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Kong Q, Li F, Yan C, Sun J, Sun P, Ou‐Yang J, Zhong S, Wang Y, Shi J. Biomechanical Comparison of Anterior Cervical Corpectomy Decompression and Fusion, Anterior Cervical Discectomy and Fusion, and Anterior Controllable Antedisplacement and Fusion in the Surgical Treatment of Multilevel Cervical Spondylotic Myelopathy: A Finite Element Analysis. Orthop Surg 2024; 16:687-699. [PMID: 38316415 PMCID: PMC10925493 DOI: 10.1111/os.13994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 02/07/2024] Open
Abstract
PURPOSE Multilevel cervical spondylotic myelopathy poses significant challenges in selecting optimal surgical approaches, warranting a comprehensive understanding of their biomechanical impacts. Given the lack of consensus regarding the most effective technique, this study aims to fill this critical knowledge gap by rigorously assessing and comparing the biomechanical properties of three distinct surgical interventions, including anterior controllable antedisplacement and fusion (ACAF), anterior cervical corpectomy decompression and fusion (ACCF), and anterior cervical discectomy and fusion (ACDF). The study offers pivotal insights to enhance treatment precision and patient outcomes. METHODS The construction of the cervical spine model involved a detailed process using CT data, specialized software (Mimics, Geomagic Studio, and Hypermesh) and material properties obtained from prior studies. Surgical instruments were modeled (titanium mesh, anterior cervical plate, interbody cage, and self-tapping screws) to simulate three surgical approaches: ACAF, ACCF, and ACDF, each with specific procedures replicating clinical protocols. A 75-N follower load with 2 Nm was applied to simulate biomechanical effects. RESULTS The range of motion decreased more after surgery for ACAF and ACDF than for ACCF, especially in flexion and lateral bending. ACCF have higher stress peaks in the fixation system than those of ACAF and ACDF, especially in flexion. The maximum von Mises stresses of the bone-screw interfaces at C3 of ACCF were higher than those of ACAF and ACDF. The maximum von Mises stresses of the bone-screw interfaces at C6 of ACDF were much higher than those of ACAF and ACCF. The maximum von Mises stresses of the grafts of ACCF and ACAF were much higher than those of ACDF. The maximum von Mises stresses of the endplate of ACCF were much higher than those of ACAF and ACDF. CONCLUSION The ACAF and ACDF models demonstrated superior cervical reconstruction stability over the ACCF model. ACAF exhibited lower risks of internal fixation failure and cage subsidence compared to ACCF, making it a promising approach. However, while ACAF revealed improved stability over ACCF, higher rates of subsidence and internal fixation failure persisted compared to ACDF, suggesting the need for further exploration of ACAF's long-term efficacy and potential improvements in clinical outcomes.
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Affiliation(s)
- Qingjie Kong
- Department of Orthopedics, Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Fudong Li
- Department of Orthopedic Surgery, Spine Center, Shanghai Changzheng HospitalSecond Military Medical UniversityShanghaiChina
| | - Chen Yan
- Department of Orthopedic Surgery, Spine Center, Shanghai Changzheng HospitalSecond Military Medical UniversityShanghaiChina
| | - Jingchuan Sun
- Department of Orthopedic Surgery, Spine Center, Shanghai Changzheng HospitalSecond Military Medical UniversityShanghaiChina
| | - Peidong Sun
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Department of AnatomySouthern Medical UniversityGuangzhouChina
| | - Jun Ou‐Yang
- Department of Orthopedic Surgery, Spine Center, Shanghai Changzheng HospitalSecond Military Medical UniversityShanghaiChina
| | - Shizhen Zhong
- Guangdong Provincial Key Laboratory of Medical Biomechanics, Department of AnatomySouthern Medical UniversityGuangzhouChina
| | - Yuan Wang
- Department of Orthopedic Surgery, Spine Center, Shanghai Changzheng HospitalSecond Military Medical UniversityShanghaiChina
| | - Jiangang Shi
- Department of Orthopedic Surgery, Spine Center, Shanghai Changzheng HospitalSecond Military Medical UniversityShanghaiChina
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Reitman CA, Hills JM, Standaert CJ, Bono CM, Mick CA, Furey CG, Kauffman CP, Resnick DK, Wong DA, Prather H, Harrop JS, Baisden J, Wang JC, Spivak JM, Schofferman J, Riew KD, Lorenz MA, Heggeness MH, Anderson PA, Rao RD, Baker RM, Emery SE, Watters WC, Sullivan WJ, Mitchell W, Tontz W, Ghogawala Z. Cervical fusion for treatment of degenerative conditions: development of appropriate use criteria. Spine J 2021; 21:1460-1472. [PMID: 34087478 DOI: 10.1016/j.spinee.2021.05.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT High quality evidence is difficult to generate, leaving substantial knowledge gaps in the treatment of spinal conditions. Appropriate use criteria (AUC) are a means of determining appropriate recommendations when high quality evidence is lacking. PURPOSE Define appropriate use criteria (AUC) of cervical fusion for treatment of degenerative conditions of the cervical spine. STUDY DESIGN/SETTING Appropriate use criteria for cervical fusion were developed using the RAND/UCLA appropriateness methodology. Following development of clinical guidelines and scenario writing, a one-day workshop was held with a multidisciplinary group of 14 raters, all considered thought leaders in their respective fields, to determine final ratings for cervical fusion appropriateness for various clinical situations. OUTCOME MEASURES Final rating for cervical fusion recommendation as either "Appropriate," "Uncertain" or "Rarely Appropriate" based on the median final rating among the raters. METHODS Inclusion criteria for scenarios included patients aged 18 to 80 with degenerative conditions of the cervical spine. Key modifiers were defined and combined to develop a matrix of clinical scenarios. The median score among the raters was used to determine the final rating for each scenario. The final rating was compared between modifier levels. Spearman's rank correlation between each modifier and the final rating was determined. A multivariable ordinal regression model was fit to determine the adjusted odds of an "Appropriate" final rating while adjusting for radiographic diagnosis, number of levels and symptom type. Three decision trees were developed using decision tree classification models and variable importance for each tree was computed. RESULTS Of the 263 scenarios, 47 (17.9 %) were rated as rarely appropriate, 66 (25%) as uncertain and 150 (57%) were rated as appropriate. Symptom type was the modifier most strongly correlated with the final rating (adjusted ρ2 = 0.58, p<.01). A multivariable ordinal regression adjusting for symptom type, diagnosis, and number of levels and showed high discriminative ability (C statistic = 0.90) and the adjusted odds ratio (aOR) of receiving a final rating of "Appropriate" was highest for myelopathy (aOR, 7.1) and radiculopathy (aOR, 4.8). Three decision tree models showed that symptom type and radiographic diagnosis had the highest variable importance. CONCLUSIONS Appropriate use criteria for cervical fusion in the setting of cervical degenerative disorders were developed. Symptom type was most strongly correlated with final rating. Myelopathy or radiculopathy were most strongly associated with an "Appropriate" rating, while axial pain without stenosis was most associated with "Rarely Appropriate."
