Influence of contamination on resin bond strength to nano-structured alumina-coated zirconia ceramic

• Published in: European journal of oral sciences Vol. 118; no. 4; pp. 396 - 403
• Main Authors: Zhang, Shanchuan, Kocjan, Andraž, Lehmann, Frank, Kosmač, Tomaž, Kern, Matthias
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.08.2010
• Subjects: Acid Etching, Dental; Aluminum Oxide - chemistry; bond strength; Carbon Compounds, Inorganic - chemistry; Coated Materials, Biocompatible - chemistry; Coloring Agents - chemistry; Composite Resins - chemistry; contamination; Dental Bonding; Dental Materials - chemistry; Dental Polishing; Dental Porcelain - chemistry; Dental Stress Analysis - instrumentation; Dentistry; Humans; Materials Testing; Methacrylates - chemistry; Microscopy, Electron, Scanning; nano-structured alumina-coated zirconia; Nanostructures - chemistry; Phosphates - chemistry; phosphoric acid cleaning; Phosphoric Acids - chemistry; resin bonding; Resin Cements - chemistry; Saliva; Silicon Compounds - chemistry; Silicones - chemistry; Stress, Mechanical; Surface Properties; Temperature; Tensile Strength; Time Factors; Water - chemistry; Yttrium - chemistry; Zirconium - chemistry
• ISSN: 0909-8836; 1600-0722
• DOI: 10.1111/j.1600-0722.2010.00752.x

Zhang S, Kocjan A, Lehmann F, Kosmač T, Kern M. Influence of contamination on resin bond strength to nano‐structured alumina‐coated zirconia ceramic. Eur J Oral Sci 2010; 118: 396–403. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci The purpose of this study was to evaluate the influence of contamination and subsequent cleaning on the bond strength and durability of an adhesive resin to nano‐structured alumina‐coated zirconia ceramic. Zirconia ceramic disks were coated with nano‐structured alumina, utilizing the hydrolysis of aluminum nitride powder. After immersion in saliva or the use of a silicone disclosing agent, specimens were cleaned with phosphoric acid etching or with tap water rinsing only. Uncontaminated specimens served as controls. Plexiglas tubes filled with composite resin were bonded with a phosphate monomer [10‐methacryloxydecyl‐dihydrogenphosphate (MDP)]‐containing resin (Panavia 21). Subgroups of eight specimens each were stored in distilled water at 37°C, either for 3 d without thermal cycling (TC) or for 150 d with 37,500 thermal cycles from 5 to 55°C. The tensile bond strength (TBS) was determined using a universal testing machine at a crosshead speed of 2 mm min−1. The topography of the debonded surface was scrutinized for fractographic features, utilizing both optical and scanning electron microscopy. The TBS to uncontaminated nano‐structured alumina‐coated zirconia ceramic was durable, while contamination significantly reduced the TBS. Phosphoric acid cleaning was effective in removal of saliva contamination from the coated bonding surface but was not effective in removal of the silicone disclosing agent. Nano‐structured alumina coating improves resin bonding to zirconia ceramic and eliminates the need for air‐abrasion before bonding.