A new stand-alone anterior lumbar interbody fusion device: biomechanical comparison with established fixation techniques.

Study Design: Established lumbar fixation methods were assessed biomechanically, and a comparison was made with a new stand-alone anterior lumbar interbody cage device incorporating integrated anterior fixation.

Objectives: To compare the stability of a new stand-alone anterior implant (Test-device) with established fixation methods to assess its suitability for clinical use. Our hypothesis being that the Test-device would provide stability comparable to that provided by an anterior cage when supplemented with posterior pedicle screw fixation.

Biomechanical testing of the lumbar facet interference screw.

Study Design: An in vitro study was conducted to determine the biomechanical properties of a new simple, percutaneous, posterior fixation technique for the lumbar spine involving a new implant, the so-called Lumbar Facet Interference Screw.

Objectives: The purpose of this study was to compare the biomechanical properties of this new fixation device with translaminar and pedicle screw fixation.

Summary Of Background Data: Several techniques were described to perform a minimal invasive posterior stabilization of the lumbar spine after an anterior lumbar interbody fusion procedure.

Biomechanical comparison of expandable cages for vertebral body replacement in the cervical spine.

Object: Recently, expandable cages for vertebral body replacement in the cervical spine have been developed. The purpose of this study was to compare the biomechanical properties of expandable cages with those of a tricortical iliac crest graft and a nonexpandable cage.

Methods: Forty human cervical spines (C3-5) were tested in flexion, extension, axial rotation, and lateral bending.