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Affiliation(s)
- Charles A Reitman
- Baylor College of Medicine, 7200 Cambridge Street Suite 10A 10th Floor, Houston, TX 77030-4202, USA.
| | - Jeffrey M Hills
- Washington University Orthopaedics, 660 S. Euclid Avenue Campus Box 8233, Saint Louis, MO 63110-1010, USA
| | | | - Christopher M Bono
- Department of Orthopaedic Surgery, Brigham & Women's Hospital, 75 Francis Street, Boston, MA 02115-6110, USA
| | - Charles A Mick
- Pioneer Spine & Sports, 766 N. King Street, Northampton, MA 01060-1142, USA
| | - Christopher G Furey
- Case Western Reserve University, 11100 Euclid Avenue, Cleveland, OH 44106-1716, USA
| | | | - Daniel K Resnick
- Department Neurosurgery, University of Wisconsin Medical School, 600 Highland K4/834 Clinical Science Center, Madison, WI 53792-0001, USA
| | - David A Wong
- Denver Spine Surgeons, 7800 E. Orchard Road Ste. 100, Greenwood Village, CO 80111-2584, USA
| | - Heidi Prather
- C/O Melissa Armbrecht, Washington University in St. Louis-School of Medicine, 660 S. Euclid Campus Box 8233, Saint Louis, MO 63110, USA
| | - James S Harrop
- Thomas Jefferson University, 909 Walnut Street Floor 2, Philadelphia, PA 19107-5211, USA
| | - Jamie Baisden
- Department of Neurosurgery, Medical College of Wisconsin, 9200 W. Wisconsin Avenue, Milwaukee, WI 53226-3522, USA
| | - Jeffrey C Wang
- USC Spine Center, 1520 San Pablo Street Ste. 2000, Los Angeles, CA 90033-5322, USA
| | | | - Jerome Schofferman
- SpineCare Medical Group, 455 Hickey Boulevard #310, Daly City, CA 94015-2204, USA
| | - K Daniel Riew
- 425 S Euclid Avenue Ste. 5505, Saint Louis, MO 63110-1005, USA
| | - Mark A Lorenz
- Hinsdale Orthopaedic Associates, 550 W. Ogden Avenue, Hinsdale, IL 60521-3186, USA
| | - Michael H Heggeness
- University of Kansas SOM-Wichita Orthopaedic Surgery Residency Office, 929 N. Saint Francis Street Room 4076, Via Christi Regional Medical Center, Wichita, KS 67214-3821, USA
| | - Paul A Anderson
- University of Wisconsin Orthopedics & Rehabilitation, 1685 Highland Avenue Floor 6, Madison, WI 53705-2281, USA
| | - Raj D Rao
- Department of Orthopedic Surgery, Medical College of Wisconsin, 9200 W Wisconsin Avenue, Milwaukee, WI 53226-3522, USA
| | - Ray M Baker
- Washington Interventional Spine Associates, 11800 NE 128th Street,Ste. 200 MS 65, Kirkland, WA 98034-7211, USA
| | - Sanford E Emery
- Department of Orthopaedics, West Virginia University, PO Box 9196, Morgantown, WV 26506-9196, USA
| | - William C Watters
- Bone and Joint Clinic of Houston, 6624 Fannin Street Ste. 2600, Houston, TX 77030-2338, USA
| | - William J Sullivan
- Denver VA Medical Center, 1055 N. Clermont 2B-124, Denver, CO, 80220, USA
| | - William Mitchell
- Coastal Spine, 4000 Church Road, Mount Laurel, NJ 08054-1110, USA
| | | | - Zoher Ghogawala
- Department of Neurosurgery, Lahey Hospital & Medical Center, 41 Mall Road Charles A, Tufts University School of Medicine, Burlington, MA 01805-0105, USA
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Lee BH, Park JH, Lee JY, Jeon HJ, Park SW. Efficiency of minimal oblique resection of the uncinate process during an anterior cervical discectomy and fusion. Medicine (Baltimore) 2021; 100:e26790. [PMID: 34397831 PMCID: PMC8341223 DOI: 10.1097/md.0000000000026790] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 07/09/2021] [Indexed: 01/04/2023] Open
Abstract
Hypertrophy of the uncinate process (UP) can cause radiculopathy. Minimal UP resection is considered to remove the lesion while minimizing the risk of complications. This study aimed to elucidate the surgical results of minimal oblique resection of the UP. This study is a retrospective review of about sixty segments in 34 patients who underwent anterior cervical discectomy and fusion (ACDF) with minimal oblique uncinectomy between 2016 and 2018. The cross-sectional area of the UP was measured pre- and postoperatively. The interspinous distance, segmental Cobb angle, subsidence, fusion rate, surgical time, estimated blood loss, and postoperative complications were evaluated. The mean resected areas of the UP were 17.4 ± 8.7 mm2 (25.9%) on the right and 17.3 ± 11.2 mm2 (26.2%) on the left. The difference in interspinous distance in flexion-extension was 7.1 ± 3.2 and 1.6 ± 0.6 mm pre- and postoperatively, respectively (P = .000). The fusion rate after ACDF was 91.7% when measured according to segment (55/60) and 91.2% when measured according to patients (31/34). The difference in the segmental Cobb angle in flexion-extension was 8.3 ± 6.2° and 1.9 ± 0.3° pre and postoperatively, respectively (P = .000). Subsidence occurred in 4 (11.8%) patients and 5 (8.3%) segments. The average surgical time per segment was 68.8 ± 9.3 minute, and the estimated blood loss was 48.5 ± 25.0 mL. Postoperative complications comprised 1 case each of neck swelling, wound infection, pneumonia, and gastrointestinal bleeding. Our findings therefore revealed that minimal oblique uncinectomy during an ACDF can maintain the stability of the uncovertebral joint while sufficiently decompressing the neural foramen.
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Affiliation(s)
- Byoung Hun Lee
- Department of Neurosurgery, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
- Graduate School of Kangwon National University, Republic of Korea
| | - Jong Hwa Park
- Department of Neurosurgery, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
| | - Jong Young Lee
- Department of Neurosurgery, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
| | - Hong Jun Jeon
- Department of Neurosurgery, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
| | - Seung-Woo Park
- Departments of Neurosurgery, Kangwon National University Hospital, Chuncheon, Republic of Korea
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Comparative Analysis of 2 Different Types of Titanium Mesh Cage for Single-level Anterior Cervical Corpectomy and Fusion in Terms of Postoperative Subsidence and Sagittal Alignment. Clin Spine Surg 2020; 33:E8-E13. [PMID: 31913177 DOI: 10.1097/bsd.0000000000000938] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
STUDY DESIGN This was a retrospective observatory analysis study. OBJECTIVE The objective of this study was to compare the differences in clinical and radiologic outcomes among patients who underwent anterior cervical corpectomy and fusion (ACCF) using titanium mesh cage (TMC) with end-caps and patients who underwent ACCF using TMC without end-cap. SUMMARY OF BACKGROUND DATA TMC has been widely used as an effective treatment option for ACCF. However, the subsidence of TMC has been observed frequently in the early postoperative period in some cases, resulting in related clinical complications. MATERIALS AND METHODS Patients who underwent single-level ACCF using TMC from September 2008 to June 2014 at our institute were retrospectively reviewed. Patients treated with TMC with end-cap were classified as an end-cap group, while patients treated with TMC without end-cap classified as a control group. The round press-fit-type end-caps with 2.5-degree angulation were used at both ends of the cage for the end-cap group. Patients were followed postoperatively for a minimum of 36 months with radiologic evaluation. RESULTS The subsidence was lower in the end-cap group (4.3±3.6 vs. 4.8±3.0, P<0.01), with lower rates of severe subsidence (≥3 mm) than the control group (34.2% vs. 52.1%, P<0.01). Visual analogue scale (VAS) scores for neck pain and Neck Disability Index (NDI) was reported significantly less in the study group, which showed a positive correlation with lesser severe subsidence. Also, the characteristics of subsidence differed between the 2 groups. In the end-cap group, slippage type subsidence occurred, resulting in better sagittal alignment than that in the control group. CONCLUSIONS For patients undergoing single-level ACCF, using TMC with end-cap provided better clinical results and similar fusion rate, compared with using TMC without end-cap. The end-cap decreased the severity of postoperative subsidence and related neck pain. Also, sagittal alignment was well preserved, suggesting it may contribute to cervical lordosis.
