Radiostereometric analysis
fracture, fractures, Fracture
IMPACTION
Screw migration in the femoral head/neck was similar between the HA-coated group and the NON-coated group at 6 weeks, 3 months, and 6 months (Screw migration displayed as means in mm and degrees with 95% confidence intervals (CI 95%) at 6 weeks (Furthermore, there was no statistically significant difference between groups in fracture translations (Fracture migration of the femoral head/neck segment relative to the trochanteric region displayed as means with 95% confidence intervals (CI 95%) at 6-week (The postoperative stereoradiograph constitute the baseline reference for the fracture migration calculations*Statistical comparison of translations and rotations at 6 weeks, 3 months and 6 months with reference to the baseline examination (day 1)Thus, during the impaction phase (the first 6 weeks), the fractures settled with a fracture impaction (y-translation) of mean 5.95 mm (CI 95% 2.87 to 9.04), the femoral head/neck segment rotated anteriorly about the axis of the screw (y-rotation) by mean 2.94° (CI 95% − 5.22 to − 0.66), and the femoral head/neck translated distally (x-translation) by mean − 1.11 mm (CI 95% − 1.87 to − 0.34), with the trochanteric region as reference (Table Fracture migration in mm and fracture rotation in degrees of from baseline to 6 weeks (fracture impaction) and from 6 weeks to 6 months (fracture stabilization)Only patients with both 6 weeks data and 6 months data are included (*Statistical comparison between translations and rotations of the fracture impaction phase and the fracture stabilization phaseGraphs displaying the mean (CI 95%) fracture migration and rotations of the femoral head/neck segment with reference to the trochanteric region displayed as During the stabilization phase (6 weeks to 6 months), the fracture impaction (y-translation) was mean 0.89 mm (CI 95% 0.03 to 1.75) and femoral head/neck posterior rotation (y-rotation) was mean 0.22° (CI 95% − 1.36 to 1.80), which was less compared to the impaction phase (