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Master's Dissertation
DOI
https://doi.org/10.11606/D.58.2021.tde-21102022-144035
Document
Author
Full name
Renato Gonçalves dos Reis
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2020
Supervisor
Committee
Corona, Silmara Aparecida Milori (President)
Zotti, Fabiana Almeida Curylofo
Naufel, Fabiana Scarparo
Quagliatto, Paulo Sérgio
Title in Portuguese
Análise longitudinal das restaurações de resina composta realizadas em dente erodido tratado com nanoformulação de quitosana contendo chá verde
Keywords in Portuguese
Chá verde
Erosão
Estudo clínico
Nanopartículas
Quitosana
Abstract in Portuguese
A adesão de restaurações de compósitos à dentina erodida apresenta longevidade clínica comprometida devido a degradação das fibrilas de colágeno, sendo que, a utilização de biomodificadores visam melhorar a interface adesiva em procedimentos restauradores. O objetivo deste estudo foi avaliar a influência da biomodificação com nanoformulação de quitosana contendo chá verde (Camellia sinensis) (NanoCsQ) em lesões de erosão por meio de análise clínica e fotográfica das restaurações realizadas. A amostra foi composta por 20 pacientes entre 20 e 50 anos que apresentavam lesões de erosão não cariosas, de profundidade rasa ou média, localizadas na superfície palatina e/ou lingual, oclusal e/ou incisal de dois dentes homólogos. Os dentes de cada paciente foram distribuídos aleatoriamente em dois grupos (n=20) de acordo com o tratamento da superfície da dentina: 1) Controle (sem biomodificação) e 2) NanoCsQ. Foi realizado condicionamento com ácido fosfórico a 35%, e em seguida, a lavagem da cavidade. A biomodificação com NanoCsQ foi realizada por 1 minuto, e a superfície foi seca com papel absorvente. Em seguida, as lesões foram restauradas com sistema adesivo (Tetric N-bond - Ivoclar) e resina composta (IPS - Ivoclar). As restaurações foram polidas, e após 7 dias, 6 meses e 12 meses avaliadas segundo os critérios United States Public Health Service (USPHS) modificados. Os dados foram analisados descritivamente e também pelos testes de Friedman e Wilcoxon (α=5%). Durante o período analisado, 100% das restaurações receberam escores alpha para os critérios descoloração marginal, adaptação marginal e sensibilidade pós-operatória. Para o critério retenção, 90% das restaurações apresentaram escore alpha e apenas 10% das restaurações controle apresentaram escore charlie aos 12 meses, sem diferença significante entre os tratamentos (p=0,432), períodos (baseline, 6 meses e 1 ano) (p=0,500) e interação tratamento x período (p=0,126). Na análise fotográfica, todas restaurações receberam escore alpha para os critérios analisados. Concluíu-se que após um ano, a biomodificação da dentina erodida com nanoformulação de quitosana contendo chá verde não afetou o desempenho das restaurações de resina composta.
Title in English
Longitudinal analysis of composite resin restorations performed on eroded tooth treated with chitosan nanoformulation containing green tea
Keywords in English
Chitosan
Clinical study
Erosion
Green tea
Nanoparticles
Abstract in English
The adhesion of composite restorations to eroded dentin has compromised clinical longevity due to the degradation of collagen fibrils, and the use of biomodifiers aims to improve the adhesive interface in restorative procedures. The aim of this study was to evaluate the influence of biomodification with chitosan nanoformulation containing green tea (Camellia sinensis) (NanoCsQ) on erosion lesions through clinical and photographic analysis of the restorations performed. The sample consisted of 20 patients between 20 and 50 years old who had non-carious erosion lesions, shallow or medium in depth, located on the palatal and / or lingual, occlusal and / or incisal surfaces of two homologous teeth. The teeth of each patient were randomly divided into two groups (n = 20) according to the dentin surface treatment: 1) Control (without biomodification) and 2) NanoCsQ. Conditioning was carried out with 35% phosphoric acid, and then the cavity was washed. Biomodification with NanoCsQ was performed for 1 minute, and the surface was dried with absorbent paper. Then, the lesions were restored with an adhesive system (Tetric N-bond - Ivoclar) and composite resin (IPS - Ivoclar). The restorations were polished, and after 7 days, 6 months and 12 months were evaluated according to the modified United States Public Health Service (USPHS) criteria. The data were analyzed descriptively and also by the Friedman and Wilcoxon tests (α= 5%). During the analyzed period, 100% of the restorations received alpha scores for the criteria of marginal discoloration, marginal adaptation and postoperative sensitivity. For the retention criterion, 90% of the restorations had an alpha score and only 10% of the control restorations had a Charlie score at 12 months, with no significant difference between treatments (p = 0.432), periods (baseline, 6 months and 1 year) (p = 0.500) and treatment x period interaction (p = 0.126). In the photographic analysis, all restorations received an alpha score for the analyzed criteria. It was concluded that after one year, the biomodification of eroded dentin with chitosan nanoformulation containing green tea did not affect the performance of composite resin restoration.
 
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Publishing Date
2022-11-18
 
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