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Table 1 Deviations from preoperative mechanical leg axis in subtrochanteric osteotomies

From: The impact of mal-angulated femoral rotational osteotomies on mechanical leg axis: a computer simulation model

Angulation Error of the Osteotomy PlanePlaneError in the Mechanical Leg Axis Alignment per Rotation
10°15°20°30°
+/−  5°Sagittal0.2° ± 0.2°0.3° ± 0.3°0.4° ± 0.3°0.5° ± 0.4°0.7° ± 0.5°
Frontal0.1° ± 0.1°0.2° ± 0.1°0.2° ± 0.1°0.3° ± 0.2°0.4° ± 0.2°
+/− 10°Sagittal0.2° ± 0.1°0.5° ± 0.2°0.7° ± 0.3°0.9° ± 0.3°1.4° ± 0.4°
Frontal0.1° ± 0.0°0.2° ± 0.1°0.3° ± 0.1°0.3° ± 0.1°0.4° ± 0.3°
+/−  15°Sagittal0.3° ± 0.1°0.7° ± 0.2°1.0° ± 0.3°1.4° ± 0.3°2.1° ± 0.4°
Frontal0.1° ± 0.0°0.2° ± 0.1°0.3° ± 0.1°0.4° ± 0.1°0.5° ± 0.3°
+/− 20°Sagittal0.5° ± 0.1°0.9° ± 0.2°1.4° ± 0.3°1.8° ± 0.3°2.8° ± 0.4°
Frontal0.2° ± 0.0°0.3° ± 0.1°0.4° ± 0.0°0.5° ± 0.0°0.5° ± 0.2°
+/−  30°Sagittal0.7° ± 0.1°1.3° ± 0.2°2.0° ± 0.2°2.7° ± 0.3°4.0° ± 0.4°
Frontal0.2° ± 0.1°0.3° ± 0.1°0.5° ± 0.1°0.6° ± 0.1°0.6° ± 0.2°
  1. Errors in mechanical leg axis greater than 2° (mean value plus standard deviation) have been marked bold