Influence of fiber-post translucency on the degree of conversion of a dual-cured resin cement.
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.
Faria e Silva
André Luís
AL
Restorative Dentistry Department, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil. andrelfs@fop.unicamp.br
Arias
Vanessa Gallego
VG
Soares
Luís Eduardo Silva
LE
Martin
Airton Abrahão
AA
Martins
Luís Roberto Marcondes
LR
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
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