Surgeon-stratified periprosthetic fracture risk in a single-hospital cohort of 1531 uncemented ABG-II femoral stems at primary total hip arthroplasty

Kropivšek, Luka (author), Antolič, Vane (author), Mavčič, Blaž (author)

Purpose Late periprosthetic fracture risk with uncemented ABG-II femoral stems at primary total hip arthroplasty (THA) has been reported before, but single-hospital surgeon-stratified reports of this implant have never been published. We asked whether periprosthetic fracture rates of ABG-II femoral stems implanted at a single tertiary hospital depended on patients’ age, gender and the operating surgeon. Methods The study included 1531 consecutive primary ABG-II femoral stems implanted at a single tertiary hospital between January 1, 2012 and December 31, 2018. The Kaplan–Meier and Cox regression analyses were performed after 3.6–10.6 years of follow-up. Results In the cohort, we recorded 8 intraoperative, 22 early postoperative (within 90 days of implantation) and 26 late periprosthetic fractures (over 90 days postoperatively). The revision rate of ABG-II femoral stems was 5.1/100 component-years for early and 0.3/100 component-years for late periprosthetic fractures. The Kaplan–Meier cumulative probability of periprosthetic fracture was 2.1% at one, 2.3% at 2, 3.2% at 5, and 6.5% at 10 years after the implantation. Higher patient's age at operation was an independent risk factor of subsequent periprosthetic fracture (hazard ratio 1.07, 95% confidence interval 1.03–1.10; p < 0.01), regardless of the operating surgeon. Most of the fractured femora were Dorr type C (stovepipe). Conclusion The study presents the largest published ABG-II femoral stem cohort from a single hospital so far with 9291 component-years of observation. Periprosthetic fracture risk of ABG-II increased with patients’ age, had no variability between different surgeons, and was considerably higher from other uncemented femoral stems used at the same hospital.

• Language: English
• Keywords: total hip arthroplasty, periprosthetic fracture, cohort analysis, surgeon stratification
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: MF - Faculty of Medicine
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: Str. 1850-1857
• Numbering: Vol. 57, iss. 11
• PID: 20.500.12556/RUL-154725
• UDC: 616.7
• ISSN on article: 1998-3727
• DOI: 10.1007/s43465-023-00996-2
• COBISS.SI-ID: 186240771
• Publication date in RUL: 26.02.2024

Record is a part of a journal

• Title: Indian journal of orthopaedics
• Shortened title: Indian j. orthop.
• Publisher: Medknow Publications
• ISSN: 1998-3727
• COBISS.SI-ID: 520739097

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• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
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