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Wei L, Cao P, Xu C, Wu H, Hua D, Tian Y, Yuan W. Comparison of Three Anterior Techniques in the Surgical Treatment of Three-Level Cervical Spondylotic Myelopathy with Intramedullary T2-Weighted Increased Signal Intensity. World Neurosurg 2019; 126:e842-e852. [DOI: 10.1016/j.wneu.2019.02.182] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/18/2019] [Accepted: 02/19/2019] [Indexed: 11/25/2022]
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Hou Y, Liang L, Shi GD, Xu P, Xu GH, Shi JG, Yuan W. Comparing effects of cervical anterior approach and laminoplasty in surgical management of cervical ossification of posterior longitudinal ligament by a prospective nonrandomized controlled study. Orthop Traumatol Surg Res 2017; 103:733-740. [PMID: 28619269 DOI: 10.1016/j.otsr.2017.05.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Revised: 03/11/2017] [Accepted: 05/16/2017] [Indexed: 02/02/2023]
Abstract
INTRODUCTION The laminoplasty has been the most widely used surgical method for OPLL. In recent years, increasing attention has been drawn to the anterior operative approaches for surgical treatment of cervical OPLL. However, which method is the optimum selection for therapy of cervical OPLL is still obscure. Therefore, we performed this prospective nonrandomized clinical study in patients with multilevel cervical myelopathy due to OPLL and compare the therapeutic efficiency of laminoplasty and anterior approach (cervical discectomy and/or cervical corpectomy) in the management of multilevel cervical OPLL. HYPOTHESIS There is no difference in clinical effects between anterior cervical spine surgery and laminoplasty in the treatment of multilevel cervical OPLL. MATERIAL AND METHODS A total of 150 consecutive patients with multilevels of cervical OPLL underwent anterior approaches (ACDF, ACCF and HDF) from July 2010 to June 2014, which were enrolled in this study. During the same period, one hundred and two patients receiving the laminoplasty were enrolled in the study. The clinical effects, alignment and range of motion (ROM) of cervical spine in patients of the anterior group and posterior group were assessed, respectively. The effects of high signals in T2 weighed MRI scans and percentage of spinal canal stenosis in these patients were also evaluated. Finally, postoperative complications regarding each group were analyzed. RESULTS Although significant differences in types of OPLL and preoperative sagittal alignment of cervical spine occurred in the two groups (P<0.05), clinical effects of the two groups were similar (P>0.05). The cervical curvature in laminoplasty group showed significant decrease at final follow-up (P<0.05). For ROM of cervical spine, no significant alteration was observed in both groups. The high T2 weighed signals and rate of spinal canal stenosis can influence clinical effects of both anterior group and laminoplasty group. In addition, significantly higher complication rate was observed in laminoplasty group compared with anterior group (P<0.05). DISCUSSION Both anterior and laminoplasty approaches can be considered effective and safe procedures in the treatment of the multilevel OPLL. However, the anterior approach with relatively lower incidence of postoperative complications is a better choice for cases with poor cervical curvature and serious spinal canal stenosis. TYPE OF STUDY AND LEVEL OF PROOF Level 3 nonrandomized, controlled clinical trials.
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Affiliation(s)
- Y Hou
- Department of Orthopaedic Surgery, Changzheng Hospital, No. 415, Feng Yang Road, 200003 Shanghai, China
| | - L Liang
- Department of Orthopaedic Surgery, Changzheng Hospital, No. 415, Feng Yang Road, 200003 Shanghai, China
| | - G D Shi
- Department of Orthopaedic Surgery, Changzheng Hospital, No. 415, Feng Yang Road, 200003 Shanghai, China
| | - P Xu
- Department of Orthopaedic Surgery, Changzheng Hospital, No. 415, Feng Yang Road, 200003 Shanghai, China
| | - G H Xu
- Department of Orthopaedic Surgery, Changzheng Hospital, No. 415, Feng Yang Road, 200003 Shanghai, China
| | - J G Shi
- Department of Orthopaedic Surgery, Changzheng Hospital, No. 415, Feng Yang Road, 200003 Shanghai, China.
| | - W Yuan
- Department of Orthopaedic Surgery, Changzheng Hospital, No. 415, Feng Yang Road, 200003 Shanghai, China
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Fehlings MG, Tetreault LA, Kurpad S, Brodke DS, Wilson JR, Smith JS, Arnold PM, Brodt ED, Dettori JR. Change in Functional Impairment, Disability, and Quality of Life Following Operative Treatment for Degenerative Cervical Myelopathy: A Systematic Review and Meta-Analysis. Global Spine J 2017; 7:53S-69S. [PMID: 29164033 PMCID: PMC5684851 DOI: 10.1177/2192568217710137] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
STUDY DESIGN Systematic review. OBJECTIVES The primary objective of this systematic review was to define the change in impairment, disability, and pain following surgical intervention in patients with degenerative cervical myelopathy (DCM). Secondary objectives included to assess the impact of preoperative disease severity and duration of symptoms on outcomes and to summarize complications associated with surgery. METHODS A systematic literature search was conducted to identify prospective studies evaluating the effectiveness and safety of operative treatment in patients with DCM. Outcomes of interest were functional status, disability, pain, and complications. The quality of each study was evaluated using the Newcastle-Ottawa Scale, and the strength of the overall body of evidence was rated using guidelines outlined by the Grading of Recommendation Assessment, Development and Evaluation (GRADE) Working Group. RESULTS Of the 385 retrieved citations, 32 met inclusion criteria and are summarized in this review. Based on our results, pooled standard mean differences showed a large effect for improvement in Japanese Orthopaedic Association or modified Japanese Orthopaedic Association score from baseline at short-, medium-, and long-term follow-up: 6 to 12 months (1.92; 95% confidence interval [CI] = 1.41 to 2.43), 13 to 36 months (1.40; 95% CI = 1.12 to 1.67), and ≥36 months (1.92; 95% CI = 1.14 to 2.69) (moderate evidence). Surgery also resulted in significant improvements in Nurick, Neck Disability Index, and Visual Analogue Scale scores (low to very low evidence). The cumulative incidence of complications was low (14.1%; 95% CI = 10.1% to 18.2%). CONCLUSION Surgical intervention for DCM results in significant improvements in functional impairment, disability, and pain and is associated with an acceptably low rate of complications.
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Affiliation(s)
- Michael G. Fehlings
- Toronto Western Hospital, Toronto, Ontario, Canada
- University of Toronto, Toronto, Ontario, Canada
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Fehlings MG, Tetreault LA, Riew KD, Middleton JW, Aarabi B, Arnold PM, Brodke DS, Burns AS, Carette S, Chen R, Chiba K, Dettori JR, Furlan JC, Harrop JS, Holly LT, Kalsi-Ryan S, Kotter M, Kwon BK, Martin AR, Milligan J, Nakashima H, Nagoshi N, Rhee J, Singh A, Skelly AC, Sodhi S, Wilson JR, Yee A, Wang JC. A Clinical Practice Guideline for the Management of Patients With Degenerative Cervical Myelopathy: Recommendations for Patients With Mild, Moderate, and Severe Disease and Nonmyelopathic Patients With Evidence of Cord Compression. Global Spine J 2017; 7:70S-83S. [PMID: 29164035 PMCID: PMC5684840 DOI: 10.1177/2192568217701914] [Citation(s) in RCA: 243] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
STUDY DESIGN Guideline development. OBJECTIVES The objective of this study is to develop guidelines that outline how to best manage (1) patients with mild, moderate, and severe myelopathy and (2) nonmyelopathic patients with evidence of cord compression with or without clinical symptoms of radiculopathy. METHODS Five systematic reviews of the literature were conducted to synthesize evidence on disease natural history; risk factors of disease progression; the efficacy, effectiveness, and safety of nonoperative and surgical management; the impact of preoperative duration of symptoms and myelopathy severity on treatment outcomes; and the frequency, timing, and predictors of symptom development. A multidisciplinary guideline development group used this information, and their clinical expertise, to develop recommendations for the management of degenerative cervical myelopathy (DCM). RESULTS Our recommendations were as follows: (1) "We recommend surgical intervention for patients with moderate and severe DCM." (2) "We suggest offering surgical intervention or a supervised trial of structured rehabilitation for patients with mild DCM. If initial nonoperative management is pursued, we recommend operative intervention if there is neurological deterioration and suggest operative intervention if the patient fails to improve." (3) "We suggest not offering prophylactic surgery for non-myelopathic patients with evidence of cervical cord compression without signs or symptoms of radiculopathy. We suggest that these patients be counseled as to potential risks of progression, educated about relevant signs and symptoms of myelopathy, and be followed clinically." (4) "Non-myelopathic patients with cord compression and clinical evidence of radiculopathy with or without electrophysiological confirmation are at a higher risk of developing myelopathy and should be counselled about this risk. We suggest offering either surgical intervention or nonoperative treatment consisting of close serial follow-up or a supervised trial of structured rehabilitation. In the event of myelopathic development, the patient should be managed according to the recommendations above." CONCLUSIONS These guidelines will promote standardization of care for patients with DCM, decrease the heterogeneity of management strategies and encourage clinicians to make evidence-informed decisions.
