Fujimaro Ishida

Abstract Pedicle screw (PS) loosening is a recognized complication after lumbar interbody fusion, but the timing of its initial appearance and its temporal distribution remain insufficiently defined. This retrospective study evaluated 212 patients who underwent single-level lumbar interbody fusion with PS fixation to clarify when PS loosening first appears, how it changes over time, and which clinical factors are associated with its development.

Hyperplastic remodeling (HR) lesions are sometimes found on cerebral aneurysm walls. Atherosclerosis is the results of HR, which may cause an adverse effect on surgical treatment for cerebral aneurysms. Previous studies have demonstrated that atherosclerotic changes had a correlation with certain hemodynamic characteristics. Therefore, we investigated local hemodynamic characteristics of HR lesions of cerebral aneurysms using computational fluid dynamics (CFD).

Follow-up angiograms showed 24 aneurysms in the stable group and 13 in the recurrence group. Mann-Whitney U test demonstrated that maximum size, dome volume, neck width, neck area, and coil packing density were significantly different between the two groups (P 1.0 cm/s.