Spine
-
Retrospective, radiographical analysis of mathe-matical formulas used to predict sagittal vertical axis (SVA) after pedicle subtraction osteotomy (PSO). ⋯ Preoperative planning for PSO is essential to optimize postoperative spinal alignment. Mathematical models that do not consider pelvic parameters and changes in unfused spinal segments poorly predict optimal postoperative alignment and may predispose to poor clinical outcomes. The Lafage formulas, which incorporated PT and spinal compensatory changes, best predicted optimal SVA.
-
Retrospective case series. ⋯ Long-term follow-up after surgery for meningiomas indicated that Simpson grade I resection should be selected whenever practicable when treating younger patients or dumbbell-type meningiomas. Tumors recurred at 12 years, on average, in approximately 30% of patients who underwent grade II resection.
-
Randomized Controlled Trial Comparative Study
Direct lateral approach to lumbar fusion is a biomechanically equivalent alternative to the anterior approach: an in vitro study.
A human cadaveric biomechanical study of lumbar mobility before and after fusion and with or without supplemental instrumentation for 5 instrumentation configurations. ⋯ Our data support that the direct lateral approach, when supplemented with bilateral PSF, is a minimally invasive and biomechanically stable alternative to the open, anterior approach to lumbar spine fusion.
-
This case report shows primary natural killer (NK)/T-cell lymphoma originating in the spine as the first case of successful treatment with autologous stem cell transplantation, along with case presentation and literature review. ⋯ Some primary NK/T-cell lymphomas that originate at sites other than the nasal cavity/nasopharynx do not present with typical clinical features and symptoms. A primary NK/T-cell lymphoma of the spine should be considered in the differential diagnosis of primary bone tumors. We report the first case of successful treatment with chemoradiotherapy and autologous stem cell transplantation in a patient with a primary spinal NK/T-cell lymphoma.
-
Comparative Study
Host bone response to polyetheretherketone versus porous tantalum implants for cervical spinal fusion in a goat model.
In vivo assessment of polyetheretherketone (PEEK) and porous tantalum (TM) cervical interbody fusion devices in a goat model. ⋯ The TM implants supported bone growth into and around the implant margins better than the PEEK devices. TM's open cell porous structure facilitated host bone ingrowth and bone bridging through the device, which could be beneficial for long-term mechanical attachment and support in clinical applications.