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Background: Finite element analysis (FEA) was performed to investigate the biomechanical differences between different adjunct fixation methods for oblique lumbar interbody fusion (OLIF) and to further analyze its effect on adjacent segmental degeneration., Methods: We built a single-segment (Si-segment) finite element model (FEM) for L4-5 and a double-segment (Do-segment) FEM for L3-5. Each complete FEM was supplemented and modified, and both developed two surgical models of OLIF with assisted internal fixation. They were OLIF with posterior bilateral percutaneous pedicle screw (TINA system) fixation (OLIF + BPS) and OLIF with lateral plate system (OLIF + LPS). The range of motion (ROM) and displacement of the vertebral body, cage stress, adjacent segment disc stress, and spinal ligament tension were recorded for the four models during flexion/extension, right/left bending, and right/left rotation by applying follower load., Results: For the BPS and LPS systems in the six postures of flexion, extension, right/left bending, and right/left rotation, the ROM of L4 in the Si-segment FEM were 0.32°/1.83°, 0.33°/1.34°, 0.23°/0.47°, 0.24°/0.45°, 0.33°/0.79°, and 0.34°/0.62°; the ROM of L4 in the Do-segment FEM were 0.39°/2.00°, 0.37°/1.38°, 0.23°/0.47°, 0.21°/0.44°, 0.33°/0.57°, and 0.31°/0.62°, and the ROM of L3 in the Do-segment FEM were 6.03°/7.31°, 2.52°/3.50°, 4.21°/4.38°, 4.21°/4.42°, 2.09°/2.32°, and 2.07°/2.43°. BPS system had less vertebral displacement, less cage maximum stress, and less spinal ligament tension in Si/Do-segment FEM relative to the LPS system. BPS system had a smaller upper adjacent vertebral ROM, greater intervertebral disc stress in terms of left and right bending as well as left and right rotation compared to the LPS system in the L3-4 of the Do-segment FEM. There was little biomechanical difference between the same fixation system in the Si/Do-segment FEM., Conclusions: Our finite element analysis showed that compared to OLIF + LPS, OLIF + BPS (TINA) is more effective in reducing interbody stress and spinal ligament tension, and it better maintains the stability of the target segment and provides a better fusion environment to resist cage subsidence. However, OLIF + BPS (TINA) may be more likely to cause adjacent segment degeneration than OLIF + LPS., (© 2024. The Author(s).)

Objective: To compare the cervical sagittal balance and surgical outcomes between anterior cervical discectomy and fusion (ACDF) and hybrid decompression and fusion (HDF; 1-level corpectomy combined with 1-level discectomy) for consecutive 3-level cervical spondylotic myelopathy (CSM)., Methods: From January 2013 to June 2016, 82 patients with 3-level CSM who underwent ACDF (n = 40) and HDF (n = 42) were retrospectively reviewed. Perioperative parameters, clinical outcomes, and radiologic sagittal alignment were analyzed and compared., Results: Patients were followed up for 35.5 ± 6.5 months (range, 25-53 months). All patients had achieved significant improvement in Neck Disability Index and Japanese Orthopedic Association scores after operation, with similar clinical outcomes between both groups (P > 0.05). In the ACDF group, 2 patients were found with axial symptoms, and 1 with hoarseness. In the HDF group, 5 patients were found with axial symptoms, 1 with hoarseness, 1 with dysphagia, and 1 with pseudarthrosis. The ACDF group had less operation time and bleeding compared with the HDF group (P < 0.05). The restoration of segmental and C2-7 lordosis were significantly greater in the ACDF group than the HDF group (P < 0.05). The C2-7 sagittal vertical axis and T1 slope minus C2-7 lordosis decreased in the ACDF group at final follow-up (P < 0.05); however, there was no obvious change in those of the HDF group (P > 0.05)., Conclusions: Both ACDF and HDF were safe and effective for the treatment of 3-level CSM. ACDF showed superiority to HDF in terms of less blood loss, shorter operation time, and better postoperative sagittal balance., (Copyright © 2019 Elsevier Inc. All rights reserved.)

