Effects of Protective Resin Coating on the Surface Roughness and Color Stability of Resin-Based Restorative Materials

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Abstract

The aim of this study was to evaluate the effects of nanofilled protective resin coating (RC) on the surface roughness (Ra) and color stability (Δ E) of resin-based restorative materials (RM) (compomer (C), nanofilled composite (NF), and microhybrid composite (MH)) after being submitted to the ultraviolet aging (UV) method. Thirty-six specimens were prepared ( n = 6 for each group). The Ra and (Δ E) values and SEM images were obtained before and after UV. Significant interactions were found among the RM-RC-UV procedures for Ra ( P < 0.001). After the specimens were submitted to UV, the Ra values were significantly increased, regardless of the RC procedure (with RC; P < 0.01 for all, without RC; C ( P < 0.01), NF ( P < 0.001), and MH ( P < 0.001)) for each RM. Significant interactions were found between the RM-RC ( P < 0.001) procedures for the Δ E values. The Δ E values were increased in each group after applying the RC procedures ( P < 0.001). Protective RC usage for RM could result in material-related differences in Ra and Δ E as with used UV method.

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Most cited references 36

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Comparison of the color stability of ten new-generation composites: an in vitro study.

Didier Dietschi, Gaetano Campanile, Jacques Holz … (1994)

The aim of this in vitro study was to evaluate the color stability of modern light-cured composites when subjected to various physico-chemical and staining conditions. Ten brands were evaluated including hybrids, microfine hybrids and microfilled composites. Some universal shade samples underwent only staining tests, while others were subjected to one of the following experimental conditions: thermocycling, postcuring, polishing or a 1 wk immersion in saline, prior to staining. The coloring solutions used for the staining tests were: coffee, E 110 food dye, vinegar and erythrosin. A colorimetric evaluation according to the CIE L*a*b* system was performed after experimental periods of 1 and 3 wk. Erythrosin caused the greatest color change for the composites tested. A reduced susceptibility to staining was observed where surfaces had been polished. Low water sorption, a high filler-resin ratio, reduced particle size and hardness, and an optimal filler-matrix coupling system were related to improved composite resistance to discoloration. Resistance of modern composites to discolorations still depends on their structure and manipulation.

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Influence of different beverages on the microhardness and surface roughness of resin composites.

Vanessa Badra, Juliana FARAONI-ROMANO, Renata Ramos … (2015)

This study assessed the influence of different beverages on the microhardness and surface roughness of microfilled (A110, 3M/ESPE), hybrid (Z250 3M/ESPE) and flowable (Flow, 3M/ESPE) resin composites, over time. Twenty-four disc-shaped specimens (10 mm; 2-mm thick) of each resin composite were fabricated, thereby forming three groups (n=24). Knoop microhardness and surface roughness (Ra) were analyzed at predetermined evaluation periods: 24 hours, and 7, 30 and 60 days after specimens fabrication. The 24-hour measurements were recorded after storage in artificial saliva. Next, each group (n=24) was divided into four subgroups (n=6) according to the test beverages: Coca-Cola, sugar cane spirit, coffee and artificial saliva (control). Control specimens were kept in saliva throughout the experiment (60 days). For experimental specimens, a 60-day testing cycle was carried out: specimens were initially stored in saliva for four hours, then submitted to a five-minute immersion in the beverages (Coca-Cola, sugar cane spirit, coffee) intercalated by immersions in saliva three times daily. Microhardness/roughness measurements were done at 7-, 30- and 60-day intervals. Data were submitted to three-way ANOVA and Scheffée test (p<0.05). It was observed that the tested beverages somewhat altered (p<0.05) the composites' microhardness and/or surface roughness. Knoop microhardness-for all resin composites, microhardness remained stable up to the 30-day record, decreasing significantly at the 60-day evaluation. During the interaction beverage X evaluation period, it was observed that the microhardness of materials immersed in coffee and Coca-Cola remained stable up to the seven-day measurement, showing a decrease at the 30-day record and a more accentuated drop at the 60-day evaluation (p<0.05). Specimens immersed in sugar cane spirit exhibited no significant change in microhardness up to the seven-day measurement, increasing significantly at the 30-day record and later decreasing at the 60-day evaluation. Surface Roughness--For all resin composites, surface roughness increased at the seven-day measurement, while decreasing at the 30-day record and even more at the 60-day record. In the interaction beverage X evaluation period, the surface roughness of specimens immersed in test beverages increased at the seven-day measurement, showing a gradual decrease at the following records (30- and 60-day evaluations). The findings of the reported research disclosed that all beverages altered, to some degree, the microhardness and/or surface roughness of the tested resin composites. The alterations' effects ranged from slightly adverse to a markedly negative impact on the composites' microhardness and surface roughness, depending on the characteristics of the materials, type of beverage and the evaluated period. Generally, the greater number of immersions in beverages resulted in a more accentuated impact on the resins' properties.

