GC EUROPE Unifil Bond - Manual (Page 4)

GC UniFil Bond Technical manual version 1.10, November 2005, 4/23
• Chemical adhesion is the main mechanism by which glass ionomer cements are
bonded to dentine and enamel surfaces. The carboxyl group (COOH) of
polyalkenoic acids (the liquid component of glass ionomer cement) is ionized by
reaction with powder into carboxylic acid ions (COO
- ). These ions have extremely
strong ionic bonds with calcium ions (Ca 2+ ) in the tooth apatite. The adhesion is
so strong that laboratory testing often shows cohesive failure within the cement
rather than adhesive failure at the interface. Class V retention studies have
shown that long term stability of this adhesion is clinically relevant.
• A combined chemical adhesion / mechanical interlocking can be observed by
using resin reinforced glass ionomers in combination with the appropriate
conditioners . These resin reinforced glass ionomer cements have grown quickly in
popularity as highly successful adhesive materials for crown and bridge
cementation (GC Fuji PLUS), composite lining and bonding (GC Fuji Bond LC) and
for orthodontic bonding of brackets and bands (GC Fuji ORTHO LC).
GC Fuji BOND LC GC Fuji PLUS GC Fuji BOND LC
Interface with dentine Interface with dentine Interface with dentine
GC UniFil Bond represents the result of GC’s application of glass ionomer adhesion
concepts into an advanced, user-friendly, resin bonding system.
Chemical adhesion of glass ionomers to tooth structure
Mechanical retention due to resin tag formation