title: Effect of pumice prophylaxis on the bond strength of orthodontic brackets.
abstract: Pumice prophylaxis has long been accepted as a prerequisite for achieving adequate enamel etching during orthodontic bonding procedures. Three methods were used in this study to examine the effects of pumice prophylaxis on the bond strength of orthodontic brackets: (1) shear bond strength of brackets that were bonded to extracted premolars after surface preparation procedures, which either included or did not include prior pumice prophylaxis, was evaluated; (2) scanning electron microscopy (SEM) was used to examine the surface characteristics of teeth that had been etched with and without prior pumice prophylaxis; and (3) rate of bracket failure in patients who had had brackets bonded with and without prior pumice prophylaxis was recorded during an average treatment time of 18 months. No significant differences were noted in bond strength, general etched enamel surface characteristics, or bracket retention rates. Some specific differences, however, were noted on SEM in localized areas of the etched enamel surfaces, although these did not appear to affect the bond strength or bracket retention rates ultimately attained.
authors.affiliation: Department of Orthodontics, School of Dentistry, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298-0566, USA.
authors.forename: S J
authors.initials: SJ
authors.lastname: Lindauer
authors.forename: H
authors.initials: H
authors.lastname: Browning
authors.forename: B
authors.initials: B
authors.lastname: Shroff
authors.forename: F
authors.initials: F
authors.lastname: Marshall
authors.forename: R H
authors.initials: RH
authors.lastname: Anderson
authors.forename: P C
authors.initials: PC
authors.lastname: Moon
mesh_terms: D000134:Acid Etching, Dental; D000704:Analysis of Variance; D016009:Chi-Square Distribution; D001840:Dental Bonding / Q000379:methods*; D003743:Dental Enamel / Q000648:ultrastructure; D003777:Dental Prophylaxis / Q000379:methods*; D006801:Humans; D016910:Orthodontic Brackets; D019279:Resin Cements; D017640:Silicates; D013193:Stainless Steel; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D019279:Resin Cements; D017640:Silicates; D013193:Stainless Steel; C005144:pumice