How the increase of the cervical disc space height affects the facet joint: an anatomy study.

Study Design: In vitro study on the effect of increasing the height of the cervical disc space on the facet joint.

Objectives: To demonstrate how facet joint articulation is affected by increasing the cervical disc space height.

Summary Of Background Data: A surgeon attempts to increase the disc space and inserts a larger artificial disc than normal in order to keep the intervertebral foramen open and the prosthesis stable.

Effect of the increase in the height of lumbar disc space on facet joint articulation area in sagittal plane.

Study Design: Computerized tomography (CT) of the lumbar spine cadaveric specimens was used to evaluate the effect of increasing the height of the disc space in the lumbar spine to the facet joint articulation in the sagittal plane.

Objective: To show how the facet joint articulation is affected by increasing the height of the disc space in the lumbar spine.

Summary Of Background Data: The Charité Artificial Disc (DePuy Spine, Inc.

Quantitative analysis of changes in cervical intervertebral foramen size with vertebral translation.

Study Design: Simulated translation of the C5 vertebra was performed in 20 embalmed cadaveric cervical spines, and cross-sectional areas of the C4-C5 and C5-C6 intervertebral foramina were measured and compared before and after translation of the C5 vertebra.

Objective: To determine the relationship of cross-sectional intervertebral foraminal areas to the degrees of vertebral translation.

Summary Of Background Data: The common feature of clinical instability and adjacent diseases of the cervical spine is malalignment of the cervical spine (i.

Value of intraoperative true lateral radiograph of C2 pedicle for C1-2 transarticular screw insertion.

Background Context: Transarticular C1-2 screws are widely used in posterior cervical spine instrumentation. Injury to the vertebral artery during insertion of transarticular Cl-2 screw remains a serious complication. Use of a computer-assisted surgery system decreases this complication considerably.