title: Effect of toothbrushing with different manual toothbrushes on the shear bond strength of orthodontic brackets.
abstract: The aim of this study was to evaluate the effect of brushing with a Colgate 360º or Oral B Indicator 35 toothbrush on the shear bond strength of orthodontic brackets bonded to extracted human teeth. The bristle wear and bristle tip morphology were also examined after simulated tooth-brushing. Orthodontic brackets (Roth-P/1st and 2nd premolar S/D- Slot 0.18") were bonded (Transbond XT) to the smoothest surface of each of 45 extracted human molar and premolar teeth. Test specimens were randomly divided into three groups: Group 1, control group with no brushing; Group 2, brushing with the Oral B Indicator 35; Group 3, brushing with the Colgate 360º. Samples were adapted to a machine that simulated tooth-brushing. The bond strength of each bracket to each tooth was assessed with a mechanical testing machine. The bristle wear and bristle tip morphology indices were also assessed. Statistically significant differences were defined for p < 0.05. The average bond strengths (range: 90.18-90.89 kgf/cm²) did not differ among the three groups. The Colgate 360º showed less bristle wear and a better bristle tip morphology than the Oral B Indicator 35 toothbrush. However, use of either toothbrush did not decrease the bond strength of the orthodontic brackets. Therefore, patients undergoing orthodontic therapy can safely use either toothbrush.
authors.affiliation: Department of Diagnosis and Surgery, Division of Periodontology, School of Dentistry at Araraquara, São Paulo State University, Araraquara, SP, Brazil. guioliveiraodonto@hotmail.com
authors.forename: Guilherme José Pimentel Lopes de
authors.initials: GJ
authors.lastname: Oliveira
authors.forename: Chaine
authors.initials: C
authors.lastname: Pavone
authors.forename: Maurício Ribeiro
authors.initials: MR
authors.lastname: Costa
authors.forename: Rosemary Adriana Chiérici
authors.initials: RA
authors.lastname: Marcantonio
mesh_terms: D001840:Dental Bonding; D003799:Dental Stress Analysis; D006801:Humans; D016910:Orthodontic Brackets; D019279:Resin Cements; D033081:Shear Strength; D018709:Statistics, Nonparametric; D013314:Stress, Mechanical; D014099:Toothbrushing / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods
chemical_list: D019279:Resin Cements