Abstract
Purpose
Anterior femoral notching (AFN) may be associated with a higher risk for supracondylar periprosthetic fracture (sPPF) after total knee arthroplasty (TKA), although studies have yielded inconclusive results. We aimed to systematically investigate and meta-analyze the best available evidence regarding the association between AFN and the risk of sPPF after TKA.
Methods
A comprehensive search of PubMed, Scopus, Mendeley, Google Scholar and Cochrane databases was performed, from conception to February 29, 2020. Data were expressed as odds ratio (OR) with 95% confidence intervals (CI). I2-index was employed for heterogeneity. Newcastle–Ottawa scale was implemented for quality assessment of the included studies.
Results
Nine studies fulfilled the eligibility criteria, including a total of 3264 patients subjected to TKA. Among them, there were 150 patients who sustained a sPPF. Overall, patients exposed to AFN (AFN group) demonstrated an increased risk for sPPF compared to those not exposed (control group) (OR 3.91, 95% CI 1.22–12.58, p = 0.02; I2 68.52%). Subgroup analysis based on AFN depth with a cut-off value of 3 mm further clarified this association. Patients with AFN ≥ 3mm were at higher risk for sPPF compared to patients with AFN < 3 mm and control group (OR 4.85, 95% CI 2.08–11.33, p = 0.00; I2 0.0%). On the contrary, fracture risk was not significant for patients with AFN < 3 mm compared to the control group (OR 5.0, 95% CI 0.44–56.82, p = 0.19; I2 42.99%).
Conclusion
Patients, exposed to AFN ≥ 3 mm in depth, are at higher risk for sustaining a sPPF.
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D.S., N.K.G. and K.A. contributed to the study conception and design, reviewed the literature, extracted and analyzed the data. N.K.G. was responsible for statistical analysis, with further contribution from D.S., K.A. and S.S.; D.S. wrote the first draft of the manuscript with further contribution from N.K.G., K.A. and S.S.; E.K. and P.A. reviewed the initial manuscript, providing critical scientific input and resolved disagreements regarding study selection and quality assessment. I.S., M.P., L.P. and E.T. reviewed the final draft and provided critical scientific input.
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Stamiris, D., Gkekas, N.K., Asteriadis, K. et al. Anterior femoral notching ≥ 3 mm is associated with increased risk for supracondylar periprosthetic femoral fracture after total knee arthroplasty: a systematic review and meta-analysis. Eur J Orthop Surg Traumatol 32, 383–393 (2022). https://doi.org/10.1007/s00590-021-02989-z
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DOI: https://doi.org/10.1007/s00590-021-02989-z