Abstract
Objective:The aim of this research was to assess the effect of mouth rinses with and without alcohol on the hardness of dental nano-filled composite.Methods:The micro-hardness of fifty circular disk shaped specimens of 7 mm x 2 mm were measured after 14 days. Specimens were immersed into alcohol containing (Listerine and Colgate Perioguard) and alcohol-free (Prodent and Sensodyne Oral antiseptic) mouth rinse solutions. Artificial saliva served as the control. Vickers Micro-hardness was measured with a 30gram load for 30 seconds dwell time by using a diamond indenter. Significant differences were represented by p<0.05, whereas highly significant difference represented by p<0.01. The level of significance (p) was calculated with the help of repeated measure ANOVA. For multiple comparisons, Tukey’s multiple comparison test was used.Results:Statistical analysis revealed highly significant difference between specimens immersed in artificial saliva (control) and Listerine (p<0.01). Whereas significant difference were observed between control and Colgate Periogard (p<0.05). However, no significant difference was observed on comparing Prodent and Sensodyne Oral antiseptic mouth rinses with control group(p>0.05). Control specimens depicted highest value of micro-hardness(60.5746 ± 3.2703) compared to the lowest value seen in specimens immersed in Listerine solvent(54.4687 ± 1.0937).Conclusion:Alcohol containing mouth rinsing solutions have more deleterious effect on hardness of nano composites as compared to alcohol-free mouth rinses.
Highlights
Dental composite is a material of choice for direct restorations.[1,2] The chemical action of organic solvents associated with lack of good mechanical and physical properties which makes it liable to suffer from dissolution and degradation in the oral cavity
No significant differences were observed on comparing Prodent and Sensodyne Oral antiseptic with control
Control specimens demonstrated highest value of micro-hardness, on the other hand specimens immersed in the Listerine solution were found to have the lowest micro-hardness values
Summary
Dental composite is a material of choice for direct restorations.[1,2] The chemical action of organic solvents associated with lack of good mechanical and physical properties which makes it liable to suffer from dissolution and degradation in the oral cavity. This leads to surface roughness and decreased hardness of the material.[1]. Sof-Lex (3M ESPE, USA) and Sof-Lex discs were used to polish specimens to get a clinical finish These fabricated specimens were placed in distilled water for 24 hours for post irradiation hardness.
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