Reduction of polymerization contraction stress for dental composites by two-step light-activation.

@article{Lim2002ReductionOP,
  title={Reduction of polymerization contraction stress for dental composites by two-step light-activation.},
  author={B S Lim and Jack Liborio Ferracane and Ronald L Sakaguchi and John R. Condon},
  journal={Dental materials : official publication of the Academy of Dental Materials},
  year={2002},
  volume={18 6},
  pages={436-44}
}
OBJECTIVES The goal of this study was to assess the reduction of polymerization contraction stress of composites during a two-step light-activation process and to relate this reduction to the process of polymerization shrinkage and specimen thickness. METHODS Three test procedures were performed to compare two-step light-activation with delay with one-step continuous irradiation of composites: polymerization contraction stress using a closed-loop servohydraulic testing instrument… CONTINUE READING

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