Design: This a retrospective study in single centre., Objective: The objective of this retrospective clinical study is to compare the long-term clinical efficacy of posterior long-segment and short-segment fixation with single-stage transpedicular debridement and fusion for the treatment of thoracolumbar spinal tuberculosis in adults., Methods: Sixty-six cases of thoracolumbar tuberculosis were treated by single-stage transpedicular debridement, bone graft fusion, and pedicle screw fixation. Thirty-five cases were under long-segment fixation (group A) and 31 cases were under short-segment fixation (group B). These patients were followed up for a minimum of five years. The clinical and radiographic results for these patients were analyzed and compared., Results: All 66 patients were completely cured during the follow-up. All patients had significant improvement of neurological condition and visual analogue scale pain scores at the final follow-up. The average operation duration and blood loss in group A were more than that in group B. Kyphosis Cobb angle of both groups was significantly corrected after surgical management. The correction rate of Cobb angle in group A was significantly higher than that in group B at the time of immediate post-operative period or the last follow-up (P < 0.05). The correction loss of group A was significantly less than that in group B (P < 0.05)., Conclusion: Both posterior long-segment and short-segment pedicle screw fixations for the treatment of thoracolumbar spinal tuberculosis have significant effects in the correction of kyphosis and the improvement of neurological function. Although the blood loss and operation time of long-segment fixation were more than that of short-segment fixation, long-segment fixation was superior to the short-segment fixation in the correction of kyphosis and the maintenance of spinal stability, especially in the prevention of long-term correction loss.

Background: The aim of this paper was to retrospectively analyze the clinical efficacy and feasibility of thoracic and lumbar spinal tuberculosis treated by single-stage posterior debridement, interbody fusion with titanium mesh cages (TMC), and combined short-segment instrumentation., Methods: Fifteen patients with no more than two vertebral bodies involving thoracic and lumbar tuberculosis were collected from January 2006 to January 2010, performed by single-stage posterior debridement, interbody fusion with TMC and posterior short-segment fixation. The clinical efficacy was evaluated based on the data of the 10-point Visual Analogue Scale (VAS), neurological status, kyphosis angle, erythrocyte sedimentation rate, and C-reactive protein, which were collected at a certain time., Results: The average duration of surgery was 135 minutes. All the patients were followed up for a period ranging from 18 to 48 months (mean 28.9±6.44 months). The VAS score was improved from 8.47±1.13 (range 7-10) before surgery to 2.1±1.7 (range 0-2) after surgery. Correction of segmental kyphotic deformity was 24.2±6.59°. Neither the postoperative change of the position of titanium mesh cage nor any posterior instrumentation failure was recorded. The situation of 13 patients with incomplete neurologic lesions before surgery was improved after surgery., Conclusions: Patients with thoracic and lumbar spinal tuberculosis can be successfully treated by posterior debridement, interbody fusion with TMC combining short-segment instrumentation. The presence of the TMC anteriorly at the site of tubercular spondylitis has no negative influence on the course of infection healing, and additionally they stabilize the affected segment maintaining sufficient sagittal profile.

Aim: The aim of this retrospective clinical study is to evaluate the long-term outcomes for single-stage transpedicular debridement, posterior instrumentation and fusion in the management of thoracic and thoracolumbar spinal tuberculosis in adults., Methods: Fifty-nine adult patients with thoracic and thoracolumbar spinal tuberculosis underwent single-stage transpedicular debridement, posterior instrumentation and fusion. These patients were followed for a minimum of 5 years. Patients were assigned to one of two groups according to the infected anatomic segment. In the thoracic spinal tuberculosis group, there were 28 cases (17 males, 11 females) with a mean age of 38.9 years; in the thoracolumbar spinal tuberculosis group, there were 31 cases (19 males, 12 females) with a mean age of 40.3 years. All cases were evaluated clinically using the visual analog scale (VAS), Kirkaldy-Willis criteria and the American Spinal Injury Association (ASIA) impairment scale. Radiographs were performed for measuring the angle of kyphosis and scoliosis. Complications related to surgery were recorded., Results: All patients successfully resolved their infections, experienced one or more ASIA grades of improvement, and improved in their VAS pain scores at final follow-up. In both groups, patient-reported outcomes reached over 90% excellent or good results using Kirkaldy-Willis criteria. The loss of kyphotic angle correction was 2.6° in the thoracic spinal tuberculosis group and 3.2° in the thoracolumbar spinal tuberculosis group. No scoliosis was observed in either group. Fifty-eight (98.3%) cases achieved solid bony fusion. In the thoracolumbar spinal tuberculosis group, one patient experienced screw loosening, and another patient with nonunion and rod breakage underwent revision surgery., Conclusions: The technique of single-stage transpedicular debridement, posterior instrumentation and fusion is an effective method for the treatment of thoracic and thoracolumbar spinal tuberculosis in adults. Long-term postoperative clinical and radiological outcomes were satisfactory.

