Spine
-
Comparative Study
Closing wedge osteotomy versus opening wedge osteotomy in ankylosing spondylitis with thoracolumbar kyphotic deformity.
Retrospective. ⋯ Both OWO and CWO were safe and enabled substantial correction, with good clinical results. CWO resulted in a significantly longer operative time and more bleeding but offered fewer instances of paralytic ileus or delayed union with a broken rod.
-
Comparative Study
Spinopelvic alignment in patients with osteoarthrosis of the hip: a radiographic comparison to patients with low back pain.
A retrospective, age- and sex-matched radiographic study. ⋯ These findings suggest that higher PI in the younger individual may contribute to the development of HOA in later life without both lumbar kyphosis and acetabular dysplasia because of the anterior uncovering of the acetabulum. More investigation will be expected to analyze the spinopelvic alignment in patients with hip spine syndrome.
-
A porous tantalum implant (Hedrocel, Implex Corp., Allendale, NJ), designed to assist interbody lumbar fusion, was tested biologically in an experimental model. A total of 11 female Danish landrace pigs received 3 levels of anterior lumbar interbody fusion at L2-L3, L4-L5, and L6-L7. Each level was randomly assigned one of the procedures: (1) implantation of PT-ring with pedicle screw fixation (PSF), (2) implantation of a porous tantalum ring (PT-ring) stabilized anteriorly with staples, or (3) implantation of carbon fiber cage (CF-cage) stabilized anteriorly with 2 staples. Each implant was filled with autogenous iliac crest bone graft. ⋯ Interbody fusion using a PT-ring cage packed with autologous bone achieved higher interface healing and more reliable fusion when fixated with supplementary pedicle screws than did fixated anteriorly with 2 staples. A lesser amount of bone graft was required, and bone remodeling was enhanced in the PT-ring when compared to the CF-cage.
-
Retrospective study. ⋯ PVCR is an effective alternative for severe rigid scoliosis. It is a highly technical procedure and should only be performed by an experienced surgical team.
-
Comparative Study
Variability in Cobb angle measurements using reformatted computerized tomography scans.
Survey of intraobserver and interobserver measurement variability. ⋯ Reformatted CT images may be used for manual measurement of coronal Cobb angles in idiopathic scoliosis with similar variability to manual measurement of plain radiographs.