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Boden LM, Heller JG, Fischgrund JS. Association of Poor Bone Quality with Pseudarthrosis and Poor Clinical Outcomes in Single-Level Instrumented Lumbar Arthrodesis Using Local Autologous Bone Graft. J Am Acad Orthop Surg 2024; 32:841-848. [PMID: 38723252 DOI: 10.5435/jaaos-d-23-01124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Indexed: 09/07/2024] Open
Abstract
INTRODUCTION Although osteoporosis and low bone mineral density is thought to lead to poor fusion outcomes, few studies have adequately addressed the correlation, and they were limited by small sample size at a single institution. METHODS We completed a secondary analysis of 182 patients enrolled at 26 spine centers across the United States in the EXO-SPINE FDA-approved clinical trial with 12-month CT-based fusion status determined by two independent, blinded radiologists. Using previously described CT-based techniques, we measured local and global Hounsfield units (HU) and examined the relationship with radiographic and clinical outcomes. RESULTS CT scans were available for review from 95 patients, with a mean age of 56.2 years and mean global density of 153.0 HU. No relationship was observed between HU and radiographic fusion status or clinical outcomes. Although 12% of patients had lumbar vertebral body HU measurements consistent with osteoporosis, this classification had no relation with fusion or clinical outcomes. Patients with pseudarthrosis had higher Oswestry Disability Index (22.2 vs. 16.6, P = 0.037) and back pain visual analog scale (7.0 vs. 4.9, P = 0.014) scores than patients with at least unilateral fusion at the 12-month follow-up. DISCUSSION In this large, multicenter study, lower vertebral body HU was not associated with worse fusion status after single-level instrumented posterolateral lumbar fusion using only local autologous bone graft. However, there was an association between radiographic fusion status and clinical outcomes, validating the importance of determining predictors of successful fusion. Assessment of fusion status with CT scans yielded a much lower fusion success rate with local bone graft than previously reported and may warrant additional investigation.
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Affiliation(s)
- Lauren M Boden
- From the Department of Orthopedic Surgery, Cleveland Clinic Center for Spine Health, Cleveland, OH (Boden), the Department of Orthopedic Surgery, Emory University, Atlanta, GA (Dr. Heller), Department of Orthopedic Surgery, Beaumont Health System, Royal Oak, MI (Dr. Fischgrund)
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Cheers GM, Weimer LP, Neuerburg C, Arnholdt J, Gilbert F, Thorwächter C, Holzapfel BM, Mayer-Wagner S, Laubach M. Advances in implants and bone graft types for lumbar spinal fusion surgery. Biomater Sci 2024. [PMID: 39190323 DOI: 10.1039/d4bm00848k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
The increasing prevalence of spinal disorders worldwide necessitates advanced treatments, particularly interbody fusion for severe cases that are unresponsive to non-surgical interventions. This procedure, especially 360° lumbar interbody fusion, employs an interbody cage, pedicle screw-and-rod instrumentation, and autologous bone graft (ABG) to enhance spinal stability and promote fusion. Despite significant advancements, a persistent 10% incidence of non-union continues to result in compromised patient outcomes and escalated healthcare costs. Innovations in lumbar stabilisation seek to mimic the properties of natural bone, with evolving implant materials like titanium (Ti) and polyetheretherketone (PEEK) and their composites offering new prospects. Additionally, biomimetic cages featuring precisely engineered porosities and interconnectivity have gained traction, as they enhance osteogenic differentiation, support osteogenesis, and alleviate stress-shielding. However, the limitations of ABG, such as harvesting morbidities and limited fusion capacity, have spurred the exploration of sophisticated solutions involving advanced bone graft substitutes. Currently, demineralised bone matrix and ceramics are in clinical use, forming the basis for future investigations into novel bone graft substitutes. Bioglass, a promising newcomer, is under investigation despite its observed rapid absorption and the potential for foreign body reactions in preclinical studies. Its clinical applicability remains under scrutiny, with ongoing research addressing challenges related to burst release and appropriate dosing. Conversely, the well-documented favourable osteogenic potential of growth factors remains encouraging, with current efforts focused on modulating their release dynamics to minimise complications. In this evidence-based narrative review, we provide a comprehensive overview of the evolving landscape of non-degradable spinal implants and bone graft substitutes, emphasising their applications in lumbar spinal fusion surgery. We highlight the necessity for continued research to improve clinical outcomes and enhance patient well-being.
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Affiliation(s)
- Giles Michael Cheers
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany.
| | - Lucas Philipp Weimer
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany.
| | - Carl Neuerburg
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany.
| | - Jörg Arnholdt
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany.
| | - Fabian Gilbert
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany.
| | - Christoph Thorwächter
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany.
| | - Boris Michael Holzapfel
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany.
| | - Susanne Mayer-Wagner
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany.
| | - Markus Laubach
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany.
- Australian Research Council (ARC) Training Centre for Multiscale 3D Imaging, Modelling and Manufacturing (M3D Innovation), Queensland University of Technology, Brisbane, QLD 4000, Australia
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Zhong J, Tareen J, Ashayeri K, Leon C, Balouch E, O'Malley N, Stickley C, Maglaras C, O'Connell B, Ayres E, Fischer C, Kim Y, Protopsaltis T, Buckland AJ. Does Bone Morphogenetic Protein Use Reduce Pseudarthrosis Rates in Single-Level Transforaminal Lumbar Interbody Fusion Surgeries? Int J Spine Surg 2024; 18:207-216. [PMID: 38569928 PMCID: PMC11287818 DOI: 10.14444/8590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024] Open
Abstract
BACKGROUND Recombinant human bone morphogenetic protein 2 (rhBMP-2, or BMP for short) is a popular biological product used in spine surgeries to promote fusion and avoid the morbidity associated with iliac crest autograft. BMP's effect on pseudarthrosis in transforaminal lumbar interbody fusion (TLIF) remains unknown. OBJECTIVE To assess the rates of pseudarthrosis in single-level TLIF with and without concurrent use of BMP. METHODS This was a retrospective cohort study conducted at a single academic institution. Adults undergoing primary single-level TLIF with a minimum of 1 year of clinical and radiographic follow-up were included. BMP use was determined by operative notes at index surgery. Non-BMP cases with iliac crest bone graft were excluded. Pseudarthrosis was determined using radiographic and clinical evaluation. Bivariate differences between groups were assessed by independent t test and χ 2 analyses, and perioperative characteristics were analyzed by multiple logistic regression. RESULTS One hundred forty-eight single-level TLIF patients were included. The mean age was 59.3 years, and 52.0% were women. There were no demographic differences between patients who received BMP and those who did not. Pseudarthrosis rates in patients treated with BMP were 6.2% vs 7.5% in the no BMP group (P = 0.756). There was no difference in reoperation for pseudarthrosis between patients who received BMP (3.7%) vs those who did not receive BMP (7.5%, P = 0.314). Patients who underwent revision surgery for pseudarthrosis more commonly had diabetes with end-organ damage (revised 37.5% vs not revised 1.4%, P < 0.001). Multiple logistic regression analysis demonstrated no reduction in reoperation for pseudarthrosis related to BMP use (OR 0.2, 95% CI 0.1-3.7, P = 0.269). Diabetes with end-organ damage (OR 112.6,95% CI 5.7-2225.8, P = 0.002) increased the risk of reoperation for pseudarthrosis. CONCLUSIONS BMP use did not reduce the rate of pseudarthrosis or the number of reoperations for pseudarthrosis in single-level TLIFs. Diabetes with end-organ damage was a significant risk factor for pseudarthrosis. CLINICAL RELEVANCE BMP is frequently used "off-label" in transforaminal lumbar interbody fusion; however, little data exists to demonstrate its safety and efficacy in this procedure. LEVEL OF EVIDENCE: 3
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Affiliation(s)
- Jack Zhong
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | - Jarid Tareen
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | - Kimberly Ashayeri
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | - Carlos Leon
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | - Eaman Balouch
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | - Nicholas O'Malley
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | - Carolyn Stickley
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | | | - Brooke O'Connell
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | - Ethan Ayres
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | - Charla Fischer
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | - Yong Kim
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
| | | | - Aaron J Buckland
- Department of Orthopedics, Division of Spine, NYU Langone Health, New York, NY, USA
- Melbourne Orthopedic Group, Melbourne, Australia
- Spine and Scoliosis Research Associates Australia, Windsor, Australia
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Lambrechts MJ, Issa TZ, Mazmudar A, Lee Y, Toci GR, D’Antonio ND, Schilken M, Lingenfelter K, Kepler CK, Schroeder GD, Vaccaro AR. Cellular Bone Matrix in Spine Surgery - Are They Worth the Risk: A Systematic Review. Global Spine J 2024; 14:1070-1081. [PMID: 37773001 PMCID: PMC11192114 DOI: 10.1177/21925682231205099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/30/2023] Open
Abstract
STUDY DESIGN Systematic Review. OBJECTIVE To review the literature for complications and outcomes after the implantation of cellular bone matrix (CBM) during spine fusion. METHODS The PubMed database was queried from inception to January 31, 2023 for any articles that discussed the role of and identified a specific CBM in spinal fusion procedures. Adverse events, reoperations, methods, and fusion rates were collected from all studies and reported. RESULTS Six hundred articles were identified, of which 19 were included that reported outcomes of 7 different CBM products. Seven studies evaluated lumbar fusion, 11 evaluated cervical fusion, and 1 study reported adverse events of a single CBM product. Only 4 studies were comparative studies while others were limited to case series. Fusion rates ranged from 68% to 98.7% in the lumbar spine and 87% to 100% in the cervical spine, although criteria for radiographic fusion was variable. While 7 studies reported no adverse events, there was no strict consensus on what constituted a complication. One study reported catastrophic disseminated tuberculosis from donor contaminated CBM. The authors of 14 studies had conflicts of interest with either the manufacturer or distributor for their analyzed CBM. CONCLUSIONS Current evidence regarding the use of cellular bone matrix as an osteobiologic during spine surgery is weak and limited to low-grade non-comparative studies subject to industry funding. While reported fusion rates are high, the risk of severe complications should not be overlooked. Further large clinical trials are required to elucidate whether the CBMs offer any benefits that outweigh the risks.
