Bonding to zirconia elucidating the confusion
One hundred thirty composite cement cylinders, comprising two dual-polymerizing (Variolink II and Panavia F) and two autopolymerizing (Rely X and Multilink) resins were bonded to the ceramic samples.
A shear test was conducted, followed by an optical microscopy study to identify the location and type of failure, an electron microscopy study (SEM and TEM) and statistical analysis using the Kruskal-Wallis test for more than two independent samples and Mann-Whitney for two independent samples.
Resin cements bond by friction and by adhesion, understanding adhesion to be the close bond formed between two materials of a different chemical nature (2,4,8).
Silicate ceramics are roughened by hydrofluoric acid etching, whereas the oxide ceramics, lacking silica, are sandblasted or silica coated (2,9).
The chemical component is based on a chemical bond between the two materials produced by products such as silane or 10-methacryloyloxydecyl dihydrogen phosphate (MDP).
OBJECTIVES: The aim of this study was to evaluate bond strengths of zirconium-oxide (zirconia) ceramic and a selection of different composite resin cements.
STUDY DESIGN:130 Lava TM cylinders were fabricated.
Ceramics are classified according to their base, silicate or oxide, the latter being either aluminum or zirconium oxide (2).