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

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

Abstract

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.

Keywords

total hip arthroplasty;periprosthetic fracture;cohort analysis;

Data

Language:	English
Year of publishing:	2023
Typology:	1.01 - Original Scientific Article
Organization:	UL MF - Faculty of Medicine
UDC:	616.7
COBISS:	186240771
ISSN:	1998-3727
Views:	22
Downloads:	5
Average score:	0 (0 votes)
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Other data

Type (COBISS):	Article
Pages:	str. 1850-1857
Volume:	ǂVol. ǂ57
Issue:	ǂno. ǂ11
Chronology:	2023
DOI:	10.1007/s43465-023-00996-2
ID:	23010054