TKA following high tibial osteotomy versus primary TKA - a matched pair analysis

Table 2 Radiographic assessment according to the Knee Society Roentgenographic Evaluation System

	HTO group	Control group	P-value
Femoral component flexion a-p (α)	97° ± 3.1° (92°-102°)	97° ± 3.2° (91°-104°)	0.76
Tibial component angle a-p (β)	87° ± 1.7° (82°-92°)	87° ± 2.1° (81°-93°)	0.86
Femoral component flexion lat (γ)	4.7° ± 2.7° (0°-10°)	5° ± 2.3° (0°-9°)	0.69
Tibial component angle lat (δ)	84° ± 1.4° (77°-90°)	82° ± 1° (73°-93°)	0.15
Loosening of the components
Femoral lat (mm)	n = 4 (1); 3 (2); 1 (3); 2 (4)	n = 2 (1); 4 (2)	0.50
Tibial a-p and lat (mm)	n = 4 (1); 1 (4); 1 (5)	n = 2 (1); 3 (2)	0.17

The values of the specific angles are listed as mean, with standard deviation and range. Suspicious radiolucencies (5 mm) were noted in one tibial component in the HTO group. a-p: anteroposterior view, lat: lateral view.

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