Comparative Analysis of Different Methods of Marginal Microleakage Evaluation for Restored Teeth by Composite Resin
DOI:
https://doi.org/10.17921/2447-8938.2024v26n4p221-225Resumo
Abstract
Polymerization contraction of composite resin can cause marginal microleakage resulting in hypersensitivity, discoloration, secondary caries, pulpal involvement, and restoration failure. Different methods are used to assess these leaks. This study compared two methods of assessing marginal infiltration using dye penetration. Class V preparations were made in 45 fragments of bovine teeth, which were restored in composite resin. After finishing and polishing, the samples were randomized into 3 groups: GI (control, no sealing); GII (Fortify surface sealant (Bisco, Schaumburg, IL, United States of America); GIII (Biscover surface sealant Bisco, Schaumburg, IL, United States of America). The restorations were thermocycled and immersed in 2% methylene blue. For the qualitative infiltration assessment, the samples were analyzed under a stereomicroscope and classified between 0 and 3. The quantitative evaluation was carried out by analyzing the absorbance of the solution obtained by grinding the sample. The qualitative results were analyzed using the Kappa and Kruskal-Wallis tests, and the quantitative results using the Tukey test. Group II and III showed less marginal infiltration than the Control Group, although they did not differ statistically. It was concluded that there was no difference between the two methods tested.
Keywords: Dental Leakage. Dental Bonding. Composite Resins. Adhesiveness. Dental Sealants.
Resumo
A contração de polimerização da resina composta pode causar microinfiltração marginal, resultando em hipersensibilidade, descoloração, cáries secundárias, comprometimento pulpar e insucesso da restauração. Este estudo comparou dois métodos de avaliação da infiltração marginal através da penetração de corante. Foram realizados preparos classe V em 45 fragmentos de dentes bovinos que foram restaurados em resina composta. Após o acabamento e polimento, as amostras foram randomizadas em 3 grupos: GI (controle, sem selamento); GII (selante de superfície Fortify (Bisco, Schaumburg, IL, Estados Unidos da América); GIII (selante de superfície Biscover Bisco, Schaumburg, IL, Estados Unidos da América). As restaurações foram termocicladas e imersas em azul de metileno a 2%. Para a avaliação qualitativa da infiltração, as amostras foram analisadas sob um estereomicroscópio e classificadas entre 0 e 3. A avaliação quantitativa foi realizada através da análise da absorbância da solução obtida pela trituração da amostra. Os resultados qualitativos foram analisados pelos testes de Kappa e Kruskal-Wallis, e os quantitativos pelo teste de Tukey. Os grupos II e III apresentaram menor infiltração marginal do que o grupo controle, embora não diferissem estatisticamente entre si. Concluiu-se que não houve diferença entre os dois métodos testados.
Palavras-chave: Infiltração Dentária. Adesividade Dentária. Resina Composta. Adesividade. Selantes Dentários.
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