Examinando por Materia "Resistencia a la fatiga"

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    Fatigue resistance of exact fiberglass posts - angelus, white post, angelus reforpost, in vitro study – Lima 2020.
    (Universidad Privada Norbert Wiener, 2020-12-19) Dilas Teran, Santos; Chanamé Marín, Ann Rosemary
    The objective of this study was to determine the best fatigue resistance of the fiberglass posts Exacto - Angelus, White Post, and Reforpost by Ángelus in an in vitro study. Each post was evaluated using an optical microscope and measured in length and diameter with a 200 mm digital vernier caliper. A total of 60 fiberglass posts were divided into three groups: Group 1: Exacto – Angelus, Group 2: White Post, and Group 3: Reforpost by Angelus. These were then subjected to a linear cyclic load fatigue machine HTL Certificate – 021 with a 1.6 mm diameter punch, a free span of 7 mm, applying a load at 90° and a frequency of 5.84 Hz at 20 N. The results showed that the Exacto – Angelus fiberglass post achieved an average fatigue resistance of 38,692.5 cycles with a mean time of 110.55 minutes, while the White Post had an average fatigue resistance of 31,921.25 cycles with a time of 91.225 minutes, and the Reforpost by Angelus had an average fatigue resistance of 25,970 cycles at 74.2 minutes. It was concluded that the Exacto – Angelus post showed the highest fatigue resistance time.