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Affiliation(s)
- Michael G. Fehlings
- Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada,University of Toronto, Toronto, Ontario, Canada,Michael G. Fehlings, MD, PhD, FRCSC, FACS, Division of Neurosurgery, Toronto Western Hospital, University Health Network, 399 Bathurst Street (SCI-CRU, 11th Floor McLaughlin Pavilion), Toronto, Ontario M5T 2S8, Canada.
| | - Lindsay A. Tetreault
- Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada,University College Cork, Cork, Ireland
| | - K. Daniel Riew
- Washington University School of Medicine, St Louis, MO, USA
| | | | - Bizhan Aarabi
- University of Maryland School of Medicine, Baltimore, MD, USA
| | | | | | | | | | - Robert Chen
- University of Toronto, Toronto, Ontario, Canada
| | | | | | - Julio C. Furlan
- University of Toronto, Toronto, Ontario, Canada,Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada
| | - James S. Harrop
- Jefferson Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | | | | | | | - Brian K. Kwon
- Vancouver General Hospital, Vancouver, British Columbia, Canada
| | - Allan R. Martin
- Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada
| | - James Milligan
- The Centre for Family Medicine, Kitchener, Ontario, Canada,Department of Family Medicine, McMaster University, Hamilton, Ontario, Canada,Western University, London, Ontario, Canada
| | | | - Narihito Nagoshi
- Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada,Keio University School of Medicine, Keio, Japan
| | | | - Anoushka Singh
- Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada
| | | | - Sumeet Sodhi
- Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada,University of Toronto, Toronto, Ontario, Canada
| | - Jefferson R. Wilson
- University of Toronto, Toronto, Ontario, Canada,Li Ka Shing Knowledge Institute, St Michael’s Hospital, Toronto, Ontario, Canada
| | - Albert Yee
- Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
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Bai C, Li K, Guo A, Fei Q, Li D, Li J, Wang B, Yang Y. Indication for hypertrophy posterior longitudinal ligament removal in anterior decompression for cervical spondylotic myelopathy. Medicine (Baltimore) 2017; 96:e7043. [PMID: 28591038 PMCID: PMC5466216 DOI: 10.1097/md.0000000000007043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 05/05/2017] [Accepted: 05/08/2017] [Indexed: 11/25/2022] Open
Abstract
The retrospective study aimed to investigate the indication for hypertrophy posterior longitudinal ligament (HPLL) removal in anterior decompression for cervical spondylotic myelopathy (CSM). A total of 138 consecutive patients with CSM were divided into 2 groups with developmental cervical stenosis (DCS) (group S) and non-DCS (group N), according to the Pavlov ratio. These 2 groups were subdivided into 2 further subgroups, according to whether HPLL was removed or preserved: group SR (49 patients) and group SP (32 patients) in group S, group NR (21 patients) and group NP (36 patients) in group N. The modified Japanese Orthopedic Association score (mJOA), the modified recovery rate (mRR), quality of life (QoL), and relevant clinical data were used for clinical and radiological evaluation. The mJOA scores improved from 7.3 ± 2.2 to 15.0 ± 1.8 in the SR group and from 7.9 ± 2.3 to 14.2 ± 1.5 in the SP group (P = .036), with postoperative QoL significantly higher in the SR group than the SP group. A reduction in the diameter of enlarged spinal canals occurred at a significantly faster rate in the SP group compared with the SR group (P = .002). Multivariate regression analyses showed removal of HPLL correlated with mJOA scores (coefficient = 7.337, P = .002), mRR (%) (coefficient = 9.117, P = .005), PCS (coefficient = 12.129, P < .001), and MCS (coefficient = 14.31, P < .001) in the S group at 24 months postoperatively, while removal of HPLL did not correlate with clinical outcomes in the N group. The HPLL should, therefore, be removed when mobility was reduced and the spinal cord remained compressed after anterior decompression procedures in the patients with DCS. However, in non-DCS patients, it remains unclear as to whether removal of HPLL provides any clinical benefit, thus, HPLL removal may not be necessary.
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Affiliation(s)
- Chengrui Bai
- Department of Orthopedics, Beijing Friendship Hospital Affiliated of Capital Medical University, Beijing
| | - Kanghua Li
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
| | - Ai Guo
- Department of Orthopedics, Beijing Friendship Hospital Affiliated of Capital Medical University, Beijing
| | - Qi Fei
- Department of Orthopedics, Beijing Friendship Hospital Affiliated of Capital Medical University, Beijing
| | - Dong Li
- Department of Orthopedics, Beijing Friendship Hospital Affiliated of Capital Medical University, Beijing
| | - Jinjun Li
- Department of Orthopedics, Beijing Friendship Hospital Affiliated of Capital Medical University, Beijing
| | - Bingqiang Wang
- Department of Orthopedics, Beijing Friendship Hospital Affiliated of Capital Medical University, Beijing
| | - Yong Yang
- Department of Orthopedics, Beijing Friendship Hospital Affiliated of Capital Medical University, Beijing
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A Comparison of the Anterior Approach and the Posterior Approach in Treating Multilevel Cervical Myelopathy: A Meta-Analysis. Clin Spine Surg 2017; 30:65-76. [PMID: 27352375 DOI: 10.1097/bsd.0000000000000398] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
STUDY DESIGN A meta-analysis. OBJECTIVE To compare the effectiveness and the safety of the anterior approach with those of the posterior approach for patients diagnosed with multilevel cervical myelopathy (MCM). SUMMARY OF BACKGROUND DATA Although many studies had compared the outcomes of the anterior approach with that of the posterior approach for MCM in recent years, choosing a proper surgical approach is still a controversial issue . METHODS We searched electronic databases for relevant studies that compared the anterior approach with the posterior approach for MCM. Then, data extraction and quality assessment were conducted. We used RevMan 5.3 for data analysis. A random effects model was used for heterogenous data, whereas a fixed-effects model was used for homogenous data. RESULTS A total of 25 nonrandomized controlled studies involving 1843 patients were included. No statistical difference was found with regard to the preoperative Japanese Orthopedic Association (JOA) score between the anterior group and the posterior group (P=0.08, 95% CI, -0.02 to 0.40). The postoperative JOA score and the recovery rate were higher in the anterior group as compared with the posterior group (P=0.02, 95% CI, 0.10-1.33; P=0.006, 95% CI, 2.33-13.90). In the subgroup analysis, better postoperative JOA scores and recovery rates were also obtained in the anterior group for cervical spondylotic myelopathy (P=0.0007, 95% CI, 0.29-1.09; P=0.01, 95% CI, 1.30-9.93). No significant differences were found in the complication rate, the revision rate, the operation time, and blood loss between the 2 groups (P=0.17, 95% CI, 0.89-1.95; P=0.21, 95% CI, 0.72-4.61; P=0.31, 95% CI, -20.20 to 63.30; P=0.88, 95% CI, -166.86 to 143.81). CONCLUSIONS The anterior approach is associated with a better postoperative neurological outcome compared with the posterior approach in cervical spondylotic myelopathy patients. Considering the complication rate, the revision rate, the operation time, and blood loss, the anterior approach appears to be as safe as the posterior approach. Further randomized controlled trials comparing the anterior approach and the posterior approach for MCM should be performed to make a more convincing conclusion.
