Oxygen Inhibition in Dental Resins
M.A. Gauthier1,
I. Stangel2,
T.H. Ellis1, and
X.X. Zhu1,*
1 Department of Chemistry, Université de Montréal, POB 6128, Downtown Station, Montreal, Quebec, H3C3J7, Canada; and
2 BioMat Sciences, 9700 Great Seneca Hwy. #180, Rockville, MD 20850, USA;
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Figure 1. Effect of curing temperature on the degree of monomer conversion near the surface. (A) Temperature measured during microwave (open circles), visible-light (closed squares), and thermal (closed circles) curing (mean ± SD; n = 4 for each method) of an unfilled 50:50 (mol:mol) Bis-GMA:TEGDMA resin. (B) Degree of conversion as a function of depth for the polymers obtained by the preceding 3 methods (mean ± SD; n = 3 for each group).
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Figure 2. Change in viscosity as a function of temperature associated with the re-activation of oxidized radicals for unfilled monomer mixtures containing 20 to 80 mol% Bis-GMA (mean ± SD; n = 3 for each mixture).
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Figure 3. Viscosity at 25°C measured as a function of shear rate for (A) unfilled monomer mixtures containing 20 to 80 mol% Bis-GMA and (B) filled monomer mixes containing 50 mol% Bis-GMA and 10 to 50 wt% SiO2 (mean ± SD; n = 3 for each mixture).
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Figure 4. Degree of conversion as a function of depth for polymers prepared by photo-polymerizing (A) unfilled polymers containing 20 to 80 mol% Bis-GMA and (B) filled polymers containing 50 mol% Bis-GMA and 0 to 50 wt% SiO2 (mean ± SD; n = 3 for each group).
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