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Periprosthetic femoral fracture type and location are influenced by the presence of an ipsilateral knee arthroplasty implant: A case-control study of 84 interprosthetic femoral fractures by Oliver Townsend; Sameer Jain; Jonathan N Lamb; Chloe E H Scott; Douglas G Dunlop; Hemant G Pandit is a Medicine article available to read on EtoBox.

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## Background: This multicentre case-control study compares vancouver classification system (vcs) grade and arbeitsgemeinschaft für osteosynthesefragen/orthopaedic trauma association (ao/ota) fracture type in interprosthetic femoral fractures (ipffs) between primary total hip arthroplasty (tha) and ipsilateral total knee arthroplasty (tka) to periprosthetic femoral fracture (pff) without ipsilateral tka. ## Methods: Data were collected following institutional approval. eighty-four ipffs were assessed for vcs grade and ao/ota type. each ipff case (84) was matched to five pff controls (360) by age, gender and stem fixation philosophy (smd<0.1). vcs grade and ao/ota type were compared between the ipff and pff groups using weighted proportions and medians. ## Results: Median (iqr) age of ipff patients was 81.75 (76.57-85.33) years and 61 (72.6%) were female. the commonest vcs grade was b1 (34, 40.5%). the commonest ao/ota type was spiral (51.8% of vcs b fractures; 50.0% of vcs c fractures). a greater proportion of fractures occurred distal to the stem in ipff patients versus pff patients (33.3% versus 18.2%, p = 0.003). vcs grade was significantly different between groups (p = 0.015).

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Author

Oliver Townsend; Sameer Jain; Jonathan N Lamb; Chloe E H Scott; Douglas G Dunlop; Hemant G Pandit

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Medicine (Health Sciences)