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Effect of surface roughness on stain resistance of dental resin composites.

B Roeder, Stephen J. Powers, Huan Lu … (2004)

Surface quality of dental restorations is one of the important factors that determine the success of the restoration. Unfortunately, exterior discoloration is still a problem for dental resin composites. The purpose of the study was to investigate the influential factors on stain resistance of dental resin composites. Filtek Supreme (nanocomposite), Filtek A110 (microfilled composite), Filtek Z250 (microhybrid composite), and Filtek P60 (microhybrid composite) (all products from 3M ESPE, St. Paul, MN, USA) were tested. Thirty-six specimens per material were prepared and randomly assigned to 6 groups. The specimens in 5 groups were polished against 1,000-, 1,200-, 1,500-, 2,000-, and 2,500-grit sandpaper, respectively. The specimens in a sixth group were polished with 2,500-grit or 1,200-grit sandpaper and used as controls. Surface roughness (Ra) and gloss of the specimens were measured with a profilometer and a glossmeter, respectively. Specimens were immersed in a coffee solution (control group in distilled water) and kept in a 37 degrees C incubator. Color was measured by a spectrophotometer at baseline, 3 days, 7 days, and 14 days, and color change (DeltaE*(ab)) was calculated. Coffee, material, Ra, and the interaction of material x Ra had statistically significant influences on the stain resistance of the dental composites tested. For most materials in coffee solution, time squared and Ra had significant effects on the discoloration. Coffee had a significant influence on discoloration of the dental resin composite materials tested. The different composites behaved differently in coffee solution. Discoloration increased as Ra increased for the composites tested, except with Filtek A110. The discoloration process was accelerated with time.

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Author and article information

Journal

Journal ID (nlm-ta): ScientificWorldJournal

Journal ID (iso-abbrev): ScientificWorldJournal

Journal ID (publisher-id): TSWJ

Title: The Scientific World Journal

Publisher: Hindawi Publishing Corporation

ISSN (Print): 2356-6140

ISSN (Electronic): 1537-744X

Publication date (Print): 2014

Publication date (Electronic): 5 August 2014

Volume: 2014

Electronic Location Identifier: 832947

Affiliations

¹Department of Prosthodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey

²Department of Pediatric Dentistry, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey

³Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey

⁴Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, Ankara, Turkey

Author notes

*Bora Bagis: bbagis@ 123456yahoo.com

Academic Editor: Cornelis H. Pameijer

Author information

Bora Bagis http://orcid.org/0000-0003-1974-9719

Sedanur Turgut http://orcid.org/0000-0003-2534-9279

Article

DOI: 10.1155/2014/832947

PMC ID: 4139090

PubMed ID: 25162066

SO-VID: e9666e57-5b53-47e8-b367-0366ec7879e3

License:

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Effects of Protective Resin Coating on the Surface Roughness and Color Stability of Resin-Based Restorative Materials

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Most cited references 36

Comparison of the color stability of ten new-generation composites: an in vitro study.

Influence of different beverages on the microhardness and surface roughness of resin composites.

Effect of surface roughness on stain resistance of dental resin composites.

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