Abstract
Background; Composites have been widely used for anterior as well as posterior restorations due to increased aesthetic demands. Composite restorations placed in patients oral cavity is subjected to masticatory load, pH changes and chemical effect due to mouthwashes, beverages, food etc and the detrimental effects associated with these challenges on the microhardness of composite has to be determined. The study was conducted to evaluate the effect of two commercially available non-alcoholic mouth rinses on the microhardness of micro-hybrid and nanohybrid composite resins. Materials and methods: Forty disc-shaped composite specimens were made from each type of composite materials and were divided into 5 groups with 8 samples each, Group 1= Microhybrid+Chlorhex, Group2=Microhybrid + Hexidine, Group3= Nanohybrid + Chlorhex, Group4= Nanohybrid+ Hexidine, Group 5= Nanohybrid and Micro hybrid + artificial saliva(Control).The samples were immersed in mouthrinses for 24 hrs and microhardness was subsequently measured using a Vicker’s microhardness tester. Results: There was no significant difference in microhardness values of tested composite resins in either mouth rinses when compared to composites immersed in artificial saliva. Conclusion: Non-alcoholic mouth rinses do not affect the microhardness of micro-hybrid and nanohybrid composites.
Highlights
Tooth coloured restorations have been widely used in dentistry due to increased aesthetic demands
It is important that the restorative material within the patients oral cavity should be having sufficient physical and mechanical property
The samples were divided in to 5 groups based on the composite material and the type of mouth rinse used for immersion
Summary
Tooth coloured restorations have been widely used in dentistry due to increased aesthetic demands. Different types of tooth coloured restorative materials with varying physical and mechanical properties are available. It has been reported that mouth rinses can affect the physical and mechanical properties of composite, especially because of its pH and alcohol content. Freitas Jr. there has been a surge in research for exploring the potential of different nanomaterials for dental uses.[7] With this concept in mind, nanocomposites with nanosized filler particles have been developed These nanocomposites have higher filler content which results in many advantages such as reduced polymerization shrinkage, improved physical properties, and higher polishability.[8]. There are variety of non-alcoholic mouth rinses available on market and the studies on its effect on micro hardness of composite material is limited. In this study we are evaluating the effect of two commercially available non alcoholic mouth rinses on the micro hardness of composite material
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