Evaluating Osseointegration Into a Deeply Porous Titanium Scaffold: A Biomechanical Comparison With PEEK and Allograft.

Study Design: This was a biomechanical push-out testing study using a porcine model.

Objective: The purpose was to evaluate the strength of implant-bone interface of a porous titanium scaffold by comparing it to polyetheretherketone (PEEK) and allograft.

Summary Of Background Data: Osseointegration is important for achieving maximal stability of spinal fusion implants and it is desirable to achieve as quickly as possible.

Kinematic analysis of the relationship between the grade of disc degeneration and motion unit of the cervical spine.

Study Design: Kinetic MRIs of cervical spines were obtained and analyzed according to the amount of motion and the degenerative grade of the intervertebral disc.

Objective: To define the relationship between the grade of disc degeneration and the motion unit of the cervical spine and elucidate changes in the role of each cervical spine unit during flexion-extension motion caused by degeneration.

Summary Of Background Data: Degenerative changes in the cervical disc occur with age.

Surgeon perceptions of the complications and value of threaded fusion cages as a spine fusion technique: results of a consensus survey.

Background Context: Threaded cage technology has had a meteoric rise in usage. It has been touted as a procedure with low risk and minimal complications.

Purpose: To gauge the spine surgical community's general consensus regarding cage usage and its complications.

Complications and strategies for salvage of intervertebral fixation devices.

The recent evolution of interbody fixation devices, known as threaded interbody fusion cages, is a significant new form of segmental fixation for application to the lumbar and lumbosacral spine. This article discusses the construction, biomechanics, and use of these devices, which serve as carriers for autogenous graft material while restoring segmental stability to the involved motion segment. The biomechanics of these devices greatly surpasses those of the interbody spacers used historically.