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

Abstract

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.

Flexural strength and microhardness of anterior composites after accelerated aging

“…One of the results of our study was consistent with a finding of Moraes et al (20) who reported that nano-hybrid resins generally demonstrated inferior properties compared with nano-filled composites, and the behavior of nano-hybrid resin composites was more closely related to that of micro-hybrid than nano-filled materials. Da Silva et al (21) examined the microhardness of nanofilled Filtek Z350 XT, microhybrid Filtek Z250, and microfilled Durafill composites and they found values of 118.40, 123.70, and 39.45 KHN for the composites, respectively. The researchers attributed the lowest values of surface hardness Durafill to it having the highest percentage of organic matrix, based on UDMA, and a lower percentage of inorganic filler.…”

Effect of air-polishing on properties of nanocomposite submitted to coffee, red wine and cigarette smoke

“…Overall, the surface quality of the restorative material influences the clinical performance and durability of restorations 5 , since the maintenance of flat surface decreases early alterations of color and shine, besides of reducing the biofilm growth on surface restoration, which decreases risk of secondary caries lesions and periodontal inflammation [4][5][6][7][8][9] . The roughness present on resin surface can be detected by the tip of the patient's tongue since 0.3µm 10 .…”

Effects of different kinds of beers on the surface roughness of glazed and polished methacrylate and Silorane-based composites: a 1-month study

“…Meanwhile, a study (6) on the effects of whisky on composites was evaluated and yielded results parallel to the results of our study. In a study collaborating with our results (22), the effects of alcoholic beverages on surface roughness of different types of composites have compared and beer had found to change the surface roughness the most after following whisky in 1 month. The attributed changes were, likewise in our study, thought to be related with the low pH (4.1) of the related beer.…”

“…Water absorbance of the materials could cause plasticisation of organic matrices and accelerate decomposition. Also, ethanol has directly penetrated through the resin matrix, broken down the polymeric structure (25), separated the bonding between the filler and displaced the filler particles finally resulting in inferior mechanical properties of the composites (22), which could be more important than prolonged immersion in water. The alcohol concentrations of regular and dark beer were nearly the same, 6.6 and 6.5%, respectively.…”