{
  "abstract": "Objectives: In this study, we aimed to evaluate the effect of post design on the push-out bond strength (PBS) of self-adhesive resin cement in simulated flared root canals. Materials and Methods: A total of 135 specimens simulating flared single root canals were fabricated using standardized 3D-printed resin (FREEPRINT® CROWN; Detax GmbH, Ettlingen, Germany) and allocated into three groups: single, double, and customized glass fiber-reinforced posts (Pillar Fiber Post, TiaDent, TX, USA). All specimens were cemented using self-adhesive resin cement (Rely XTM U200, 3M ESPE, MN, USA). The specimens were then sectioned perpendicular to the long axis into coronal, middle, and apical slices, each measuring 3 mm. After thermocycling, they were tested for their push-out bond strength. Failure modes were analyzed using stereomicroscopy. A statistical analysis was completed for PBS data using a two-way ANOVA test, and failure modes were analyzed using a Chi-square test at a significance level of α = 0.05. Results: We observed statistically significant differences in the PBS between test groups (p = 0.044*). Double-post specimens exhibited the highest PBS values at the coronal section (8.26 ± 1.54 MPa), followed by the middle section (7.77 ± 1.73 MPa). Across all root sections, the PBS of double posts (7.58 ± 2.07 MPa) significantly outperformed customized (6.76 ± 1.15 MPa) and single-post (6.73 ± 1.75 MPa) groups (p = 0.029*). The coronal third (7.44 ± 1.54 MPa) consistently showed higher PBS compared to the middle (7.15 ± 1.64 MPa) and apical (6.49 ± 1.90 MPa) thirds (p = 0.027*). Failure mode analysis revealed that customized posts predominantly failed at the post-adhesive interface, whereas double posts showed a mix of adhesive failures and single posts demonstrated more adhesive failures at the canal walls. Conclusions: The use of double fiber posts significantly enhances push-out bond strength in flared canals compared to single or customized posts. Relining techniques improved canal adaptation, but the performance here did not surpass that of double-post configurations. Clinically, the double-post approach may present a simple, practical and effective alternative to improve the bond strength of fiber-reinforced posts for flared root canal systems.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia",
    "Advanced Technology Dental Research Laboratory (ATDRL), Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi Arabia",
    "Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA",
    "Saudi Board Residency Program, Department of Pediatric Dentistry, King Abdullah Medical Complex, Saudi Commission for Health Specialties (SCFHS), Jeddah 11614, Saudi Arabia",
    "Oral and Maxillofacial Prosthodontics Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Maher S. Hajjaj",
      "orcid": "0000-0002-1554-1008"
    },
    {
      "affs": [
        2
      ],
      "name": "Lyan Y. Qari"
    },
    {
      "affs": [
        3
      ],
      "name": "Maram A. AlKenani"
    },
    {
      "affs": [
        4
      ],
      "name": "Anhar I. Basunbul",
      "orcid": "0000-0001-6075-9930"
    },
    {
      "affs": [
        4
      ],
      "name": "Dalea M. Bukhary"
    },
    {
      "affs": [
        0
      ],
      "name": "Abeer K. Tashkandi",
      "orcid": "0000-0003-0495-2415"
    },
    {
      "affs": [
        0
      ],
      "name": "Afnan O. Al-Zain",
      "orcid": "0000-0002-0413-8387"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Hanin E. Yeslam",
      "orcid": "0000-0001-5906-8382"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bdzqwz9g4kbk1.bib",
  "cited_by": 0,
  "doi": "10.3390/polym18212641",
  "fulltext_url": null,
  "id": "bdzqwz9g4kbk1",
  "issns": [
    "2073-4360"
  ],
  "landing_url": "https://www.mdpi.com/2073-4360/18/21/2641",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3505|Dental materials and restorations"
    ]
  ],
  "openalex": "W7223653303",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-25",
  "publisher": "MDPI AG",
  "ris": "https://research.draconitic.com/paper/bdzqwz9g4kbk1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:44Z",
      "native_id": "10.3390/polym18212641",
      "source": "crossref",
      "url": "https://www.mdpi.com/2073-4360/18/21/2641"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "issn:2073-4360",
      "subfield": "materials-polymers"
    }
  ],
  "title": "The Effect of Prefabricated vs Custom Fiber-Reinforced Posts on the Push-Out Bond Strength of Self-Adhesive Resin Cement in Simulated Flared Root Canals: An in Vitro Study",
  "title_text": "The Effect of Prefabricated vs Custom Fiber-Reinforced Posts on the Push-Out Bond Strength of Self-Adhesive Resin Cement in Simulated Flared Root Canals: An in Vitro Study",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:44Z",
  "url": "https://research.draconitic.com/paper/bdzqwz9g4kbk1",
  "venue": "Polymers",
  "versions": []
}