Fiber sleeve impact on push-out bond strength of adjustable post system

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VAR E., KÜDEN C., Yoldas O.

BMC Oral Health, vol.25, no.1, 2025 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 25 Issue: 1
  • Publication Date: 2025
  • Doi Number: 10.1186/s12903-025-07058-z
  • Journal Name: BMC Oral Health
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CINAHL, EMBASE, MEDLINE, Directory of Open Access Journals
  • Keywords: Adjustable post, Bond strength, Fiber post, Mastication simulator, Sleeve
  • Çukurova University Affiliated: Yes

Abstract

Purpose: This study investigated the influence of the fiber sleeve on push-out bond strength (PBS), both with and without aging in a mastication simulator. Materials and methods: Sixty straight-rooted mandibular premolars were randomly divided into four groups (n = 15). Groups S and SMS included fiber sleeves and posts, while Groups P and PMS included posts only. Groups SMS and PMS 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 (α = 0.05). Results: Group S had the highest PBS, significantly surpassing Group P (P < 0.001). Aging significantly reduced PBS in sleeve groups (S vs. SMS,P = 0.029) Adhesive failure between dentin and cement was most common. Conclusion: The use of fiber sleeves significantly improved PBS; however, this enhancement diminished following aging procedures.