Comparison of three different screw trajectories in osteoporotic vertebrae: a biomechanical investigation.

ABSTRACT:

Background

Pedicle screw insertion in osteoporotic patients is challenging. Achieving more screw-cortical bone purchase and invasiveness minimization, the cortical bone trajectory and the midline cortical techniques represent alternatives to traditional pedicle screws. This study compares the fatigue behavior and fixation strength of the cement-augmented traditional trajectory (TT), the cortical bone trajectory (CBT), and the midline cortical (MC).

Methods

Ten human cadaveric spine specimens (L1 - L5) were examined. The average age was 86.3 ± 7.2 years. CT scans were provided for preoperative planning. CBT and MC were implanted by using the patient-specific 3D-printed placement guide (MySpine®, Medacta International), TT were implanted freehand. All ten cadaveric specimens w

SUBMITTER: Jarvers JS 

PROVIDER: S-EPMC8101169 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature