Instruction Manual

GC Kalore Technical Manual

5.5GCCorporation’sTechnologyforReductionofShrinkage(Stress)

Thenew monomer DX-511, licensedfromDuPontunderan exclusive partnership agreement,is

based on urethane dimethacrylate chemistry and designed to combine excellent handling and

physicalpropertieswithlowshrinkage(stress).DX-511iscompatiblewithallcurrentcompositeand

bonding systems.

DX-511 Monomer

ThemolecularstructureofDX-511includesalongrigidcoreandflexiblereactionarms.Thelong

rigidcoreretainsitsshapeandsizetherebyovercomingthereducedcapacityofflexiblearmsnot

to fold and lose volume, which prevents monomer deformation and reduces shrinkage. The

flexiblearmsincreasereactivity,overcomingthereducedreactivityusuallyassociatedwithlong

monomerchains(Fig.8).ThemolecularweightofDX-511(Mw895)istwicethemolecularweight

ofBis-GMAorUDMA,reducingpolymerizationshrinkagesinceasmallernumberofcarbon

double bonds (C=C) are present.

Filler System

The HDR filler content of 30% wt. is optimized to reduce shrinkage, while still allowing easy

shaping and manipulation of the material.

6.0 Laboratory Testing

Laboratorytestingwasconductedexternallyaswellasin-houseatGCCorporation.Tofirsttestthe

hypothesisthattheadditionoftheDX-511monomerwouldresultinimprovedpropertiesofthe

composite, testing was conducted comparing two sets of composite samples that were identical

exceptthatoneofthetwogroupshadtheadditionofDX-511monomer(KALORE).Specifically,

comparisons were made for shrinkage stress, three-body wear resistance and combined polish

retention/surface roughness. For the results of this testing, which confirmed the superiority of

KALORE containing the DX-511 monomer over the composite without the DX-511 monomer,

pleaserefertothedocumentintheaddendum. Extensivelaboratorytestswerealsoconducted

comparing KALORE with other contemporary composites.

Figure8.DX-511Monomer