Abstract
ABSTRACTAimsThe aim of the present study is to evaluate the effect of cavity disinfection with 2% chlorhexidine (CHX) and Ag-Au nanoparticles on microleakage and resin tag penetrability of composite restoration under in vitro conditions.Materials and methodsTwenty-five human permanent molars extracted for therapeutic reasons were used in the study. Class V cavity of standard dimension was prepared on the buccal and lingual surfaces of the teeth. The teeth were randomly allocated into two groups based on the cavity disinfectant used; group I being 2% chlorhexidine gluconate (chlorhexidine FGM) and group II being cavity disinfectant containing Ag-Au nanoparticles (nanocare gold). In both the groups, the dentin was etched with 37% phosphoric acid and cavity disinfectants were applied following which dentine bonding agent and composite resin were applied and cured. The specimens were then viewed under stereomicroscope and scanning electron microscope for evaluation of microleakage and resin tag formation, respectively.ResultsThe results were statistically analyzed using independent ‘t’ test. No significant difference was seen between the two groups with respect to the microleakage and resin tag penetration values (p >0.05).ConclusionCavity disinfectant containing Ag-Au nanoparticles had no effect on the sealing ability and resin tag penetrability of composite resin in permanent molars when compared with 2% CHX.Clinical significanceUse of Cavity disinfectant containing Ag-Au nanoparticles with etch and rinse system can be preferred as it satisfies the ideal property of a cavity disinfectant which includes excellent antimicrobial action and non-detrimental effect on the sealing ability and resin tag penetrability.How to cite this articleRamasetty PA, Tripathi AP, Sugandhan S, Naik SV, Deepak BM. Nanotechnology in Dentin Disinfection: Can We Preserve the Bond? Int J Clin Pediatr Dent, 2018;11(6):468-473
Highlights
IntroductionIt is estimated that the replacement of an existing restoration accounts for 50–71% of each general dentist’s activities.[1] In most of the clinical situations, replacement of the restorations has been highly associated with the occurrence of secondary caries
Worldwide, it is estimated that the replacement of an existing restoration accounts for 50–71% of each general dentist’s activities.[1]
No significant difference was seen between the two groups with respect to the microleakage and resin tag penetration values (p >0.05)
Summary
It is estimated that the replacement of an existing restoration accounts for 50–71% of each general dentist’s activities.[1] In most of the clinical situations, replacement of the restorations has been highly associated with the occurrence of secondary caries. It may be caused by residual bacteria left under the restoration, or by development of a microscopic pathway for leakage past the composite restoration due to polymerization shrinkage which may lead to degradation of bond, increased pulp sensitivity and pulpal inflammation.[2] to reduce the development of secondary caries use of cavity disinfectant has gained a wider acceptance. Few studies have shown that previous dentin treatment using chlorhexidine impaired the adhesion.[5,6] In addition to the above mentioned adverse effect on adhesion, over the years, the antimicrobial property of CHX has been questioned through various studies.[7,8]
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