TY - JOUR
T1 - The effect of curing mode on extent of polymerization and microhardness of dual-cured, self-adhesive resin cements
AU - Cadenaro, Milena
AU - Navarra, Chiara Ottavia
AU - Antoniolli, Francesca
AU - Mazzoni, Annalisa
AU - Di Lenarda, Roberto
AU - Rueggeberg, Frederick Allen
AU - Breschi, Lorenzo
PY - 2010/2/1
Y1 - 2010/2/1
N2 - Purpose: To compare the effect of curing mode (self- or light-cure) on the extent of polymerization (%EP1 as measured using differential scanning calorimetry, (DSC) and microhardness of two dual-cured, self-adhesive resin cements, using a conventional, dual-cured resin cement as control. Methods: Small amounts of the commercial self-adhesive cements Maxcem and RelyX Unicem or Panavia F2.0 dual-cure resin based cement used as control were polymerized within the DSC chamber at 35°C under a nitrogen atmosphere. 10 specimens were light-cured immediately (20 seconds, 600 mW/cm2) and left undisturbed for 2 hours and 10 additional specimens were left to self-cure in the dark for 2 hours. Following DSC treatment, microhardness of the specimens was measured (Vickers). For each test parameter, data were analyzed with a two-way ANOVA and the Tukey post hoc test. Results: %EP and microhardness of all cements were higher when the light-cure mode of dual-activation was used (P< 0.05) instead of only self-curing. No significant difference in %EP was found between either self-adhesive cement or the control using either the light- or self-curing modes. In the light-activated mode, the conventional, dual-cure control cement demonstrated lower microhardness than the self-adhesive cements (P< 0.05).
AB - Purpose: To compare the effect of curing mode (self- or light-cure) on the extent of polymerization (%EP1 as measured using differential scanning calorimetry, (DSC) and microhardness of two dual-cured, self-adhesive resin cements, using a conventional, dual-cured resin cement as control. Methods: Small amounts of the commercial self-adhesive cements Maxcem and RelyX Unicem or Panavia F2.0 dual-cure resin based cement used as control were polymerized within the DSC chamber at 35°C under a nitrogen atmosphere. 10 specimens were light-cured immediately (20 seconds, 600 mW/cm2) and left undisturbed for 2 hours and 10 additional specimens were left to self-cure in the dark for 2 hours. Following DSC treatment, microhardness of the specimens was measured (Vickers). For each test parameter, data were analyzed with a two-way ANOVA and the Tukey post hoc test. Results: %EP and microhardness of all cements were higher when the light-cure mode of dual-activation was used (P< 0.05) instead of only self-curing. No significant difference in %EP was found between either self-adhesive cement or the control using either the light- or self-curing modes. In the light-activated mode, the conventional, dual-cure control cement demonstrated lower microhardness than the self-adhesive cements (P< 0.05).
UR - http://www.scopus.com/inward/record.url?scp=77952474216&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952474216&partnerID=8YFLogxK
M3 - Article
C2 - 20437721
AN - SCOPUS:77952474216
SN - 0894-8275
VL - 23
SP - 14
EP - 18
JO - American journal of dentistry
JF - American journal of dentistry
IS - 1
ER -