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Affiliation(s)
- Mark J. Lambrechts
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA
| | - Tariq Z. Issa
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA
| | - Aditya Mazmudar
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA
| | - Yunsoo Lee
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA
| | - Gregory R. Toci
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA
| | | | - Meghan Schilken
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA
| | | | | | - Gregory D. Schroeder
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA
| | - Alexander R. Vaccaro
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA
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Wu J, Miao J, Chen G, Xu H, Wen W, Xu H, Liu L. Finite element biomechanical analysis of 3D printed intervertebral fusion cage in osteoporotic population. BMC Musculoskelet Disord 2024; 25:129. [PMID: 38347518 PMCID: PMC10860281 DOI: 10.1186/s12891-024-07221-7] [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: 08/10/2023] [Accepted: 01/21/2024] [Indexed: 02/15/2024] Open
Abstract
OBJECTIVE To study the biomechanical characteristics of each tissue structure when using different 3D printing Cage in osteoporotic patients undergoing interbody fusion. METHODS A finite element model of the lumbar spine was reconstructed and validated with regarding a range of motion and intervertebral disc pressure from previous in vitro studies. Cage and pedicle screws were implanted and part of the lamina, spinous process, and facet joints were removed in the L4/5 segment of the validated mode to simulate interbody fusion. A 280 N follower load and 7.5 N·m moment were applied to different postoperative models and intact osteoporotic model to simulate lumbar motion. The biomechanical characteristics of different models were evaluated by calculating and analyzing the range of motion of the fixed and cephalic adjacent segment, the stress of the screw-rod system, the stress at the interface between cage and L5 endplate, and intervertebral disc pressure of the adjacent segment. RESULTS After rigid fixation, the range of motion of the fixed segment of model A-C decreased significantly, which was much smaller than that of the osteoporotic model. And with the increase of the axial area of the interbody fusion cages, the fixed segment of model A-C tended to be more stable. The range of motion and intradiscal pressure of the spinal models with different interbody fusion cages were higher than those of the complete osteoporosis model, but there was no significant difference between the postoperative models. On the other hand, the L5 upper endplate stress and screw-rod system stress of model A-C show a decreasing trend in different directions of motion. The stress of the endplate is the highest during flexion, which can reach 40.5 MPa (model A). The difference in endplate stress between models A-C was the largest during lateral bending. The endplate stress of models A and B was 150.5% and 140.9% of that of model C, respectively. The stress of the screw-rod system was the highest during lateral bending (model A, 102.0 MPa), which was 108.4%, 102.4%, 110.4%, 114.2% of model B and 158.5%, 110.1%, 115.8%, 125.4% of model C in flexion, extension, lateral bending, and rotation, respectively. CONCLUSIONS For people with osteoporosis, no matter what type of cage is used, good immediate stability can be achieved after surgery. Larger cage sizes provide better fixation without significantly increasing ROM and IDP in adjacent segments, which may contribute to the development of ASD. In addition, larger cage sizes can disperse endplate stress and reduce stress concentration, which is of positive significance in preventing cage subsidence after operation. The cage and screw rod system establish a stress conduction pathway on the spine, and a larger cage greatly enhances the stress-bearing capacity of the front column, which can better distribute the stress of the posterior spine structure and the stress borne by the posterior screw rod system, reduce the stress concentration phenomenon of the nail rod system, and avoid exceeding the yield strength of the material, resulting in the risk of future instrument failure.
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Affiliation(s)
- Jincheng Wu
- Department of Emergency Trauma Surgery, The Second Affiliated Hospital of Hainan Medical University, Haikou City, Hainan, China, 48 Baishuitang Road, Longhua District, 571700
| | - Jun Miao
- Tianjin Hospital, Tianjin University, Tianjin, China
| | | | - Hanpeng Xu
- Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Wangqiang Wen
- The First Affiliated Hospital of Hainan Medical University, Haikou City, Hainan, China
| | - Haoxiang Xu
- The Second People's Hospital of Hefei, Hefei, Anhui, China
| | - Lizhu Liu
- Department of Emergency Trauma Surgery, The Second Affiliated Hospital of Hainan Medical University, Haikou City, Hainan, China, 48 Baishuitang Road, Longhua District, 571700.
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Li J, Qin X, Wang J, Yang W, Bai J, Lv J. Comparison of clinical efficacy and surgical safety among three bone graft modalities in spinal tuberculosis: a network meta-analysis. J Orthop Surg Res 2023; 18:368. [PMID: 37202780 DOI: 10.1186/s13018-023-03848-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 05/09/2023] [Indexed: 05/20/2023] Open
Abstract
BACKGROUND Autogenous granular bone graft (AG), autogenous massive bone graft (AM), and titanium mesh bone graft (TM) are the three commonly utilized bone implant methods for spinal tuberculosis. However, the gold standard is still controversial. Therefore, this study aimed to compare the clinical efficacy and surgical safety of three primary bone graft modalities. METHODS For systematic literature review, several databases, including PubMed, Embase, and Web of Science, were searched up to December 2022. Stata (version 14.0) was employed for data analysis. RESULTS Our network meta-analysis included 517 patients from 7 articles whose qualities are acceptable based on our quality assessment criteria. In direct comparison, AG was associated with a shorter operation time (MD = 73.51; CI 30.65-116.37) and a lesser blood loss (MD = 214.30; CI 7.17-421.44) than AM. TM had fewer loss of Cobb angle than AG (MD = 1.45; CI 0.13-2.76) and AM (MD = 1.21; CI 0.42-1.99). Compared with AG, TM (MD = 0.96; CI 0.06-1.87) was related to a shorter bone graft fusion time. In indirect comparison, for the clinical parameters, the rank of CRP (from best to worst) was as follows: TM (58%) > AM (27%) > AG (15%), the rank of ESR (from best to worst) was as follows: AG (61%) > AM (21%) > TM (18%), and the rank of VAS (from best to worst) was as follows: AG (65%) > TM (33%) > AM (2%). In the aspect of surgical data, what is noteworthy is that AG showed less blood loss [AG (93%) > TM (6%) > AM (1%)], operative time [AG (97%) > TM (3%) > AM (0)], and complications [AG (75%) > TM (21%) > AM (4%)] than AM and TM. As for imaging parameters, the rank of the loss of Cobb angle (from best to worst) was as follows: TM (99%) > AM (1%) > AG (0). Moreover, TM showed a shorter bone graft fusion time than AM and AG: TM (96%) > AM (3%) > AG (1%). CONCLUSIONS The results indicated that AG might be the optional treatment for spinal tuberculosis owing to the outcomes of surgical safety. Moreover, TM is another right choice which can significantly reduce the loss of Cobb angle and shorten bone graft fusion time with long-term follow-up.
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Affiliation(s)
- Jian Li
- Department of Orthopaedics, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Xiuyu Qin
- Department of Orthopaedics, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, 030032, China
| | - Jiani Wang
- Department of Paediatric Medicine, Shanxi Medical University, Taiyuan, 030001, China
| | - Wangzhe Yang
- Department of Orthopaedics, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Junjun Bai
- Department of Orthopaedics, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Jia Lv
- Department of Orthopaedics, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, China.
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Wu J, Feng Q, Yang D, Xu H, Wen W, Xu H, Miao J. Biomechanical evaluation of different sizes of 3D printed cage in lumbar interbody fusion-a finite element analysis. BMC Musculoskelet Disord 2023; 24:85. [PMID: 36726086 PMCID: PMC9890703 DOI: 10.1186/s12891-023-06201-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 01/27/2023] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVE To study the biomechanical characteristics of various tissue structures of different sizes of 3D printed Cage in lumbar interbody fusion. METHODS A finite element model of normal spine was reconstructed and verified. Pedicle screws and Cage of different sizes were implanted in the L4/5 segment to simulate lumbar interbody fusion. The range of motion of the fixed and cephalic adjacent segment, the stress of the screw-rod system, the stress at the interface between cage and L5 endplate, and intervertebral disc pressure of the adjacent segment were calculated and analyzed. RESULTS The range of motion and intervertebral disc pressure of the adjacent segment of each postoperative model were larger than those of the intact model, but there was not much difference between them. The stress of cage-endplate interface was also larger than that of the intact model. However, the difference is that the stress of the endplate and the screw-rod system has a tendency to decrease with the increase of the axial area of cage. CONCLUSIONS Cage with larger axial area in lumbar interbody fusion can reduce the stress of internal fixation system and endplate, but will not increase the range of motion and intervertebral disc pressure of adjacent segment. It has a certain effect in preventing the cage subsidence, internal fixation system failure and screw rod fracture.
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Affiliation(s)
- Jincheng Wu
- grid.33763.320000 0004 1761 2484Department of Spine Surgery, Tianjin Hospital, Tianjin University, Jiefangnanlu 406, Hexi District, Tianjin, China
| | - Qing Feng
- grid.33763.320000 0004 1761 2484Department of Spine Surgery, Tianjin Hospital, Tianjin University, Jiefangnanlu 406, Hexi District, Tianjin, China
| | - Dongmei Yang
- grid.284723.80000 0000 8877 7471Southern Medical University, Guangzhou City, Guangdong China
| | - Hanpeng Xu
- grid.33763.320000 0004 1761 2484Department of Spine Surgery, Tianjin Hospital, Tianjin University, Jiefangnanlu 406, Hexi District, Tianjin, China
| | - Wangqiang Wen
- grid.443397.e0000 0004 0368 7493The First Affiliated Hospital of Hainan Medical University, Haikou City, Hainan China
| | - Haoxiang Xu
- The Second People’s Hospital of Hefei, Hefei, Anhui China
| | - Jun Miao
- grid.33763.320000 0004 1761 2484Department of Spine Surgery, Tianjin Hospital, Tianjin University, Jiefangnanlu 406, Hexi District, Tianjin, China
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Ramakrishna VAS, Chamoli U, Mukhopadhyay SC, Diwan AD, Prusty BG. Measuring compressive loads on a 'smart' lumbar interbody fusion cage: Proof of concept. J Biomech 2023; 147:111440. [PMID: 36640615 DOI: 10.1016/j.jbiomech.2023.111440] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/08/2022] [Accepted: 01/06/2023] [Indexed: 01/11/2023]
Abstract
There are several complications associated with lumbar interbody fusion surgery however, pseudarthrosis (non-union) presents a multifaceted challenge in the postoperative management of the patient. Rates of pseudarthrosis range from 3 to 20 % in patients with healthy bone and 20 to 30 % in patients with osteoporosis. The current methods in post-operative follow-up - radiographs and CT, have high false positive rates and poor agreement between them. The aim of this study was to develop and test a proof-of-concept load-sensing interbody cage that may be used to monitor fusion progression. Piezoresistive pressure sensors were calibrated and embedded within a polyether ether ketone (PEEK) interbody cage. Silicone and poly (methyl methacrylate) (PMMA) were inserted in the graft regions to simulate early and solid fusion. The load-sensing cage was subjected to distributed and eccentric compressive loads up to 900 N between synthetic lumbar vertebral bodies. Under maximum load, the anterior sensors recorded a 56-58 % reduction in pressure in the full fusion state compared to early fusion. Lateral regions measured a 36-37 % stress reduction while the central location reduced by 45 %. The two graft states were distinguishable by sensor-recorded pressure at lower loads. The sensors more effectively detected left and right eccentric loads compared to anterior and posterior. Further, the load-sensing cage was able to detect changes in endplate stiffness. The proof-of-concept 'smart' cage could detect differences in fusion state, endplate stiffness, and loading conditions in this in vitro experimental setup.
