The effect of secondary curing of resin composite on the adherence of resin cement.
OBJECTIVE
The aim of this study was to measure the adherence between a resin cement and a resin composite polymerized with and without an additional secondary cure of the resin composite.


METHODS
The resin cement was 3M Opal Luting Composite and the resin composite was Z-100. The resin composite was either polymerized by light only, or given an additional secondary cure at 110 degrees C for 10 min. For each curing mode, the composite was either ground on carborundum paper #1000 or sandblasted with alumina powder. The adherence was determined as bond strength and as bond energy.


RESULTS
Without sandblasting of the resin composite, the heat treatment resulted in reduced adherence both in the bond strength and the bond energy mode of measurement. With sandblasting, only the bond energy was reduced as a consequence of the heat treatment.


CONCLUSIONS
On the basis of the experiments conducted, it may be concluded that secondary cure of resin composites takes place at the expense of the adherence to the resin cement.
Asmussen
E
E
Department of Dental Materials, School of Dentistry, 20 Nörre Alle, DK-2200 Copenhagen N, Denmark. ea@odont.ku.dk
Peutzfeldt
A
A
D000268:Adhesiveness; D000537:Aluminum Oxide; D000704:Analysis of Variance; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003775:Dental Polishing; D006358:Hot Temperature; D006801:Humans; D008027:Light; D008422:Materials Testing; D011108:Polymers / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D012822:Silicon Dioxide; D013223:Statistics as Topic; D013499:Surface Properties; D013997:Time Factors; D015040:Zirconium
C093075:3M Resin Cement; D003188:Composite Resins; D011108:Polymers; D019279:Resin Cements; C083568:Z100 composite resin; D012822:Silicon Dioxide; D015040:Zirconium; D000537:Aluminum Oxide