Background: There is limited evidence to guide treatment for pediatric cervical spinal tuberculosis with kyphosis (PCSTK). This study retrospectively evaluates the safety, feasibility and efficacy of 360-degree arthrodesis combined with anterior debridement and decompression for treating PCSTK, while simultaneously emphasizing the role of posterior fixation for the correction and maintenance of the kyphosis angle., Methods: From May 2006 to December 2012, a total of 12 children with PCSTK underwent 360-degree cervical spinal arthrodesis followed by debridement of focus and decompression of the spinal cord. Data on the angle of kyphosis correction, visual analogue scale scores of pain, the American Spinal Injury Association scoring system of nerve function scores, erythrocyte sedimentation rate (ESR) and body weight were collected at certain periods. Clinical efficacy was evaluated by statistical analysis based on collected data., Results: Average follow-up period was 34.3 ± 8.6 months. No postoperative complications related to the instrumentation occurred, and neurologic function improved in various degrees. Preoperative kyphosis angle was 41.4 ± 5.2°, and significantly decreased to -4.9 ± 4.9° after surgery. The correction of kyphosis and loss of correction were 47.1 ± 4.9° and 0.6 ± 1.4°, respectively. Average pretreatment ESR was 49.8 ± 13.2 mm/h, which normalized (8.5 ± 0.6 mm/h) within three months in all patients. Average preoperative visual analogue scale was 6.6 ± 1.6, which decreased to 2.3 ± 1.4 postoperatively and 0.3 ± 0.5 during the final follow-up. Mean preoperative body weight was 25.9 ± 5.1 kg, and body weight was 33.5 ± 4.8 kg at the third month of post-operation. Bone healing was achieved in all patients after a mean period of 5.4 months., Conclusions: 360-degree arthrodesis combined with anterior debridement and decompression is a safe and effective method for the treatment of PCSTK. For the correction and maintenance of the kyphosis angle, additional posterior fixation is recommended.

Objective: To evaluate the clinical efficacy and feasibility of twenty patients with cervical tubercular spondylitis with kyphosis (CTSK) treated by halo traction, single-segment circumferential instrumented fusion combined anterior debridement, decompression and bone grafting., Methods: Retrospective review of data on twenty patients who suffered from CTSK admitted to our hospital between January 2007 and December 2012. All of them were performed by halo traction, single-segment circumferential instrumented fusion (anterior titanium plate and posterior pedicle or lateral mass fixation) combined anterior debridement, decompression and titanium mesh cage (TMC) filled with allograft bone particles. X-ray and computed tomographic (CT) images were used to determined sagittal balance and bone fusion. The clinical efficacy was evaluated using statistical analysis about the visual analogue scale (VAS) scores of pain, neurological status according to the Frankel classification and erythrocyte sedimentation rate (ESR), which were collected at certain time., Results: The average follow-up period was 34.1 ± 7.0 months (24-48 months). In the 20 cases, no obvious postoperative complications related to instrumentation and bone grafting and neurologic function was improved in various degrees. The average pretreatment ESR was 46.4 ± 21.7 mm/h, which got normal within 3 months in all patients. The average VAS on admission was 6.7 ± 1.7, which decreased to 1.6 ± 1.1 postoperatively. All patients got bony fusion within 3.4-5.5 months after surgery. The Cobb angle of 30.8 ± 10.5° on admission reduced to 2.9 ± 3.9° performed by preoperative halo traction, became to -5.1 ± 4.0° after operation and remained at -4.3 ± 3.8°, with 0.9 ± 0.7° of correction loss., Conclusions: Halo traction, single-segment circumferential instrumented fusion combined anterior debridement, decompression and TMC can be an effective and safe treatment method for the treatment of cervical tubercular spondylitis with kyphosis and the preoperative halo traction should be laid on much emphasis., (Copyright © 2015 Elsevier B.V. All rights reserved.)

