probably to enamel demineralization during the bleaching treatment, as a result of the low pH value and oxidative effect [8]. However, other studies suggest that 6 % peroxide hydrogen doesn't have significant effect in enamel microhardness [14] [16] [17].…”

Section: Resultsmentioning

confidence: 98%

Study of the Impact of the Bleaching with 6 % H2O2 Solution on Teeth Wear

Rodrigues¹,

Serro²,

Figueiredo-Pina

2015

Proceedings of the 8th International Scientific Conference "BALTTRIB 2015"

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This study aims to evaluate the effect of a 6 % hydrogen peroxide (H 2 O 2 ) solution, activated with UV-light, in colour, wear, microhardness and roughness of enamel surface. Five teeth were cut, polished and exposed to black tea solution to confer them a dark color. The specimens were tested before and after bleaching using a spectrophotometer colour equipment, a nanotribometer, a micro durometer and a SEM. On comparing with untreated, the treated enamel surface showed an improvement of colour but a reduction of microhardness and an increase of roughness and wear. A 6 % hydrogen peroxide solution, activated with UV-light, has capacity to induce alterations in enamel surface making it less hard and more susceptible to wear.

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“…Several works were performed in vitro and in situ to analyzing product effects on the tooth structure. Thus, it was found either home whitening therapy or supervised by a dentist, if it is conducted correctly, it does not harm dental tissues and structures, brings satisfactory results 9,10,23,24,25 .…”

mentioning

confidence: 99%

“…The difference between those therapies is related to product concentration and time of use 25 . Regarding the mechanism of action, these systems act on the chromogens within the dentin, thus reducing tooth body color and are often used in conjunction with an activating agent, such as light or heat.…”

mentioning

confidence: 99%

Untitled

2017

IJPSR

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ABSTRACT:The appreciation of appearance is increasingly widespread in the media and involves a smile-related beauty standard. Any change in teeth compromises the appearance and may reflect on the psychological and social behaviour of the human being. Consequently, there has been technological advance in aesthetic and technical restorative materials, such as dental bleaching, as well as the development of more effective drug delivery techniques, such as micro-emulsions and liquid crystals. In this work, dispersed systems containing hydrogen peroxide were developed, characterized and evaluated for dental bleaching agents, with permeation potential in the dentinal tubules in order to optimize the bleaching process. Two pseudo-ternary diagrams were developed. Two formulations of the second diagram were selected and characterized (optical microscopy, pH, particle size, polydispersity index, zeta potential), and then, preliminary and accelerated stability study. In these formulations, the hydrogen peroxide was incorporated in concentrations 6 and 14%. The photomicrographs of the formulations revealed dark field, characteristic of the cubic phases. The product containing 6% hydrogen peroxide obtained pH values of 6.06 ± 0.06; Zeta potential of -6.36 ± 0.6 mV; Droplet size of 9.63 ± 0.01 mV and Polydispersity index of 0.15 ± 0.002. The product containing 14% hydrogen peroxide obtained pH values of 5.93 ± 0.06; Zeta potential of -4.99 ± 0.3 mV; Droplet size of 9.62 ± 0.006 nm and polydispersity index of 0.16 ± 0.007. The rheological profile of the analyzed samples presented with thixotropic behaviour. The results suggest that the nanodisperse systems obtained are liquid crystals of cubic phase.

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Hardness, friction and wear studies on hydrogen peroxide treated bovine teeth

Cited by 7 publications

References 75 publications

Effect of bleaching teeth with hydrogen peroxide on the morphology, hydrophilicity, and mechanical and tribological properties of the enamel

Effect of bleaching teeth with hydrogen peroxide on the morphology, hydrophilicity, and mechanical and tribological properties of the enamel

Study of the Impact of the Bleaching with 6 % H2O2 Solution on Teeth Wear

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