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Table 2 Radiographic evaluation in the modified group and the conventional group

From: A novel extramedullary technique to guide femoral bone preparation in mobile unicompartmental knee arthroplasty based on tibial cut and overall alignment

 

Group A—modified group(mean ± SD(range))

Group B—conventional group(mean ± SD(range))

T value

p value

Preoperative HKAA (degrees)

173.27 ± 3.51(166.0~179.5)

173.55 ± 4.14(165.7~179.8)

− 0.362

0.718

Preoperative LDFA (degrees)

82.13 ± 2.57(77.1~88.5)

82.35 ± 2.71(75.3~88.9)

− 0.409

0.684

Preoperative MPTA (degrees)

85.35 ± 3.21(76.7~90.8)

85.79 ± 3.28(79.4~92.5)

− 0.670

0.505

Preoperative tibial posterior slope (degrees)

7.91 ± 3.56(0.2~15.8)

8.26 ± 3.61(− 0.1~16.3)

− 0.488

0.626

Postoperative HKAA (degrees)

177.54 ± 3.35(170.2~183.7)

177.05 ± 3.09(170.5~186.3)

0.758

0.450

Postoperative femoral angle A (degrees)

1.80 ± 3.46(− 4.9~13.0)

2.35 ± 2.35(− 2.9~11.1)

− 0.921

0.360

Postoperative femoral angle B (degrees)

5.31 ± 4.16(0.0~17.3)

4.66 ± 3.23(0.7~18.9)

0.870

0.387

Postoperative tibial angle E (degrees)

0.83 ± 2.09(− 3.5~8.9)

1.07 ± 1.75(− 2.4~4.8)

− 0.627

0.532

Postoperative tibial angle F (degrees)

6.87 ± 2.20(1.1~11.7)

6.36 ± 2.05(2.8~11.2)

1.203

0.232

  1. Abbreviations: HKAA hip-knee-ankle angle, LDFA lateral distal femoral angle, MPTA medial proximal tibia angle