title: Influence of fiber-post translucency on the degree of conversion of a dual-cured resin cement.
abstract: This study evaluated the degree of conversion of one dual-cured resin cement when used to lute fiber posts with different translucencies. To measure the degree of conversion, polyvinylsiloxane molds were prepared to simulate root canals. The posts, Aestheti-Post or Light-Post, were cemented in these molds and, after photoactivation, were removed to obtain the resin cement spectrum by FT-Raman spectroscopy. Spectra were acquired at three depths: superficial, medium, and deep. For Light-Post, the resin cement at deep depth showed the lowest degree of conversion and no significant difference in degree of conversion was found between the other depths. For Aestheti-Post, the superficial depth presented a higher degree of conversion values than those in the medium and deep depths, which were not significantly different from each other. Light-Post exhibited a higher degree of conversion than that of Aestheti-Post only at medium depth. Light-Post effectiveness regarding the degree of conversion is dependent on the depth.
authors.affiliation: Restorative Dentistry Department, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil. andrelfs@fop.unicamp.br
authors.forename: André Luís
authors.initials: AL
authors.lastname: Faria e Silva
authors.forename: Vanessa Gallego
authors.initials: VG
authors.lastname: Arias
authors.forename: Luís Eduardo Silva
authors.initials: LE
authors.lastname: Soares
authors.forename: Airton Abrahão
authors.initials: AA
authors.lastname: Martin
authors.forename: Luís Roberto Marcondes
authors.initials: LR
authors.lastname: Martins
mesh_terms: D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002244:Carbon; D000077482:Carbon Fiber; D003188:Composite Resins; D006244:Hardness; D008027:Light; D008422:Materials Testing; D044367:Phase Transition; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011176:Post and Core Technique; D011791:Quartz; D019279:Resin Cements / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000077482:Carbon Fiber; D003188:Composite Resins; D011109:Polymethacrylic Acids; C462240:RelyX ARC; D019279:Resin Cements; D011791:Quartz; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; D002244:Carbon