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Fiber sleeve impact on push-out bond strength of adjustable post system
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Journal Article
Fiber sleeve impact on push-out bond strength of adjustable post system
2025
Overview
This study investigated the influence of the fiber sleeve on push-out bond strength (PBS), both with and without aging in a mastication simulator. Sixty straight-rooted mandibular premolars were randomly divided into four groups (n = 15). Groups S and S.sub.MS included fiber sleeves and posts, while Groups P and P.sub.MS included posts only. Groups S.sub.MS and P.sub.MS underwent aging in a mastication simulator (50 N load, 240,000 cycles). Specimens were sectioned into 1 mm slices (coronal, middle, apical thirds), and PBS testing was performed using a universal testing machine. Failure modes were analyzed under 40× magnification. Statistical analysis used one-way ANOVA and Tukey tests ([alpha] = 0.05). Group S had the highest PBS, significantly surpassing Group P (P < 0.001). Aging significantly reduced PBS in sleeve groups (S vs. S.sub.MS,P = 0.029) Adhesive failure between dentin and cement was most common. The use of fiber sleeves significantly improved PBS; however, this enhancement diminished following aging procedures.
Publisher
BioMed Central Ltd
Subject
