Table 2 Results of the two groups after each follow-up

Pain (VAS)

   3

2.6 ± 2.1

4.5 ± 2.7

0.006

   6

1.4 ± 2.1

3.2 ± 2.8

0.013

   12

0.5 ± 1.1

1.1 ± 1.9

0.160

Flexion (°)

   3

109.0 ± 10.5

100.2 ± 12.0

0.007

   6

138.3 ± 10.9

127.7 ± 16.6

0.009

   12

140.4 ± 10.3

136.9 ± 11.0

0.246

ROM (°)

   3

104.8 ± 13.8

93.9 ± 15.1

0.009

   6

136.7 ± 12.7

125.2 ± 18.5

0.012

   12

139.2 ± 11.8

135.0 ± 12.7

0.219

Lysholm score

   3

84.4 ± 5.8

79.0 ± 5.3

0.001

   6

86.7 ± 6.4

81.5 ± 4.6

0.002

   12

93.2 ± 5.3

89.8 ± 6.2

0.039