Table 1.

Translation and rotation at three, 12 and 24 months. Values presented as mean and standard deviation (SD)

Measured parameter	Three months	12 months	24 months
Translation, mm
Media–lateral (X)	-0.006 (0.243)	0.076 (0.175)	0.131 (0.243)
Proximal–distal (Y)	-0.014 (0.16)	0.065 (0.196)	-0.009 (0.175)
Anterior–posterior (Z)	0.133 (0.32)	-0.121 (0.524)	-0.028 (0.402)
Rotation, degrees
Transverse axis (X)	0.449 (0.674)	-0.093 (1.692)	-0.089 (0.965)
Longitudinal axis (Y)	0.345 (1.049)	0.497 (1.599)	-0.077 (1.314)
Sagittal axis (Z)	-0.225 (0.791)	0.008 (0.442)	-0.077 (0.456)