Comparison of two-transsacral-screw fixation versus triangular osteosynthesis for transforaminal sacral fractures.

Transforaminal pelvic fractures are high-energy injuries that are translationally and rotationally unstable. This study compared the biomechanical stability of triangular osteosynthesis vs 2-transsacral-screw fixation in the repair of a transforaminal pelvic fracture model. A transforaminal fracture model was created in 10 cadaveric lumbopelvic specimens.

Biomechanical evaluation of an expandable cage in single-segment posterior lumbar interbody fusion.

Study Design: Controlled laboratory study.

Objective: To evaluate the biomechanical characteristics of a new expandable interbody cage in single-segment posterior lumbar interbody fusion (PLIF) using cadaveric lumbar spines.

Summary Of Background Data: One of the popular methods of treating lumbar spine pathologies involves a posterior lumbar interbody fusion using bilateral interbody nonexpandable cages.

Biomechanical evaluation of short-segment posterior instrumentation with and without crosslinks in a human cadaveric unstable thoracolumbar burst fracture model.

Study Design: This study evaluates the biomechanical characteristics of spinal instrumentation constructs in a human unstable thoracolumbar burst fracture model simulated by corpectomy.

Objective: To compare the biomechanical characteristics of short-segment posterior instrumentation, with and without crosslinks, in a human unstable burst fracture model simulated by corpectomy.

Summary Of Background Data: Unstable thoracolumbar burst fractures are serious injuries, and their management remains controversial.

Site specificity of transverse crista terminalis conduction in patients with atrial flutter.

Introduction: The causes of transcristal conduction (TC) in patients with atrial flutter (AFL) are unknown.

Methods And Results: In two groups of patients referred for AFL ablation, 36 had cavotricuspid isthmus (CTI) dependent flutter (Group I) and 24 had lower (n = 21) or upper loop reentry (n = 5) (Group II). After ablation, isthmus block was evaluated by pacing from the coronary sinus (CS) and low lateral right atrium and by alternative techniques, including mapping with electrodes spanning the CTI or electroanatomic mapping.

Intervertebral disc cell therapy for regeneration: mesenchymal stem cell implantation in rat intervertebral discs.

This study explores the use of mesenchymal stem cells (MSCs) for intervertebral disc regeneration. We used an in vivo model to investigate the feasibility of exogenous cell delivery, retention, and survival in the pressurized disc space. MSC injection into rat coccygeal discs was performed using 15% hyaluronan gel as a carrier.