Background: There are quite a few controversies on the surgical management of single-segment thoracic spinal tuberculosis with neurological deficits (STSTND). In this study, the clinical efficacy and feasibility of one-stage posterior-only transpedicular debridement, interbody fusion, and posterior instrumentation for treating STSTND in adults were retrospectively evaluated., Methods: Thirty-four cases with STSTND underwent one-stage posterior-only transpedicular debridement, interbody fusion and posterior instrumentation at the same institution from January 2003 to January 2013. Follow-up time was 34.4 ± 10.2 months (range, 18-48 months), and kyphosis angle was 34.1 ± 12.3°. The American Spinal Injury Association (ASIA) classification of spinal cord injury was employed to evaluate neurological deficits, while visual analogue scale (VAS) was employed to assess the degree of pain. Erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) were used to evaluate the activity of tuberculosis (TB)., Results: All 34 patients with spinal tuberculosis (ST) were completely cured, and there was no recurrence of TB. Postoperative kyphosis angle was 8.2 ± 1.8°, and there was no significant loss of correction during the final follow-up. Solid fusion was achieved and pain was relieved in all cases. Neurological condition in all patients improved after surgery., Conclusions: One-stage posterior-only transpedicular debridement, interbody fusion, and posterior fixation followed by chemotherapy seems to be adequate for obtaining satisfactory healing of single-segment thoracic spinal tuberculosis with neurological deficits. Careful patient selection is critical to the successful outcome with this technique.

Purpose: To investigate the clinical efficacy and feasibility of surgical treatment for lumbosacral junction tuberculosis by one-stage posterior debridement, interbody fusion, lumbopelvic fixation, and postural drainage., Methods: A total of 15 cases with lumbosacral junction tuberculosis treated by one-stage posterior debridement, interbody fusion, lumbopelvic fixation, and postural drainage in our center from January 2005 to October 2011 were studied. Lumbosacral angle, visual analog scale (VAS), and neurological performance were assessed before and after surgery., Results: All patients were followed for 28-56 months post-operation (average, 40.7 ± 7.7 months). No severe complications occurred. Bone fusion occurred in all patients at a mean of 8.4 months (range 6-12 months) after surgery. The mean lumbosacral angle was significantly increased from the mean preoperative angle (20.9° ± 1.8°) both post-operatively (26.5° ± 1.6°) and at final follow-up (25.3° ± 1.4°) (both P < 0.05). All patients had significant post-operative improvement in neurological performance and VAS scores., Conclusions: Our results suggest that one-stage posterior debridement, interbody fusion, lumbopelvic fixation, and postural drainage can be an effective and feasible treatment option for lumbosacral junction tuberculosis, offering fewer complications and a better quality of life.

Purpose: The correction of severe post-tubercular kyphosis (PTK) is complex and has the disadvantage of being multistaged with a high morbidity. In this study, we evaluated the outcomes of children who underwent single-stage closing-opening wedge osteotomy as a surgical treatment of PTK of the thoracolumbar spine., Method: Our study group included 12 children with thoracolumbar PTK (seven boys and five girls) with an average age of 9.4 years (range 6-12 years), who were treated at our institution from January 2004 to October 2009. The American Spinal Injury Association Impairment Scale and visual analog scale score were used to classify neurologic function. All patients underwent halo-pelvic traction before surgery and were treated with single-stage closing-opening wedge osteotomy., Result: The duration of surgery averaged 99 min (range 70-150 min). Average blood loss was 782 ml (range 560-1,200 ml), and the average length of hospital stay was 12 days (range 8-16 days). The neurological function of all patients improved significantly after the procedure. The mean preoperative kyphotic angle was 83.3° (range 59-118°), which had reduced to 27.6° (range 20-38°) at the final follow-up visit. All patients had solid fusion, and no major complications were observed through the final follow-up visit., Conclusion: Single-stage closing-opening wedge osteotomy is an effective method to correct severe thoracolumbar PTK. A main advantage of the procedure is that it is a posterior-only, single-staged surgery, allowing for significant correction with minimal complications.

Purpose: To investigate the clinical efficacy and feasibility of one-stage surgical treatment for thoracic spinal tuberculosis with adjacent segments lesion by internal fixation, transpedicular debridement, and combined interbody and posterior fusion via a posterior-only approach., Materials and Methods: Twenty-one patients (thirteen males, eight females) with thoracic tuberculosis whose lesions were confined to two adjacent segments were studied retrospectively. All patients were treated with one-stage surgical treatment by internal fixation, transpedicular debridement, and combined interbody and posterior fusion via a posterior-only approach. The American Spinal Injury Association (ASIA) impairment scale was used to assess neurological function. Thoracic Cobb angle was used to assess thoracic kyphosis. Operating time, blood loss, complications, neurological function, deformity correction and interbody fusion were investigated., Results: Average mean operating time was 231.4 ± 31.9 min, and evaluated blood loss during operation was 880.2 ± 112.7 ml. All patients were followed up for 22-41 months postoperatively (average 29.8 ± 5.4 months). All patients had significant postoperative improvement in ASIA classification scores. The thoracic kyphotic angles were significantly decreased to 9°-25° postoperatively (average 16.7° ± 4.4°), and at final follow-up were 10°-27°(average 17.7° ± 4.4°). No severe complications or spinal cord injury occurred. The erythrocyte sedimentation rate recovered to normal within 3 months postoperatively in all patients. All patients got bony fusion within 6-9 months after surgery., Conclusions: One-stage transpedicular debridement, posterior instrumentation and combined interbody and posterior fusion via a posterior-only approach can be an effective and feasible treatment method for thoracic spinal tuberculosis.

