title: Effect of curing protocol on the polymerization of dual-cured resin cements.
abstract: OBJECTIVE
  The purpose of this study was to evaluate how curing protocol affects the extent of polymerization of dual-cured resin cements.
  
  
  METHODS
  Four commercial resin cements were used (DuoLink, Panavia F 2.0, Variolink II and Enforce). The extent of polymerization of the resin cements cured under different conditions was measured using a (1)H Stray-Field MRI method, which also enabled to probe molecular mobility in the kHz frequency range.
  
  
  RESULTS
  Resin cements show well distinct behaviours concerning chemical cure. Immediate photo-activation appears to be the best choice for higher filler loaded resin cements (Panavia F 2.0 and Variolink). A photo-activation delay (5 min) did not induce any significant difference in the extent of polymerization of all cements.
  
  
  CONCLUSIONS
  The extent of polymerization of dual-cured resin cements considerably changed among products under various curing protocols. Clinicians should optimize the materials choice taking into account the curing characteristics of the cements.
authors.affiliation: Centro de Química Estrutural, IST (Instituto Superior Técnico), Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal.
authors.forename: Sónia G
authors.initials: SG
authors.lastname: Pereira
authors.forename: Rogério
authors.initials: R
authors.lastname: Fulgêncio
authors.forename: Teresa G
authors.initials: TG
authors.lastname: Nunes
authors.forename: Manuel
authors.initials: M
authors.lastname: Toledano
authors.forename: Raquel
authors.initials: R
authors.lastname: Osorio
authors.forename: Ricardo Marins
authors.initials: RM
authors.lastname: Carvalho
mesh_terms: D006244:Hardness; D007700:Kinetics; D055115:Light-Curing of Dental Adhesives; D008279:Magnetic Resonance Imaging / Q000379:methods; D015394:Molecular Structure; D044367:Phase Transition; D019279:Resin Cements; D055116:Self-Curing of Dental Resins / Q000379:methods*
chemical_list: D019279:Resin Cements