The purpose of this study was to investigate and determine whether there are differences in L5 pedicles morphology between isthmic degenerative L5–S1 spondylolisthesis. One hundred nineteen patients with spondylolisthesis 45 at were enrolled the IS group DS group, respectively, 164 lumbar disc herniation without spondylolysis or classified into normal (NL) group. A series pedicle parameters fif...