A case of aseptic loosening after total knee replacement with porous-coated mega prosthesis despite progression of extra bone growth.

Ryota Miyamoto, Yasushi Goto, Toshitaka Fujito, Hirohito Abe, Yasuo Kunugiza

Abstract readCase Reports

In one paragraph

Article in Radiology case reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1citing papers in PubMed

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1 citing paper in PubMed.

Proximal femur replacement in oncologic lesion: hemiarthroplasty vs total hip arthroplasty-a multicentric retrospective study.Journal of orthopaedic surgery and research · 2025
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5 · Who and what money

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5 authors.

Ryota MiyamotoDepartment of Orthopaedics, Osaka International Cancer Institute, Osaka, Japan.

Yasushi GotoDepartment of Orthopaedic Surgery, Japan Community Health Care Organization Hoshigaoka Medical Center, Osaka, Japan.

Toshitaka FujitoDepartment of Orthopaedic Surgery, National Hospital Organization Osaka National Hospital, Osaka, Japan.

Hirohito AbeDepartment of Orthopaedic Surgery, Japan Community Health Care Organization Hoshigaoka Medical Center, Osaka, Japan.

Yasuo KunugizaDepartment of Orthopaedic Surgery, Japan Community Health Care Organization Hoshigaoka Medical Center, Osaka, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Total knee replacement with mega prosthesis for periprosthetic fractures after total knee arthroplasty is related to early functional recovery, but aseptic loosening of the implant has been a major reoperation factor in the long-term outcome of total knee replacement with mega prosthesis. Extracortical bone formation caused by bone-collar interface osteointegration may decrease the probability of aseptic loosening by promoting bone formation and improving bone-implant fixation. Here, we report a case of total knee replacement using mega prosthesis with porous-coated collar showing extra bone growth without osteointegration of prosthesis and leading to aseptic loosening.

Indexed as

Aseptic looseningExtracortical bone growthMegaprosthesisRadio lucent line

Identifiers

PMID39897751

DOI10.1016/j.radcr.2025.01.019

PMCPMC11786797

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