C1-C2 arthroplasty for craniovertebral junction instability: A preliminary proof of concept in human cadavers.

Background: The atlantoaxial complex contributes to significant neck movements, especially the axial rotation. Its instability is currently treated with various C1-C2 fusion techniques. This however, considerably hampers the neck movements and affects the quality of life; a C1-C2 motion preserving arthroplasty could potentially overcome this drawback.

A new lumbar fixation device alternative to pedicle-based stabilization for lumbar spine: cadaver investigation.

To evaluate the stability provided by a new bilateral fixation technique using an investigation for posterior lumbar segmental instrumentation. Experimental cadaver study. In this study, we propose an alternative technique for a posterior lumbar fixation technique called "inferior-oblique transdiscal fixation" (IOTF).