title: Effect of different beverages on the color stability and degree of conversion of nano and microhybrid composites.
abstract: This study sought to evaluate the effects of different staining solutions on the colour stability of nanocomposites compared with microhybrid resin and to evaluate the degree of conversion of these two materials. Two different shades of two different composites were cured in polytetraflouroethylene disk rings. Coffee, tea and cola drinks were used as staining solutions, and distilled water was used as a control. Data were statistically analysed using a paired T-test with a significance level of 5%. Nano composite showed the highest degree of conversion (DC) values based on calculation of the bonded and free carbonyl peak intensities in the spectrum. The colour analysis showed that nanohybrid had the highest ΔE values when exposed to coffee solutions; they showed less color stability despite having a higher degree of conversion. Nano resin composite showed significantly higher discoloration than microhybrid composite.
authors.affiliation: College of Applied Medical Sciences, Dental Biomaterials Research Chair, Department of Dental Health, King Saud University, Riyadh, Kingdom of Saudi Arabia.
authors.forename: Abdul Aziz Abdullah
authors.initials: AA
authors.lastname: Al Kheraif
authors.forename: Sayed Saad Bin
authors.initials: SS
authors.lastname: Qasim
authors.forename: Ravikumar
authors.initials: R
authors.lastname: Ramakrishnaiah
authors.lastname: Ihtesham ur Rehman
mesh_terms: D001628:Beverages; D002253:Carbonated Beverages; D003069:Coffee; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D053761:Nanocomposites / Q000737:chemistry*; D058105:Polymerization; D013053:Spectrophotometry / Q000295:instrumentation; D013499:Surface Properties; D013662:Tea; D013696:Temperature; D013997:Time Factors; D014867:Water
chemical_list: C425826:Arabesk; D003069:Coffee; D003188:Composite Resins; D003764:Dental Materials; C509998:Grandio; D013662:Tea; D014867:Water