Effects of polymerization contraction in composite restorations

The influence of "C-factor" and light activation technique on polymerization contraction forces of resin composite

“…These results are in accordance with other authors 4,16,20,23 . However, for groups e and F, with higher C-Factors (1.5), which means larger areas of adhesive surfaces in relation to free surfaces, the contraction values were higher, regardless of the activation technique that was used.…”

The influence of "C-factor" and light activation technique on polymerization contraction forces of resin composite

“…These results are in accordance with other authors 4,16,20,23 . However, for groups e and F, with higher C-Factors (1.5), which means larger areas of adhesive surfaces in relation to free surfaces, the contraction values were higher, regardless of the activation technique that was used.…”

Surface Hardness Properties of Resin-Modified Glass Ionomer Cements and Polyacid-Modified Composite Resins

“…It was noted the curing light generally cures the macrofill and heavy filled hybrids (like Surfil) better than other composites. [21][22][23][24] In the present study it was found there was no statistical difference in the HV values when the test specimens were kept in water storage. Tsuruta and Vohl 25 reported the influence of humidity on hardness of light cured polyalkenoate cements stored in air.…”

Effect of Type of Light Curing Unit on Shear Bond Strength of Resin Composite.

“…A linear relationship between light intensity and degree of conversion (15) and polymerization contraction has been demonstrated (27) . There is a concern that the rapid development of polymerization shrinkage stress, and strain may compromise the formation of an adequate adhesive bond at tooth-composite interface (17) .…”

The influence of "C-factor" and light activation technique on polymerization contraction forces of resin composite

“…These results are in accordance with other authors 4,16,20,23 . However, for groups e and F, with higher C-Factors (1.5), which means larger areas of adhesive surfaces in relation to free surfaces, the contraction values were higher, regardless of the activation technique that was used.…”

Surface Hardness Properties of Resin-Modified Glass Ionomer Cements and Polyacid-Modified Composite Resins

“…It was noted the curing light generally cures the macrofill and heavy filled hybrids (like Surfil) better than other composites. [21][22][23][24] In the present study it was found there was no statistical difference in the HV values when the test specimens were kept in water storage. Tsuruta and Vohl 25 reported the influence of humidity on hardness of light cured polyalkenoate cements stored in air.…”

Effect of Type of Light Curing Unit on Shear Bond Strength of Resin Composite.

“…A linear relationship between light intensity and degree of conversion (15) and polymerization contraction has been demonstrated (27) . There is a concern that the rapid development of polymerization shrinkage stress, and strain may compromise the formation of an adequate adhesive bond at tooth-composite interface (17) .…”

The influence of "C-factor" and light activation technique on polymerization contraction forces of resin composite

“…These results are in accordance with other authors 4,16,20,23 . However, for groups e and F, with higher C-Factors (1.5), which means larger areas of adhesive surfaces in relation to free surfaces, the contraction values were higher, regardless of the activation technique that was used.…”

Surface Hardness Properties of Resin-Modified Glass Ionomer Cements and Polyacid-Modified Composite Resins

“…It was noted the curing light generally cures the macrofill and heavy filled hybrids (like Surfil) better than other composites. [21][22][23][24] In the present study it was found there was no statistical difference in the HV values when the test specimens were kept in water storage. Tsuruta and Vohl 25 reported the influence of humidity on hardness of light cured polyalkenoate cements stored in air.…”

Effect of Type of Light Curing Unit on Shear Bond Strength of Resin Composite.

“…A linear relationship between light intensity and degree of conversion (15) and polymerization contraction has been demonstrated (27) . There is a concern that the rapid development of polymerization shrinkage stress, and strain may compromise the formation of an adequate adhesive bond at tooth-composite interface (17) .…”