World Journal of Dentistry

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VOLUME 10 , ISSUE 1 ( January-February, 2019 ) > List of Articles


Beverage Influence on Direct Restorations

Ali AR Al-Shekhli, Isra'a AA Aubi

Keywords : Beverages, Compomer, Composite, Microhardness and soft drinks

Citation Information : Al-Shekhli AA, Aubi IA. Beverage Influence on Direct Restorations. World J Dent 2019; 10 (1):52-57.

DOI: 10.5005/jp-journals-10015-1602

License: CC BY-NC 4.0

Published Online: 01-02-2019

Copyright Statement:  Copyright © 2019; The Author(s).


Aim: The aim of this study was to evaluate and compare the beverages effect on the microhardness of composite and compomer direct restorative materials in comparison with mineral water. Materials and methods: Two types of direct restorative materials of A3 shade were selected for this study: Composan Bio-esthetic Nano-ceram Composite (PROMEDICA) and Composan compomer (PROMEDICA). Forty specimens were prepared from each restorative material (total number of specimens were 80). Each specimen was prepared by compressing a sufficient amount of material into a mold of 4 mm in diameter and 2 mm in thickness by two glass slides with acetate celluloid strip in between and curing the specimen for 20 seconds from only the top surface by making the curing tip in intimate contact with the acetate celluloid strips covering the composite and compomer surface with LED Woodpacker light curing unit. The top and bottom surfaces were divided into two halves: 1st half was subjected to microhardness testing before immersion, while microhardness testing was performed on the 2nd half after immersion in beverages. PH values were recorded for each beverage solution with pH meter (Mettler Toledo, Canada). Vickers microhardness testing was performed with a microhardness tester (Microhardness tester FM-800, Future-Tech, Japan) at 300 g load and 15 seconds according to ISO 4049 for both top and bottom surfaces by making three indentations and considering the mean micro-hardness value for each surface to be the Vickers hardness number for that surface. Three types of beverages were used in the study (Coca Cola, orange juice, Red Bull) and a fourth immersion solution of mineral water was used as a control group. The 80 specimens were immersed for 30 days at 37°C. The immersion solutions were replaced in a daily manner. After immersion, the composite and compomer specimens were incubated in distilled water at 37°C for 24 hours before the microhardness testing.   Data were statistically analyzed before and after immersion of the 80 specimens using mean, standard deviation, one way ANOVA and t-test at a 5% level of significance. Results: One-way analysis of variance (ANOVA) for VHN composite top, bottom, and compomer top, bottom revealed that there was a statistically significant difference (p ≤ 0.05). t-tests comparing all the groups before and after immersion showed that there were statistically significant differences (p ≤ 0.05) in all groups being tested in this study. pH values for all the solutions were recorded as the followings: pH for Cola was 1.87, orange juice was 2.63, Red Bull was 2.55 and for water was 6.96. Conclusion: (a) All the beverages being tested including mineral water groups significantly resulted in general microhardness reduction; (b) Compomers tops and bottoms displayed a significantly general lower hardness values than composite restorative materials before and after immersion; (c) Composites showed higher differences in microhardness values than compomers in all the beverages when microhardness values were being compared before and after immersion; (d) Water sorption was the major factor affecting the microhardness rather than the acidic component of the different beverages used in the study; (e) Orange juice was significantly the highest beverage in microhardness reduction of both restorative materials. Clinical significance: Beverages contain chemical components and their acidic nature or water content might affect the hardness of direct restorative materials that might lead to the degradation at the matrix/filler interface by acid attack and consequently a negative effect on the general performance of the affected restoration in oral service.

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