[An analysis of the selected parameters of the normal hip joint during growth in magnetic resonance imaging]

Dynamics of the selected parameters of the normal hip joint during growth has been presented. Fifty-three normal hips in 40 individuals aged 3-17 years were assessed with Magneton Impact MRI. The angles and indices were found on T1 coronal images in Spin Echo or Turbo Spin Echo sequence. Acetabular roof angle of Hilgenreiner, acetabular inclination angle of Sharp, Wiberg angle and Heyman-Herndon index were calculated with both bony and cartilaginous elements regarded. Parameters based on cartilaginous parts of the joint did not change during normal growth, but they do change if calculated with the use of bony landmarks reaching Acartilaginous values by the age of 14-15. The results suggest, that during growth gradual ossification of cartilaginous elements takes place but the proportions remain unchanged. The investigation determines the age of enhanced ossification and the age of its termination.