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Affiliation(s)
- Vivek A S Ramakrishna
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, Kensington, New South Wales, Australia; Spine Labs, St. George & Sutherland Clinical School, University of New South Wales, Sydney, New South Wales, Australia; School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, New South Wales, Australia.
| | - Uphar Chamoli
- Spine Labs, St. George & Sutherland Clinical School, University of New South Wales, Sydney, New South Wales, Australia; School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Ultimo, New South Wales, Australia
| | - Subhas C Mukhopadhyay
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, New South Wales, Australia
| | - Ashish D Diwan
- Spine Labs, St. George & Sutherland Clinical School, University of New South Wales, Sydney, New South Wales, Australia; Spine Service, Department of Orthopaedic Surgery St. George Hospital Campus, Kogarah, New South Wales, Australia
| | - B Gangadhara Prusty
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, Kensington, New South Wales, Australia
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Griffoni C, Tedesco G, Canella V, Nataloni A, Zerbi A, Tosini G, Gasbarrini A, Barbanti-Brodano G. Ceramic bone graft substitute (Mg-HA) in spinal fusion: A prospective pilot study. Front Bioeng Biotechnol 2022; 10:1050495. [PMID: 36532576 PMCID: PMC9748738 DOI: 10.3389/fbioe.2022.1050495] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 10/28/2022] [Indexed: 04/14/2024] Open
Abstract
Background: Iliac crest bone graft (ICBG) is considered the gold standard for spine surgical procedures to achieve a successful fusion due to its known osteoinductive and osteoconductive properties. However, complications related to harvesting procedure and donor site morbidity have been largely reported in the literature, favoring the development of a wide range of alternative products to be used as bone graft extenders or substitutes for spine fusion. Among all, ceramic-based biomaterials have been widely studied and employed in the last years as bone graft substitutes. Methods: We report here the results of a prospective pilot study aimed to evaluating the grade of ossification obtained by the use of an Mg-doped hydroxyapatite (HA) product to achieve postero-lateral fusion in degenerative spine diseases. Results: Results show a successful degree of fusion of about 62% at the 12-month follow-up and an improvement of quality of life and health status following surgery, as evaluated by clinical scores (ODI, VAS, and EQ-5L). No adverse events related to the material were reported. Conclusion: The present pilot study shows the effectiveness and the safety profile of an Mg-doped HA bone graft substitute used to achieve postero-lateral fusion in the treatment of degenerative spine diseases, laying down the basis for further larger clinical investigations.
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Affiliation(s)
- Cristiana Griffoni
- Department of Spine Surgery, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Giuseppe Tedesco
- Department of Spine Surgery, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | | | | | - Alberto Zerbi
- Istituti Clinici Iseni, Fondazione Iseni y Nervi, Lonate Pozzolo, Italy
| | - Giovanni Tosini
- Department of Spine Surgery, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
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Loenen ACY, Connor J, Johnson S, Davis K, Hannigan N, Barnes T, Arts JJ, van Rietbergen B. Peptide Enhanced Bone Graft Substitute Presents Improved Short-Term Increase in Bone Volume and Construct Stiffness Compared to Iliac Crest Autologous Bone in an Ovine Lumbar Interbody Fusion Model. Global Spine J 2022; 12:1330-1337. [PMID: 33406899 PMCID: PMC9393976 DOI: 10.1177/2192568220979839] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
STUDY DESIGN Preclinical ovine model. OBJECTIVE To assess the in vivo efficacy and safety of the P-15 L bone graft substitute and compare its performance to autologous iliac crest bone graft (ICBG) for lumbar interbody fusion indications. METHODS Thirty skeletally mature sheep underwent lumbar interbody fusion surgery. Half of the sheep received autologous ICBG and the other half the peptide enhanced bone graft substitute (P-15 L). Following termination at 1, 3, and 6 months after surgery, the operated segments were analyzed using micro computed tomography (µCT), histology, and destructive mechanical testing. Additional systemic health monitoring was performed for the P-15 L group. RESULTS One month after surgery, there was only minor evidence of bone remodeling and residual graft material could be clearly observed within the cage. There was active bone remodeling between 1 and 3 months after surgery. At 3 months after surgery significantly denser and stiffer bone was found in the P-15 L group, whereas at 6 months, P-15 L and ICBG gave similar fusion results. The P-15 L bone graft substitute did not have any adverse effects on systemic health. CONCLUSIONS The drug device combination P-15 L was demonstrated to be effective and save for lumbar interbody fusion as evidenced by this ovine model. Compared to autologous ICBG, P-15 L seems to expedite bone formation and remodeling but in the longer-term fusion results were similar.
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Affiliation(s)
- Arjan C. Y. Loenen
- Laboratory for Experimental Orthopaedics, Department of Orthopaedic Surgery, CAPHRI, Maastricht University Medical Centre, Maastricht, the Netherlands,Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | | | | | | | | | | | - Jacobus J. Arts
- Laboratory for Experimental Orthopaedics, Department of Orthopaedic Surgery, CAPHRI, Maastricht University Medical Centre, Maastricht, the Netherlands,Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Bert van Rietbergen
- Laboratory for Experimental Orthopaedics, Department of Orthopaedic Surgery, CAPHRI, Maastricht University Medical Centre, Maastricht, the Netherlands,Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands,Bert van Rietbergen, Department of Biomedical Engineering, Eindhoven University of Technology, Buidling 15, Gemini-Zuid (4.118), PO Box 513, 5600 MB Eindhoven, the Netherlands; Groene Loper, TU Eindhoven, De Rondom 70, 5612AP Eindhoven, the Netherlands.
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11
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Weinberg DS, Eoh JH, Manz WJ, Fakunle OP, Dawes AM, Park ET, Rhee JM. Off-label usage of RhBMP-2 in posterior cervical fusion is not associated with early increased complication rate and has similar clinical outcomes. Spine J 2022; 22:1079-1088. [PMID: 35181539 DOI: 10.1016/j.spinee.2022.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 02/04/2022] [Accepted: 02/07/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Arthrodesis is important for the success of posterior cervical fusion (PCF), however, there exists limited data regarding the safety and efficacy of bone morphogenic protein (BMP) in PCF. PURPOSE The primary objective was to evaluate early postoperative complications associated with BMP in PCF and determine whether BMP leads to adverse early clinical outcomes. A secondary objective was to determine the optimal location for BMP sponge placement, within the facet joint (IF) or elsewhere, and the optimal dosage/level. DESIGN Retrospective, consecutive case-control study. PATIENT SAMPLE Seven hundred sixty-five patients who underwent PCF OUTCOME MEASURES: Patient-reported outcomes (PROs), complications, arthrodesis, optimum dose/level of BMP METHODS: Surgical data, including preoperative diagnosis, levels fused, type of bone graft, BMP dose (when used), and fusion technique were recorded. Complications were assessed by reviewing the medical record encompassing the first 6-weeks postoperative. These included medical, neurological, and wound-related complications and reoperation. Neurological complications were defined as any new weakness, radicular pain, or numbness. PROs were collected, including SF36, VAS, EQ-5D, and NDI scores. To determine the optimal dosage and location for BMP placement, a sub-analysis was performed. RESULTS There were no significant differences between the BMP and no BMP group with regards to wound complications, neurological complications, or reoperation. There were no differences in PROs between BMP and no BMP. Placement of BMP for IF and at a dose of 0.87 mg/level minimized wound-related complications. The BMP group had a higher fusion rate compared to the no BMP group (96% vs. 91%, p=.02) when assessed 1 year post-operatively. CONCLUSION BMP was not associated with a higher rate of early complications after PCF when the dose was minimized. Complications thought to be associated with BMP, such as compressive seroma, radiculitis, and wound-related complications were not seen at a higher rate. PROs at early follow-up were similar. Placement of BMP for IF and at lower doses than previously reported may minimize complications.
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Affiliation(s)
- Douglas S Weinberg
- Department of Orthopedic Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jae Hyung Eoh
- Department of Orthopedics, Pohang Semyeong Christianity Hospital, Pohang, Korea
| | - Wesley J Manz
- Emory University School of Medicine, Atlanta, GA, USA
| | | | | | - Eric T Park
- Emory University School of Medicine, Atlanta, GA, USA
| | - John M Rhee
- Department of Orthopedic Surgery and Neurosurgery, The Emory Spine Center, Emory University School of Medicine, 59 Executive Park South, Atlanta, GA, USA.
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12
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Khalid SI, Nunna RS, Shanker RM, Thomson KB, Parola R, Adogwa O, Mehta AI. Bone Morphogenetic Protein in Anterior Lumbar Interbody Fusions: A Propensity-Matched Medicare Outcome Analysis. Int J Spine Surg 2022; 16:8301. [PMID: 35705214 PMCID: PMC9421204 DOI: 10.14444/8301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Bone morphogenetic protein (BMP) is a costly agent commonly used in spine surgery. Its effectiveness and complication profile have never been studied in a large, propensity-matched population following its approval by the Food and Drug Administration for use in single-level anterior lumbar interbody fusion (ALIF) surgeries. OBJECTIVE To investigate the rate of symptomatic pseudarthrosis or need for revision surgery after single-level stand-alone ALIFs with and without the use of BMP. METHODS Medicare Standard Analytic files derived from Medicare parts A and B were used to identify adult patients who underwent single-level ALIF procedures with and without use of BMP between 2004 and 2014. Patients were propensity matched based on their age, gender, and history of diabetes mellitus, hypertension, chronic kidney disease, body mass index greater than 30 kg/m2, smoking, rheumatoid arthritis, and osteoporosis. Sensitivity analysis using adjusted multivariate logistic regression models was also performed. The primary outcomes were the rates of symptomatic pseudarthrosis or need for revision surgery. RESULTS The propensity-matched population analyzed in this study contained 22,380 patients undergoing single-level ALIF (8971 [40.6%] with BMP and 13,139 [59.4%] without BMP). Both patient groups were balanced at baseline. The rate of symptomatic pseudarthrosis in the propensity-matched analysis was higher in the BMP group (1.9% vs 1.4%, P < 0.05). BMP use during single-level ALIFs was associated with 44% increased odds of developing pseudarthrosis (OR 1.44, 95% CI 1.16-1.76). However, there was no statistically significant difference in the rate of revision surgery between groups (3.7% vs 3.5%, P = 0.49). CONCLUSIONS BMP use in single-level ALIFs may be associated with increased risk of symptomatic pseudarthrosis. Large prospective pragmatic trials are needed to corroborate our findings. LEVEL OF EVIDENCE: 3
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Affiliation(s)
- Syed I Khalid
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, USA
- Surgery, Rush University Medical Center, Chicago, IL, USA
| | - Ravi S Nunna
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, USA
| | | | | | - Rown Parola
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, USA
| | - Owoicho Adogwa
- Department of Neurosurgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ankit I Mehta
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, USA
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A systematic review and meta-analysis of fusion rate enhancements and bone graft options for spine surgery. Sci Rep 2022; 12:7546. [PMID: 35534520 PMCID: PMC9085837 DOI: 10.1038/s41598-022-11551-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 04/20/2022] [Indexed: 12/01/2022] Open
Abstract
Our study aimed to evaluate differences in outcomes of patients submitted to spinal fusion using different grafts measuring the effectiveness of spinal fusion rates, pseudarthrosis rates, and adverse events. Applying the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement, this systematic review and meta-analysis identified 64 eligible articles. The main inclusion criteria were adult patients that were submitted to spinal fusion, autologous iliac crest (AIC), allograft (ALG), alloplastic (ALP; hydroxyapatite, rhBMP-2, rhBMP-7, or the association between them), and local bone (LB), whether in addition to metallic implants or not, was applied. We made a comparison among those groups to evaluate the presence of differences in outcomes, such as fusion rate, hospital stay, follow-up extension (6, 12, 24, and 48 months), pseudarthrosis rate, and adverse events. Sixty-four studies were identified. LB presented significantly higher proportions of fusion rates (95.3% CI 89.7–98.7) compared to the AIC (88.6% CI 84.8–91.9), ALG (87.8% CI 80.8–93.4), and ALP (85.8% CI 75.7–93.5) study groups. Pseudarthrosis presented at a significantly lower pooled proportion of ALG studies (4.8% CI 0.1–15.7) compared to AIC (8.6% CI 4.2–14.2), ALP (7.1% CI 0.9–18.2), and LB (10.3% CI 1.8–24.5). ALP and AIC studies described significantly more cases of adverse events (80 events/404 patients and 860 events/2001 patients, respectively) compared to LB (20 events/311 patients) and ALG (73 events/459 patients). Most studies presented high risk-of-bias scores. Based on fusion rates and adverse events proportions, LB showed a superior trend among the graft cases we analyzed. However, our review revealed highly heterogeneous data and a need for more rigorous studies to better address and assist surgeons’ choices of the best spinal grafts.