Purpose: Retrospective analysis of the clinical efficacy and feasibility of patients with thoracolumbar spinal tuberculosis with psoas abscesses treated by one-stage posterior transforaminal lumbar debridement, interbody fusion, posterior instrumentation, and postural drainage., Method: A total of 18 patients with thoracolumbar tuberculosis (TB), between February 2007 and February 2011, underwent one-stage posterior transforaminal lumbar debridement, interbody fusion, posterior instrumentation, and postural drainage. And the clinical efficacy was evaluated based on surgery duration time, the blood loss, the postural drainage of time, neurological status that was recorded by American Spinal Injury Association (ASIA) Impairment Scale, the fate of bone graft fusion, kyphosis angle, erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP), which were collected at certain time., Results: The average follow-up period was 34 months (range 18-48 months). 18 patients suffered from seriously neurological deficits pre-operatively, of which 16 patients returned to normal at final follow-up. The surgery duration time was 197 ± 37.9 min, and the blood loss was 815 ± 348.5 ml. The postural drainage of time was 7.2 ± 2.7 days. The psoas abscesses disappeared in all cases, within the time range of 6-9 months (mean 7.4 ± 1.2 months). All patients of the grafted bones were thoroughly fused, with a fusion time ranging from 4 to 12 months (mean 7.8 months). Kyphosis angle was 44.32 ± 7.26° on average pre-operative and returned to 11.72 ± 2.85° at 6 weeks after operation; kyphosis angle was 13.10 ± 2.39° at final follow-up. The values of ESR and CRP were significant declined at 6 weeks post-operative, and returned to normal levels at final follow-up., Conclusion: With standardized anti-TB chemotherapy, thoracolumbar spinal tuberculosis with psoas abscesses could be effectively treated by one-stage posterior transforaminal lumbar debridement, interbody fusion, posterior instrumentation, and postural drainage.

Background: There is limited evidence to guide treatment for pediatric cervical spinal tuberculosis with kyphosis (PCSTK). This study retrospectively evaluates the safety, feasibility and efficacy of 360-degree arthrodesis combined with anterior debridement and decompression for treating PCSTK, while simultaneously emphasizing the role of posterior fixation for the correction and maintenance of the kyphosis angle. Methods: From May 2006 to December 2012, a total of 12 children with PCSTK underwent 360-degree cervical spinal arthrodesis followed by debridement of focus and decompression of the spinal cord. Data on the angle of kyphosis correction, visual analogue scale scores of pain, the American Spinal Injury Association scoring system of nerve function scores, erythrocyte sedimentation rate (ESR) and body weight were collected at certain periods. Clinical efficacy was evaluated by statistical analysis based on collected data. Results: Average follow-up period was 34.3 ± 8.6 months. No postoperative complications related to the instrumentation occurred, and neurologic function improved in various degrees. Preoperative kyphosis angle was 41.4 ± 5.2°, and significantly decreased to -4.9 ± 4.9° after surgery. The correction of kyphosis and loss of correction were 47.1 ± 4.9° and 0.6 ± 1.4°, respectively. Average pretreatment ESR was 49.8 ± 13.2 mm/h, which normalized (8.5 ± 0.6 mm/h) within three months in all patients. Average preoperative visual analogue scale was 6.6 ± 1.6, which decreased to 2.3 ± 1.4 postoperatively and 0.3 ± 0.5 during the final follow-up. Mean preoperative body weight was 25.9 ± 5.1 kg, and body weight was 33.5 ± 4.8 kg at the third month of post-operation. Bone healing was achieved in all patients after a mean period of 5.4 months. Conclusions: 360-degree arthrodesis combined with anterior debridement and decompression is a safe and effective method for the treatment of PCSTK. For the correction and maintenance of the kyphosis angle, additional posterior fixation is recommended. [ABSTRACT FROM AUTHOR]