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Table 5 Correlations between the radiographic parameters and the lateral PFP of the RP phase

From: Internal rotational patellar resection and patella alta induced patellar maltracking in total knee arthroplasty: intraoperative measurement of the patellofemoral pressure

 

Lateral PFP of the resurfaced patella phase (N)

 

0° knee flexion

90° knee flexion

120° knee flexion

135° knee flexion

 

rs

p value

rs

p value

rs

p value

rs

p value

Parameters of preoperative radiographs

        

 HKA (°)

−0.20

n.s.

−0.02

n.s.

−0.15

n.s.

0.05

n.s.

 LDFA (°)

0.28

n.s.

−0.05

n.s.

0.00

n.s.

0.01

n.s.

 MPTA (°)

−0.22

n.s.

0.12

n.s.

0.03

n.s.

0.04

n.s.

 AFO (mm)

−0.19

n.s.

0.21

n.s.

0.22

n.s.

0.05

n.s.

 ISR

−0.15

n.s.

0.38

0.012*

0.43

0.0053*

0.31

0.045*

 PT (°)

0.02

n.s.

0.13

n.s.

0.27

n.s.

0.27

n.s.

Parameter of postoperative radiographs

        

 PRA (°)

0.24

n.s.

−0.37

0.015*

−0.56

 < 0.001*

−0.60

 < 0.001*

  1. AFO anterior femoral offset, HKA hip–knee–ankle angle, ISR Insall–Salvati ratio, LDFA lateral distal femoral angle, MPTA medial proximal tibial angle, PFP patellofemoral pressure, PRA patellar resection angle, PT patellar tilt, RP resurfaced patella, n.s. not significant, rs Spearman’s rank correlation coefficients
  2. Significant p values at this threshold are marked with an asterisk
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Knee Surgery & Related Research

ISSN: 2234-2451