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14
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Physico-Chemical Characteristics and Posterolateral Fusion Performance of Biphasic Calcium Phosphate with Submicron Needle-Shaped Surface Topography Combined with a Novel Polymer Binder. MATERIALS 2022; 15:ma15041346. [PMID: 35207887 PMCID: PMC8880136 DOI: 10.3390/ma15041346] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/02/2022] [Accepted: 02/03/2022] [Indexed: 12/04/2022]
Abstract
A biphasic calcium phosphate with submicron needle-shaped surface topography combined with a novel polyethylene glycol/polylactic acid triblock copolymer binder (BCP-EP) was investigated in this study. This study aims to evaluate the composition, degradation mechanism and bioactivity of BCP-EP in vitro, and its in vivo performance as an autograft bone graft (ABG) extender in a rabbit Posterolateral Fusion (PLF) model. The characterization of BCP-EP and its in vitro degradation products showed that the binder hydrolyses rapidly into lactic acid, lactide oligomers and unaltered PEG (polyethylene glycol) without altering the BCP granules and their characteristic submicron needle-shaped surface topography. The bioactivity of BCP-EP after immersion in SBF revealed a progressive surface mineralization. In vivo, BCP-EP was assessed in a rabbit PLF model by radiography, manual palpation, histology and histomorphometry up to 12 weeks post-implantation. Twenty skeletally mature New Zealand (NZ) White Rabbits underwent single-level intertransverse process PLF surgery at L4/5 using (1) autologous bone graft (ABG) alone or (2) by mixing in a 1:1 ratio with BCP-EP (BCP-EP/ABG). After 3 days of implantation, histology showed the BCP granules were in direct contact with tissues and cells. After 12 weeks, material resorption and mature bone formation were observed, which resulted in solid fusion between the two transverse processes, following all assessment methods. BCP-EP/ABG showed comparable fusion rates with ABG at 12 weeks, and no graft migration or adverse reaction were noted at the implantation site nor in distant organs.
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Abstract
STUDY DESIGN Retrospective case-control study. OBJECTIVE The aim of this study was to evaluate the prevalence of pseudarthrosis following antepsoas (ATP) lumbar and lumbosacral fusions. SUMMARY OF BACKGROUND DATA Pseudarthrosis is a feared complication following spinal fusions and may affect their clinical outcomes. To date there are no sufficient data on the fusion rate following ATP lumbar and lumbosacral arthrodesis. METHODS This is a retrospective review of 220 patients who underwent lumbar minimally invasive antepsoas (MIS-ATP) fusions between January 2008 and February 2019 who have at least 1-year postoperative computed tomography (CT) follow-up scans. Fusion was graded using CT scans imaging and adopting a 1-4 grading scale (1, definitely fused; 2, likely fused; 3, likely not fused; 4, definitely not fused/nonunion). Grades 3 or 4 indicate pseudarthrosis. RESULTS A total of 220 patients (average age: 66 years, 82 males (37.2%), and 127 (57.7%) smokers) were included. Eight patients (3.6%) developed pseudarthrosis. A total of 693 discs were addressed using the ATP approach. Of those, 681 (98.3%) were considered fused (641 levels [92.5%] were "definitely fused" and 40 levels [5.8%] were "Likely fused") and 12 discs (1.7%) developed pseudarthrosis (seven levels [1.0%] were "likely not fused" and five levels (0.7%) were "definitely not fused"). The highest rate of pseudarthrosis was found at L5-S1 (4.8%) compared to the L1-L5 discs (0-2%). Of 127 smokers, six developed pseudarthrosis (odds ratio = 2.3, P = 0.3). The fusion rates were 95.3% and 97.8% for smokers and nonsmokers, respectively. Of the eight patients who developed pseudarthrosis, only four (50%) were symptomatic, of whom two (25%) required revision surgery. Both of these patients were smokers. The overall revision rate due to pseudarthrosis was 0.9% (two of 220 patients). CONCLUSION The MIS-ATP technique results in a high fusion rate (96.4% of patients; 98.3% of levels). Pseudarthrosis was noted mostly at the L5-S1 discs and in smokers.Level of Evidence: 4.
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Chan JL, Ravinsky RA, Johnson JP, Baron EM. Image Guidance-Assisted Decompression and Removal of Heterotopic Ossification Following the Use of Recombinant Human Bone Morphogenetic Protein-2 in Transforaminal Lumbar Interbody Fusion. Cureus 2021; 13:e20045. [PMID: 34987926 PMCID: PMC8717937 DOI: 10.7759/cureus.20045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2021] [Indexed: 11/16/2022] Open
Abstract
Heterotopic ossification (HO) following the use of recombinant human bone morphogenetic protein-2 (rhBMP-2) in the setting of transforaminal lumbar interbody fusion (TLIF) or posterior lumbar interbody fusion (PLIF) is a troublesome and well-described postoperative complication. There is currently no consensus regarding the treatment of this offending pathology. In this report, we present a retrospective single-surgeon review of 14 patients who underwent image-guided decompression of HO. We describe a new technique where navigation demonstrates a safe and thorough decompression compared to that with fluoroscopy or anatomical landmarks alone. To evaluate successful decompression, we reviewed patient self-reported clinical outcomes. Seven patients demonstrated positive results, while three had mixed outcomes and four showed poor outcomes. While more studies are needed to determine the overall efficacy of intraoperative navigation-assisted decompression, findings from this small cohort of patients suggest that it is a useful technique in the setting of the removal of heterotopic bone.
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Lo WC, Tsai LW, Yang YS, Chan RWY. Understanding the Future Prospects of Synergizing Minimally Invasive Transforaminal Lumbar Interbody Fusion Surgery with Ceramics and Regenerative Cellular Therapies. Int J Mol Sci 2021; 22:3638. [PMID: 33807361 PMCID: PMC8037583 DOI: 10.3390/ijms22073638] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/22/2021] [Accepted: 03/26/2021] [Indexed: 12/14/2022] Open
Abstract
Transforaminal lumber interbody fusion (TLIF) is the last resort to address the lumber degenerative disorders such as spondylolisthesis, causing lower back pain. The current surgical intervention for these abnormalities includes open TLIF. However, in recent years, minimally invasive TLIF (MIS-TLIF) has gained a high momentum, as it could minimize the risk of infection, blood loss, and post-operative complications pertaining to fusion surgery. Further advancement in visualizing and guiding techniques along with grafting cage and materials are continuously improving the safety and efficacy of MIS-TLIF. These assistive techniques are also playing a crucial role to increase and improve the learning curve of surgeons. However, achieving an appropriate output through TLIF still remains a challenge, which might be synergized through 3D-printing and tissue engineering-based regenerative therapy. Owing to their differentiation potential, biomaterials such as stem/progenitor cells may contribute to restructuring lost or damaged tissues during MIS-TLIF, and this therapeutic efficacy could be further supplemented by platelet-derived biomaterials, leading to improved clinical outcomes. Thus, based on the above-mentioned strategies, we have comprehensively summarized recent developments in MIS-TLIF and its possible combinatorial regenerative therapies for rapid and long-term relief.
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Affiliation(s)
- Wen-Cheng Lo
- Department of Surgery, Division of Neurosurgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan; (Y.-S.Y.); (R.W.Y.C.)
- Department of Neurosurgery, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Taipei Neuroscience Institute, Taipei Medical University, Taipei 11031, Taiwan
| | - Lung-Wen Tsai
- Department of Medical Education and Research, Taipei Medical University Hospital, Taipei 11031, Taiwan;
| | - Yi-Shan Yang
- Department of Surgery, Division of Neurosurgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan; (Y.-S.Y.); (R.W.Y.C.)
- Department of Neurosurgery, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Taipei Neuroscience Institute, Taipei Medical University, Taipei 11031, Taiwan
| | - Ryan Wing Yuk Chan
- Department of Surgery, Division of Neurosurgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan; (Y.-S.Y.); (R.W.Y.C.)
- Department of Neurosurgery, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Taipei Neuroscience Institute, Taipei Medical University, Taipei 11031, Taiwan
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18
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Chang DG, Park JB, Han Y. Surgical outcomes of two kinds of demineralized bone matrix putties/local autograft composites in instrumented posterolateral lumbar fusion. BMC Musculoskelet Disord 2021; 22:200. [PMID: 33596888 PMCID: PMC7890888 DOI: 10.1186/s12891-021-04073-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 02/08/2021] [Indexed: 11/10/2022] Open
Abstract
Background This study aimed to assess the surgical outcomes of two kinds of demineralized bone matrix (DBM) putties/local autograft composites in instrumented posterolateral lumbar fusion (PLF). Methods Twenty-seven fusion segments of 19 patients, who underwent decompression and instrumented PLF for lumbar spinal stenosis or degenerative spondylolisthesis less than grade 1, were included in this study. The PLF mass consisted of different two kinds of DBMs (Grafton® and DBX®) and local autograft. Next, 7.5 cc of Grafton® DBM/local autograft composite was implanted on the left side, and the same amount of DBX® DBM/local autograft composite was implanted on the right side in the same patient. The PLF masses of 54 total sides (27 Grafton® sides and 27 DBX® sides) were assessed for fusion based on both flexion/extension lateral radiographs and computed tomography images at 12 and 24 months postoperatively. Clinical symptoms were also evaluated. Results At 12 months postoperatively, the fusion rates for the Grafton® and DBX® sides were 59.5 and 51.9%, respectively; the difference was not statistically significant (P = 0.425). At 24 months postoperatively, the fusion rates for the Grafton® and DBX® sides increased to 70.4 and 66.7%, respectively, but the difference was still not statistically significant (P = 0.574). Diabetes mellitus, smoking, and obesity (body mass index ≥25) negatively affected the fusion rate of both the Grafton® and DBX® sides. Visual analog scores for lower back pain and leg pain and Oswestry Disability Index were significantly improved after surgery (both, P < 0.01). No deep or superficial infections occurred postoperatively. No patients underwent revision surgery due to nonunion during follow-up. Conclusions Our results suggest that two kinds of DBMs/local autograft composites might be considered as useful bone graft substitute in instrumented posterolateral fusion for lumbar spinal stenosis or degenerative spondylolisthesis less than grade 1.
