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The Journal of Adhesive Dentistry

Edited by Prof. Dr. Roland Frankenberger, Prof. Bart Van Meerbeek

ISSN (print) 1461-5185 • ISSN (online) 1757-9988


Summer 2000
Volume 2 , Issue 2

Pages: 139-147
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Long-term Resin Bond Strength to Zirconia Ceramic.

Wegner, Stefan M.; Kern, Matthias

Purpose: The aim of this in vitro study was to evaluate the long-term bond strength of adhesive bonding systems to yttrium-oxide-partially-stabilized zirconia ceramic [YPBZ]. Materials and Methods: Plexiglas tubes filled with resin composite were bonded to industrially manufactured zirconia ceramic disks (96% ZrO2 stabilized by 4% Y2O3). After air abrading the ceramic and ultrasonic cleansing, groups of 16 samples mere bonded in an alignment apparatus using 7 different bonding methods. Subgroups of 8 bonded samples were tested tor tensile strength following storage in distilled water at 37C either for 3 days or 2 years. In addition, the 2-year samples were thermocycled 37,500 times. The statistical analyses were conducted with the Krushal-Wallis test followed by multiple pair-wise comparison of the groups using the Wilcoxon rank sum test. Results: A moderate to relatively high initial bond strength was achieved by air abrasion alone, the additional use of a silane, or acrylizing the YPSZ surface in combination with a conventional bis-GMA resin composite. However, these methods failed spontaneously over storage time. The use of the bis-GMA resin composite after tribochemical silica coating of VPSZ and the use of a polyacid-modified resin composite after air abrasion of IPSZ resulted in a high initial bond strength which decreased significantly over storage time. A durable resin bond strength to VPSZ was achieved only after air abrasion of VPSZ and using one of two resin composites containing a special phosphate monomer. Conclusion: A durable bond strength to IPSZ was achieved only by using resin composites containing a special adhesive monomer.

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