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Table 3 Different scenarios in which TKA is deemed appropriate, uncertain or inappropriate according to Escobar et al. [9]

From: Indication criteria for total hip or knee arthroplasty in osteoarthritis: a state-of-the-science overview

Symptoms Radiology Age Mobility Localisation Total knee arthroplasty
Slight or moderate Ahlbäck I-III     Inappropriate
Slight Ahlbäck IV-V     Inappropriate
Moderate Ahlbäck IV-V <55    Inappropriate
Moderate Ahlbäck IV-V ≥55   Uni Inappropriate
Moderate Ahlbäck IV-V ≥55   Bi-tri Appropriate
Intense-severe Ahlbäck I-III <55   Uni-bi Inappropriate
Intense-severe Ahlbäck I-III <55   Tri Uncertain
Intense-severe Ahlbäck I ≥55 Normal   Inappropriate
Intense-severe Ahlbäck II-III ≥55 Normal   Uncertain
Intense-severe Ahlbäck I 55-65 Limited   Uncertain
Intense Ahlbäck I >65 Limited   Uncertain
Severe Ahlbäck I >65 Limited   Appropriate
Intense-severe Ahlbäck II-III ≥55 Limited   Appropriate
Intense-severe Ahlbäck IV-V <55   Uni Uncertain
Intense-severe Ahlbäck IV-V <55   Bi-tri Appropriate
Intense-severe Ahlbäck IV-V ≥55    Appropriate
  1. Legend: uni: unicompartmental excluded patello-femoral isolated; bi: unicompartmental plus patello-femoral; tri: tricompartmental