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Lei T, Wang H, Tong T, Ma Q, Wang L, Shen Y. Enlarged anterior cervical diskectomy and fusion in the treatment of severe localised ossification of the posterior longitudinal ligament. J Orthop Surg Res 2016; 11:129. [PMID: 27809858 PMCID: PMC5096318 DOI: 10.1186/s13018-016-0449-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Accepted: 09/21/2016] [Indexed: 11/21/2022] Open
Abstract
Background Severe localised ossification of the posterior longitudinal ligament (OPLL) should be directly removed by anterior approach, but the exposure during anterior cervical diskectomy and fusion (ACDF) is restricted and may increase the risk of a cerebrospinal fluid (CSF) leak. Corpectomy is facilitated to extirpate the ossification, but it is relatively more invasive. The purpose of this study was to investigate the feasibility and clinical outcome of enlarged ACDF in treating severe localised OPLL. Methods Twenty-four selective patients with severe localised OPLL who underwent enlarged ACDF from January 2011 to July 2013 were retrospectively investigated. The Japanese Orthopaedic Association (JOA) scales, visual analogue scale (VAS), occupying rate (OR), fused segment height (FSH), sagittal segmental alignment (SSA), range of motion (ROM), and complications were investigated. Results After a mean 34.9-month follow-up, the mean JOA score increased from 9.5 ± 1.4 preoperatively to 14.1 ± 1.5 at the final follow-up (p < 0.05), while OR decreased from 58.9 ± 6.1 % pre- to 10.6 ± 5.5 % postoperatively (p < 0.05). The average VAS was 6.1 ± 1.8 preoperatively and 2.1 ± 1.4 at the final follow-up (p < 0.05). The SSA angles at the final follow-up increased 2.2° compared to the preoperative values (p < 0.05). The mean FSH increased 2.4 mm from pre- to postoperatively, but decreased 2.7 mm from postoperatively to final follow-up. The cervical ROM was not obviously reduced at the final follow-up (p > 0.05) because only one level was fixed. There were three cases of cerebrospinal fluid leakage, one case of haematoma, and one case showed transient neurological deterioration. Conclusions Enlarged ACDF is an effective procedure for treating selective patients with severe localised OPLL. Using this technique, the retrovertebral OPLL can be removed through a one-level diskectomy and a corpectomy can be avoided. Trial registration This study has been registered with the ResearchRegistry and the unique identifying number is researchregistry1365 (K2015-022-04). It was retrospectively registered at 21 June 2016 and the first participant to the trial was at 4 January 2011. Electronic supplementary material The online version of this article (doi:10.1186/s13018-016-0449-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tao Lei
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, The Key Laboratory of Orthopedic Biomechanics of Hebei Province, 139 Ziqiang Street, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Hui Wang
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, The Key Laboratory of Orthopedic Biomechanics of Hebei Province, 139 Ziqiang Street, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Tong Tong
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, The Key Laboratory of Orthopedic Biomechanics of Hebei Province, 139 Ziqiang Street, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Qinghua Ma
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, The Key Laboratory of Orthopedic Biomechanics of Hebei Province, 139 Ziqiang Street, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Linfeng Wang
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, The Key Laboratory of Orthopedic Biomechanics of Hebei Province, 139 Ziqiang Street, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Yong Shen
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, The Key Laboratory of Orthopedic Biomechanics of Hebei Province, 139 Ziqiang Street, Shijiazhuang, 050051, Hebei, People's Republic of China.
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Long-term results of anterior cervical corpectomy and fusion with nano-hydroxyapatite/polyamide 66 strut for cervical spondylotic myelopathy. Sci Rep 2016; 6:26751. [PMID: 27225189 PMCID: PMC4880938 DOI: 10.1038/srep26751] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 05/09/2016] [Indexed: 01/07/2023] Open
Abstract
To assess the long-term clinical and radiographic outcomes of anterior cervical corpectomy and fusion (ACCF) with a neotype nano-hydroxyapatite/polyamide 66 (n-HA/PA66) strut in the treatment of cervical spondylotic myelopathy (CSM). Fifty patients with CSM who underwent 1- or 2-level ACCF with n-HA/PA66 struts were retrospectively investigated. With a mean follow-up of 79.6 months, the overall mean JOA score, VAS and cervical alignment were improved significantly. At last follow-up, the fusion rate was 98%, and the subsidence rate of the n-HA/PA66 strut was 8%. The "radiolucent gap" at the interface between the n-HA/PA66 strut and the vertebra was further noted to evaluate the osteoconductivity and osseointegration of the strut, and the incidence of it was 62% at the last follow-up. Three patients suffered symptomatic adjacent segment degeneration (ASD). No significant difference was detected in the outcomes between 1- and 2-level corpectomy at follow-ups. In conclusion, the satisfactory outcomes in this study indicated that the n-HA/PA66 strut was an effective graft for cervical reconstruction. Moreover, the osteoconductivity and osseointegration of the strut is still need to be optimized for future clinical application owing to the notably presence of "radiolucent gap" in present study.
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13
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Value of intraoperative neurophysiological monitoring to reduce neurological complications in patients undergoing anterior cervical spine procedures for cervical spondylotic myelopathy. J Clin Neurosci 2015; 25:27-35. [PMID: 26677786 DOI: 10.1016/j.jocn.2015.06.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 06/08/2015] [Indexed: 01/23/2023]
Abstract
The primary aim of this study was to conduct a systematic review of reports of patients with cervical spondylotic myelopathy and to assess the value of intraoperative monitoring (IOM), including somatosensory evoked potentials, transcranial motor evoked potentials and electromyography, in anterior cervical procedures. A search was conducted to collect a small database of relevant papers using key words describing disorders and procedures of interest. The database was then shortlisted using selection criteria and data was extracted to identify complications as a result of anterior cervical procedures for cervical spondylotic myelopathy and outcome analysis on a continuous scale. In the 22 studies that matched the screening criteria, only two involved the use of IOM. The average sample size was 173 patients. In procedures done without IOM a mean change in Japanese Orthopaedic Association score of 3.94 points and Nurick score by 1.20 points (both less severe post-operatively) was observed. Within our sub-group analysis, worsening myelopathy and/or quadriplegia was seen in 2.71% of patients for studies without IOM and 0.91% of patients for studies with IOM. Variations persist in the existing literature in the evaluation of complications associated with anterior cervical spinal procedures. Based on the review of published studies, sufficient evidence does not exist to make recommendations regarding the use of different IOM modalities to reduce neurological complications during anterior cervical procedures. However, future studies with objective measures of neurological deficits using a specific IOM modality may establish it as an effective and reliable indicator of injury during such surgeries.
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Bai CR, Wang BQ, Li KH, Guo A, Tang H. Benefit of degenerative posterior longitudinal ligament removal during anterior decompression in cervical spondylotic myelopathy. Orthopedics 2015; 38:e54-61. [PMID: 25611421 DOI: 10.3928/01477447-20150105-61] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 03/25/2014] [Indexed: 02/03/2023]
Abstract
It remains controversial whether degenerative posterior longitudinal ligaments should be removed during anterior decompression procedures for cervical spondylotic myelopathy. Few data are available from studies that have compared removing and retaining the degenerative posterior longitudinal ligament. The goal of this retrospective study was to evaluate the benefit of degenerative posterior longitudinal ligament removal during such operations. Clinical data on 130 patients with confirmed degenerative posterior longitudinal ligament who underwent anterior cervical decompression surgery were retrospectively reviewed. All procedures were performed by the same senior orthopedic surgeon at the authors' spinal surgery center. The degenerative posterior longitudinal ligament was removed in 62 patients (group A) and retained in 68 patients (group B). The 130 patients were followed for 36 months. The Japanese Orthopedic Association score improved from 9.0±2.7 to 14.7±1.5 in group A and from 9.4±2.6 to 14.1±1.7 in group B (P=.028). The recovery rate for spinal cord neurologic function was 66.7% in group A and 61.3% in group B (P=.031). Operating time was longer (P=.002) and the sagittal median diameter of the vertebral canal was enhanced in group A (P<.001). Narrowing of previously enlarged canals occurred at a significantly higher rate in group B (P=.044). No significant difference was found in the rates of common complications between groups. Removal of the degenerative posterior longitudinal ligament in anterior decompression procedures for cervical spondylotic myelopathy appeared to be beneficial and provided more complete decompression and better postoperative outcomes than surgery without removal of the ligament. Although this procedure was generally safe, it required longer operating times, was more technically challenging, and required more experienced surgeons than surgery without removal of the ligament.
