The bond strength of orthodontic resins to porcelain.
Orthodontic brackets were bonded to one of two porcelain surfaces using a self-cured or one of two light-activated orthodontic bonding resins. The porcelain surfaces were either glazed (control) or deglazed (experimental) by being subjected to either 1.23% APF for 4 minutes or roughened with a Busch silent wheel. The bonds were tested to failure in shear mode on a universal mechanical testing machine. For one porcelain, there was no significant difference in the mean bond strengths between the control and the APF-treated surface, but for the second porcelain the mean bond strength was significantly greater when the surface was de-glazed by abrasion. It is considered that the mean bond strengths may be inadequate to withstand manipulations associated with routine orthodontic therapy.
White
G J
GJ
School of Dental Science, University of Melbourne.
Tyas
M J
MJ
D000134:Acid Etching, Dental; D000149:Acidulated Phosphate Fluoride / Q000737:chemistry; D000180:Acrylic Resins / Q000737:chemistry; D000537:Aluminum Oxide / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D001840:Dental Bonding; D003776:Dental Porcelain / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D016910:Orthodontic Brackets; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties
D000180:Acrylic Resins; C095718:Duceram; D019279:Resin Cements; C045637:System 1 plus; D003776:Dental Porcelain; C065742:Transbond; D000149:Acidulated Phosphate Fluoride; D017438:Bisphenol A-Glycidyl Methacrylate; C058236:Vitadur N; D000537:Aluminum Oxide