Examinando por Materia "Resina microhíbrida"

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    Comparison of the flexural strength of a nanohybrid resin and a Bulk Fill type resin. In Vitro Study. Lima - Peru 2021.
    (Universidad Privada Norbert Wiener, 2022-05-05) Cruz Huaman, Iris; Vásquez Rodrigo, Hernán
    Two resins were used, a microhybrid (Filtek™ Z250XT – 3M Espe) and a bulk fill type (Filtek™ Z250XT – 3M Espe). These resins were used to form resin bars of 60 mm in length, 10 mm in width, and 2 and 4 mm in thickness. The resin bars were formed with the help of two metal molds of the specified dimensions, differing only in thickness, one mold with 2 mm thickness and the other with 4 mm thickness. In the 2 mm thickness mold, the resin bars were formed with 2 mm increments until the resin bar was completed, while in the 4 mm thickness mold, the resin bars were formed with 4 mm increments. Once the resin bars were formed, they were taken to the mechanical testing laboratory for the flexural strength test, where each resin bar was individually placed on a metal structure with two equidistant supports at the base. A metal piece was then lowered at the center of the resin bar to test its flexion under compressive load, advancing at 1 mm/min until the material fractured, with data recorded electronically by the same equipment. Results: The results showed that the flexural strength of the nanohybrid resin with 4 mm increments was 113.89 ± 27.94 Megapascals. This was followed by the bulk fill resin with 2 mm increments (109.69 ± 75.60 Megapascals), then the nanohybrid resin with 2 mm increments (93.87 ± 15.97 Megapascals), and lastly, the bulk fill resin with 4 mm increments (75.60 ± 5.88 Megapascals). Conclusion: The highest flexural strength of the resins was found in the microhybrid resin Filtek™ Z250XT with 4 mm increments, followed by the flexural strength of the Filtek™ Bulk Fill resin with 2 mm increments. This was followed by the flexural strength of the Filtek™ Z250XT resin with 2 mm increments, and lastly, the Filtek™ Bulk Fill resin with 4 mm increments.