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ISSN 1659-1046 (Impreso)
Odovtos - International Journal of Dental Sciences

2021, Número 2

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Odovtos-Int J Dent Sc 2021; 23 (2)


Análisis del comportamiento mecánico y efecto de la fatiga cíclica en la interface implante-pilar

Germán SR, Ortiz MM, Sánchez RP, Zavala AN, Romo RGF

Idioma: Ingles.
Referencias bibliográficas: 40
Paginas: 104-114
Archivo PDF: 621.27 Kb.


RESUMEN

Propósito: El sellado de la interface de la conexión implante-pilar es esencial para el éxito a largo plazo de la restauración implantosoportada. El objetivo de este estudio fue analizar el comportamiento mecánico y el efecto de la fatiga cíclica antes y después en el sellado de la conexión implante-pilar de acuerdo a la ténica de fabricación del pilar. Materiales y Métodos: Pilares mecanizados de titanio (DENTIS), pilares calcinables colados con aleación Niquel-Cromo (VeraBond II) y pilares fresados de Zirconia (Zirkonzahn) fueron evaluados. Los implantes y pilares atornillados se sometieron a una carga de 133 N a una frecuencia de 19.1 Hz durante 200 000 ciclos. El microgap fue medido con el Microscopio Electrónico de Barrido y la distribución del esfuerzo de compresión por el método tridimensional de Elemento Finito (EF). Los valores del microgap de los pilares mecanizados fueron de 1.62µm y 1.92µm, en los pilares calcinables fue de 14.14µm y 20.15µm, y los pilares fresados fue de 14.18µm y 28.44 µm antes y después de la fatiga cíclica, respectivamente. Los pilares calcinables y lo mecanizados mostraron diferencia estadísticamente significativa antes y después de la fatiga cíclica (p≤0.05). El análisis por EF mostró que las áreas críticas del esfuerzo de compresión estaban localizadas en la conexión implante-pilar, aumentando en los pilares calcinables y disminuyendo en los pilares fresados y en los mecanizados. Conclusión: La fatiga cíclica ejerce un efecto sobre las dimensiones del microgap en la interface implante-pilar antes y después de la carga cíclica; este microgap depende del tipo de material y de la técnica de fabricación del pilar.


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