Effect of bleaching gel volume on color change and postoperative sensitivity: a randomized clinical study

Autor(es)

Bueno Esteves, Lara Maria ^[1] ; dos Santos, Paulo Henrique ^[2] ; Fagundes, Ticiane Cestari ^[1] ; de Oliveira Gallinari, Marjorie ^[3] ; de Mello Antonaccio, Giulia Bessa ^[1] ; Angelo Cintra, Luciano Tavares ^[1] ; Fraga Briso, Andre Luiz ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Sch Dent Aracatuba, Dept Prevent & Restorat Dent, Jose Bonifacio 1193, BR-16015050 Aracatuba, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Sch Dent Aracatuba, Dept Dent Mat & Prosthodont, Jose Bonifacio 1193, BR-16015050 Aracatuba, SP - Brazil

^[3] Bauru Sch Dent USP, Dept Operat Dent Endodont & Dent Mat, Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CLINICAL ORAL INVESTIGATIONS; OCT 2021.
• Citações Web of Science: 0

Resumo

Objectives Although bleaching therapy is considered a dose-dependent treatment, the effect of the volume of product used is yet to be studied. This study thus aimed to evaluate the influence of bleaching gel volume on chromatic alteration and postoperative sensitivity. Methodology Thirty patients were selected and allocated into three groups; the lower canines were analyzed according to the volume of gel used: GI-0.025 mL, GII-0.05 mL, and GIII-0.10 mL. Chromatic alteration analysis was performed using a portable digital spectrophotometer by calculating the Delta E, Delta E00, Delta L{*}, Delta a{*}, and Delta b{*} values and the whiteness index (W-ID). Spontaneous sensitivity was assessed using a questionnaire, and sensitivity was stimulated by thermo-sensory analysis. Analyses were conducted in five stages: baseline, after 1st, 2nd, and 3rd bleaching sessions, and 14 days after the end. Data were analyzed using the two-way ANOVA test with repeated measures and Tukey's post hoc test (p < 0.05). Results It was observed that Delta E, Delta E00, and Delta L{*} were similar between groups at the end of the bleaching therapy; and the values of Delta a{*}, Delta b{*}, and WID were higher in the GIII group. For sensitivity, it was found that the GI was the one with the lowest values; o GII intermediate values; while the GIII group presents the highest values of spontaneous and stimulated sensitivity. Conclusion Gel volume influenced the response to bleaching and significantly influenced the spontaneous sensitivity and cold stimulus. Clinical relevance. The amount of bleaching gel used during therapy is key to both the response to color change and postoperative sensitivity. (AU)

• Processo FAPESP: 18/11636-7 - Conhecendo a terapia clareadora: efeito da quantidade e da área de aplicação do gel na alteração cromática e na sensibilidade pós-operatória
• Beneficiário: Lara Maria Bueno Esteves
• Modalidade de apoio: Bolsas no Brasil - Mestrado