Spine
-
Propensity-matched case-control study. ⋯ This study demonstrates a difference in outcomes after lumbar spinal fusion between long-term disability and workers' compensation populations. Although, these populations achieve only marginal improvement, it seems that the type of compensation status influences outcome. Workers' compensation has a clear, negative influence on outcome when compared with controls, whereas well-selected patients receiving disability compensation seem more likely to benefit from lumbar fusion. Therefore, surgeons and researchers alike should not include disability compensation patients in the same cohort as patients on workers' compensation.
-
Observational cohort study. ⋯ Although small, there were indicators that alterations in spinal movement and coordination in subjects with recurrent LBP were due to adaptive changes rather than the presence of pain.
-
Prospective investigation using a posterolateral spinal fusion (PLSF) model in rabbits. ⋯ In experimental PLSF model in rabbits, PRP was not effective in promoting new bone formation and vascularization.
-
An experimental animal study. ⋯ These findings indicate that resorption of spinous processes because of a result of implant loosening, inhibit the targeted load redistribution through the PEEK nonfusion interspinous device in the lumbar spinal segment of the rat. This leads to reduced long-term stability of the implant in the animal model. These results suggest that PEEK nonfusion interspinous devices like the Wallis implants may have time-limited effects and should only be used for specified indications.