Colorimetric evaluation after in-office tooth bleaching with violet LED: 6-and 12-month follow-ups of a randomized clinical trial

Autor(es)

Kury, Matheus ^[1] ; Wada, Erica Eiko ^[1] ; Palandi, Samuel da Silva ^[1] ; Dal Picolo, Mayara Zaghi ^[1] ; Giannini, Marcelo ^[1] ; Cavalli, Vanessa ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Restorat Dent, 901 Limeira Ave, BR-13414903 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CLINICAL ORAL INVESTIGATIONS; v. 26, n. 1 JUL 2021.
• Citações Web of Science: 2

Resumo

Objectives To evaluate the long-term outcomes of in-office bleaching with violet LED light (LED) alone or combined with carbamide (CP) or hydrogen (HP) peroxides. Methods Volunteers of a previous short-term study were recalled for 6- and 12-month follow-ups, according to the following interventions (n = 18/group): LED, CP, LED/CP, HP, and LED/HP. The objective color (Delta E-ab, Delta E-00) and whiteness index (Delta WID) changes were calculated applying the CIELab coordinates' values obtained using a spectrophotometer. A visual shade guide determined the tooth's subjective color change (Delta SGU). Data were submitted to one-way ANOVA or Welch's ANOVA, following appropriate post hoc tests (alpha = 5%). Results The LED and CP groups exhibited the lowest Delta E-ab, Delta E-00, and Delta SGU (p < 0.05), but the LED group displayed a significantly lower Delta WID. After 12 months, the LED/CP group presented a higher Delta E-ab and Delta E-00 than the CP group (p < 0.05). Delta E-ab, Delta E-00, Delta SGU, or Delta WID means did not differ statistically between the LED/CP and HP groups. The LED/HP group presented a higher Delta E-00 than the HP group, regardless of the time. Conclusions The bleaching efficacy of LED alone was significantly lower compared to the LED/CP and HP-containing protocols. After 12 months, the LED/CP and HP groups did not differ in bleaching efficacy. LED irradiation only increased the objective color change of bleaching gels. National Clinical Trials Registry (REBEC) RBR-5t6bd9 (AU)

• Processo FAPESP: 17/08625-0 - Análise in vitro do LED violeta e do plasma de argônio na alteração de cor, conteúdo mineral, morfologia e segurança do clareamento dental
• Beneficiário: Matheus Kury Rodrigues
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 17/24847-3 - Análise in vivo do LED violeta na alteração de cor, sensibilidade e conteúdo mineral do clareamento dental
• Beneficiário: Erica Eiko Wada
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 17/23841-1 - Análise in vitro/in vivo do LED violeta e in vitro do plasma de argônio na alteração de cor, conteúdo mineral, morfologia e segurança do clareamento dental
• Beneficiário: Vanessa Cavalli Gobbo
• Modalidade de apoio: Auxílio à Pesquisa - Regular