کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1422181 986439 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface modification for enhanced silanation of zirconia ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Surface modification for enhanced silanation of zirconia ceramics
چکیده انگلیسی

ObjectiveThe overall goal of this research was to develop a practical method to chemically modify the surface of high strength dental ceramics (i.e. zirconia) to facilitate viable, robust adhesive bonding using commercially available silanes and resin cements.MethodsInvestigation focused on a novel approach to surface functionalize zirconia with a SixOy “seed” layer that would promote chemical bonding with traditional silanes. ProCAD and ZirCAD blocks were bonded to a dimensionally similar composite block using standard techniques designed for silica-containing materials (silane and resin cement). ZirCAD blocks were treated with SiCl4 by vapor deposition under two different conditions prior to bonding. Microtensile bars were prepared and subjected to tensile forces at a crosshead speed of 1 mm/min scanning electron microscopy was used to analyze fracture surfaces and determine failure mode; either composite cohesive failure (partial or complete cohesive failure within composite) or adhesive failure (partial or complete adhesive failure).ResultsPeak stress values were analyzed using single-factor ANOVA (p < 0.05). Microtensile testing results revealed that zirconia with a surface treatment of 2.6 nm SixOy thick “seed” layer was similar in strength to the porcelain group (control). Analysis of failure modes indicated the above groups displayed higher percentages of in-composite failures. Other groups tested had lower strength values and displayed adhesive failure characteristics.ConclusionMechanical data support that utilizing a gas-phase chloro-silane pretreatment to deposit ultra-thin silica-like seed layers can improve adhesion to zirconia using traditional silanation and bonding techniques. This technology could have clinical impact on how high strength dental materials are used today.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dental Materials - Volume 25, Issue 9, September 2009, Pages 1116–1121
نویسندگان
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