Study Design. The thickness and structure of the vertebral body cortex were examined from
sections of human cadaveric vertebrae. Objectives. The objectives were to identify the …

BACKGROUND CONTEXT: Researchers studying early pedicle screw designs have suggested
that pullout strength and insertional torque are correlated. For surgeons using pedicle …

Study Design. A biomechanical study was conducted to assess the stabilization performance
of transfacet pedicle screw fixation. Objective. To compare the biomechanical effects of …

Object. The authors conducted a study to assess the effect of a pilot hole preparation on
screw pullout resistance and screw insertional torque. Methods. Three different screws were …

Study Design. A cadaveric biomechanical experiment was conducted to assess the range of
motion (ROM) and screw strain at S1 in a long instrumented spinal fusion construct to …

Study Design. An anatomic study of pedicle dimensions and orientation was performed for
upper thoracic vertebrae from elderly human subjects. Objectives. To quantify dimensions of …

Background S1 screw failure and L5/S1 non-union are issues with long fusions to S1. Improved
construct stiffness and S1 screw offloading can help avoid this. S2AI screws have shown …

Study Design. In vitro biomechanical comparison of transarticular facet screws to lateral
mass plates in two level instrumentations of the cervical spine. Objective. Lateral mass plates …

Bone fusion can be achieved by one or more of three methods: in situ, onlay, and interbody
fusion. Interbody implants provide the spine with the ability to bear an axial load. They …

Abstract: The field of modern biomechanics has deep historical roots from the ancient Egyptians,
who documented the earliest accounts of spinal injury (2600-2200 BC), as well as from …