708 Bonding to Zirconia Ceramic: Effect of PlasmaJet Treatment and 4-META

Friday, March 23, 2012: 10:45 a.m. - 12:15 p.m.
Presentation Type: Oral Session
M. BALKENHOL, Clinic for Operative Dentistry and Periodontology, Saarland University, Homburg, Germany, F. NOTHDURFT, Dept. of Prosthetic Dentistry, Saarland University, Homburg, Germany, M. HANNIG, Abt. Fuer Zahnerhaltung ung Parodontologie, University of Saarland, Homburg, Germany, A. SCHINDLER, IOM e.V, Leipzig, Germany, A. KNAUBER, Clinic for Prosthodontics, Saarland University, Homburg, Germany, and S. RUPF, Clinic of Operative Dentistry, Periodontology, University of Saarland, Homburg, Saar, Germany
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.