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Affiliation(s)
- Dong-Gune Chang
- Department of Orthopaedic Surgery, College of Medicine, Inje University Sanggye Paik Hospital, Inje University, Seoul, South Korea
| | - Jong-Beom Park
- Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul, South Korea. .,Department of Orthopaedic Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Korea, 271 Cheonbo-ro, Uijeongbu-si, Gyeonggi-do, 11765, South Korea.
| | - Yangjun Han
- Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul, South Korea
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Cottrill E, Lazzari J, Pennington Z, Ehresman J, Schilling A, Dirckx N, Theodore N, Sciubba D, Witham T. Oxysterols as promising small molecules for bone tissue engineering: Systematic review. World J Orthop 2020; 11:328-344. [PMID: 32908817 PMCID: PMC7453739 DOI: 10.5312/wjo.v11.i7.328] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 05/08/2020] [Accepted: 07/01/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Bone tissue engineering is an area of continued interest within orthopaedic surgery, as it promises to create implantable bone substitute materials that obviate the need for autologous bone graft. Recently, oxysterols – oxygenated derivatives of cholesterol – have been proposed as a novel class of osteoinductive small molecules for bone tissue engineering. Here, we present the first systematic review of the in vivo evidence describing the potential therapeutic utility of oxysterols for bone tissue engineering.
AIM To systematically review the available literature examining the effect of oxysterols on in vivo bone formation.
METHODS We conducted a systematic review of the literature following PRISMA guidelines. Using the PubMed/MEDLINE, Embase, and Web of Science databases, we queried all publications in the English-language literature investigating the effect of oxysterols on in vivo bone formation. Articles were screened for eligibility using PICOS criteria and assessed for potential bias using an expanded version of the SYRCLE Risk of Bias assessment tool. All full-text articles examining the effect of oxysterols on in vivo bone formation were included. Extracted data included: Animal species, surgical/defect model, description of therapeutic and control treatments, and method for assessing bone growth. Primary outcome was fusion rate for spinal fusion models and percent bone regeneration for critical-sized defect models. Data were tabulated and described by both surgical/defect model and oxysterol employed. Additionally, data from all included studies were aggregated to posit the mechanism by which oxysterols may mediate in vivo bone formation.
RESULTS Our search identified 267 unique articles, of which 27 underwent full-text review. Thirteen studies (all preclinical) met our inclusion/exclusion criteria. Of the 13 included studies, 5 employed spinal fusion models, 2 employed critical-sized alveolar defect models, and 6 employed critical-sized calvarial defect models. Based upon SYRCLE criteria, the included studies were found to possess an overall “unclear risk of bias”; 54% of studies reported treatment randomization and 38% reported blinding at any level. Overall, seven unique oxysterols were evaluated: 20(S)-hydroxycholesterol, 22(R)-hydroxycholesterol, 22(S)-hydroxycholesterol, Oxy4/Oxy34, Oxy18, Oxy21/Oxy133, and Oxy49. All had statistically significant in vivo osteoinductive properties, with Oxy4/Oxy34, Oxy21/Oxy133, and Oxy49 showing a dose-dependent effect in some cases. In the eight studies that directly compared oxysterols to rhBMP-2-treated animals, similar rates of bone growth occurred in the two groups. Biochemical investigation of these effects suggests that they may be primarily mediated by direct activation of Smoothened in the Hedgehog signaling pathway.
CONCLUSION Present preclinical evidence suggests oxysterols significantly augment in vivo bone formation. However, clinical trials are necessary to determine which have the greatest therapeutic potential for orthopaedic surgery patients.
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Affiliation(s)
- Ethan Cottrill
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Julianna Lazzari
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Zach Pennington
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Jeff Ehresman
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Andrew Schilling
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Naomi Dirckx
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Nicholas Theodore
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Daniel Sciubba
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Timothy Witham
- Department of Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
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20
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Greene AC, Hsu WK. Technologies to Enhance Spinal Fusion: Bench to Bedside. HSS J 2020; 16:108-112. [PMID: 32523477 PMCID: PMC7253564 DOI: 10.1007/s11420-019-09733-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 10/09/2019] [Indexed: 02/07/2023]
Affiliation(s)
- Allison C. Greene
- Department of Orthopaedic Surgery, Northwestern University, 676 N. Saint Clair St., Suite 1350, Chicago, IL 60611 USA ,Simpson Querrey Institute, Northwestern University, 303 E. Superior St., Suite 11-131, Chicago, IL 60611 USA
| | - Wellington K. Hsu
- Department of Orthopaedic Surgery, Northwestern University, 676 N. Saint Clair St., Suite 1350, Chicago, IL 60611 USA ,Simpson Querrey Institute, Northwestern University, 303 E. Superior St., Suite 11-131, Chicago, IL 60611 USA
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21
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Smith KA, Russo GS, Vaccaro AR, Arnold PM. Scientific, Clinical, Regulatory, and Economic Aspects of Choosing Bone Graft/Biological Options in Spine Surgery. Neurosurgery 2020; 84:827-835. [PMID: 30032187 DOI: 10.1093/neuros/nyy322] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 06/17/2018] [Indexed: 01/07/2023] Open
Abstract
Spinal arthrodesis is a major element of the spinal surgeon's practice. To attain successful fusion rates, attention must be paid to spinal segment immobilization and proper selection of bone graft. Autogenous bone graft (ie, ICBG), the "gold standard," with or without graft extenders and enhancers provides the foundation for most spinal fusions. ABG is the only graft option containing all 3 factors of new bone growth: osteoconductivity, osteoinductivity, and osteogenicity. While many bone graft alternatives function well as bone graft extenders, only growth factors proteins (ie, rhBMP-2 or OP-2) function as bone graft enhancers and substitutes. The search for optimal hybrid interbody cages, bone graft substitutes, autogenous or allogenic stem cells, and nanostructure scaffolds for release of growth factors continues.
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Affiliation(s)
- Kyle A Smith
- Department of Neurosurgery, University of Kansas Medical Center, Kansas City, Kansas
| | - Glenn S Russo
- Department of Orthopedics, Rothman Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Alexander R Vaccaro
- Department of Orthopedics, Rothman Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Paul M Arnold
- Department of Neurosurgery, University of Kansas Medical Center, Kansas City, Kansas
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22
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Formica M, Vallerga D, Zanirato A, Cavagnaro L, Basso M, Divano S, Mosconi L, Quarto E, Siri G, Felli L. Fusion rate and influence of surgery-related factors in lumbar interbody arthrodesis for degenerative spine diseases: a meta-analysis and systematic review. Musculoskelet Surg 2020; 104:1-15. [PMID: 31894472 DOI: 10.1007/s12306-019-00634-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 12/21/2019] [Indexed: 12/20/2022]
Abstract
The aim of this meta-analysis and systematic review is to summarize and critically analyze the influence of surgery-related factors in lumbar interbody fusion for degenerative spine diseases. A systematic review of the literature was carried out with a primary search being performed on Medline through PubMed. The 2009 PRISMA flowchart and checklist were taken into account. Sixty-seven articles were included in the analysis: 48 studies were level IV of evidence, whereas 19 were level III. All interbody fusion techniques analyzed have proved to reach a good fusion rate. An overall mean fusion rate of 93% (95% CI 92-95%, p < 0.001) was estimated pooling the selected studies. The influence of sagittal parameters and cages features in fusion rate was not clear. Autograft is considered the gold standard material. The use of synthetic bone substitutes and biological factors alone or combined with bone graft have shown conflicting results. Low level of evidence studies and high heterogeneity (χ2 = 271.4, df = 72, p < 0.001; I2 = 73.5%, τ2 = 0.05) in data analysis could result in the risk of bias. Further high-quality studies would better clarify these results in the future.
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Affiliation(s)
- M Formica
- Clinica Ortopedica, Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - D Vallerga
- Clinica Ortopedica, Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy.
| | - A Zanirato
- Clinica Ortopedica, Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - L Cavagnaro
- Clinica Ortopedica, Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - M Basso
- Clinica Ortopedica, Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - S Divano
- Clinica Ortopedica, Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - L Mosconi
- Clinica Ortopedica, Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - E Quarto
- Clinica Ortopedica, Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - G Siri
- Department of Mathematics, University of Genoa, Via Dodecaneso 35, 16146, Genoa, GE, Italy
| | - L Felli
- Clinica Ortopedica, Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
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23
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Cottrill E, Ahmed AK, Lessing N, Pennington Z, Ishida W, Perdomo-Pantoja A, Lo SF, Howell E, Holmes C, Goodwin CR, Theodore N, Sciubba DM, Witham TF. Investigational growth factors utilized in animal models of spinal fusion: Systematic review. World J Orthop 2019; 10:176-191. [PMID: 31041160 PMCID: PMC6475812 DOI: 10.5312/wjo.v10.i4.176] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 01/03/2019] [Accepted: 01/26/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Over 400000 Americans annually undergo spinal fusion surgeries, yet up to 40% of these procedures result in pseudoarthrosis even with iliac crest autograft, the current “gold standard” treatment. Tissue engineering has the potential to solve this problem via the creation of bone grafts involving bone-promoting growth factors (e.g., bone morphogenetic protein 2). A broad assessment of experimental growth factors is important to inform future work and clinical potential in this area. To date, however, no study has systematically reviewed the investigational growth factors utilized in preclinical animal models of spinal fusion.
AIM To review all published studies assessing investigational growth factors for spinal fusion in animal models and identify promising agents for translation.
METHODS We conducted a systematic review of the literature using PubMed, Embase, Cochrane Library, and Web of Science databases with searches run on May 29th, 2018. The search query was designed to include all non-human, preclinical animal models of spinal fusion reported in the literature without a timespan limit. Extracted data for each model included surgical approach, level of fusion, animal species and breed, animal age and sex, and any other relevant characteristics. The dosages/sizes of all implant materials, spinal fusion rates, and follow-up time points were recorded. The data were analyzed and the results reported in tables and text. PRISMA guidelines were followed for this systematic review.
RESULTS Twenty-six articles were included in this study, comprising 14 experimental growth factors: AB204 (n = 1); angiopoietin 1 (n = 1); calcitonin (n = 3); erythropoietin (n = 1); basic fibroblast growth factor (n = 1); growth differentiation factor 5 (n = 4), combined insulin-like growth factor 1 + transforming growth factor beta (n = 4); insulin (n = 1); NELL-1 (n = 5); noggin (n = 1); P-15 (n = 1); peptide B2A (n = 2); and secreted phosphoprotein 24 (n = 1). The fusion rates of the current gold standard treatment (autologous iliac crest bone graft, ICBG) and the leading clinically used growth factor (BMP-2) ranged widely in the included studies, from 0-100% for ICBG and from 13%-100% for BMP-2. Among the identified growth factors, calcitonin, GDF-5, NELL-1, and P-15 resulted in fusion rates of 100% in some cases. In addition, six growth factors - AB204, angiopoietin 1, GDF-5, insulin, NELL-1, and peptide B2A - resulted in significantly enhanced fusion rates compared to ICBG, BMP-2, or other internal control in some studies. Large heterogeneity in animal species, fusion method, and experimental groups and time points was observed across the included studies, limiting the direct comparison of the growth factors identified herein.
CONCLUSION Several promising investigational growth factors for spinal fusion have been identified herein; directly comparing the fusion efficacy and safety of these agents may inform clinical translation.
