Cervical laminoplasty: use of a novel titanium plate to maintain canal expansion--surgical technique.
ABSTRACT Cervical laminoplasty is a technique used to achieve spinal cord decompression in cases of myelopathy or myeloradiculopathy. The most common reason for failure of this technique is restenosis due to hinge closure. Various techniques have been employed to hold the laminar "door" open while the body heals the lamina hinge in the new expanded position. Ideally, a method of achieving laminar fixation should be technically straightforward, provide secure laminar fixation, and be rapid to minimize the risk of iatrogenic injuries, blood loss, and operative time. The authors describe the use of a novel plate designed to accomplish these goals. The technical issues relevant to performing the laminoplasty and securing the laminae are discussed. The plate has been proven biomechanically to be equal or superior to the currently used techniques. The use of this plate will allow the patient to engage in an early active rehabilitation protocol-while minimizing the risk of restenosis of the canal. This may ultimately lead to better preservation of motion and decreased axial neck pain following laminoplasty.
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ABSTRACT: A prospective follow-up study. To elucidate the impact of lamina closure on long-term outcomes after open-door laminoplasty. In a previous study, we did not find significant associations between lamina closure and short-term outcomes. METHODS.: Of the original cohort of 82 patients who underwent open-door laminoplasty, 69 were included in this study (52 men, 17 women; mean age, 60.9 yr; mean follow-up, 6.2 yr; 56 with spondylosis or disc herniation, 13 with ossification of posterior longitudinal ligament). Lamina closure was previously observed in 23 of these patients (closure group) but not in 46 (nonclosure group). The Japanese Orthopaedic Association (JOA) scores and Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire were recorded. The JOA score was 9.9 ± 3.2 in the closure group and 11.2 ± 2.3 in the nonclosure group before surgery (P = 0.1), 13.8 ± 2.3 and 13.8 ± 2.2 at 1.8 years (P = 0.99), and 13.6 ± 2.2 and 14.2 ± 2.7 at final follow-up (P = 0.29). The recovery rate of the JOA scores was 56.7 ± 30.0% and 46.7 ± 29.2% at 1.8 years (P = 0.22) and 51.0 ± 32.5 and 57.6 ± 31.1 at the final follow-up (P = 0.42). The subdomains assessed by the Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire at follow-up were cervical spine function, 68.7 ± 27.5 in the closure group and 67.7 ± 30.0 in the nonclosure group (P = 0.93); upper extremity function, 78.6 ± 24.3 and 87.6 ± 15.4 (P = 0.40); lower extremity function, 69.9 ± 26.0 and 73.9 ± 22.5 (P = 0.68); bladder function, 74.6 ± 22.6 and 84.9 ± 29.2 (P = 0.18); and quality of life, 53.9 ± 25.3 and 56.2 ± 18.1 (P = 0.96). Lamina closure did not significantly impact the long-term surgical outcomes of laminoplasty for cervical myelopathy. Although not statistically significant, the recovery rate tended to decline in the closure group compared with the nonclosure group during the long-term follow-up period, and the utilization of a laminar retention device to prevent the laminar closure should be considered.Spine 01/2012; 37(15):1288-91. · 2.16 Impact Factor
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ABSTRACT: Background. One of the important complications of open-door laminoplasty is a premature laminoplasty closure. In order to prevent premature laminoplasty closure many techniques have been described and a titanium miniplate is one of the instruments to maintain cervical canal expansion. This study was performed to evaluate the effectiveness of titanium miniplates on the union rate for open-door laminoplasty. Materials and Methods. We performed open-door laminoplasty in 68 levels of fourteen patients using maxillofacial titanium miniplates. Axial computed tomography scans were obtained at 6 months postoperatively to evaluate the union rates of the hinge side. The Japanese Orthopedic Association (JOA) score was used to compare the clinical outcomes before and after surgery. Results. Computed tomography scan data was available on 68 levels in 14 patients. There were no premature closures of the hinge or miniplate dislodgements. The union rate on the hinge side was 70.5% (48/68). The mean JOA score increased significantly from 7.0 before surgery to 10.2, 12.2, and 13.0 after surgery at 1, 3, and 6 months, respectively. Conclusion. Open-door laminoplasty using maxillofacial titanium miniplates can provide union rates comparable to other techniques. It can maintain canal expansion without failures, dislodgements, and premature closures.Advances in orthopedics. 01/2013; 2013:767343.
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ABSTRACT: To report the outcomes of a posterior hybrid decompression protocol for the treatment of cervical spondylotic myelopathy (CSM) associated with hypertrophic ligamentum flavum (HLF). Laminoplasty is widely used in patients with CSM; however, for CSM patients with HLF, traditional laminoplasty does not include resection of a pathological ligamentum flavum. This study retrospectively reviewed 116 CSM patients with HLF who underwent hybrid decompression with a minimum of 12 months of follow-up. The procedure consisted of reconstruction of the C4 and C6 laminae using CENTERPIECE plates with spinous process autografts, and resection of the C3, C5, and C7 laminae. Surgical outcomes were assessed using Japanese Orthopedic Association (JOA) score, recovery rate, cervical lordotic angle, cervical range of motion, spinal canal sagittal diameter, bone healing rates on both the hinge and open sides, dural sac expansion at the level of maximum compression, drift-back distance of the spinal cord, and postoperative neck pain assessed by visual analog scale. No hardware failure or restenosis was noted. Postoperative JOA score improved significantly, with a mean recovery rate of 65.3±15.5%. Mean cervical lordotic angle had decreased 4.9 degrees by 1 year after surgery (P<0.05). Preservation of cervical range of motion was satisfactory postoperatively. Bone healing rates 6 months after surgery were 100% on the hinge side and 92.2% on the open side. Satisfactory decompression was demonstrated by a significantly increased sagittal canal diameter and cross-sectional area of the dural sac together with a significant drift-back distance of the spinal cord. The dural sac was also adequately expanded at the time of the final follow-up visit. Hybrid laminectomy and autograft laminoplasty decompression using Centerpiece plates may facilitate bone healing and produce a comparatively satisfactory prognosis for CSM patients with HLF.PLoS ONE 01/2014; 9(4):e95482. · 3.53 Impact Factor