title: Influence of polymerization mode on degree of conversion and micropush-out bond strength of resin core systems using different adhesive systems.
abstract: The aim of this study was to evaluate the influence of different polymerization modes on degree of conversion and micropush-out bond strength of dual-polymerized resin core systems to dentin by using two different adhesive systems. Two resin core systems, Rebilda DC and Build-It FR, were used in combination with total-etch (Adper Scotchbond Multi-Purpose) and self-etch (Clearfil SE Bond) adhesive systems. After treatment of dentin surfaces, resin core systems were applied into the cavities and subjected to different polymerization modes as follows: (1) chemical polymerization; (2) dual polymerization with standard mode of LED (Elipar FreeLight 2 LED); or (3) dual polymerization with exponential mode of LED. The cavities (n=10 per group) were tested in a universal testing machine. Degree of monomer conversion (DC%) was determined by Fourier transform infrared spectroscopy (n=5 cavities per group). ANOVA revealed that resin core (p = 0.002), adhesive system (p < 0.001), and polymerization mode (p < 0.001) had significant effects on bond strength values. The degree of conversion for resin cores decreased significantly (p < 0.001) when only chemical polymerization was employed.
authors: Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
authors: Isil
authors: I
authors: Cekic-Nagas
authors: Gulfem
authors: G
authors: Ergun
authors: Pekka K
authors: PK
authors: Vallittu
authors: Lippo V J
authors: LV
authors: Lassila
mesh_terms: D000134:Acid Etching, Dental; D000268:Adhesiveness; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000295:instrumentation; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008029:Lighting / Q000295:instrumentation; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011108:Polymers / Q000737:chemistry; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: C483702:Build-it composite resin; C438313:Clearfil SE Bond; D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D011108:Polymers; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C529053:rebilda DC