Spine
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Comparative Study
Computer navigation in balloon kyphoplasty reduces the intraoperative radiation exposure.
Comparison of the dose area product (DAP), the radiation time and the operation time during computer navigated and conventional balloon kyphoplasty procedures. ⋯ The use of computer navigation systems in balloon kyphoplasty procedures reduces the radiation exposure of patients and surgeons significantly. The increased technical effort did not lead to a significant longer operation time. Hence, the use of computer navigation systems in balloon kyphoplasty procedures is recommended.
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Biomechanical effect of implantation of an artificial disc (AD) was investigated using the nonlinear three-dimensional finite element model of L4-L5. The SB CHARITE and the Prodisc were chosen as the representative prosthesis of unconstrained and constrained ADs (UADs and CADs) and compared with the intact human intervertebral disc. ⋯ By the result of this study it is obvious that implanted segment with AD has large range of motion and suffers from increased loading to surrounding bone and ligaments. The UAD has larger range of motion but exert less loading to the implanted segment than the CAD. It seems that the mobile center of rotation of the UAD has the ability to lessen the facet contact force and stress on the vertebral body.
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Validation study to define validity and reliability of an adapted and translated questionnaire. ⋯ The authors report the validation of a simplified Chinese SRS-22 for use in mainland China, which is culturally relevant, reliable, repeatable, psychometrically sound, and suitable for immediate clinical use.
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Randomized Controlled Trial Comparative Study
A prospective, randomized, blinded, single-site study to evaluate the clinical and radiographic differences between frozen and freeze-dried allograft when used as part of a circumferential anterior lumbar interbody fusion procedure.
Prospective, randomized clinical trial from a single surgeon's patient population. ⋯ When the results are considered in terms of clinical outcomes, the 2 methods of graft preservation perform with few statistically significant differences. Radiographic analysis showed that the freeze-dried graft had a higher likelihood of pseudarthrosis.
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An anatomic study conducted on cadaveric specimens. ⋯ S2 iliac technique is a potential option for distal fixation in spine surgery. Biomechanical and clinical data are required to fully evaluate the potential of this technique.