{
  "abstract": "Background\n\nThe transverse acetabular ligament (TAL) is used as an intraoperative landmark during total hip arthroplasty (THA); however, it remains unclear whether TAL-guided radiographic anteversion (TAL-RA) aligns with contemporary hip-spine classification and combined anteversion (CA) target ranges.Methods\n\nWe prospectively enrolled 132 patients (140 hips) undergoing primary posterior-approach THA. The TAL was identifiable in 117 hips (83.6%) and used for TAL-RA measurement only. TAL-RA was measured at a fixed radiographic inclination of 40° using augmented-reality navigation and standardized for pelvic tilt. The primary analysis assessed concordance with the hip-spine 1A target range (20°-25°) and a prespecified ±5° margin; secondary analyses evaluated other hip-spine categories and CA targets (40°-60°).Results\n\nIn the hip-spine 1A group, 15/70 hips (21.4%) fell within the 20°-25° target, increasing to 46/70 (65.7%) with a ±5° margin. In the 2A group, 16.1% fell within the target range, increasing to 61.3% with ±5°. Exploratory analyses of the small 1B and 2B subgroups showed target attainment of 27.3% and 20.0%, respectively. The mean CA was 49.7° and 56.4% of the hips fell within the 40°-60° target range.Conclusions\n\nTAL-RA showed wide interpatient variability, limited concordance with hip-spine target ranges, and moderate concordance with a commonly used CA target range. These findings suggest that the TAL may be better regarded as an adjunctive anatomic landmark rather than a stand-alone determinant of cup anteversion. The clinical implications of this discordance remain uncertain.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Orthopaedic Surgery, Nijigaoka Hospital, Nagasaki, Japan."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Kyosuke Kobayashi"
    },
    {
      "affs": [
        0
      ],
      "name": "Kenichi Kidera"
    },
    {
      "affs": [
        0
      ],
      "name": "Syuta Yamada"
    },
    {
      "affs": [
        0
      ],
      "name": "Tatsuya Fukushima"
    },
    {
      "affs": [
        0
      ],
      "name": "Akira Hozumi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a7bp4m1dsds00.bib",
  "cited_by": 0,
  "doi": "10.1016/j.artd.2026.102188",
  "fulltext_url": "https://europepmc.org/articles/PMC13694756",
  "id": "a7bp4m1dsds00",
  "issns": [
    "2352-3441"
  ],
  "landing_url": "https://europepmc.org/article/MED/42927130",
  "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": [
    [
      "openalex",
      "2746|Orthopaedic implants and arthroplasty"
    ]
  ],
  "openalex": "W7222191824",
  "pdf_url": "https://europepmc.org/articles/PMC13694756?pdf=render",
  "pmcid": "PMC13694756",
  "pmid": "42927130",
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a7bp4m1dsds00.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:18Z",
      "native_id": "MED:42927130",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42927130"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2746|Orthopaedic implants and arthroplasty",
      "subfield": "surgery"
    }
  ],
  "title": "Intraoperative Transverse Acetabular Ligament-Guided Radiographic Anteversion: Concordance With Hip-Spine Targets and Combined Anteversion.",
  "title_text": "Intraoperative Transverse Acetabular Ligament-Guided Radiographic Anteversion: Concordance With Hip-Spine Targets and Combined Anteversion.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:21:18Z",
  "url": "https://research.draconitic.com/paper/a7bp4m1dsds00",
  "venue": "Arthroplasty today",
  "versions": []
}