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Affiliation(s)
- Ethan Cottrill
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
| | - A Karim Ahmed
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
| | - Noah Lessing
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
| | - Zachary Pennington
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
| | - Wataru Ishida
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
| | | | - Sheng-fu Lo
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
| | - Elizabeth Howell
- Department of Neurosurgery, Duke University Medical Center, Durham, NC 27710, United States
| | - Christina Holmes
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
| | - C Rory Goodwin
- Department of Neurosurgery, Duke University Medical Center, Durham, NC 27710, United States
| | - Nicholas Theodore
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
| | - Daniel M Sciubba
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
| | - Timothy F Witham
- Department of Neurosurgery, The Johns Hopkins Hospital, Baltimore, MD 21287, United States
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24
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Bolger C, Jones D, Czop S. Evaluation of an increased strut porosity silicate-substituted calcium phosphate, SiCaP EP, as a synthetic bone graft substitute in spinal fusion surgery: a prospective, open-label 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 2019; 28:1733-1742. [DOI: 10.1007/s00586-019-05926-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 01/30/2019] [Indexed: 10/27/2022]
Abstract
Abstract
Purpose
Silicate-substituted calcium phosphate-enhanced porosity (SiCaP EP, Inductigraft™, Altapore) is a synthetic bone graft material with enhanced strut porosity of 31–47%. SiCaP EP remains to be fully clinically evaluated in patients undergoing instrumented posterolateral fusion (PLF) surgery. We conducted a prospective, open-label, non-randomised, multicentre clinical study to evaluate efficacy of SiCaP EP as bone grafting material in PLF surgery with instrumentation for treatment of spinal disorders.
Methods
Patients with degenerative disc disease, spondylolisthesis or spinal stenosis underwent PLF surgery with SiCaP EP. The primary endpoint was evaluated in the per protocol population (N = 102) as solid fusion at postoperative month 12 assessed using computed tomography scans, with motion assessed using flexion–extension radiographs. Clinical outcomes included the Oswestry Disability Index, 36-item short-form health survey for quality-of-life, visual analog scale for pain scores and neurological assessments. Adverse events were recorded.
Results
Successful fusion was achieved in 59/89 (66.3%) patients at month 6, 88/102 patients (86.3%) at month 12 (primary endpoint) and 87/96 (90.6%) patients at month 24. Disability and pain reduced following surgery. Quality-of-life improved and neurological function was maintained postoperatively. Forty-three (33.3%) of the 129 patients who underwent surgery experienced adverse events; back pain was most frequent (n = 10); nine and 14 patients experienced serious adverse events judged related to device and procedure, respectively.
Conclusions
Enhanced strut porosity SiCaP EP provided high (month 12: 86.3%) spinal fusion success rates in PLF surgery. Fusion success was associated with improved clinical outcomes in patients within 12 months, relative to baseline.
ClinicalTrials.gov identifier
NCT01452022
Graphical abstract
These slides can be retrieved under Electronic Supplementary Material.
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25
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Iyer S, Kim HJ, Bao H, Smith JS, Gupta M, Albert TJ, Protopsaltis TS, Mundis GM, Passias P, Neuman BJ, Klineberg EO, Lafage V, Ames CP. The Posterior Use of BMP-2 in Cervical Deformity Surgery Does Not Result in Increased Early Complications: A Prospective Multicenter Study. Global Spine J 2018; 8:622-628. [PMID: 30202717 PMCID: PMC6125935 DOI: 10.1177/2192568218760538] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
STUDY DESIGN Prospective cohort study. OBJECTIVES To describe the rate of short-term complications following the posterior use of recombinant human bone morphogenetic protein-2 (rhBMP-2) in cervical deformity (CD) surgery. METHODS CD patients from 2013 to 2015 were enrolled in a prospective, multicenter database. Patients were divided into those receiving rhBMP-2 (BMP) and no rhBMP-2 (NOBMP). The relationship between BMP use, demographic variables surgical variables, radiographic parameters and complications was evaluated. RESULTS A total of 100 patients (47 BMP, 53 NOBMP) were included. Follow-up time averaged 7.6 months (range 3-12 months). An average of 13.6mg of BMP was used per person with 1.49 mg per level. Compared with the NOBMP group, patients in the BMP group were older (P = .03). BMP was more commonly used in patients that and had longer prior fusions (6.0 vs 2.5, P < .01). There were no differences between groups with regards to a history of surgery, Charlson Comorbidity Index, estimated blood loss, operation time, fusion levels, and surgical approach. The maintenance of radiographic parameters at 6-month follow-up was similar. There were no differences in terms of total complication incidence, total complications per person, major complications per person or any specific complication. Linear regression and Pearson correlation analysis did not reveal any strong r2 values (r2 = 0.09, 0.08, 0.06) between the use of BMP and complications (major or operative). CONCLUSIONS BMP use was not directly associated with an increased incidence of early complications in this prospective cohort of operative adult CD patients. Its use was associated with increased number of levels instrumented and fused.
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Affiliation(s)
- Sravisht Iyer
- Hospital for Special Surgery, New York, NY, USA,Sravisht Iyer, Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021, USA.
| | - Han Jo Kim
- Hospital for Special Surgery, New York, NY, USA
| | - Hongda Bao
- Hospital for Special Surgery, New York, NY, USA
| | - Justin S. Smith
- University of Virginia Health System, Charlottesville, VA, USA
| | - Munish Gupta
- Washington University School of Medicine, St Louis, MO, USA
| | - Todd J. Albert
- Hospital for Special Surgery, New York, NY, USA,Weill Cornell Medical College, New York, NY, USA
| | | | | | - Peter Passias
- New York University Center for Musculoskeletal Care, New York, NY, USA
| | - Brian J. Neuman
- Johns Hopkins University School of Medicine, Baltimore, MD, USA
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26
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A Prospective, Randomized, Multicenter Study Comparing Silicated Calcium Phosphate versus BMP-2 Synthetic Bone Graft in Posterolateral Instrumented Lumbar Fusion for Degenerative Spinal Disorders. Spine (Phila Pa 1976) 2018; 43:E860-E868. [PMID: 29652784 DOI: 10.1097/brs.0000000000002678] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN A prospective, Phase IV, multicenter, randomized study. OBJECTIVE The aim of this study was to compare vertebral fusion success rates following posterolateral fusion [(PLF)/posterolateral intertransverse fusion (PITF)] surgery. The surgical procedure combined posterior lumbar interbody fusion (PLIF) and PLF with internal fixation over one or two levels using silicated calcium phosphate (SiCaP) or bone morphogenetic protein (BMP)-2 as graft material in patients with a degenerative disorder of the lumbar spine. SUMMARY OF BACKGROUND DATA Few controlled trials have evaluated the bone graft materials available to surgeons treating patients with spinal disorders, including degenerative disc disease, spondylolisthesis, and disc herniation. METHODS Following randomization, the surgical procedure consisting of PLIF and PLF with internal fixation over one or two levels was performed using SiCaP or BMP-2. No other osteoconductive/osteoinductive graft materials were permitted. Spinal fusion was assessed radiographically at ≤24 months. Clinical outcomes (pain on visual analog scale, Oswestry Disability Index, SF-36) and adverse events (AEs) were monitored. RESULTS One hundred three patients were enrolled. At 12 months, fusion was achieved in 25 of 35 (71.4%) of the SiCaP and 20 of 27 (74.1%) of the BMP-2 group, respectively (P = 1.000). At 24 months, the fusion rate was 78.6% and 84.8% for SiCaP and BMP-2, respectively (P = 0.5613). Clinical outcomes improved similarly in both groups over time. AEs were consistent with this surgical population. CONCLUSION SiCaP was safe and well tolerated in patients with degenerative spinal disorders requiring PLF and provided fusion rates similar to BMP-2. LEVEL OF EVIDENCE 2.
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27
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Parajón A, Alimi M, Navarro-Ramirez R, Christos P, Torres-Campa JM, Moriguchi Y, Lang G, Härtl R. Minimally Invasive Transforaminal Lumbar Interbody Fusion: Meta-analysis of the Fusion Rates. What is the Optimal Graft Material? Neurosurgery 2018; 81:958-971. [PMID: 28419312 DOI: 10.1093/neuros/nyx141] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 02/28/2017] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF) is an increasingly popular procedure with several potential advantages over traditional open TLIF. OBJECTIVE The current study aimed to compare fusion rates of different graft materials used in MIS-TLIF, via meta-analysis of the published literature. METHODS A Medline search was performed and a database was created including patient's type of graft, clinical outcome, fusion rate, fusion assessment modality, and duration of follow-up. Meta-analysis of the fusion rate was performed using StatsDirect software (StatsDirect Ltd, Cheshire, United Kingdom). RESULTS A total of 1533 patients from 40 series were included. Fusion rates were high, ranging from 91.8% to 99%. The imaging modalities used to assess fusion were computed tomography scans (30%) and X-rays (70%). Comparison of all recombinant human bone morphogenetic protein (rhBMP) series with all non-rhBMP series showed fusion rates of 96.6% and 92.5%, respectively. The lowest fusion rate was seen with isolated use of autologous local bone (91.8%). The highest fusion rate was observed with combination of autologous local bone with bone extender and rhBMP (99.1%). The highest fusion rate without the use of BMP was seen with autologous local bone + bone extender (93.1%). The reported complication rate ranged from 0% to 35.71%. Clinical improvement was observed in all studies. CONCLUSION Fusion rates are generally high with MIS-TLIF regardless of the graft material used. Given the potential complications of iliac bone harvesting and rhBMP, use of other bone graft options for MIS-TLIF is reasonable. The highest fusion rate without the use of rhBMP was seen with autologous local bone plus bone extender (93.1%).
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Affiliation(s)
- Avelino Parajón
- Department of Neurological Surgery, Weill Cornell Brain and Spine Center, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, New York
| | - Marjan Alimi
- Department of Neurological Surgery, Weill Cornell Brain and Spine Center, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, New York
| | - Rodrigo Navarro-Ramirez
- Department of Neurological Surgery, Weill Cornell Brain and Spine Center, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, New York
| | - Paul Christos
- Department of Statistics, Weill Cornell Medicine, New York, New York
| | - Jose M Torres-Campa
- Department of Neurological Surgery, Weill Cornell Brain and Spine Center, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, New York
| | - Yu Moriguchi
- Department of Neurological Surgery, Weill Cornell Brain and Spine Center, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, New York
| | - Gernot Lang
- Department of Neurological Surgery, Weill Cornell Brain and Spine Center, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, New York.,Department of Orthopedics and Trauma Surgery, Medical Center - Albert-Ludwigs-University of Freiburg, Faculty of Medicine, Albert-Ludwigs-University of Freiburg, Germany
| | - Roger Härtl
- Department of Neurological Surgery, Weill Cornell Brain and Spine Center, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, New York
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28
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Spinal Biologics in Minimally Invasive Lumbar Surgery. Minim Invasive Surg 2018; 2018:5230350. [PMID: 29850240 PMCID: PMC5907390 DOI: 10.1155/2018/5230350] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 02/25/2018] [Indexed: 12/28/2022] Open
Abstract
As the use of minimally invasive spine (MIS) fusion approaches continues to grow, increased scrutiny is being placed on its outcomes and efficacies against traditional open fusion surgeries. While there are many factors that contribute to the success of achieving spinal arthrodesis, selecting the optimal fusion biologic remains a top priority. With an ever-expanding market of bone graft substitutes, it is important to evaluate each of their use as it pertains to MIS techniques. This review will summarize the important characteristics and properties of various spinal biologics used in minimally invasive lumbar surgeries and compare their fusion rates via a systematic review of published literature.