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Evaluation of anterior cervical reconstruction with titanium mesh cages versus nano-hydroxyapatite/polyamide66 cages after 1- or 2-level corpectomy for multilevel cervical spondylotic myelopathy: a retrospective study of 117 patients. PLoS One 2014; 9:e96265. [PMID: 24789144 PMCID: PMC4008500 DOI: 10.1371/journal.pone.0096265] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 04/05/2014] [Indexed: 11/10/2022] Open
Abstract
Objective To retrospectively compare the efficacy of the titanium mesh cage (TMC) and the nano-hydroxyapatite/polyamide66 cage (n-HA/PA66 cage) for 1- or 2-level anterior cervical corpectomy and fusion (ACCF) to treat multilevel cervical spondylotic myelopathy (MCSM). Methods A total of 117 consecutive patients with MCSM who underwent 1- or 2-level ACCF using a TMC or an n-HA/PA66 cage were studied retrospectively at a mean follow-up of 45.28±12.83 months. The patients were divided into four groups according to the level of corpectomy (1- or 2-level corpectomy) and cage type used (TMC or n-HA/PA66 cage). Clinical and radiological parameters were used to evaluate outcomes. Results At the one-year follow-up, the fusion rate in the n-HA/PA66 group was higher, albeit non-significantly, than that in the TMC group for both 1- and 2-level ACCF, but the fusion rates of the procedures were almost equal at the final follow-up. The incidence of cage subsidence at the final follow-up was significantly higher in the TMC group than in the n-HA/PA66 group for the 1-level ACCF (24% vs. 4%, p = 0.01), and the difference was greater for the 2-level ACCF between the TMC group and the n-HA/PA66 group (38% vs. 5%, p = 0.01). Meanwhile, a much greater loss of fused height was observed in the TMC group compared with the n-HA/PA66 group for both the 1- and 2-level ACCF. All four groups demonstrated increases in C2-C7 Cobb angle and JOA scores and decreases in VAS at the final follow-up compared with preoperative values. Conclusion The lower incidence of cage subsidence, better maintenance of the height of the fused segment and similar excellent bony fusion indicate that the n-HA/PA66 cage may be a superior alternative to the TMC for cervical reconstruction after cervical corpectomy, in particular for 2-level ACCF.
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Grauvogel J, Scheiwe C, Kaminsky J. Use of Piezosurgery for removal of retrovertebral body osteophytes in anterior cervical discectomy. Spine J 2014; 14:628-36. [PMID: 24314765 DOI: 10.1016/j.spinee.2013.06.085] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 03/30/2013] [Accepted: 06/24/2013] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT The relatively new technique of Piezosurgery is based on microvibrations, generated by the piezoelectrical effect, which results in selective bone cutting with preservation of adjacent soft tissue. PURPOSE To study the applicability of Piezosurgery in anterior cervical discectomy with fusion (ACDF) surgery. STUDY DESIGN/SETTING Prospective clinical study at the neurosurgical department of the University of Freiburg, Germany. PATIENT SAMPLE Nine patients with cervical disc herniation and retrovertebral osteophytes who underwent ACDF surgery. OUTCOME MEASURES Piezosurgery was evaluated with respect to practicability, safety, preciseness of bone cutting, and preservation of adjacent neurovascular tissue. Pre- and postoperative clinical and radiological data were assessed. METHODS Piezosurgery was supportively used in ACDF in nine patients with either radiculopathy or myelopathy from disc herniation or ventral osteophytes. After discectomy, osteophytes were removed with Piezosurgery to decompress the spinal canal and the foramina. Angled inserts were used, allowing for cutting even retrovertebral osteophytes. RESULTS In all nine cases, Piezosurgery cut bone selectively with no damage to nerve roots, dura, or posterior longitudinal ligament. None of the patients experienced any new neurological deficit after the operation. The handling of the instrument was safe and the cut precise. Osteophytic spurs, even retrovertebral ones that generally only can be approached via corpectomies, could be safely removed because of the angled inserts through the disc space. Currently, a slightly prolonged operation time was observed for Piezosurgery. Furthermore, the design of the handpiece could be further improved to facilitate the intraoperative handling in ACDF. CONCLUSIONS Piezosurgery proved to be a useful and safe technique for selective bone cutting and removal of osteophytes with preservation of neuronal and soft tissue in ACDF. In particular, the angled inserts were effective in cutting bone spurs behind the adjacent vertebra which cannot be reached with conventional rotating burs.
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Affiliation(s)
- Juergen Grauvogel
- Department of Neurosurgery, Albert-Ludwigs-University, Breisacherstr. 64, 79106 Freiburg, Germany.
| | - Christian Scheiwe
- Department of Neurosurgery, Albert-Ludwigs-University, Breisacherstr. 64, 79106 Freiburg, Germany
| | - Jan Kaminsky
- Department of Neurosurgery, Sankt Gertrauden Hospital, Paretzer Straße 12, 10713 Berlin, Germany
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Fengbin Y, Jinhao M, Xinyuan L, Xinwei W, Yu C, Deyu C. Evaluation of a new type of titanium mesh cage versus the traditional titanium mesh cage for single-level, anterior cervical corpectomy and fusion. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2013; 22:2891-6. [PMID: 24000074 DOI: 10.1007/s00586-013-2976-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2013] [Revised: 06/14/2013] [Accepted: 08/19/2013] [Indexed: 11/29/2022]
Abstract
STUDY DESIGN A retrospective review of prospectively collected data in an academic institution. OBJECTIVE To evaluate the safety and efficacy of a new type of titanium mesh cage (TMC) in single-level, anterior cervical corpectomy and fusion (ACCF). METHODS Fifty-eight patients consecutive with cervical spondylotic myelopathy (CSM) from cervical degenerative spondylosis and isolated ossification of the posterior longitudinal ligament were treated with a single-level ACCF using either a new type of TMC (28 patients, group A) or the traditional TMC (30 patients, group B). We evaluated the patients for TMC subsidence, cervical lordosis (C2-C7 Cobb and Cobb of fused segments) and fusion status for a minimum of 30 months postoperatively based on spine radiographs. In addition, neurologic outcomes were evaluated using the Japanese Orthopedic Association (JOA) scores. Neck pain was evaluated using a 10-point visual analog scale (VAS). RESULTS The loss of height of the fused segments was less for group A than for group B (0.8 ± 0.3 vs. 2.8 ± 0.4 mm) (p < 0.01); also, there was a lower rate of severe subsidence (≥3 mm) in group A (4 %, 1/28) than in group B (17 %, 5/30) (p < 0.01). There were no differences in the C2-C7 Cobb and Cobb of fused segments between the groups preoperatively or at final follow-up (p > 0.05), but the Cobb of fused segments immediately postoperative were significantly less for group B than for group A (p < 0.01). All patients, however, had successful fusion (100 %, each). Both groups had marked improvement in the JOA score after operation (p < 0.01), with no significant differences in the JOA recovery ratio (p > 0.05). The postoperative VAS neck pain scores for group A were significantly less than that for group B (p < 0.05); severe subsidence was correlated with neck pain. CONCLUSIONS The new type of TMC provides comparable clinical results and fusion rates with the traditional TMC for patients undergoing single-level corpectomy. The new design TMC decreases postoperative subsidence (compared to the traditional TMC); the unique design of the new type of TMC matches the vertebral endplate morphology which appears to decrease the severity of subsidence-related neck pain in follow-up.
