info:eu-repo/semantics/article
Margin microfiltration in class II cavity restored with nano hybrid resins vs nano hybrid resins bulk fill. Study in vitro
Microfiltración marginal en cavidades clase II restauradas con resinas nano híbridas vs resinas nano hibridas bulk fill. Estudio in vitro
Registro en:
10.29166/odontologia.vol22.n1.2020-55-65
Autor
Jinez Zuñiga, Paulina Alexandra
García Merino, Iván Ricardo
Silva Silva, Javier Oswaldo
Institución
Resumen
Among postoperative complications, microfiltration is frequent when direct restorations with resin are performed in the posterior sector, especially in the deep part of the proximal boxes. Objective: To evaluate by means of a stereo microscope if Bulk Fill nano-hybrid resins have a lower degree of marginal microfiltration in class II cavities than conventional nano-hybrid resins. Materials and methods: Standardized Black class II cavities of 30 premolars extracted by orthodontic indication were randomly restored in two groups (n = 15). The first group was restored with Tetric EvoCeram® nano hybrid resin (Ivoclar) with 2mm increments and the second group with Bulk Fill (ivoclar) nano hybrid resin with 4mm increments. All samples were subjected to thermocycling for 5000 cycles and subsequently immersed in methylene blue for 24 hours. Finally, a sagittal section was performed uniformly and the depth of marginal microfiltration at the base of the proximal box was evaluated by means of a stereo microscope and the analysis of two blind observers. Results: The two groups presented marginal microfiltration, in varying degrees. Conclusion: Although the cavities restored with Bulk Fill nano-hybrid resin presented lower values, the Mann Whitney test resulted in the existing differences not being statistically significant (p = 0.181). Entre las complicaciones posoperatorias, es frecuente la microfiltración cuando se realizan restauraciones directas con resina en el sector posterior, sobre todo en la parte profunda de las cajas proximales. Objetivo: Evaluar por medio de un estéreo microscopio si resinas nano híbridas Bulk Fill presentan menor grado de microfiltración marginal en cavidades clase II que resinas nano híbridas convencionales. Materiales y métodos: Cavidades estandarizadas clase II de Black de 30 premolares extraídos por indicación ortodóntica fueron restauradas aleatoriamente en dos grupos (n= 15). El primer grupo fue restaurado con resina nano híbrida Tetric EvoCeram® (Ivoclar) con incrementos de 2mm y el segundo grupo con resina nano híbridas Bulk Fill (ivoclar) con incrementos de 4 mm. Todas las muestras fueron sometidas a termociclado durante 5000 ciclos y posteriormente fueron sumergidas en azul de metileno durante 24 horas. Finalmente, se realizó un corte sagital de manera uniforme y se evaluó la profundidad de la microfiltración marginal en la base de la caja proximal por medio de un estéreo microscopio y el análisis de dos observadores ciegos. Resultados: Los dos grupos presentaron microfiltración marginal, en distintos grados. Conclusión: aunque las cavidades restauradas con resina nano híbridas Bulk Fill presentaron valores menores, la prueba de Mann Whitney dio como resultado que las diferencias existentes no son estadísticamente significativas (p = 0,181).
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