Case Diagnosis Pre-operative Post-operative
Ext. (°) Flex. (°) RoM (°) KSS Ext. (°) Flex. (°) RoM (°) KSS
1 Rheum.arth. Synovectomy - 20 80 60 39 -5 75 70 69
2 Rheum.arth. Synovectomy -15 50 35 47 -5 80 75 79
3 Rheum.arth. -15 60 45 50 0 90 90 80
4 Rheum.arth. -15 90 75 47 0 90 90 76
5 Rheum.arth. -30 70 40 34 -15 90 75 69
6 Genu varum > 15° -5 80 75 53 0 100 100 90
7 Genu varum > 15° 0 90 90 48 0 95 95 83
8 Genu varum >15°+ neglected patellar fracture - 15 70 55 39 -5 80 75 73
9 Osteotomy+residual genu varum < 15° -5 90 85 41 -5 90 85 80
10 Osteotomy 0 65 65 41 0 80 80 79
11 Patellar fracture with vicious consolidation -10 85 75 40 -5 95 90 88
Mean       63.6 43.5     84.1 78.7
Table legend: Ext. = Extension; Flex. = Flexion; KSS = Knee Society Score; Osteotomy = Closing wedge proximal tibial osteotomy; Rheum. arth. = Rheumatoid arthritis; RoM = Range of motion
Table 1: Pre- and post-operative ranges of motion and KSS value.