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Affiliation(s)
- Yu Fengbin
- Department of Orthopaedic Surgery, No. 98 Hospital of PLA, No. 9 Chezhan Road, 313000, Huzhou, China,
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Comparison of 3 reconstructive techniques in the surgical management of multilevel cervical spondylotic myelopathy. Spine (Phila Pa 1976) 2012; 37:E1450-8. [PMID: 22869063 DOI: 10.1097/brs.0b013e31826c72b4] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN A retrospective comparative study was performed in patients with 3-level cervical spondylotic myelopathy (CSM). OBJECTIVE To compare the clinical outcomes, radiological parameters, and complication incidence of 3 reconstructive techniques after the anterior decompression of multilevel CSM. SUMMARY OF BACKGROUND DATA There has been growing interest in combination of anterior cervical discectomy and fusion (ACDF) and anterior cervical corpectomy and fusion (ACCF) for the treatment of multilevel CSM in recent years. However, the clinical efficacy and radiological outcomes of the hybrid decompression and fusion (HDF) have rarely been investigated. METHODS A total of 180 consecutive patients with 3-level CSM undergoing the anterior decompression and fusion procedures from January 2003 to July 2010 were retrospectively investigated. According to various reconstructive techniques, the patients were divided into 3 groups: HDF, ACDF, and ACCF groups. The clinical effects and improvements of cervical and segmental lordosis in each group were assessed. In addition, the fusion rate, postoperative complications, and radiographical adjacent-level changes regarding each group were also evaluated. RESULTS No statistical differences in clinical effects, restoration of cervical lordosis, and incidences of postoperative complications were found between the HDF and ACDF groups (P > 0.05). The ACCF group has achieved clinical effects similar to the ACDF or HDF group (P > 0.05), but it had more bleeding, lower fusion rate, and higher incidences of postoperative complications compared with the ACDF or HDF group (P < 0.05). The improvements of the cervical and segmental lordosis in the ACCF group were significantly less than the ACDF or HDF group (P < 0.05). There was no significant difference in radiographical adjacent-level changes among the 3 groups (P > 0.05). CONCLUSION The HDF can be considered an effective and safe alternative procedure compared with ACDF in the treatment of the multilevel CSM, and ACCF should be the last option.
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Qizhi S, Xuelei W, Lili Y, Lei L, Linwei C, Yang L, Ying Z, Wen Y. Segmental anterior decompression and fusion for multilevel ossification of the posterior longitudinal ligament. Orthopedics 2012; 35:e403-8. [PMID: 22385453 DOI: 10.3928/01477447-20120222-38] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The purpose of this study was to evaluate the outcome of segmental anterior decompression and fusion for multilevel ossification of the posterior longitudinal ligament. Data were collected from 23 patients with multilevel ossification of the posterior longitudinal ligament. Average operative time and blood loss were 121 minutes and 201.6 mL, respectively. The Nurick score significantly decreased from 2.7±0.9 preoperatively to 1.8±0.9 at last follow-up (P<.01). The preoperative Japanese Orthopaedic Association score was 8.2, which significantly increased to 13.8 points at last follow-up (P<.01), with an improvement rate of 64.5%. The operation also significantly increased cervical lordosis (P<.01) from 7.7° preoperatively to 13.3° postoperatively. The fusion rate was 95.7% at 6 months postoperatively, and 100% at 12 months postoperatively. The loss of cervical lordosis and height of fusion segments were 1.2° and 0.9 mm at last follow-up, respectively. No hardware complications occurred. Cerebrospinal fluid leakage occurred in 2 patients, and hematoma occurred in 1 patient who needed an emergency operation. Segmental anterior decompression and fusion was generally effective and safe in the treatment of multilevel ossification of the posterior longitudinal ligament if indications were well controlled.
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Affiliation(s)
- Sun Qizhi
- Department of Orthopedics, No. 88 Hospital of China People’s Liberation Army, Shandong, China
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20
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Lin Q, Zhou X, Wang X, Cao P, Tsai N, Yuan W. A comparison of anterior cervical discectomy and corpectomy in patients with multilevel cervical spondylotic myelopathy. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2011; 21:474-81. [PMID: 21826497 DOI: 10.1007/s00586-011-1961-9] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 07/07/2011] [Accepted: 07/24/2011] [Indexed: 10/17/2022]
Abstract
BACKGROUND The optimal surgical approach for multilevel cervical spondylotic myelopathy (CSM) has not been defined, and the relative merits of multilevel anterior cervical discectomy and fusion (ACDF) and anterior cervical corpectomy (2-level or skip 1-level corpectomy) and fusion (ACCF) remain controversial. However, few comparative studies have been conducted on these two surgical approaches. METHODS This study retrospectively reviewed the case histories of 120 patients that underwent surgical treatment for 3- or 4-level CSM from July 2003 to June 2008. One hundred and twenty patients (81 male and 39 female) of mean age 58.3±9.8 years (37-78) were included. The study compared perioperative parameters (blood loss, operation times), complications [surgery-related complications (CSF, hoarseness, epidural hematoma, C5-palsy, dysphagia), instrumentation and graft related complications (dislodgement, subsidence)], clinical parameters [Japanese Orthopedic Association (JOA) scores, Neck Dysfunciton Index (NDI) scores], and radiologic parameters (segmental lordosis, fusion rate). RESULTS At a minimum of 2-year follow-up, both ACDF and ACCF groups demonstrated a significant increase in the JOA scores (preoperatively 9.25±1.9 and 8.86±1.9, postoperatively 13.86±1.6 and 13.27±1.8, respectively), segmental lordosis (preoperatively 9.79±3.4 and 9.54±3.0, postoperatively 17.75±2.6 and 14.49±2.5, respectively) and NDI scores (preoperatively 12.56±3.0 and 12.21±3.4, postoperatively 3.44±1.7 and 5.68±2.6, respectively). Six patients (2 dislodgement, 4 subsidence) in ACCF group had instrumentation and graft related-complications and they had no obvious neurological symptoms without a second operation. Blood loss (102.81±51.3 and 149.05±74, respectively, P=0.000), NDI scores (P=0.000), and instrumentation and graft related-complications (P=0.032) were significantly lower in the ACDF group, whereas operation time (138.07±30.9 and 125.08±26.4, respectively, P=0.021) and segmental lordosis (P=0.000) were significantly greater in the ACDF group. Other parameters were not significantly different in the two groups. CONCLUSIONS Surgical managements of 3- or 4-level CSM by ACDF or ACCF showed no significant differences in terms of achieved clinical symptom improvements, with the exception of better postoperative NDI scores in ACDF. In addition, ACDF is better than ACCF in terms of blood loss, lordotic curvature improvement and instrumentation and graft related-complication rates, with the exception of operation times.
