Purpose: To evaluate the failure patterns of teeth restored with both cast metal and fiber posts after fatigue cycling. Materials and Methods: Thirty-five crownless human teeth subdivided into 5 groups were subjected to 2 X 10(6) 100-N fatigue cycles at 8 Hz under 37 degrees C water. Results: No root fatigue fractures were recorded. High microleakage values were found in specimens that survived fatigue. No statistically significant relationships were found for fatigue (P > .4), fracture strength (P > .8), and microleakage (P > 1). Conclusions: Cast-metal and fiber posts undergo insidious microscopic adhesive failures at similar levels. Increasing the post diameter and/or post stiffness could improve the core stabilization.
Fatigue resistance of restored endodontically treated teeth: A multiparametric analysis
PALANO, Antimo;
2006-01-01
Abstract
Purpose: To evaluate the failure patterns of teeth restored with both cast metal and fiber posts after fatigue cycling. Materials and Methods: Thirty-five crownless human teeth subdivided into 5 groups were subjected to 2 X 10(6) 100-N fatigue cycles at 8 Hz under 37 degrees C water. Results: No root fatigue fractures were recorded. High microleakage values were found in specimens that survived fatigue. No statistically significant relationships were found for fatigue (P > .4), fracture strength (P > .8), and microleakage (P > 1). Conclusions: Cast-metal and fiber posts undergo insidious microscopic adhesive failures at similar levels. Increasing the post diameter and/or post stiffness could improve the core stabilization.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
