Response to: Clinical Implication of Mid-Range Dynamic Instability in Lumbar Degenerative Spondylolisthesis

摘要

We appreciate the letter regarding our manuscript entitled“Clinical implication of mid-range dynamic instabilityin lumbar degenerative spondylolisthesis [1].” We thankthe readers who are interested in our article and providedvaluable feedback. Our reply to comments is as follows:(1) In this study, it was important to examine whetheroccult movement exists and whether it is related to anyother factors. Therefore, patients with increased listhesisduring mid-flexion within the range of motion were important,and the values were within a significant range.The position of the leg, pelvis, extension, mid-flexion, andangle of flexion were indicated on the whole-body plate asfollows, and 30°–60°, including hip flexion, was assumedas the mid range. With the help of a trained imaging department,the patient was asked to fix the pelvis with thelower limbs as straight as possible and to keep them asshown in the picture (Fig. 1).