GC EUROPE Kalore - Manual (Page 34)

34 GC Kalore technical manual
13.0 Summary
KalORe is a state-of-the-art, direct composite resin designed for anterior and posterior direct
restorations. The incorporation of the proprietary monomer DX-511 has enabled optimization of
the physical properties of the composite material.
KalORe offers reduced polymerization shrinkage and polymerization stress. in laboratory testing,
KalORe demonstrated the lowest shrinkage stress of all composites tested. Furthermore, this
innovative direct composite resin possesses excellent handling properties, working time and curing
depth. it also offers high durability, wear resistance and polishability.
KalORe gives the clinician the ability to optimize esthetics for direct composite restorations. the
availability of universal, opaque and translucent shades makes it possible to restore cavities using
either a single- or multi-shade layering technique, while specialized shades are available to
optimize esthetics in cases with increased translucency, shading or bleached enamel.
Direct composite restorations with unrivaled esthetics as well as excellent mechanical and physical
properties are now possible with KalORe.
14.0 Addendum
Influence of the new DuPont monomer (DX-511) on the longevity of GC KALORE.
GC Corporation R&D. May 2009
Introduction
During polymerization of
composite resin, the resin matrix
reduces in volume while the
particles retain their pre-
polymerization volume. this results
in stress at the filler and resin
matrix interface. This stress remains
within the cured composite resin
and can lead to early replacement
of restorations, as particles will be
lost from the matrix. To reduce
polymerization stress at the filler/
matrix interface, lower levels of
polymerization shrinkage are
required.
Recently, a new low shrinkage monomer (DX-511) was licensed from DuPont by GC Corporation.
DX-511 reduces volumetric shrinkage of the resin matrix and, consequently, should minimize both
the generation of stress at the filler/matrix interface and the loss of particles from the resin matrix.
to confirm this hypothesis, composite samples were prepared with (KalORe) and without (KalORe
without DuPont) the low shrinkage monomer. Both materials were formulated with identical fillers,
using the same filler sizes, distribution and treatment (table 1).
table 1. Formulation of KalORe and KalORe without DuPont
monomer Formulation
KalORe KalORe without DuPont
uDma uDma
Dimethacrylate Dimethacrylate
DX-511 (low shrinkage monomer) 70.4 (4.1)
Fillers and Particle Sizes (identical for KALORE & KALORE without
Fluoroaluminosilicate glass (silanated) 700 nm
Strontium glass (silanated) 700 nm
Pre-polymerized filler (surface treated) 17 μm
Silicon dioxide (silanated) 16 nm