Effect of toothbrushing with different manual toothbrushes on the shear bond strength of orthodontic brackets.
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.
Oliveira
Guilherme José Pimentel Lopes de
GJ
Department of Diagnosis and Surgery, Division of Periodontology, School of Dentistry at Araraquara, São Paulo State University, Araraquara, SP, Brazil. guioliveiraodonto@hotmail.com
Pavone
Chaine
C
Costa
Maurício Ribeiro
MR
Marcantonio
Rosemary Adriana Chiérici
RA
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
D019279:Resin Cements