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A Comparison Of Liquid And Gel Etchants Determining Shear And Tensile Bond Strengths Of Four Orthodontic Adhesives, Gary M. Edgmon
A Comparison Of Liquid And Gel Etchants Determining Shear And Tensile Bond Strengths Of Four Orthodontic Adhesives, Gary M. Edgmon
Loma Linda University Electronic Theses, Dissertations & Projects
The purpose of this study was to compare liquid and gel etchants (37% phosphoric acid) by measuring tensile and shear bond strengths of four orthodontic adhesive systems.
Four orthodontic adhesives were tested on 287 extracted human teeth, 144 of which were etched with liquid and 143 with gel. The four adhesives tested were Concise-3M, Challenge-Ormco (new product), Unite-Unitek (no mix), and Fuji Glass-ionomer filling material or cement.
To eliminate the use of wire for bracket engagement during testing, two devices were designed and machined for direct attachment to the Instron testing machine: a rigid push rod for shear force and …