Journal of spinal disorders & techniques
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J Spinal Disord Tech · May 2013
Mid-term follow-up of clinical and radiologic outcomes in cervical total disk replacement (Mobi-C): incidence of heterotopic ossification and risk factors.
Cervical arthroplasty has been shown to have successful, short-term and long-term radiologic and clinical outcomes. The incidence of and predisposing factors for heterotopic ossification (HO) have not been determined. We retrospectively assessed the intermediate-term clinical and radiologic outcomes, especially the incidence of HO and its risk factors. ⋯ Intermediate follow-up of cervical arthroplasty showed good clinical outcomes, although there was a trend toward reduction in alignment and motion at 24 months. The overall HO occurrence was 94.1% at 24 months. In our study, the most important factor affecting HO was the different surgical techniques.
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An in vitro cadaveric biomechanical study. ⋯ The MPD restricted the A-P instability of the C1-C2 complex. In flexion, extension, and axial rotation, the C1-C2 ROM of the MPD was about 50% of the ROM in Intact, whereas equivalent to Intact in lateral bending.
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J Spinal Disord Tech · May 2013
Usefulness of MRI in determining the appropriate level of cement augmentation for acute osteoporotic vertebral compression fractures.
This is a prospective study on consecutive patients with acute osteoporotic vertebral compression fractures (OVCFs). ⋯ MRI with STIR sequencing exhibited a multitude of benefits in the exact identification of acute lesions and hidden lesions. Because of the high rate of misdiagnosis using standard plain radiographs and CT scans of the spine for OVCFs, MRI with STIR sequencing should be considered before cement augmentation procedures. Moreover, in cases with multiple lesions or severe osteoporosis, the importance of MRI should be further emphasized.
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J Spinal Disord Tech · May 2013
Anterior cervical intercorporal fusion in patients with osteoporotic or tumorous fractures using a cement augmented cervical plate system: first results of a prospective single-center study.
Prospective observational clinical study. ⋯ In patients with severe osteoporosis or in patients with advanced tumor disease, excellent surgical, clinical, and radiologic results are possible following our method. In our opinion, a second-step posterior approach can be avoided by this technique.
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J Spinal Disord Tech · May 2013
Comparative StudyComparison of isocentric C-arm 3-dimensional navigation and conventional fluoroscopy for C1 lateral mass and C2 pedicle screw placement for atlantoaxial instability.
A retrospective study. ⋯ On comparing the 2 imaging techniques, it was found that using Iso-C 3D navigation can significantly improve the accuracy of screw placement and decrease intraoperative fluoroscopic time and blood loss. This study demonstrates that Iso-C 3D navigation is a safe and effective means of guiding C1LM-C2P screw fixation for atlantoaxial instability.