Randomized controlled trial of sealed in-office bleaching effectiveness.

Regardless of the high success rate, patients commonly report the occurrence of tooth sensitivity during the in-office bleaching procedures. Recently, it has been demonstrated that using a customized tray (called sealed in-office bleaching technique) reduces peroxide penetration. The aim of this randomized clinical study was to evaluate tooth sensitivity and bleaching efficacy of sealed bleaching, in comparison with a conventional in-office technique. Twenty patients were randomized allocated in two groups in which 35% hydrogen peroxide gel was used in a single 45-min application. For the sealed technique, a customized bleaching tray was fabricated and carefully positioned over the bleaching agent during the session. The color was recorded at a baseline, 7 and 28 days after the bleaching session, using Vita Easy Shade spectrophotometer. Tooth sensitivity was recorded during (20 and 40 min) and immediately after the treatment using a visual analogue scale. The bleaching efficacy was evaluated by repeated-measures ANOVA, while the absolute risk of tooth sensitivity and its intensity were evaluated by Fisher's exact and Mann-Whitney tests, respectively (α=0.05). No significant difference on bleaching efficacy was observed between the conventional (7.4 and 8.1 ΔE) and sealed techniques (7.8 and 8.3 ΔE) at both evaluation periods. No significant difference was observed regarding the absolute risk of tooth sensitivity (p=0.15). Sealed technique showed a significant decrease of sensitivity intensity after 40 min (p=0.03). Sealed bleaching technique was able to reduce the sensitivity intensity during the bleaching procedure, without jeopardizing the bleaching efficacy.

Randomized Controlled Trial of Sealed In-Office Bleaching Effectiveness

Regardless of the high success rate, patients commonly report the occurrence of tooth sensitivity during the in-office bleaching procedures. Recently, it has been demonstrated that using a customized tray (called sealed in-office bleaching technique) reduces peroxide penetration. The aim of this randomized clinical study was to evaluate tooth sensitivity and bleaching efficacy of sealed bleaching, in comparison with a conventional in-office technique. Twenty patients were randomized allocated in two groups in which 35% hydrogen peroxide gel was used in a single 45-min application. For the sealed technique, a customized bleaching tray was fabricated and carefully positioned over the bleaching agent during the session. The color was recorded at a baseline, 7 and 28 days after the bleaching session, using Vita Easy Shade spectrophotometer. Tooth sensitivity was recorded during (20 and 40 min) and immediately after the treatment using a visual analogue scale. The bleaching efficacy was evaluated by repeated-measures ANOVA, while the absolute risk of tooth sensitivity and its intensity were evaluated by Fisher's exact and Mann-Whitney tests, respectively (α=0.05). No significant difference on bleaching efficacy was observed between the conventional (7.4 and 8.1 ΔE) and sealed techniques (7.8 and 8.3 ΔE) at both evaluation periods. No significant difference was observed regarding the absolute risk of tooth sensitivity (p=0.15). Sealed technique showed a significant decrease of sensitivity intensity after 40 min (p=0.03). Sealed bleaching technique was able to reduce the sensitivity intensity during the bleaching procedure, without jeopardizing the bleaching efficacy.

Apesar da alta taxa de sucesso, os pacientes comumente relatam a ocorrência de sensibilidade dental durante os procedimentos clareadores em consultório. Recentemente, foi demostrado que o uso de uma moldeira customizada (denominada de técnica de consultório selada) reduz a penetração de peróxido. O objetivo deste ensaio clínico randomizado foi avaliar sensibilidade dentária e eficiência de clareamento do clareamento selado, em comparação com a técnica convencional de consultório. Vinte pacientes foram aleatoriamente divididos em dois grupos. Em ambos os grupos, um gel de peróxido de hidrogênio a 35% foi usado em uma simples aplicação de 45 minutos. Para a técnica selada, uma moldeira de clareamento customizada foi confeccionada e cuidadosamente posicionada sobre o agente clareador durante a sessão. A cor foi registrada no início, 7 e 28 dias após a sessão de clareamento usando a espectrofotômetro Vita easy shade. Sensibilidade dental foi registrada durante (20 e 40 minutos) e imediatamente após o tratamento usando uma escala visual analógica. A eficácia do clareamento foi avaliada por ANOVA de medidas repetidas, enquanto o risco absoluto de sensibilidade dental e a sua intensidade foram avaliados pelos testes de Fisher e Mann-Whitney, respectivamente (α=0.05). Nenhuma diferença na eficácia do clareamento foi observada entre as técnicas convencional (7.4 e 8.1 ΔE) e selada (7.8 e 8.3 ΔE) para ambos os tempos de avaliação. Nenhuma diferença foi observada em relação ao risco de sensibilidade dental (p = 0,15). A técnica selada mostrou uma significante diminuição da intensidade de sensibilidade após 40 minutos (p = 0,03). A técnica selada de clareamento reduziu a intensidade da sensibilidade durante o procedimento clareador, sem ...