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Clinical Trial
. 2014 Aug;85(4):427-32.
doi: 10.3109/17453674.2014.931198. Epub 2014 Jun 23.

Anterior knee pain following total knee replacement correlates with the OARSI score of the cartilage of the patella

Vahur Metsna  1 , Sigrid Vorobjov, Katrin Lepik, Aare Märtson
Affiliations
Clinical Trial

Anterior knee pain following total knee replacement correlates with the OARSI score of the cartilage of the patella

Vahur Metsna et al. Acta Orthop. 2014 Aug.

Abstract

Background: Attempts to relate patellar cartilage involvement to anterior knee pain (AKP) have yielded conflicting results. We determined whether the condition of the cartilage of the patella at the time of knee replacement, as assessed by the OARSI score, correlates with postsurgical AKP.

Patients and methods: We prospectively studied 100 patients undergoing knee arthroplasty. At surgery, we photographed and biopsied the articular surface of the patella, leaving the patella unresurfaced. Following determination of the microscopic grade of the patellar cartilage lesion and the stage by analyzing the intraoperative photographs, we calculated the OARSI score. We interviewed the patients 1 year after knee arthroplasty using the HSS patella score for diagnosis of AKP.

Results: 57 of 95 patients examined had AKP. The average OARSI score of painless patients was 13 (6-20) and that of patients with AKP was 15 (6-20) (p = 0.04). Patients with OARSI scores of 13-24 had 50% higher risk of AKP (prevalence ratio = 1.5, 95% CI: 1.0-2.3) than patients with OARSI scores of 0-12.

Interpretation: The depth and extent of the cartilage lesion of the knee-cap should be considered when deciding between the various options for treatment of the patella during knee replacement.

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Figures

Figure 1.
Figure 1.
Obtaining the biopsy of the patella.
Figure 2.
Figure 2.
Delineation of the perimeter of the articular surface of the patella.
Figure 3.
Figure 3.
Marking of the normal cartilage of the patella.
Figure 4.
Figure 4.
OARSI grade 2.
See this image and copyright information in PMC

References

    1. Acebes C, Roman-Blas JA, Delgado-Baeza E, Palacios I, Herrero-Beaumont G. Correlation between arthroscopic and histopathological grading systems o... . Osteoarthritis Cartilage. 2009;17(2):205–12. - PubMed
    1. Agha RA, Webb B. A cadaveric investigation into the links between macroscopic and microsc... . Clin Anat. 2006;19(2):115–24. - PubMed
    1. Baldini A, Anderson JA, Zampetti P, Pavlov H, Sculco TP. A new patellofemoral scoring system for total knee arthroplasty . Clin Orthop. 2006;452:150–4. - PubMed
    1. Baldini A, Anderson JA, Cerulli-Mariani P, Kalyvas J, Pavlov H, Sculco TP. Patellofemoral evaluation after total knee arthroplasty. Validation of a... . J Bone Joint Surg (Am) 2007;89:1810–7. - PubMed
    1. Barrack RL, Wolfe MW, Waldman DA, Milicic M, Bertot AJ, Myers L. Resurfacing of the patella in total knee arthroplasty. A prospective, ra... . J Bone Joint Surg (Am) 1997;79(8):1121–31. - PubMed

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