Friday, March 23, 2012: 10:45 a.m. - 12:15 p.m.
Presentation Type: Oral Session
Objectives: The study aimed at investigating the influence of plasma pre-treatment (PT) and incorporation of 4-META in a conditioning liquid on the shear-bond strength (SBS) to zirconia dioxide.
Methods: Sixty-four zirconia blocks were embedded and wet ground. The surfaces were either exposed to atmospheric plasma or remained untreated (n=32). Subsequently, surfaces were coated with one of two experimental liquids (ExpB: Bis-GMA/TEDMA/acetone; ExpB-4M: ExpB+4-META) or Alloy Primer including a control. Variolink II was bonded to the surfaces and a SBS-test performed after 8 days water-storage (37°C). Data was subjected to parametric statistics (α=.05).
Results: The use of adhesive monomers (Alloy Primer, ExpB-4M) significantly increased SBS (p<0.05). PT strongly affected SBS (p<0.05).
Conclusions: PT was not able to increase SBS under the applied conditions. Adhesive monomers are mandatory to bond to zirconia.
Keywords: Adhesion, Biomaterials, Cements and Polymers
Presenting author's disclosure statement: The author is actually employee of Heraeus Kulzer. The research was conducted previous to this employment.