Effect of toothbrushing with different manual toothbrushes on the shear bond strength of orthodontic brackets

• Autor(a) principal: de Oliveira, Guilherme José Pimentel Lopes [UNESP]
• Data de Publicação: 2010
• Outros Autores: Pavone, Chaine [UNESP], Costa, Maurício Ribeiro [UNESP], Marcantonio, Rosemary Adriana Chierici [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S1806-83242010000300010; http://hdl.handle.net/11449/71756
• topic: Orthodontic brackets; Primary prevention; Toothbrushing; resin cement; dental bonding; dental care; human; instrumentation; mechanical stress; methodology; nonparametric test; orthodontic device; shear strength; tooth brushing; Dental Bonding; Dental Stress Analysis; Humans; Orthodontic Brackets; Resin Cements; Shear Strength; Statistics, Nonparametric; Stress, Mechanical

The aim of this study was to evaluate the effect of brushing with a Colgate 360° 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/1 st and 2 nd pre-molar 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 360°. 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/cm 2) did not differ among the three groups. The Colgate 360° 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.