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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Comparación in vitro de la estabilidad cromática de dos marcas de resinas bulk fill sometidas a diferentes sustancias pigmentantes

Salas Cusihuaman, Nancy Yudith, Castro Leyva, Iris Lucero 03 December 2018 (has links)
Materiales y métodos : Se evaluaron 60 discos de resina (6 mm de diámetro y 4 mm de altura) de cada marca: FiltekTM Bulk Fill -3M-ESPE y Tetric N-Ceram® Bulk Fill Ivoclar-Vivadent, divididas en 4 grupos según sustancias pigmentantes, chicha morada, té verde, té de coca y agua destilada (Grupo control) por 14 días. Los especímenes fueron inmersos en 20 ml de sustancias diariamente a temperatura de 37C±5°. La evaluación del color se realizó a las 24 horas, 7 y 14 días, utilizando un espectrofotómetro Vita Easyshade® Advance 4.0, para hallar los valores de ΔE, L, C, H, a* y b*. Se utilizó la prueba de Kruskal Wallis para comparar los valores de la estabilidad cromática. Resultados : La mayor variación de color fue presentada por la resina Tetric N-Ceram®, al ser sumergida en todas las sustancias pigmentantes y todos los intervalos de tiempo. Al comparar ΔE se observo que la resina FiltekTM presentó 11.39±1.81, 8.47±2.14 y 7.90±1.81 y la resina Tetric N-Ceram® presentó 9.29±1.29, 5.58±1.96 y 4.39±1.59 siendo sometidas en chicha morada, té verde y té de coca. En la evaluación de la luminosidad se observó que la resina FiltekTM presentó 63.06±.75, 61.27±1.55 y 61.27±2.19 y la resina Tetric N-Ceram® presentó 64.79±3.32, 68.44±.86 y 67.51±1.11 cuando fueron sumergidas en las sustancias pigmentantes. / Objective: To compare in vitro the color stability of two Bulk Fill resin composites (FiltekTM Bulk Fill -3M-ESPE, Tetric N-Ceram® Bulk Fill) exposed to different pigmented beverages : chicha morada, green tea, coca tea. Material and methods: 60 composite discs were evaluated (6 mm in diameter and 4 mm in height) of the brands : FiltekTM Bulk Fill -3M-ESPE y Tetric N-Ceram® Bulk Fill Ivoclar-Vivadent, divided in 4 groups according to the pigmented beverages, chicha morada, green tea, coca tea and destilled water (control group) for 14 days. The samples were immersed in 20 ml of the substances daily at a temperature of 37C±5°. The color tests were done after 24 hours, 7 and 14 days, using a Vita Easyshade® Advance 4.0 spectrophotometer, to obtain the ΔE, L, C, H, a* y b* data. The Kruskal Wallis test was used to compare the chromatic stability values. Results: The biggest variation of color was in the Tetric N-Ceram® composite, being submerged in every beverage and in every time range. When comparing ΔE it was observed that the FiltekTM composite obtained 11.39±1.81, 8.47±2.14 and 7.90±1.81 and the Tetric N-Ceram® obtained 9.29±1.29, 5.58±1.96 and 4.39±1.59, being exposed to chicha morada, green tea and coca tea. In the luminosity test it was observed that the FiltekTM had results of 63.06±.75, 61.27±1.55 and 61.27±2.19 and the Tetric N-Ceram® composite obtained 64.79±3.32, 68.44±.86 y 67.51±1.11 when the discs were submerged in the pigmented beverages. / Tesis

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