{
  "abstract": "Purpose\n\nTo evaluate the internal fit at the implant-abutment interface of zirconia and cobalt-chromium abutments fabricated using different techniques by micro-computed tomography (micro-CT).Methods\n\nTwenty screw-retained abutments were divided into 4 groups (n = 5): milled zirconia (ZrCAD), milled cobalt-chromium (Co-CrMill), laser-sintered cobalt-chromium (Co-CrLS), and cast cobalt-chromium (Co-CrCL). Specimens were subjected to cyclic loading (300,000 cycles, 200 N) and thermocycling (10000 cycles, 5 to 50 °C). Internal fit was assessed by micro-CT at 3 regions and 3 spatial planes (180 measurements). Data were analyzed with Kruskal-Wallis and Bonferroni-Holm tests (α = 0.05).Results\n\nSignificant differences in internal fit were found (p < 0.05). Co-CrLS showed the highest internal gap values (26.75 ± 7.05 μm, 87.00 ± 3.26 μm, 86.50 ± 5.76 μm). Significant differences were observed between Co-CrLS and ZrCAD (Region 1, p = 0.003), Co-CrMill (Regions 1 and 2, p = 0.003-0.004), and Co-CrCL (Regions 1 and 3, p = 0.003-0.001). Total values also differed between Co-CrMill and Co-CrLS (p = 0.012) and Co-CrCL and Co-CrLS (p = 0.002).Conclusions\n\nInternal fit differed among the evaluated workflows. Laser-sintered cobalt-chromium abutments showed the least favorable adaptation, whereas milled and cast cobalt-chromium showed lower gap values; zirconia showed intermediate descriptive values. The clinical significance of these differences remains uncertain.Clinical trial number\n\nNot applicable.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Conservative Dentistry and Prosthodontics, Faculty of Dentistry, Complutense University of Madrid, Madrid, Spain.",
    "Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.",
    "Complutense University of Madrid, Ramon y Cajal Research Institute (IRYCIS), Madrid, Spain.",
    "Department of Research Analytics, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, Saveetha University, Chennai, India.",
    "Departament of Radiology, Rehabilitation and Physiotherapy, Faculty of Medicine, Complutense University of Madrid, Madrid, Spain.",
    "Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland. guelce.cakmak@unibe.ch.",
    "Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Corporate Member of Freie Universität Berlin and Humboldt- Universität zu Berlin, Charité-Universitätsmedizin Berlin, Berlin, Germany. guelce.cakmak@unibe.ch.",
    "Department of Prosthodontics, Faculty of Dentistry, Biruni University, Istanbul, Turkey. guelce.cakmak@unibe.ch.",
    "Shanghai Perio-Implant Innovation Center, Institute of Integrated Oral, Craniofacial and Sensory Research, Shanghai Ninth People's Hospital, College of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, China.",
    "Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Pedro Molinero-Mourelle"
    },
    {
      "affs": [
        0,
        3
      ],
      "name": "Seyed Ali Mosaddad"
    },
    {
      "affs": [
        0
      ],
      "name": "Rocio Cascos-Sanchez"
    },
    {
      "affs": [
        4
      ],
      "name": "Margarita Chevalier Del Río"
    },
    {
      "affs": [
        5,
        6,
        7
      ],
      "name": "Gülce Çakmak"
    },
    {
      "affs": [
        8,
        9
      ],
      "name": "Andrea Roccuzzo"
    },
    {
      "affs": [
        0
      ],
      "name": "Miguel Gómez-Polo"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4m5v9dw93baj2.bib",
  "cited_by": 0,
  "doi": "10.1186/s40729-026-00718-x",
  "fulltext_url": "https://europepmc.org/articles/PMC13680598",
  "id": "4m5v9dw93baj2",
  "issns": [
    "2198-4034"
  ],
  "landing_url": "https://europepmc.org/article/MED/42895618",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "R"
    ],
    [
      "lcc",
      "RK1-715"
    ],
    [
      "openalex",
      "3504|Dental Implant Techniques and Outcomes"
    ]
  ],
  "openalex": "W7221717676",
  "pdf_url": "https://europepmc.org/articles/PMC13680598?pdf=render",
  "pmcid": "PMC13680598",
  "pmid": "42895618",
  "published": "2026-10-13",
  "publisher": "SpringerOpen",
  "ris": "https://research.draconitic.com/paper/4m5v9dw93baj2.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:33Z",
      "native_id": "MED:42895618",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42895618"
    },
    {
      "first_seen": "2026-10-30T13:46:06Z",
      "native_id": "fb9e57349861467fa36747d0399e1243",
      "source": "doaj",
      "url": "https://doi.org/10.1186/s40729-026-00718-x"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "lcc:R",
      "subfield": "general"
    }
  ],
  "title": "Internal fit of cobalt-chromium and zirconia implant abutments fabricated using different techniques: a micro-computed tomography study.",
  "title_text": "Internal fit of cobalt-chromium and zirconia implant abutments fabricated using different techniques: a micro-computed tomography study.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:46:06Z",
  "url": "https://research.draconitic.com/paper/4m5v9dw93baj2",
  "venue": "International journal of implant dentistry",
  "versions": []
}