[Measurement data of the lateral lumbosacral region in healthy subjects during the growth period].

The following measurement data were obtained to characterise the healthy lumbosacral profile, via lateral x-rays taken of 90 female and 90 male patients between 8 and 17 years of age: Degree of slip 0%, slip angle -21.3 degrees, sacral inclination 45.5 degrees, posterior lumbosacral angle 140.5 degrees. These measurement data are independent of age and sex. If an adolescent suffers from lumbosacral spondylolisthesis, they will quantify the process of slip that has taken place, more accurately than the conventional method after Meyerding. If the shape of the sacral vertebra is considered at the same time, these parameters will also enable to assess the risk of progression of spondylolisthesis to a degree that is satisfactorily accurate in clinical practice.