Ana Cristina Távora de Albuquerque Lopes, Nair Cristina Margarido Brondino, Juliana Fraga Soares Bombonatti, Rafael Francisco Lia Mondelli
{"title":"Effectiveness of violet LED with or without a bleaching gel: a 12-month randomized clinical trial.","authors":"Ana Cristina Távora de Albuquerque Lopes, Nair Cristina Margarido Brondino, Juliana Fraga Soares Bombonatti, Rafael Francisco Lia Mondelli","doi":"10.3389/fdmed.2024.1427301","DOIUrl":null,"url":null,"abstract":"<p><strong>Introduction: </strong>The present interventional, controlled, randomized, blind clinical study aimed to evaluate the effectiveness of an in-office bleaching procedure with violet LED associated or not with 37% carbamide peroxide, considering as response variables the degree of change and color stability over 12 months and dental sensitivity over a month.</p><p><strong>Methods: </strong>Forty participants, according to the inclusion and exclusion criteria, were randomly divided into 2 groups (<i>n</i> = 20) according to the bleaching protocol conducted, in two sessions, with a 7-day interval: vLED-violet LED, without gel; vLED/CP-37% carbamide peroxide photocatalyzed with violet LED (control group). In the vLED group, in each session the bleaching was carried out by 2 consecutive irradiation cycles of 25' each (10 × 2' LED + 30\" interval), with 5' interval between cycles. In the vLED/CP group, the gel was applied 5 times in the bleaching session and photocatalyzed 3 times for 2' with 30\" intervals (7'30\" per gel application), totaling 37'30\" per session. Dental sensitivity was assessed using a visual analog scale (VAS) and the effectiveness of bleaching as a function of the degree of change and color stability (<i>Δ</i>E) with a spectrophotometer. The data were tabulated and submitted to statistical tests (<i>p</i> < 0.05).</p><p><strong>Results: </strong>The VAS analysis showed that some individuals from both groups had mild pain (1 ≤ VAS < 4) during the time intervals evaluated, being more prevalent in the vLED/CP group. Regarding the degree of color change, the groups behaved differently over time (<i>p</i> < 0.0001). The <i>Δ</i>E observed for the vLED/CP group was superior in comparison to the vLED group at all evaluated moments.</p><p><strong>Conclusions: </strong>Over 12 months, the vLED/CP group was more effective in relation to the bleaching effect compared to the vLED group. Both groups showed low levels of sensitivity in the studied time intervals.</p><p><strong>Clinical trial registration: </strong>[https://ensaiosclinicos.gov.br/rg/RBR-6rc23h], identifier [U1111-1253-8850].</p>","PeriodicalId":73077,"journal":{"name":"Frontiers in dental medicine","volume":"5 ","pages":"1427301"},"PeriodicalIF":1.5000,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11797755/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Frontiers in dental medicine","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3389/fdmed.2024.1427301","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/1/1 0:00:00","PubModel":"eCollection","JCR":"Q3","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
引用次数: 0
Abstract
Introduction: The present interventional, controlled, randomized, blind clinical study aimed to evaluate the effectiveness of an in-office bleaching procedure with violet LED associated or not with 37% carbamide peroxide, considering as response variables the degree of change and color stability over 12 months and dental sensitivity over a month.
Methods: Forty participants, according to the inclusion and exclusion criteria, were randomly divided into 2 groups (n = 20) according to the bleaching protocol conducted, in two sessions, with a 7-day interval: vLED-violet LED, without gel; vLED/CP-37% carbamide peroxide photocatalyzed with violet LED (control group). In the vLED group, in each session the bleaching was carried out by 2 consecutive irradiation cycles of 25' each (10 × 2' LED + 30" interval), with 5' interval between cycles. In the vLED/CP group, the gel was applied 5 times in the bleaching session and photocatalyzed 3 times for 2' with 30" intervals (7'30" per gel application), totaling 37'30" per session. Dental sensitivity was assessed using a visual analog scale (VAS) and the effectiveness of bleaching as a function of the degree of change and color stability (ΔE) with a spectrophotometer. The data were tabulated and submitted to statistical tests (p < 0.05).
Results: The VAS analysis showed that some individuals from both groups had mild pain (1 ≤ VAS < 4) during the time intervals evaluated, being more prevalent in the vLED/CP group. Regarding the degree of color change, the groups behaved differently over time (p < 0.0001). The ΔE observed for the vLED/CP group was superior in comparison to the vLED group at all evaluated moments.
Conclusions: Over 12 months, the vLED/CP group was more effective in relation to the bleaching effect compared to the vLED group. Both groups showed low levels of sensitivity in the studied time intervals.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