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Affiliation(s)
- Qiushui Lin
- Department of Orthopedics, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai, 200003, China
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Surgical results and complications in a series of 71 consecutive cervical spondylotic corpectomies. Acta Neurochir (Wien) 2010; 152:1155-63. [PMID: 20443029 DOI: 10.1007/s00701-010-0660-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Accepted: 04/12/2010] [Indexed: 10/19/2022]
Abstract
BACKGROUND Cervical corpectomy is a common procedure in spondylosis. It is normally a well-tolerated surgery and clinical improvement is widely described. However, it is associated with potential risky complications (subsidence, clinical deterioration, vertebral artery injury...); thus, a judicious surgical indication and a good technique are required. METHODS We revised retrospectively the clinical evolution and complications of 71 spondylotic corpectomies in a series of 100 consecutive patients operated on due to different ethiological causes from January 2001 to September 2007 at our hospital. RESULTS Among the 71 cases, a single-level corpectomy was performed in 46 cases and a two level in 25. The graft we used was a titanium mesh filled with bone from the removed vertebra in 69 cases and a telescopic cage in two additional cases. We stabilized the construction with a locking plate. The presurgical clinical status of patients, according to the Nurick grading scale was as follows: 30 patients were grade 0, 12 were grade 1, eight were grade 2, 14 were grade 3, five were grade 4 and two were grade 5. After decompression, 41 patients were considered cured, three were grade 1, seven were grade 2, 11 were grade 3, seven were grade 4 and one was grade 5. One patient died in the postoperative period. Globally, 44 (62%) patients achieved good or excellent results (grades 0-1), 15 (21%) remained as previously (grade >1), six (8%) improved partially and five (7%) worsened. Forty (95%) grades 0 and 1 patients became cured, and four (50%), four (31%) and two (28%) grades 2, 3 and 4-5, respectively, experienced a postsurgical improvement. Significant complications occurred in 18 (25%) patients. The most significant were: hardware failure (n = 7), subsidence in five cases (one required intervention) and incorrect screw placement in two (one required intervention); permanent dysphagia (n = 4) and dysphonia (n = 1); postsurgical neurological worsening in three cases (two improved and one remained grade 4); vertebral artery injury in one case; and an urgent evacuation of a prevertebral hematoma. One patient died due to respiratory disturbances. CONCLUSIONS Cervical corpectomy is efficient for spinal cord decompression, especially when anterior components (disk osteophyte, OPLL...) bulge in the spinal cord. A three or more level corpectomy was not considered in this series since they may be associated to high rate morbidity. We found that this decompression led to better clinical results in patient grades 0 and 1 and to poorer results as myelopathy progressed. Among complications, subsidence was the most frequent specific one, but since it was rarely associated with symptoms, the majority of patients were successfully treated conservatively.
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Lian XF, Xu JG, Zeng BF, Zhou W, Kong WQ, Hou TS. Noncontiguous anterior decompression and fusion for multilevel cervical spondylotic myelopathy: a prospective randomized control clinical study. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2010; 19:713-9. [PMID: 20174838 DOI: 10.1007/s00586-010-1319-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2009] [Revised: 11/02/2009] [Accepted: 01/31/2010] [Indexed: 11/29/2022]
Abstract
Anterior decompression and fusion is an established procedure in surgical treatment for multilevel cervical spondylotic myelopathy (MCSM). However, contiguous corpectomies and fusion (CCF) often induce postoperative complications such as nonunion, graft subsidence, and loss of lordotic alignment. As an alternative, noncontiguous corpectomies or one-level corpectomy plus adjacent-level discectomy with retention of an intervening body has been developed recently. In this study, we prospectively compared noncontiguous anterior decompression and fusion (NADF) and CCF for MCSM in terms of surgical invasiveness, clinical and radiographic outcomes, and complications. From January 2005 to June 2007, 105 patients with MCSM were randomized to NADF group (n = 55) and CCF group (n = 50), and followed up for average 31.5 months (range 24-48 months). Average operative time and blood loss decreased significantly in the NADF group as compared with those in the CCF group (p < 0.05 and <0.001, respectively). For VAS, within 3 months postoperatively, there was no significant difference between the two groups. But at 6 months after surgery and final follow-up, VAS improved significantly in NADF group than that in CCF group (p < 0.05). No significant difference of JOA score was observed between the two groups at every collection time. In NADF group, all 55 cases obtained fusion at 1 year after operation (average 5.1 months). In CCF group, 48 cases achieved fusion 1 year postoperatively, but the other 2 cases were performed posterior stabilization and achieved fusion 6 months later. The differences of cervical lordosis between two groups were insignificant at the same follow-up time. But the loss of lordosis and height of fusion segments in 6 months postoperatively and final follow-up were significantly more in CFF group than in NADF group (p < 0.001). Complications were similar in both groups. But in CCF group three cases needed reoperation, one case with extradural hematoma was immediately re-operated after anterior decompression and two cases mentioned above were performed posterior stabilization at 1 year postoperatively. In conclusion, in the patients with MCSM, without developmental stenosis and continuous or combined ossification of posterior longitudinal ligaments, NADF and CCF showed an identical effect of decompression. In terms of surgical time, blood loss, VAS, fusion rate and cervical alignment, NADF was superior compared with CCF.
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Affiliation(s)
- Xiao-Feng Lian
- Department of Orthopedics, Sixth People's Hospital, Shanghai Jiaotong University, Shanghai, China.
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Uribe JS, Sangala JR, Duckworth EAM, Vale FL. Comparison between anterior cervical discectomy fusion and cervical corpectomy fusion using titanium cages for reconstruction: analysis of outcome and long-term follow-up. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2009; 18:654-62. [PMID: 19214597 DOI: 10.1007/s00586-009-0897-9] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Accepted: 01/19/2009] [Indexed: 12/01/2022]
Abstract
Retrospective comparative study of 80 consecutive patients treated with either anterior cervical discectomy fusion (ACDF) or anterior cervical corpectomy fusion (ACCF) for multi-level cervical spondylosis. To compare clinical outcome, fusion rates, and complications of anterior cervical reconstruction of multi-level ACDF and single-/multi-level ACCF performed using titanium mesh cages (TMCs) filled with autograft and anterior cervical plates (ACPs). Reconstruction of the cervical spine after discectomy or corpectomy with titanium cages filled with autograft has become an acceptable alternative to both allograft and autograft; however, there is no data comparing the outcome of multi-level ACDF and single-/multi-level ACCF using this reconstruction. We evaluated 80 consecutive patients who underwent surgery for the treatment of multi-level cervical spondylosis at our institution from 1998 to 2001. In this series, 42 patients underwent multi-level ACDF (Group 1) and 38 patients underwent ACCF (Group 2). Interbody TMCs and local autograft bone with ACPs were used in both procedures. Medical records were reviewed to assess outcome. Clinical outcome was measured by Odom's criteria. Operative time and blood loss were noted. Radiographs were obtained at 6 and 12 weeks, 6 months, 1 year, and 2 years (if necessary). Early hardware failures and pseudarthroses were noted. Cervical sagittal curvature was measured by Ishihara's index at 1 year. Group 1 had a mean age 46.2 years (range 35-60 years). Group 2 had a mean age 50.1 years (range 35-70 years).The operative time was significantly lower (P < 0.001) and blood loss significantly higher (P < 0.001) in Group 2 than in Group 1. At a minimum of 1 year follow up, patients in both groups had equivalent improvement in their clinical symptoms. The fusion rates for Group 1 were 97.6 and 92.1% for Group 2. The rates of early hardware failure were higher in Group 2 (2.6%) than in Group 1 (0%). The fusion rates for Group 1 were not significantly higher than Group 2 (P > 0.28). There was one patient in Group 1 and 2 patients in Group 2 with pseudarthroses. Complication rates in Group 2 were not significantly higher (P > 0.341). Cervical lordosis was well-maintained (80%) in both groups. Both multi-level ACDF and ACCF with anterior cervical reconstruction using TMC filled with autograft and ACP for treatment of multi-level cervical spondylosis have high fusion rates and good clinical outcome. However, there is a higher rate of early hardware failure and pseudarthroses after ACCF than ACDF. Hence, in the absence of specific pathology requiring removal of vertebral body, multi-level ACDF using interbody cages and autologous bone graft could result in lower morbidity.
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Affiliation(s)
- Juan S Uribe
- Department of Neurosurgery, University of South Florida, 2 Tampa General Circle, USF Health South Center, Tampa, FL 33606, USA
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Lee SH, Sung JK. Anterior cervical stabilization using a semi-constrained cervical plate and titanium mesh cage for single level corpectomy. J Clin Neurosci 2008; 15:1227-34. [DOI: 10.1016/j.jocn.2007.09.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2007] [Revised: 09/14/2007] [Accepted: 09/20/2007] [Indexed: 10/21/2022]
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