Microdureza según superficie, distancia y tiempo de fotopolimerización de una resina bulk-Fill: estudio in vitro
DOI:
https://doi.org/10.15517/h2wz7d17Palabras clave:
Resinas compuestas; Luces de curación dental; Materiales dentales; Dureza; Polimerización; Factores de tiempo.Resumen
Comparar la microdureza de Vickers (VHN) según la superficie, distancia y el tiempo de fotopolimerización (FP) de Tetric® N-Ceram Bulk Fill (TNCBF). Estudio in vitro realizado en 80 muestras cilíndricas (4 mm×4 mm) distribuidas al azar en 8 grupos según distancia (0 y 3 mm) y tiempo (10, 20, 30, 40 s) de FP LED 1470 mW/cm2. La profundidad de curado fue adecuada cuando el ratio de VHN triplicadas (Kg/mm²) entre superficies inferior/superior fue>0,8. El análisis estadístico se realizó con la prueba ANOVA de tres vías con post hoc de Tukey y Tamhane (p<0,05). El efecto en la VHN fue altamente significativo al análisis individual de la superficie, tiempo y distancia de FP y por interacción tiempo × distancia de FP (p<0,001). El promedio de profundidad de curado superó el 80% de VHN independientemente de la distancia y tiempo de FP. La VHN fue mayor a una distancia de 0 mm en comparación a 3 mm con 10 y 20 s de FP independientemente de la superficie (p<0,001). La VHN fue similar en todos los tiempos con 0 mm de distancia de FP (p ≥ 0,377) y aumentó a partir de 20 s con 3 mm de distancia de FP (p≤0,001). La superficie, distancia y tiempo de FP afectaron la dureza de TNCBF lo que puede repercutir en su rendimiento clínico. La profundidad de curado mediante VHN fueron favorables con la fotopolimerización con 20 s a una distancia de 0 mm para un espesor de 4 mm de TNCBF.
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Derechos de autor 2026 María José Loayza-Gallegos, Gino Hernan Vidalón-Romo, Julissa Amparo Dulanto-Vargas.
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