{
  "abstract": "Chronic pes calcaneus deformity alters sagittal-plane limb mechanics by anteriorly displacing the ground reaction force and may induce a persistent knee hyperextension moment. A possible distal-to-proximal deformity cascade that progressed to severe genu recurvatum and secondary knee osteoarthritis needing hinged total knee arthroplasty is complex and rarely described. The first patient is a 53-year-old woman presenting with a 25° recurvatum, while the second patient is a 73-year-old woman presenting with a 30° genu recurvatum secondary to untreated pes calcaneus. Both patients developed painful osteoarthrosis necessitating a rotating hinge knee arthroplasty. At 5 and 4 years of follow-up, respectively, they reported no pain or recurrence of deformity, and radiographic evaluation showed stable prostheses without evidence of loosening. We describe a possible distal-to-proximal deformity cascade associated with progressive genu recurvatum and secondary knee osteoarthritis requiring hinged knee arthroplasty. Rotating hinge arthroplasty has been used successfully in our study; however, further investigation is necessary to establish its long-term outcomes.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Bone and Joint Surgery, Fortis Hospital, Bengaluru, Karnataka, India."
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Narayan Hulse",
      "orcid": "0000-0002-5088-2561"
    },
    {
      "affs": [
        0
      ],
      "name": "Santhosh C Reddy"
    },
    {
      "affs": [
        0
      ],
      "name": "G G Charankumar"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a01466sregrgm.bib",
  "cited_by": 0,
  "doi": "10.13107/jocr.2026.v16.i11.8452",
  "fulltext_url": "https://europepmc.org/articles/PMC13740885",
  "id": "a01466sregrgm",
  "issns": [
    "2250-0685",
    "2321-3817"
  ],
  "landing_url": "https://europepmc.org/article/MED/42997114",
  "language": "eng",
  "licence": "CC-BY-NC",
  "licence_label": "CC BY-NC",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2746|Total Knee Arthroplasty Outcomes"
    ]
  ],
  "openalex": "W7225558361",
  "pdf_url": "https://europepmc.org/articles/PMC13740885?pdf=render",
  "pmcid": "PMC13740885",
  "pmid": "42997114",
  "published": "2026-11-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a01466sregrgm.ris",
  "sources": [
    {
      "first_seen": "2026-11-09T15:20:34Z",
      "native_id": "MED:42997114",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42997114"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2746|Total Knee Arthroplasty Outcomes",
      "subfield": "surgery"
    }
  ],
  "title": "Pes Calcaneus Leading to Genu Recurvatum: A Distal-to-Proximal Deformity Cascade Treated by Rotating Hinge Arthroplasty: Two Case Reports.",
  "title_text": "Pes Calcaneus Leading to Genu Recurvatum: A Distal-to-Proximal Deformity Cascade Treated by Rotating Hinge Arthroplasty: Two Case Reports.",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T15:20:34Z",
  "url": "https://research.draconitic.com/paper/a01466sregrgm",
  "venue": "Journal of orthopaedic case reports",
  "versions": []
}