Treatment of unstable lumbar intervertebral disc herniation by modified lamina osteotomy replantation / 中国骨伤

<p><b>OBJECTIVE</b>To evaluate the clinical effects of the modified lamina replantation for the treatment of unstable lumbar intervertebral disc herniation.</p><p><b>METHODS</b>From March 2009 to August 2011,63 patients with unstable lumbar intervertebral disc herniation were treated by discectomy, interbody fusion, pedicle screw fixation, and modified lamina replantation. There were 33 males and 30 females with an average age of 48.4 years old ranging from 22 to 68 years old. The average duration of disease was 38.8 months ranging from 3 months to 13 years. All patients had lower back and leg pains. X-ray,CT and MR results showed unstable lumbar intervertebral disc herniation. Preoperative and postoperative ODI, JOA scores, complication incident rates,radiographic healing rates,and lower back and leg pain recurrence rates were observed and recorded.</p><p><b>RESULTS</b>Sixty-two incisions were healed at first stage, 1 at second stage. There were no complications such as deep vein thrombosis, intervertebral infection and so on. Sixty-one patients were followed up for more than one year, and the mean duration was 33 months. Nerve and dural injury occurred in 2 patients and 1 patient respectively. One-year fusion happened in 58 patients while the recurrence of lower back pain and leg pain after 1 year were noted in 4 patients and 1 patient respectively. ODI, and JOA scores were respectively re-assessed at 2 weeks, 6 months and 1 year after the operation, and the results showed a significant difference from the preoperative scores (P < 0.05).</p><p><b>CONCLUSION</b>Modified lamina replantation for unstable lumbar intervertebral disc herniation showed lower rates of dural and nerve damage, as well as a higher lamina healing rate, lower back and leg pain recovery rate, and a better clinical score. It is a safe and efficient operation choice for lumbar spine surgery.</p>

Efficacy evaluation for the treatment of unstable lumbar disc herniation by traditional and modified lamina osteotomy replantation / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>The traditional lamina osteotomy replantation method is prone to nerve root injury and low back pain recurrence. Our team has proposed a modified approach that improves the osteotomy site and its fixation procedure. The aim of this study was to evaluate the clinical efficacy of traditional and modified lamina replantation methods in treating unstable lumbar disc herniation.</p><p><b>METHODS</b>From March 2008 to August 2011, 124 patients with unstable lumbar disc herniation were enrolled and randomly divided into the following two groups according to random digital table: group A (traditional group) consisting of 61 patients who underwent traditional laminectomy replantation, and group B (modified group) consisting of 63 patients who underwent modified lamina replantation. Both surgeries were performed by the same surgeons. The two groups had no significant difference in gender, age, symptoms, time of onset and the prominent segment. Visual analogue scale (VAS), Oswertry disability index (ODI), and Japanese Orthopaedic Association (JOA) scores, operative time, blood loss, complication rate, radiographic healing rates, and low back pain recurrence rates were compared between the two groups.</p><p><b>RESULTS</b>There were 121 patients followed up for more than one year, and the follow-up rate was 97.6%. Nerve injury occurred in two patients (3.3%) in the modified group and 12 patients (20.0%) in the traditional group. Dural injury occurred in one patient (1.6%) in the modified group and seven patients (11.7%) in the traditional group. Pseudarthrosis occurred in two patients in the modified group and in 18 patients in the traditional group with 1-year fusion rates of 96.7% and 70.0%, respectively. Recurrence of lower back pain after one year was noted in three patients (4.9%) in the modified group, and in 15 (25.0%) in the traditional group. Leg pain recurrence was noted in one patient (1.6%) in the modified group and in three cases (5.0%) in the traditional group. The one-year healing rates of nerve injury, dural injury, replantation lamina and low back pain recurrence rates after one year were significantly different (P < 0.05) between the two groups. At two weeks, three months, six months and one year postoperatively, both groups had significant improvement in VAS, ODI, and JOA scores from their preoperative values (P < 0.05). No significant difference was detected between the short term postoperative scores between groups A and B (P > 0.05). However, a significant difference was found one year later (P < 0.05).</p><p><b>CONCLUSIONS</b>Compared to the traditional approach, the modified technique for lamina replantation showed lower rates of dural and nerve damage, a higher lamina healing rate, a lower back pain recurrence rate, and better clinical scores. It is a safe and effective operation for lumbar spine surgery.</p>