Locomotor biomechanics after total sacrectomy: a case report.

Study Design: Biomechanical analysis of locomotion after total sacrectomy in a single patient case.

Objective: To describe the biomechanics of locomotion after successful total sacrectomy and spinopelvic reconstruction.

Summary Of Background Data: Total sacrectomy is a complex surgery that has significant consequences for mobility after surgery due to loss of lower lumbar and sacral innervation to the lower extremities, and the anatomic dissociation of the spine from the pelvis.

The analysis of axisymmetric viscoelasticity, time-dependent recovery, and hydration in rat tail intervertebral discs by radial compression test.

The goal of this study was to develop a nondestructive radial compression technique and to investigate the viscoelastic behavior of the rat tail disc under repeated radial compression. Rat tail intervertebral disc underwent radial compression relaxation testing and creep testing using a custom-made gravitational creep machine. The axisymmetric viscoelasticity and time-dependent recovery were determined.