Interlocking reconstruction-mode stem-sideplates preserve at-risk hips with short residual proximal femora Journal Article


Authors: Christ, A. B.; Fujiwara, T.; Yakoub, M. A.; Healey, J. H.
Article Title: Interlocking reconstruction-mode stem-sideplates preserve at-risk hips with short residual proximal femora
Abstract: AIMS: We have evaluated the survivorship, outcomes, and failures of an interlocking, reconstruction-mode stem-sideplate implant used to preserve the native hip joint and achieve proximal fixation when there is little residual femur during large endoprosthetic reconstruction of the distal femur. METHODS: A total of 14 patients underwent primary or revision reconstruction of a large femoral defect with a short remaining proximal femur using an interlocking, reconstruction-mode stem-sideplate for fixation after oncological distal femoral and diaphyseal resections. The implant was attached to a standard endoprosthetic reconstruction system. The implant was attached to a standard endoprosthetic reconstruction system. None of the femoral revisions were amenable to standard cemented or uncemented stem fixation. Patient and disease characteristics, surgical history, final ambulatory status, and Musculoskeletal Tumor Society (MSTS) score were recorded. The percentage of proximal femur remaining was calculated from follow-up radiographs. RESULTS: All 14 at-risk native hip joints were preserved at a mean final follow-up of 6.0 years (SD 3.7), despite a short residual femur, often after proximal osteotomies through the lesser trochanter. Overall, 13 of 14 stems had long-term successful fixation. Eight patients required no reoperation. Three patients required reoperation due to implant-related issues, and three patients required reoperation for wound healing problems or infection. There were no dislocations or fractures. At final follow-up the mean MSTS score was 24.9 (SD 4.1). Nine patients required no ambulation aids, and only one had a Trendelenburg gait. CONCLUSION: This interlocking, reconstruction-mode stem-sideplate reliably preserves native hip joint anatomy and function after large femoral resection with a short remaining proximal femur, both in the primary and revision setting. This is particularly important for preventing or delaying total femoral arthroplasty in young patients after oncological reconstruction. Hip abductor strength and function could be maintained by this method, and the risk of dislocation eliminated. The success of this technique in this modest series should be verified in a larger collaborative study and will be of interest to revision surgeons and oncologists. Cite this article: Bone Joint J 2021;103-B(2):398-404.
Keywords: megaprosthesis; custom implant; distal femoral arthroplasty; reconstruction screw fixation; stem-sideplate; total femoral arthroplasty
Journal Title: The Bone & Joint Journal
Volume: 103-B
Issue: 2
ISSN: 2049-4394
Publisher: British Editorial Society of Bone and Joint Surgery  
Date Published: 2021-02-01
Start Page: 398
End Page: 404
Language: English
DOI: 10.1302/0301-620x.103b2.Bjj-2020-0654.R1
PUBMED: 33517739
PROVIDER: scopus
PMCID: PMC7926295
DOI/URL:
Notes: Article -- Export Date: 1 March 2021 -- Source: Scopus
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MSK Authors
  1. John H Healey
    483 Healey
  2. Alexander Bryant Christ
    7 Christ
  3. Mohamed Ahmed Ali Yakoub
    8 Yakoub