An in-vitro study of the fatigue resistance and structural integrity of different aesthetic posts.

Abstract

Aim: The aim of the study was to assess and determine the fatigue resistance of different fiber posts and to observe their ultrastructures through scanning electron microscopy (SEM). Objectives: To assess and compare the fatigue resistance of 4 different types of fiber posts, to analyse and compare the surface morphology using scanning electron microscopy (SEM) and to determine a correlation between the fatigue resistance exhibited by the different types of posts and their structural characteristics. Materials and Methods: Four types of aesthetic posts were selected for this study, namely: Radix Fiber Post (Dentsply Sirona, USA, zirconia glass fiber), ParaPost Fiber White (Coltene/Whaledent, NJ, USA, glass fiber), Edelweiss Composite Posts (Edelweiss Dentistry, Austria, hybrid glass) and GC Fiber Post (GC, Tokyo, Japan, glass fiber). For each group, the 15 largest posts available were used. For the fatigue testing 10 posts were used, the remaining 5 were used for processing in SEM evaluation.