Comparison of the effect of different concentrations of potassium nitrate on tooth sensitivity and whitening of inoffice bleaching : a randomized clinical trial

Autor: Somacal, Deise Caren
Přispěvatelé: Spohr, Ana Maria
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Biblioteca Digital de Teses e Dissertações da PUC_RS
Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)
instacron:PUC_RS
Popis: The aim of this triple-blind, split-mouth, randomized trial was to evaluate the effect of different concentrations (5%, 10% or 35%) of potassium nitrate (PN) prior to in-office bleaching on tooth sensitivity (TS) and color change. Sixty participants were randomly divided into two groups (n=30): Group A: 5% PN (control) and 10% PN (treatment); and Group B: 5% PN (control) and 35% PN (treatment). Each concentration of PN was applied to a hemi-arch for 10 minutes. After the removal of the desensitizer gel, 35% bleaching agent (Whiteness HP Blue) was applied for 40 minutes. The participants underwent two sessions of bleaching with a one-week interval between sessions. TS was recorded using a questionnaire and a 0-10 visual analog scale after the first and second bleaching sessions, as well as one week after the second bleaching session. The color change was evaluated by a subjective method (Vita Classical and Bleach Color Chart) at baseline and one week after the second bleaching session. The prevalence of TS was evaluated using a McNemar?s test. TS intensity and color change were evaluated using Wilcoxon and Mann-Whitney tests, and Fisher Exact test was used to compare the sides of the mouth (?=0.05). The results showed that there was a significant reduction in the prevalence of TS in group A (p=0.013) and group B (p=0.000), although no significant difference was observed between the control and treatment sides (p>0.05). There was a significant reduction in TS intensity following the assessments for both groups (p0.05). In conclusion, the different concentrations of PN were effective in reducing the prevalence and intensity of TS, and the treatments did not affect color change. O objetivo deste estudo randomizado, triplo-cego com boca dividida, foi avaliar o efeito de diferentes concentra??es (5%, 10% ou 35%) de nitrato de pot?ssio (NP), antes do clareamento de consult?rio, sobre a sensibilidade dental (SD) e mudan?a de cor. Sessenta participantes foram divididos aleatoriamente em dois grupos (n=30): Grupo A: 5% NP (controle) e 10% NP (tratamento); e Grupo B: 5% NP (controle) e 35% NT (tratamento). Cada concentra??o de NP foi aplicada em um hemi-arco por 10 minutos. Ap?s a remo??o do gel dessensibilizante, foi aplicado agente clareador a 35% (Whiteness HP Blue) por 40 minutos. Os participantes foram submetidos a duas sess?es de clareamento com intervalo de uma semana entre as sess?es. A SD foi registrada por meio de question?rio e escala visual anal?gica de 0 a 10 ap?s a primeira e a segunda sess?es de clareamento, bem como uma semana ap?s a segunda sess?o de clareamento. A mudan?a de cor foi avaliada por um m?todo subjetivo (Vita Classical e Bleach Color Chart) no in?cio e uma semana ap?s a segunda sess?o de clareamento. A preval?ncia de SD foi avaliada por meio do teste de McNemar. A intensidade da SD e a mudan?a de cor foram avaliadas pelos testes de Wilcoxon e Mann- Whitney, e o teste Exato de Fisher comparou os lados da boca (?=0,05). Os resultados mostraram que houve redu??o significativa na preval?ncia de SD no grupo A (p=0,013) e no grupo B (p=0,000), embora n?o tenha sido observada diferen?a significativa entre os lados controle e tratamento (p>0,05). Houve redu??o significativa na intensidade da SD ap?s as avalia??es para ambos os grupos (p0,05). Concluiu-se que as diferentes concentra??es de NP foram eficazes na redu??o da preval?ncia e intensidade de SD, e os tratamentos n?o afetaram a mudan?a de cor. Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES
Databáze: OpenAIRE
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