GC EUROPE Kalore - Manual (Page 39)

39 GC Kalore technical manual
Combined Polish Retention and Surface Roughness Test Results
the initial surface gloss of KalORe without DuPont was lower than for KalORe, and the surface
roughness was higher. Since the only difference between the two formulations was the amount of
residual stress in the matrix, it was concluded that the inferior properties of KALORE without
DuPont are due to greater stress on the particles with a higher risk of filler loss during the polishing
procedure.
After a 100,000 cycle stress test, the KALORE formulation exhibited a slight reduction in surface
gloss and a slight increase in surface roughness (Ra). It was observed from SEM images that the
pre-polymerized fillers and glass fillers remained tightly adopted in the resin matrix. CLSM images
demonstrated that, while slightly roughened, the surface of the KalORe material remained
smooth.
In contrast, the KALORE without DuPont exhibited an 8% reduction in surface gloss and a 25%
increase in surface roughness under the same test conditions. Furthermore, SEM images
demonstrated that the pre-polymerized fillers and glass fillers were disrupted from the resin matrix
and CLSM images demonstrated a rough surface.
From these results, it can be concluded that the KALORE formulation can be expected to provide
for long-term surface smoothness and surface gloss.
6a. KALORE x5000 after 100,000 cycles.
note the continuous interface between
pre-polymerized fillers and the resin matrix.
6b. KALORE without DuPont x5000 after 100,000 cycles.
Note the voids resulting from the loss of fillers from the resin matrix.
Figure 6. SEM images of KALORE with and wihtout DuPont matrix..