Cure kinetics of composites using video imaging.
OBJECTIVE
To study the rate of curing, three composites, Heliomolar (Vivadent), Z100 (3M), and Renew (Bisco) were investigated


METHODS
Volumetric shrinkage was measured at 25 degrees C using the Acuvol with an RG610 red filter. The dynamic measurements were made in the single view mode.


RESULTS
Detailed kinetic studies for Renew determined the effect of varying the light intensity (100mW - 500mW) and irradiation time (3 seconds - 30 seconds) on the rate of curing. A measurement of the gel time of composites and a kinetic constant is reported. ANOVA followed by a Fisher's LSD test and a Kruskall-Wallis test were used for analysis of the data. The gel times follow the order of Heliomolar > Renew > Z100 at 20 seconds and 500 mW. Irradiation time had no significant effect on the gel time of Renew. Light intensity had a significant effect on the gel time of Renew.
Bisco Inc., 1100 West Irving Park Road, Schaumburg, IL 60193, USA. lsharp@bisco.com
Louis J
LJ
Sharp
Abegail
A
Sy
Yin
Y
Rui
Byoung I
BI
Suh
D000180:Acrylic Resins / Q000737:chemistry / Q000528:radiation effects; D003188:Composite Resins / Q000737:chemistry* / Q000528:radiation effects; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation / Q000379:methods; D007700:Kinetics; D008027:Light; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry / Q000528:radiation effects; D011108:Polymers / Q000737:chemistry / Q000528:radiation effects; D011140:Polyurethanes / Q000737:chemistry / Q000528:radiation effects; D011829:Radiation Dosage; D012822:Silicon Dioxide / Q000737:chemistry / Q000528:radiation effects; D013499:Surface Properties; D013997:Time Factors; D014741:Video Recording / Q000295:instrumentation / Q000379:methods*; D015040:Zirconium / Q000737:chemistry / Q000528:radiation effects
D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; C513708:Heliomolar; D008689:Methacrylates; D011108:Polymers; D011140:Polyurethanes; C485364:Renew composite; C513703:Vivadent; C083568:Z100 composite resin; D012822:Silicon Dioxide; D015040:Zirconium