Effects of surface treatment on orthodontic bonding to amalgam.
OBJECTIVE
This study aimed to compare the shear bond strengths of metal brackets bonded to amalgam surfaces.


METHODS
One hundred and fifty amalgam samples were fabricated and either polished, roughened with a diamond bur or sandblasted with 50 mm aluminium oxide. Following thermocycling the shear bond strengths were tested and compared with control samples bonded to etched enamel.


RESULTS
Concise resin composite, Metal Primer/Concise resin composite and All-Bond II/Concise resin composite bonded to sandblasted amalgam gave the highest mean shear strengths and were statistically similar to the etched enamel/Concise resin composite controls.


CONCLUSIONS
One would expect sandblasted amalgam surfaces to be associated with higher shear bond strengths than diamond bur roughened or polished amalgam surfaces.
Skilton
Jonathan W
JW
School of Dental Science, The University of Melbourne, Melbourne, Victoria, Australia.
Tyas
Martin J
MJ
Woods
Michael G
MG
D000134:Acid Etching, Dental; D000180:Acrylic Resins / Q000737:chemistry; D020906:Air Abrasion, Dental; D000537:Aluminum Oxide / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003723:Dental Amalgam / Q000737:chemistry*; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure; D003764:Dental Materials / Q000737:chemistry; D003775:Dental Polishing; D018130:Diamond / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D016910:Orthodontic Brackets; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties
D000180:Acrylic Resins; D000538:Aluminum Silicates; D003188:Composite Resins; D003764:Dental Materials; C095451:Fuji Ortho LC; D005899:Glass Ionomer Cements; D008689:Methacrylates; D019279:Resin Cements; C474102:alloybond; C100742:All-Bond 2; C100646:Metal Primer; D017438:Bisphenol A-Glycidyl Methacrylate; D018130:Diamond; D003723:Dental Amalgam; D000537:Aluminum Oxide