Influence of pH environment on polymer based dental material properties

Prakki, Anuradha; Cilli, Renato; Mondelli, R.; Kalachandra, S.; Pereira, José Carlos

doi:10.1016/j.jdent.2004.08.004

Cited by 101 publications

(119 citation statements)

References 24 publications

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“…The effects of such factors in restorative materials are softening, surface roughness increases, and tooth erosion, making them more susceptible to wear 8,9) . Even with the technological development and the significant improvement in physical and mechanical properties of the dental composites, the material degradation is still a problem 10) . The increased consumption of alcoholic beverages has raised questions about these drinks' erosive potential on the dental hard tissues and clinical performance of restorative materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of alcoholic beverages on surface roughness and microhardness of dental composites

Silva

Vitti

Sinhoreti

et al. 2016

Dental Materials Journal

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The aim of this study was to evaluate the microhardness and surface roughness of composite resins immersed in alcoholic beverages. Three composite resins were used: Durafill (Heraeus Kulzer), Z250 (3M-ESPE) and Z350 XT (3M-ESPE). The inital surface roughness and microhardness were measured. The samples were divided into four groups (n=30): G1-artificial saliva; G2-beer; G3-vodka; G4-whisky. The samples were immersed in the beverages 3× a day for 15 min and 30 days. The surface roughness and microhardness assays were repeated after immersion period. The data were statistically analyzed by two-way ANOVA and Tukey-HSD test (p<0.05). Surface roughness increased for all composite resins immersed in beer and whisky. Microhardness of all groups decreased after immersion in alcoholic beverages. The effect of these beverages on dental composites is depended upon the chemical composition, immersion time, alcohol content and pH of solutions.

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Section: Introductionmentioning

confidence: 99%

Effect of alcoholic beverages on surface roughness and microhardness of dental composites

Silva

Vitti

Sinhoreti

et al. 2016

Dental Materials Journal

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“…Moreover, the results point out that the polymer degradation was material, media storage and time dependent because the velocity of the polymer degradation was influenced by pH or storage media, by type of chemical bond within the polymer backbone, copolymer composition, water up take and by storage time as suggested by some author [9,10].…”

Section: Discussionmentioning

confidence: 83%

“…These mechanisms may result in a reduction of the physical-mechanical properties of restorative materials [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Surface Degradation of Resin-based Materials by Pediatric Syrup Containing Amoxicillin under Erosive Challenge

Santos

Patrocínio

Fidalgo

et al. 2017

Pesqui. bras. odontopediatria clín. integr.

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Objective: To investigate the effect of a pediatric syrup containing Amoxicillin on resin-based on the surfaces of resin-based materials under pH cycling. Material and Methods: Cylindrical samples (n=60) of a compomer (Freedom) and a microhybrid composite (TPH Spectrum) were prepared following the manufacturer's instructions. The specimens were divided into two groups and treated for 30min, twice a day, for 14 days with a pediatric syrup containing Amoxicillin, Amoxil™ 500mg/5ml (experimental group) or Distilled water (control group). During the 14 days, the samples were submitted to pH cycling (3h in demineralizing, 20h in remineralizing saliva, and 1h for treatment). The surface roughness was evaluated at baseline, on the 7 th and 14 th days of erosive challenge using a profilometer and illustrated by SEM. The data were statistically analyzed by one-way ANOVA, Tukey HSD and paired T-tests (p < 0.05). At baseline, the mean Ra TPH = mean Ra F (p > 0.05). Results: After 7 days, it was observed no erosion (p = 0.674) for THP Spectrum (0.19 Ra) and an increasing of Ra (p = 0.02) for Freedom (19.95 Ra). After 14 days, it was observed an increasing of Ra for both THP Spectrum (0.56 Ra) and for Freedom (3.44 Ra), demonstrating that the degradation was treatment and time-dependent (p < 0.001). The pediatric syrup containing Amoxicillin increased the surface roughness of the TPH Spectrum surface one and a half times (p = 0.003) and the surface roughness of Freedom was increased by more than two times (p < 0.001). SEM images showed different aspects of the surfaces of the two materials with a loss of integrity to both. Conclusion: The pediatric syrup containing Amoxicillin under pH cycling increased the roughness of the both tested resin-based restorative materials.

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“…Chemical degradation can occur if resin composite absorbs water and other colorants because water is an excellent solvent and cheap availability in nature. Clinically, this can lead to a loss of restoration contour, as well as an increase in surface roughness and discoloration [7][8] [9][10] [11].…”

Section: Discussionmentioning

confidence: 99%