Magdalena M Gilg1, Christian W Zeller2, Lukas Leitner1, Andreas Leithner1, Gerold Labek3, Patrick Sadoghi4. 1. Department of Orthopedic Surgery, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria. 2. Department of Trauma Surgery, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, 93042, Regensburg, Germany. 3. Department of Orthopedic Surgery, Medical University of Innsbruck, Anichstrasse 35, 6020, Innsbruck, Austria. 4. Department of Orthopedic Surgery, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria. patrick.sadoghi@medunigraz.at.
Abstract
PURPOSE: This study aimed to evaluate the incidence of "implant" fractures after knee arthroplasty using clinical literature and worldwide arthroplasty registers. The hypothesis was that register datasets report higher rates of these rare complications than clinical studies. METHODS: Calculations were based on the pooled incidence of revision operations after fractures of knee arthroplasties, comparing clinical studies published in MEDLINE-listed journals and annual reports from worldwide arthroplasty registers in a structured literature analysis based on a standardized methodology. RESULTS: Twelve clinical studies and datasets from six worldwide registers were included. Rates of fractures of knee arthroplasties were reported from 0.2 to 2.5 % in clinical studies versus 0.02-0.17 % in worldwide arthroplasty registers. CONCLUSIONS: Fractures of knee arthroplasty systems are rare complications, with clinical studies showing higher incidence rates than worldwide arthroplasty registries. Unicompartmental knee arthroplasty (UKA) implanted before 2000, constrained primary or revision constrained total knee arthroplasties, and patellar replacements showed the highest incidence of implant fracture. The results of this analysis can help clinicians to counsel patients on potential complications following knee arthroplasty. LEVEL OF EVIDENCE: III.
PURPOSE: This study aimed to evaluate the incidence of "implant" fractures after knee arthroplasty using clinical literature and worldwide arthroplasty registers. The hypothesis was that register datasets report higher rates of these rare complications than clinical studies. METHODS: Calculations were based on the pooled incidence of revision operations after fractures of knee arthroplasties, comparing clinical studies published in MEDLINE-listed journals and annual reports from worldwide arthroplasty registers in a structured literature analysis based on a standardized methodology. RESULTS: Twelve clinical studies and datasets from six worldwide registers were included. Rates of fractures of knee arthroplasties were reported from 0.2 to 2.5 % in clinical studies versus 0.02-0.17 % in worldwide arthroplasty registers. CONCLUSIONS:Fractures of knee arthroplasty systems are rare complications, with clinical studies showing higher incidence rates than worldwide arthroplasty registries. Unicompartmental knee arthroplasty (UKA) implanted before 2000, constrained primary or revision constrained total knee arthroplasties, and patellar replacements showed the highest incidence of implant fracture. The results of this analysis can help clinicians to counsel patients on potential complications following knee arthroplasty. LEVEL OF EVIDENCE: III.
Authors: Travis H Smith; Bishoy V Gad; Alison K Klika; Joseph F Styron; Timothy A Joyce; Wael K Barsoum Journal: J Arthroplasty Date: 2013-01 Impact factor: 4.757
Authors: Kevin J Bozic; Steven M Kurtz; Edmund Lau; Kevin Ong; Vanessa Chiu; Thomas P Vail; Harry E Rubash; Daniel J Berry Journal: Clin Orthop Relat Res Date: 2009-06-25 Impact factor: 4.176