Spine
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Comparative Study
In vivo topographic analysis of lumbar facet joint space width distribution in healthy and symptomatic subjects.
In vivo 3-dimensional facet joint space width measurement. ⋯ This in vivo study shows variations in facet joint space width narrowing with spinal level and region within the facet joint and in vivo evidence of localized, age-influenced facet cartilage thinning. Techniques developed in this study may be applied in the detection of early osteoarthritis-related changes in the facet joints.
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Epidemiological total population study based on a prospective follow-up cerebral palsy (CP) registry. ⋯ The incidence of scoliosis increased with GMFCS level and age. Observed variations related to CP subtype were confounded by the GMFCS, reflecting the different distribution of GMFCS levels in the subtypes. Follow-up programs for early detection of scoliosis should be based on the child's GMFCS level and age.
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Comparative Study
Biomechanical comparison of occiput-C1-C2 fixation techniques: C0-C1 transarticular screw and direct occiput condyle screw.
In vitro human cadaveric biomechanical study. ⋯ The C0-C1 transarticular screw technique and direct occipital condyle screw with C1 lateral mass screw technique can be salvage fixation methods when occipital plate fixation is not feasible.
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Retrospective case series. ⋯ Posterior vertebral column resection is an effective technique providing a successful correction of stiff complex congenital deformities. However, it is a technically demanding procedure, with possible risks for major complications.
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Finite element analysis. ⋯ Finite element modeling suggests that the pathomechanics at the proximal end of a scoliosis construct may be diminished by preserving the ISL/SSL complex and possibly completely eliminated with the use of rods with a diameter transition at the most proximal level.