Retrospective Cohort Study
Copyright ©The Author(s) 2019.
World J Orthop. Mar 18, 2019; 10(3): 128-136
Published online Mar 18, 2019. doi: 10.5312/wjo.v10.i3.128
Table 1 Radiographic alignment at two years
Radiographic alignment at two years, mean (SD)FPRPP value
Anatomical axis174.7° (1.69°)175.30° (2.32°)0.428
Mechanical axis179.49° (2.47°)181.10° (2.41°)0.838
Anatomic lateral distal femoral angle (aLDFA)86.60° (3.5°)85.70° (2.74°)0.960
Medial proximal tibial-angle (MPTA)89.84° (2.81°)90.31° (1.37°)0.084
Posterior femoral-prosthetic angle90.3° (2.97°)88.51° (2.89°)0.753
Posterior tibial-prosthetic angle88.9° (1.9°)89.07° (2.12°)0.790
Anterior femoral-prosthetic angle8.2° (3.02°)6.42° (2.11°)0.262
Patellar tilt angle alpha25.64° (7.87°)26.81° (4.84°)0.407
Patellar tilt angle gamma1.32° (3.3°)1.87° (3.5°)0.805
Table 2 Demographic data
VariableFPRPP value
Age; yr, mean (SD)71.89 (9.8)71.70 (7.84)0.94
Gender (% males); (M-F)45%; (9-11)36.8%; (7-12)0.43
Weight; kg, mean (SD)78.36 (10.71)76.05 (14.32)0.57
Pre-operative; ASA scoreASA 1: 0 (0%); ASA 2: 15 (75%); ASA 3: 5 (15%)ASA 1: 2 (10.5%); ASA 2: 12 (63.1%); ASA 3: 5 (26.3%)0.85
Table 3 Pre-operative scores
Scores before surgery, mean (SD)FPRPP value
SF-3666.63 (15.10)58.41 (20.30)> 0.05
KOOS51.2 (3.78)50.95 (4.07)> 0.05
HSS Patella Score53.15 (12.71)58.75 (7.04)> 0.05
Knee Performance Score48.68 (10.52)50.75 (22.43)> 0.05
Knee Score65.92 (9.44)69.77 (8.73)> 0.05
Table 4 Post-operative scores
Scores two yr after surgery, mean (SD)FPRPP value
SF-3675.94 (17.27)65.10 (22.40)> 0.05
KOOS symptoms73.49 (17.63)86.44 (8.39)< 0.05
HSS Patella Score; HSS Patella Score objective73.68 (16.73); 22.36 (6.74)86.50 (12.98); 28.75 (6.66)< 0.05; < 0.05
Knee Performance Score80.26 (14.85)74.75 (10.52)> 0.05
Knee Score83.94 (12.35)87.52 (10.08)> 0.05