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29
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Hsu WK, Goldstein CL, Shamji MF, Cho SK, Arnold PM, Fehlings MG, Mroz TE. Novel Osteobiologics and Biomaterials in the Treatment of Spinal Disorders. Neurosurgery 2017; 80:S100-S107. [PMID: 28350951 DOI: 10.1093/neuros/nyw085] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 01/11/2017] [Indexed: 12/12/2022] Open
Abstract
Spinal osteobiologics have evolved substantially in this century after the development of many product categories such as growth factors, allograft, and stem cells. The indications for the use of novel biologics within spine surgery are rapidly expanding as the mechanism of each is elucidated. While the knowledge base of bone morphogenetic protein increases with each subsequent year, the application of new nanotechnology and cell-based strategies are being reported. This review will discuss the most recent data in novel osteobiologics, and where we could use future study.
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Affiliation(s)
- Wellington K Hsu
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | | | - Mohammed F Shamji
- Department of Orthopaedic Surgery, University of Toronto, Toronto, Canada
| | - Sam K Cho
- Department of Orthopaedic Surgery, Mount Sinai Hospital, New York, New York
| | - Paul M Arnold
- Department of Neurosurgery, University of Kansas Medical Center, Kansas City, Missouri
| | - Michael G Fehlings
- Department of Orthopaedic Surgery, University of Toronto, Toronto, Canada
| | - Tom E Mroz
- Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, Ohio
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30
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A new bioinspired collagen-hydroxyapatite bone graft substitute in adult scoliosis surgery: results at 3-year follow-up. J Appl Biomater Funct Mater 2017; 15:e262-e270. [PMID: 28604992 PMCID: PMC6379889 DOI: 10.5301/jabfm.5000366] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/08/2017] [Indexed: 12/11/2022] Open
Abstract
Background Spinal fusion is a common procedure used for surgical treatment of spinal
deformity. In recent years, many bone graft substitutes (BGS) have been
developed to provide good arthrodesis when the available autologous bone
harvested from the patient is not enough. The aim of this study was to
analyze the use of a new-generation composite material (RegenOss) made of
Mg-hydroxyapatite nanoparticles nucleated on type I collagen to obtain long
posterolateral fusion in adult scoliosis surgery. Methods A total of 41 patients who underwent spinal fusion for the treatment of adult
scoliosis were retrospectively analyzed. According to Lenke classification,
visual analog scale (VAS) score and Oswestry Disability Index (ODI) score,
radiographic rates of bone union were evaluated before surgery and at 6, 12
and 36 months of follow-up. Fusion was considered to be successful when
criteria for Lenke grade A or B were satisfied. Patient-related risk factors
were considered for the evaluation of the final outcome. Results At 36-month follow-up, radiographic evidence of spinal fusion was present in
the majority of patients (95.1%). A time-dependent statistically significant
improvement was evidenced after surgery for all clinical outcomes evaluated.
Based on the demographic data collected, there were no statistically
significant factors determining fusion. The correction of deformity was
maintained at different time points. No intraoperative or postoperative
complications were recorded. Conclusions The present study demonstrated that RegenOss can safely be used to achieve
good arthrodesis when associated with autologous bone graft to obtain long
spinal fusion in the treatment of adult scoliosis.
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Fomekong E, Dufrane D, Berg BV, André W, Aouassar N, Veriter S, Raftopoulos C. Application of a three-dimensional graft of autologous osteodifferentiated adipose stem cells in patients undergoing minimally invasive transforaminal lumbar interbody fusion: clinical proof of concept. Acta Neurochir (Wien) 2017; 159:527-536. [PMID: 28039550 DOI: 10.1007/s00701-016-3051-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 12/08/2016] [Indexed: 02/06/2023]
Abstract
BACKGROUND The authors applied a scaffold-free osteogenic three-dimensional (3D) graft made of adipose-derived mesenchymal stem cells (AMSCs) in patients undergoing minimally invasive transforaminal lumbar interbody fusion (MI-TLIF). METHODS Three patients (two patients and one patient with 1 and 2 levels, respectively) with degenerative spondylolisthesis underwent MI-TLIF with 3D graft made of AMSCs. To obtain the AMSCs, fatty tissue was collected from the abdomen by lipoaspiration and differentiated afterwards in our Cell/Tissue bank. Clinical outcomes, including the Oswestry Disability Index (ODI) and visual analog scale (VAS) as well as fusion status were assessed preoperatively and up to 12 months postoperatively. RESULTS At 12 months, all four operated AMSC levels could be assessed (n = 4). Grade 3 fusion could be confirmed at two levels out of four. Mean VAS score improved from 8.3 to 2 and ODI also improved from 47 to 31%. No donor site complication was observed. The final AMSC osteogenic product was stable, did not rupture with forceps manipulation, and was easily implanted directly into the cage with no marked modification of operating time. CONCLUSIONS A scaffold-free 3D graft made of AMSCs can be manufactured and used as a promising alternative for spinal fusion procedures. Nevertheless, further studies of a larger series of patients are needed to confirm its effectiveness.
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Affiliation(s)
- E Fomekong
- Department of Neurosurgery, University Hospital Saint Luc, Université Catholique de Louvain (UCL), Avenue Hippocrate, 10, 1200, Brussels, Belgium
| | - D Dufrane
- Endocrine Cell Therapy Unit, Center of Tissue and Cell Therapy, university hospital Saint-Luc, Université Catholique de Louvain (UCL), Avenue Hippocrate, 10, 1200, Brussels, Belgium
| | - B Vande Berg
- Department of Radiology, University Hospital Saint Luc, Université Catholique de Louvain (UCL), Avenue Hippocrate, 10, 1200, Brussels, Belgium
| | - W André
- Endocrine Cell Therapy Unit, Center of Tissue and Cell Therapy, university hospital Saint-Luc, Université Catholique de Louvain (UCL), Avenue Hippocrate, 10, 1200, Brussels, Belgium
| | - N Aouassar
- Endocrine Cell Therapy Unit, Center of Tissue and Cell Therapy, university hospital Saint-Luc, Université Catholique de Louvain (UCL), Avenue Hippocrate, 10, 1200, Brussels, Belgium
| | - S Veriter
- Endocrine Cell Therapy Unit, Center of Tissue and Cell Therapy, university hospital Saint-Luc, Université Catholique de Louvain (UCL), Avenue Hippocrate, 10, 1200, Brussels, Belgium
| | - C Raftopoulos
- Department of Neurosurgery, University Hospital Saint Luc, Université Catholique de Louvain (UCL), Avenue Hippocrate, 10, 1200, Brussels, Belgium.
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Bone Union Rate Following Instrumented Posterolateral Lumbar Fusion: Comparison between Demineralized Bone Matrix versus Hydroxyapatite. Asian Spine J 2016; 10:1149-1156. [PMID: 27994793 PMCID: PMC5165007 DOI: 10.4184/asj.2016.10.6.1149] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 04/13/2016] [Accepted: 04/27/2016] [Indexed: 11/08/2022] Open
Abstract
Study Design Retrospective study. Purpose To compare the union rate of posterolateral lumbar fusion (PLF) using demineralized bone matrix (DBM) versus hydroxyapatite (HA) as bone graft extender. Overview of Literature To our knowledge, there has been no clinical trial to compare the outcomes of DBM versus HA as a graft material for PLF. Methods We analyzed prospectively collected data from consecutive 79 patients who underwent instrumented PLF. Patients who received DBM were assigned to group B (n=38), and patients who received HA were assigned into group C (n=41). The primary study outcome was fusion rate assessed with radiographs. The secondary outcomes included pain intensity using a visual analogue scale, functional outcome using Oswestry disability index score, laboratory tests of inflammatory profiles and infection rate. Results One year postoperatively, bone fusion was achieved in 73% in group B and 58% in group C without significant difference between the groups (p=0.15). There were no differences between the groups with respect to secondary outcomes. Conclusions DBM would provide noninferior outcomes compared to the HA as a fusion material for PLF, and could be a notable alternative.
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Rodriguez RU, Kemper N, Breathwaite E, Dutta SM, Huber A, Murchison A, Chen S, Hsu EL, Hsu WK, Francis MP. Demineralized bone matrix fibers formable as general and custom 3D printed mold-based implants for promoting bone regeneration. Biofabrication 2016; 8:035007. [DOI: 10.1088/1758-5090/8/3/035007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Abstract
OBJECT Failed solid bony fusion, or pseudarthrosis, is a well-known complication of lumbar arthrodesis. Recent advances in radiographic technology, biologics, instrumentation, surgical technique, and understanding of the local biology have all aided in the prevention and treatment of pseudarthrosis. Here, the current literature on the diagnosis and management of lumbar pseudarthroses is reviewed. METHODS A systematic literature review was conducted using the MEDLINE and Embase databases in order to search for the current radiographie diagnosis and surgical treatment methods published in the literature (1985 to present). Inclusion criteria included: 1) published in English; 2) level of evidence I-III; 3) diagnosis of degenerative lumbar spine conditions and/or history of lumbar spine fusion surgery; and 4) comparative studies of 2 different surgical techniques or comparative studies of imaging modality versus surgical exploration. RESULTS Seven studies met the inclusion criteria for current radiographie imaging used to diagnose lumbar pseudarthrosis. Plain radiographs and thin-cut CT scans were the most common method for radiographie diagnosis. PET has been shown to be a valid imaging modality for monitoring in vivo active bone formation. Eight studies compared the surgical techniques for managing and preventing failed lumbar fusion. The success rates for the treatment of pseudarthrosis are enhanced with the use of rigid instrumentation. CONCLUSIONS Spinal fusion rates have improved secondary to advances in biologies, instrumentation, surgical techniques, and understanding of local biology. Treatment of lumbar pseudarthrosis includes a variety of surgical options such as replacing loose instrumentation, use of more potent biologies, and interbody fusion techniques. Prevention and recognition are important tenets in the algorithm for the management of spinal pseudarthrosis.
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Affiliation(s)
- Danielle S Chun
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois; and
| | - Kevin C Baker
- Department of Orthopaedic Surgery, William Beaumont Hospital, Royal Oak, Michigan
| | - Wellington K Hsu
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois; and
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Minardi S, Taraballi F, Pandolfi L, Tasciotti E. Patterning Biomaterials for the Spatiotemporal Delivery of Bioactive Molecules. Front Bioeng Biotechnol 2016; 4:45. [PMID: 27313997 PMCID: PMC4889608 DOI: 10.3389/fbioe.2016.00045] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 05/20/2016] [Indexed: 11/13/2022] Open
Abstract
The aim of tissue engineering is to promote the repair of functional tissues. For decades, the combined use of biomaterials, growth factors (GFs), and stem cells has been the base of several regeneration strategies. Among these, biomimicry emerged as a robust strategy to efficiently address this clinical challenge. Biomimetic materials, able to recapitulate the composition and architecture of the extracellular matrix, are the materials of choice, for their biocompatibility and higher rate of efficacy. In addition, it has become increasingly clear that restoring the complex biochemical environment of the target tissue is crucial for its regeneration. Toward this aim, the combination of scaffolds and GFs is required. The advent of nanotechnology significantly impacted the field of tissue engineering by providing new ways to reproduce the complex spatial and temporal biochemical patterns of tissues. This review will present the most recent approaches to finely control the spatiotemporal release of bioactive molecules for various tissue engineering applications.
