Table 4 Postoperative range of motion (ROM), postoperative 2011 Knee society score (symptom, patient satisfaction, patient expectation and activity) and Patella score

Postoperative

 Extension angle (°)

0.1 (SD 0.7; 0 ~ 5)

0.49 (SD 1.5; 0 ~ 5)

n.s

 Flexion angle (°)

124 (SD 10.6; 90 ~ 146)

123.6 (SD 7.8; 105 ~ 138)

n.s

2011 Knee society score

 Symptom

18.8 (SD 4.0; 6 ~ 25)

19.9 (SD 4.7; 8 ~ 25)

n.s

 Patient satisfaction

26.2 (SD 5.7; 16 ~ 40)

27.7 (SD 8.1; 16 ~ 40)

n.s

 Patient expectation

9.7 (SD 2.1; 5 ~ 14)

10.4 (SD 2.9; 5 ~ 15)

n.s

 Activity

57.8 (SD 14.5; 22 ~ 87)

64.1 (SD 18.6; 16 ~ 89)

n.s

   FJS-12

52.2 (SD 18.8; 15 ~ 100)

63.5 (SD 20.1; 15 ~ 100)

< 0.01

 Patella score

23.9 (SD 4.0; 13 ~ 30)

23.2 (SD 3.2; 18 ~ 28)

n.s