Abstract
ln recent years a number of porcelain laminate veneer systems have been developed for possible esthetic advantages and minimal tooth reduction as alternatives to metal ceramic restorations. Although these laminate veneers must be bonded to the etched surface of the abutment tooth, luting materials were not discussed sufficiently for the luting operations.This investigation evaluated four light-cured luting materials, CLAPEARL (CP), COSMOTECH (CT), LAMINABOND (LB) and OPTEC (OP), for film thickness, inorganic filler content, filler particle size and viscosity before light curing.
The results obtained were as follows.
1.The film thickness of four light-cured luting materials under 5 kgf load was comparatively smaller than that of glass-ionomer and resin cement.And the film thickness was within 25 pm, and was not effected by applied load and loading time.
2.The inorganic filler contents (wt%) were about 62% for CT, LB, OP, and 69.8% for CP. The filler particle size was within 10 pm, and its shape was irregular.
3.The reduction ratios of viscosities of four light-cured luting materials in the range of 20-40°C were-3.7%/°C for CT, -4.6%/°C for KP, -4.0%/°C for LB, and-3.7%/°C for OP.