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Affiliation(s)
- Silvia Minardi
- Department of Regenerative Medicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Francesca Taraballi
- Department of Regenerative Medicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Laura Pandolfi
- Department of Regenerative Medicine, Houston Methodist Research Institute, Houston, TX, USA
- College of Materials Science and Engineering, University of Chinese Academy of Science, Beijing, China
| | - Ennio Tasciotti
- Department of Regenerative Medicine, Houston Methodist Research Institute, Houston, TX, USA
- Department of Orthopedics, Houston Methodist Hospital, Houston, TX, USA
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Garin C, Boutrand S. Natural hydroxyapatite as a bone graft extender for posterolateral spine arthrodesis. INTERNATIONAL ORTHOPAEDICS 2016; 40:1875-82. [PMID: 26961192 DOI: 10.1007/s00264-016-3140-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 02/15/2016] [Indexed: 12/01/2022]
Abstract
PURPOSE The aim of this retrospective analysis of spinal fusion, was to document the clinical, functional, and radiological outcomes with a local bone graft plus the highly osteoconductive hydroxyapatite, bio-derived Orthoss®, with or without bone marrow aspirate. METHODS Forty seven patients submitted to spinal posterolateral fusion were operated for four major indications: scoliosis in young patients (11), degenerative spine (18), lumbosacral transitional anomalies in young adults (14), and spine trauma (four). Sixteen patients had more than four levels fused. In addition to spinal decompression and instrumented fusion, autologous bone grafts from the excised lamina were augmented with Orthoss® granules in a 1:1 ratio. In addition iliac crest bone marrow aspirate was used in 70 % of the patients. The results were assessed clinically in terms of pain, and return to school or professional activities were checked at three, six, and 12 months following surgery with a mean follow-up of 20 months. In scoliotic patients, correction of the major angle was evaluated from one to four years after surgery. RESULTS Pain persistence was reported only in four cases, after three months after surgery. A functional recovery was noted in almost all patients groups within these three months. Progressive bone formation with evidence of bone fusion masses were already observed at six months. No fusion failure was observed. CONCLUSIONS Local bone enhanced by an osteoconductive long-term stable scaffold, used with and without bone marrow aspirate, led to successful fusion in all patients by six months while functional recovery was reported already within three to six months.
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Affiliation(s)
- Christophe Garin
- Capio Polyclinique du Beaujolais, 120 ancienne route de Beaujeu, 69653, Villefranche sur Saône Cedex, France.
| | - Séverine Boutrand
- Capio Polyclinique du Beaujolais, 120 ancienne route de Beaujeu, 69653, Villefranche sur Saône Cedex, France
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Allogeneic mesenchymal precursor cells (MPCs) combined with an osteoconductive scaffold to promote lumbar interbody spine fusion in an ovine model. Spine J 2016; 16:389-99. [PMID: 26291397 DOI: 10.1016/j.spinee.2015.08.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 06/22/2015] [Accepted: 08/11/2015] [Indexed: 02/03/2023]
Abstract
BACKGROUND Advances in immunomagnetic cell sorting have enabled isolation and purification of pleuripotent stem cells from marrow aspirates and have expanded stem cell therapies to include allogeneic sources. PURPOSE This study aimed to determine the safety and efficacy of allogeneic mesenchymal precursor cells (MPCs) combined with an osteoconductive scaffold in lumbar interbody spinal fusion using an ovine model. STUDY DESIGN Thirty-two skeletally mature ewes underwent a single-level interbody fusion procedure using a Polyetheretherketone fusion cage supplemented with either iliac crest autograft (AG) or an osteconductive scaffold (Mastergraft Matrix, Medtronic, Memphis, TN, USA) with 2.5×10(6) MPCs, 6.25×10(6) MPCs, or 12.5×10(6) MPCs. METHODS Plain radiographs and computed tomography scans were scored for bridging bone at multiple points during healing and at necropsy. The biomechanical competency of fusion was scored by manual palpation and quantified using functional radiographs at necropsy. Postnecropsy histopathology and histomorphometric analysis assessed the local response to MPC treatment and quantified the volume and connectivity of newly formed bridging bone. Safety was assessed by serum biochemistry, hematology, and organ histopathology. RESULTS Mesenchymal precursor cell treatment caused no adverse systemic or local tissue responses. All analyses indicated MPCs combined with an osteoconductive scaffold achieved similar or better fusion success as AG treatment after 16 weeks, and increasing the MPC dose did not enhance fusion. Manual palpation of the fusion site indicated more than 75% of MPC-treated and 65% of AG-treated animals achieved rigid fusion, which was corroborated with functional radiography. Computed tomography fusion scores indicated all animals in the MPC- and AG-treatment groups were fused at 16 weeks, yet X-ray scores indicated only 67% of the AG-treated animals were fused. Histomorphometry analyses showed equivalent outcomes for fusion connectivity and bony fusion area for MPC- and AG-treated groups. Approximately 6% residual graft material remained in the MPC-treated fusion sites at 16 weeks. CONCLUSIONS Adult allogeneic MPCs delivered using an osteoconductive scaffold were both safe and efficacious in this ovine spine interbody fusion model. These results support the use ofallogeneic MPCs as an alternative to AG for lumbar interbody spinal fusion procedures.
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Baron EM, Mejía DM, Drazin D, Anand N. Postoperative Cyst Associated with Bone Morphogenetic Protein Use in Posterior and Transforaminal Lumbar Interbody Fusion Managed Conservatively: Report of Two Cases. Cureus 2016; 8:e485. [PMID: 27014519 PMCID: PMC4786379 DOI: 10.7759/cureus.485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Bone morphogenetic protein use in spinal surgery for off-label indications continues to remain popular. One area where its use has known associated radicular complications is posterior or transforaminal lumbar interbody fusion. These complications include radiculitis, cyst development, and heterotopic ossification, amongst others. Typically, cyst development has been treated surgically. We present two cases of bone morphogenetic protein-related cysts treated medically and thus, present medical treatment as an alternative treatment option.
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Affiliation(s)
| | - Diana M Mejía
- Department of Physical Medicine and Rehabilitation, University of Miami - Jackson Memorial Hospital
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40
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Lee SS, Hsu EL, Mendoza M, Ghodasra J, Nickoli MS, Ashtekar A, Polavarapu M, Babu J, Riaz RM, Nicolas JD, Nelson D, Hashmi SZ, Kaltz SR, Earhart JS, Merk BR, McKee JS, Bairstow SF, Shah RN, Hsu WK, Stupp SI. Gel scaffolds of BMP-2-binding peptide amphiphile nanofibers for spinal arthrodesis. Adv Healthc Mater 2015; 4:131-141. [PMID: 24753455 PMCID: PMC4206675 DOI: 10.1002/adhm.201400129] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 03/17/2014] [Indexed: 11/12/2022]
Abstract
Peptide amphiphile (PA) nanofibers formed by self-assembly can be customized for specific applications in regenerative medicine through the use of molecules that display bioactive signals on their surfaces. Here, the use of PA nanofibers with binding affinity for the bone promoting growth factor BMP-2 to create a gel scaffold for osteogenesis is reported. With the objective of reducing the amount of BMP-2 used clinically for successful arthrodesis in the spine, amounts of growth factor incorporated in the scaffolds that are 10 to 100 times lower than that those used clinically in collagen scaffolds are used. The efficacy of the bioactive PA system to promote BMP-2-induced osteogenesis in vivo is investigated in a rat posterolateral lumbar intertransverse spinal fusion model. PA nanofiber gels displaying BMP-2-binding segments exhibit superior spinal fusion rates relative to controls, effectively decreasing the required therapeutic dose of BMP-2 by 10-fold. Interestingly, a 42% fusion rate is observed for gels containing the bioactive nanofibers without the use of exogenous BMP-2, suggesting the ability of the nanofiber to recruit endogenous growth factor. Results obtained here demonstrate that bioactive biomaterials with capacity to bind specific growth factors by design are great targets for regenerative medicine.
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Affiliation(s)
- Sungsoo S Lee
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Erin L Hsu
- Department of Orthopaedic Surgery, Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Marco Mendoza
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Jason Ghodasra
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Michael S Nickoli
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Amruta Ashtekar
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Mahesh Polavarapu
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Jacob Babu
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Rehan M Riaz
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Joseph D Nicolas
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - David Nelson
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Sohaib Z Hashmi
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Start R Kaltz
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Jeffrey S Earhart
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Bradley R Merk
- Department of Orthopaedic Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Jeff S McKee
- Baxter international Inc., Deerfield, IL 60016, USA
| | | | - Ramille N Shah
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Wellington K Hsu
- Department of Orthopaedic Surgery, Department of Neurological Surgery, Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Samuel I Stupp
- Department of Materials Science and Engineering, Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
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Abstract
Retrospective radiographic analysis.To determine the fusion rate of stand-alone lateral lumbar interbody fusion (LLIF). Biomechanical studies have indicated that LLIF may be more stable than anterior or transforaminal lumbar interbody fusion. Early clinical reports of stand-alone LLIF have shown success in obtaining fusion and indirectly decompressing nerve roots. A consecutive case series of stand-alone LLIF was analyzed with chart and radiographic review. Non-union was determined by symptomatology consistent with non-union and absence of bridging bone on the CT scan. Thirty-nine levels of stand alone LLIF were performed in 23 patients. Eleven patients received 1-level surgery, 7 patients received 2-level surgery, 3 patients received 3-level surgery, and 1 patient received 4-level surgery. Excluding 1 infected case, we analyzed 37 levels of stand alone LLIF in 22 patients. Non-union incidence was 7 levels in 6 patients. Non-union rate was 7/37 (19%) per level and 6/22 (27%) per patient. While our study population was relatively low, a non-union rate of 19% to 27% is concerning for modern spine surgery. Currently in our practice, we occasionally still perform stand-alone LLIF utilizing 22 mm wide grafts in low-demand levels in non-smoking and non-osteoporotic patients. However, in a majority of patients, we provide supplemental fixation: bilateral pedicle screws in most patients and unilateral pedicle screws or spinous process plates in some patients.
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Affiliation(s)
- Robert Watkins
- From the Marina Spine Center, Marina del Rey, CA (RW, RW-III); and University of Southern California, Los Angeles, CA (RH)
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Walker B, Koerner J, Sankarayanaryanan S, Radcliff K. A consensus statement regarding the utilization of BMP in spine surgery. Curr Rev Musculoskelet Med 2014; 7:208-19. [PMID: 24947400 DOI: 10.1007/s12178-014-9224-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Recombinant human bone morphogenetic protein - 2 (rh-BMP-2) was first approved by the United States Food and Drug Administration (FDA) in 2002 for use in anterior lumbar interbody fusions. Since that time, it has been estimated that "off label" use accounts for 85 % of applications. Original, industry sponsored studies demonstrated superior fusion rates with decreased incidence of complications when compared with traditional iliac crest bone graft. These studies have been criticized for potential bias and newer research has detailed potential complications as well as alternative applications. Potential off label uses of rhBMP-2 include: anterior lumbar fusions, single level posterior lumbar fusions, multiple level posterior lumbar fusions, posterior cervical fusions, long deformity fusions, in the presence of vertebral osteomyelitis, and in patients with history of malignancy. A review of the literature related to rhBMP-2 was conducted to evaluate its use for the above-mentioned applications with a special focus on fusion rates, observed complications, and clinical or radiographic outcomes.
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Affiliation(s)
- Brett Walker
- Department of Orthopedic Surgery, Michigan State University, McLaren Oakland, Pontiac, MI, USA
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