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Table 2 Preoperative, Immediate Postoperative, and Two-year Follow-Up Radiologic Parametersa

From: Anatomic double-bundle medial patellofemoral ligament reconstruction with aperture fixation using an adjustable-length loop device: a 2-year follow-up study

Knee flexion angle Preop   Postop   F/U
Lateral patellofemoral angle (o) 30 o −7.6 ± 10.6   7.6 ± 3.1   8.8 ± 4.1
   < 0.001   0.260  
45 o −6.2 ± 6.5   9.2 ± 0.4   10.4 ± 4.6
   0.001   0.285  
60 o −0.9 ± 5.6   11.0 ± 2.5   13.0 ± 3.2
   0.006   0.140  
90 o 6.6 ± 3.4   12.2 ± 2.4   15.6 ± 3.2
   0.033   0.093  
Congruence angle (o) 30 o 30.1 ± 13.9   3.6 ± 1.5   2.9 ± 1.3
   < 0.001   0.221  
45 o 26.1 ± 15.2   2.9 ± 1.0   2.7 ± 1.0
   0.001   0.233  
60 o 18.4 ± 11.0   2.8 ± 1.6   2.7 ± 1.4
   0.014   0.008  
90 o 11.5 ± 7.4   1.7 ± 1.1   1.7 ± 1.0
   0.010   0.483  
Sulcus angle (o) 30 o 146.9 ± 7.4   145.3 ± 6.4   145.4 ± 5.5
   0.491   0.442  
45 o 146.6 ± 2.4   145.5 ± 1.7   146.0 ± 4.8
   0.549   0.255  
60 o 146.1 ± 4.5   145.2 ± 5.9   146.5 ± 5.4
   0.870   0.302  
90 o 146.4 ± 3.4   145.8 ± 5.5   144.8 ± 5.0
   0.634   0.322  
IS Ratio   1.2 ± 0.1     1.1 ± 0.1
    < 0.001   
  1. IS Ratio Insall-Salvati ratio
  2. aValue are mean ± standard deviation
  3. P-value was expressed in Italic
  4. Values of P < 0.05 are displayed in bold