title: Air abrasion of failed bonded metal brackets: a study of shear bond strength and surface characteristics as determined by scanning electron microscopy.
abstract: Failed bonded orthodontic brackets generally require their replacement with a new bracket. The introduction of air abrasion (microetching) technology to orthodontics may allow for immediate use of these failed brackets. This study compared the in vitro shear bond strengths of previously failed bonded metal brackets (experimental group) subjected to air abrasion with new untreated brackets (control group). All bonding used a light-cured orthodontic bonding system. In addition, representative samples from each group were examined by scanning electron microscopy. The results of this study found no significant differences in shear bond strengths between the two groups. Scanning electron microscopy examination of the air abraded brackets revealed a roughened mesh surface with residual bonded material in the bracket base. This simple technique should allow for the immediate reuse of previously failed bonded metal brackets.
authors.affiliation: Dental Department, The Children's Hospital, Boston, MA 02115, USA.
authors.forename: A L
authors.initials: AL
authors.lastname: Sonis
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D000388:Air; D000537:Aluminum Oxide / Q000008:administration & dosage; D001641:Bicuspid; D003188:Composite Resins / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry*; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003799:Dental Stress Analysis; D004868:Equipment Failure; D006801:Humans; D008855:Microscopy, Electron, Scanning; D016910:Orthodontic Brackets; D010756:Phosphoric Acids / Q000008:administration & dosage; D019279:Resin Cements; D012117:Resins, Synthetic / Q000737:chemistry; D016037:Single-Blind Method; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D003722:Dental Alloys; D003738:Dental Cements; D010756:Phosphoric Acids; C097531:Rely a Bond system; D019279:Resin Cements; D012117:Resins, Synthetic; D013193:Stainless Steel; D000537:Aluminum Oxide