 his
is the latest high strength glass ionomer
restorative material with a unique formulation
of polyacrylic acid and glass combination
giving it great resistance to dehydration.
Unlike other GIC formulations, the use of
a varnish immediately after placement becomes
unnecessary, and, the set restorative can
be finished under water spray and the Chem-varnish
need not be applied until after polishing
is complete.
The
physical properties of ChemFlex have been
greatly improved including compressive strength
and flexural strength that are significantly
higher than light cured resin reinforced
GIC such as Fuji II LC and Vitremer. The
fluoride release rate is amongst the highest.
 One
of the most impressive aspects of ChemFlex
is its resistance to dehydration. Figure
1 shows clearly that under identical experimental
conditions of dehydration, cracks are clearly
seen on the surface of Ketac Molar and Fiji
IX while the surface of ChemFlex is unblemished.
It is therefore highly resistant to staining
from coffee, tea and red wine.
A
clinical trial in Class V restorations in
permanent teeth at the University of Hong
Kong showed that not only are the restorations
highly acceptable to all patients, significant
benefits reported by patients were reduction
of root sensitivity and much improved gingival
health. Figure 2 A shows the deep Class
V cavities on one of the patients and Figure
2B shows the very satisfactory aesthetics
and function of these restorations.
 ChemFlex
is an ideal restorative for use in the ART
technique. The twelve months' results of
one study at the University of Hong Kong,
done in collaboration with the Hubei Medical
University in Wuhan, PRC showed that ChemFlex
is a highly acceptable product. Figure 3
is the occlusal view of an ART restoration
using ChemFlex in a lower first permanent
molar after 6 months.
|
