BMC Musculoskeletal Disorders | |
Distal femoral bone mineral density decreases following patellofemoral arthroplasty: 1-year follow-up study of 14 patients | |
Research Article | |
Albert van Kampen1  Hans-Peter W van Jonbergen2  Kenneth Koster3  Bernardo Innocenti4  Luc Labey4  | |
[1] Department of Orthopaedic Surgery and Orthopaedic Research Laboratory, Radboud University Nijmegen Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands;Department of Orthopedic Surgery, Deventer Hospital, Nico Bolkesteinlaan 75, 7416, SE Deventer, The Netherlands;Department of Radiology, Deventer Hospital, Nico Bolkesteinlaan 75SE Deventer, 7416, The Netherlands;European Centre for Knee Research, Smith & Nephew, Technologielaan 11 Bis, 3001, Leuven, Belgium; | |
关键词: Bone Mineral Density; Total Knee Arthroplasty; Femoral Component; Knee Society Knee Score; Baseline Bone Mineral Density; | |
DOI : 10.1186/1471-2474-11-74 | |
received in 2010-01-13, accepted in 2010-04-20, 发布年份 2010 | |
来源: Springer | |
【 摘 要 】
BackgroundThe bone mineral density (BMD) of the distal femur decreases by 16-36% within one year after total knee arthroplasty (TKA) because of the femoral component's stress-shielding effect. The aim of this prospective study was to determine the quantitative change from the baseline BMD in the distal femur 1 year after patellofemoral arthroplasty using dual-energy X-ray absorptiometry (DXA).MethodsBetween December 2007 and December 2008, 14 patients had patellofemoral arthroplasty for isolated patellofemoral osteoarthritis. Distal femoral BMD was assessed using DXA in 2 regions of interest (ROI) on the lateral view 2 weeks before and 12 months after patellofemoral arthroplasty. The contra-lateral knee was used as a control, with BMD measurements performed in identical ROIs.ResultsThe mean change from baseline BMD in the operated knees after 1 year was -0.169 g/cm2 (95% CI: -0.293 to -0.046 g/cm2) behind the anterior flange (-15%), and -0.076 g/cm2 (95% CI: -0.177 to 0.024 g/cm2) in the supracondylar area 1 cm above the prosthesis (-8%) (p = 0.01 and p = 0.13, respectively). The mean change from baseline BMD in the non-operated knees after 1 year was 0.016 g/cm2 (95% CI: -0.152 to 0.185 g/cm2) behind the anterior flange (2%), and 0.023 g/cm2 (95% CI: -0.135 to 0.180 g/cm2) in the supracondylar area 1 cm above the prosthesis (2%) (p = 0.83, and p = 0.76, respectively).ConclusionsOur findings suggest that patellofemoral arthroplasty results in a statistically significant decrease in BMD behind the anterior flange.
【 授权许可】
CC BY
© van Jonbergen et al; licensee BioMed Central Ltd. 2010
【 预 览 】
Files | Size | Format | View |
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RO202311096170154ZK.pdf | 665KB | download |
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