Impact of Microabrasion on the Effectiveness of Tooth Bleaching

Abstract

The aim of the present study was to evaluate the effect of prior microabrasion on the teeth color change and tooth bleaching effectiveness. Eight sound molars were mesiodistally sectioned and the halves were randomly allocated to receive enamel microabrasion or non-abrasion (control) in one of surfaces (buccal or lingual), while the remaining surface received the other treatment. The tooth color on baseline was evaluated by spectrophotometer (CieL*a*b system). After the microabrasion procedure, the tooth color was measured again. Following, the specimens were bleached with 35% hydrogen peroxide for two sessions with one-week interval. The color was re-evaluated 7 days after each section and 30 days after the second session. The effect of enamel microabrasion on color changes was evaluated by paired T-test. Deltas L*, a*, b*, and E were calculated and data submitted to 2-way repeated measure ANOVA followed by Tukey`s test. Paired T-test was also used to assess possible differences on the ultimate color achieved after tooth bleaching. Enamel microabrasion reduced the lightness and increased the redness of specimens. Specimens that received microabrasion presented higher values of ∆L* than control after each bleaching procedure; and higher ∆a* after the 2 nd bleaching session. However, the prior enamel microabrasion did not affect the ultimate values of color parameters. Despite enamel microabrasion have modified the tooth color, this procedure did not affect the ultimate results achieved with tooth bleaching using a high-concentrated hydrogen peroxide.

La micro-abrasion amélaire associée à l’éclaircissement externe: intérêt dans la prise en charge de la fluorose

“…Dans le cas de la fluorose légère à modérée, l'association micro-abrasion/éclaircissement externe peut être un compromis raisonnable entre aspect esthétique acceptable, perte de substance minime, effets secondaires transitoires et coût abordable [19,20]. C'est le cas de la situation clinique illustrée dans ce travail, où le résultat de la micro-abrasion seule n'a pas répondu à la demande esthétique de la patiente tandis que l'association à l'éclaircissement externe a permis d'améliorer l'aspect esthétique et de satisfaire la patiente.…”

Effects of microabrasion association to at‐home bleaching on hydrogen peroxide penetration and color change

“…One of the current study's limitations was the use of only one MA product. Several characteristics could influence the final results of the MA procedure, including the concentration and pH of the acid used, the type of abrasive included in its composition, instrumentation time, applied force, application mode and revolutions per minute 7–9,19,29 . Also, although the amount of MA product used following the manufacturer's instructions, it was only visually checked.…”

“…Several characteristics could influence the final results of the MA procedure, including the concentration and pH of the acid used, the type of abrasive included in its composition, instrumentation time, applied force, application mode and revolutions per minute. [7][8][9]19,29 Also, although the amount of MA product used following the manufacturer's instructions, it was only visually checked. All these situations relate to the changes observed in the MA enamel, and future studies are necessary to evaluate these possibilities.…”

“…This variation in the amount of tissue removed depends on factors such as the concentration of the acid used, the duration of the application, the pressure exerted and the abrasiveness of the particles 8–10 . However, the teeth might acquire a darker or yellowish color after being subjected to enamel MA 9,11,12 . This occurs because the remaining enamel becomes thinner, showing more of the color of the dentin tissue 9 .…”

“…However, the teeth might acquire a darker or yellowish color after being subjected to enamel MA 9,11,12 . This occurs because the remaining enamel becomes thinner, showing more of the color of the dentin tissue 9 . Therefore, it is usually necessary after MA to employ bleaching techniques 13–15 …”