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Guitteny S, Lee CF, Amirouche F. Experimentally Validated Finite Element Analysis of Thoracic Spine Compression Fractures in a Porcine Model. Bioengineering (Basel) 2024; 11:96. [PMID: 38247973 PMCID: PMC10813756 DOI: 10.3390/bioengineering11010096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 12/22/2023] [Accepted: 01/11/2024] [Indexed: 01/23/2024] Open
Abstract
Vertebral compression fractures (VCFs) occur in 1 to 1.5 million patients in the US each year and are associated with pain, disability, altered pulmonary function, secondary vertebral fracture, and increased mortality risk. A better understanding of VCFs and their management requires preclinical models that are both biomechanically analogous and accessible. We conducted a study using twelve spinal vertebrae (T12-T14) from porcine specimens. We created mathematical simulations of vertebral compression fractures (VCFs) using CT scans for reconstructing native anatomy and validated the results by conducting physical axial compression experiments. The simulations accurately predicted the behavior of the physical compressions. The coefficient of determination for stiffness was 0.71, the strength correlation was 0.88, and the failure of the vertebral bodies included vertical splitting on the lateral sides or horizontal separation in the anterior wall. This finite element method has important implications for the preventative, prognostic, and therapeutic management of VCFs. This study also supports the use of porcine specimens in orthopedic biomechanical research.
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Affiliation(s)
- Sacha Guitteny
- Department of Orthopaedic Surgery, University of Illinois College of Medicine at Chicago, Chicago, IL 60607, USA; (S.G.); (C.F.L.)
| | - Cadence F. Lee
- Department of Orthopaedic Surgery, University of Illinois College of Medicine at Chicago, Chicago, IL 60607, USA; (S.G.); (C.F.L.)
| | - Farid Amirouche
- Department of Orthopaedic Surgery, University of Illinois College of Medicine at Chicago, Chicago, IL 60607, USA; (S.G.); (C.F.L.)
- Orthopaedic and Spine Institute, NorthShore University Health System, Chicago, IL 60611, USA
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Li M, Zhang T, Zhang R, Zhang H, Zhang D, Hu N, Wang Y. Systematic Retrospective Analysis of Risk Factors and Preventive Measures of Bone Cement Leakage in Percutaneous Kyphoplasty. World Neurosurg 2023; 171:e828-e836. [PMID: 36592691 DOI: 10.1016/j.wneu.2022.12.117] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 12/27/2022] [Accepted: 12/28/2022] [Indexed: 01/01/2023]
Abstract
OBJECTIVE In this study, we aimed to analyze the risk factors of bone cement leakage in percutaneous kyphoplasty (PKP) treatment of osteoporotic vertebral compression fractures (OVCFs), and provide suggestions for reducing bone cement leakage. METHODS A retrospective study of 517 cases of OVCFs treated with PKP were divided into 2 groups according to whether they had bone cement leakage or not, leakage group (n = 72) and non-leakage group (n = 445). The risk factors of leakage were systematically analyzed using clinical baseline data, imaging observation data, and surgery-related factors. To select the statistically significant results (P < 0.05) among the risk factors mentioned above, we used the binary logistic regression method to identify the main risk factors. RESULTS The univariate analysis of clinical baseline data,imaging observation data, and surgery-related factors showed that bone mineral density (BMD) (P < 0.001), hypertension (P < 0.05), injury factors (P < 0.01), cortical defect (P < 0.001), grade of vertebral compression (P < 0.001), surgical approach (P < 0.05), stage of bone cement injection (P < 0.01), and balloon pressure (P < 0.05) were the risk factors for bone cement leakage. The recovery rate of vertebral height, and the Cobb angle correction rate were lower in the bone cement leakage group (P < 0.001). The correction effect of kyphosis after operation was limited. Binary logistic analysis results showed that BMD (odds ratio [OR] 5.605), cortical defect (OR 3.115), and stage of bone cement injection (OR 2.385) were bone cement leakage-independent risk factors. CONCLUSIONS Impairment of BMD value, defects of cortical bone, and inappropriate stage of bone cement injection will increase the risk of bone cement leakage in PKP treatment and limit PKP effects.
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Affiliation(s)
- Mi Li
- Harbin Medical University, Harbin, Heilongjiang, China; Department of Orthopedic Surgery, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Tao Zhang
- Department of Orthopedic Surgery, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Rui Zhang
- Department of Orthopedic Surgery, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Hanjun Zhang
- Department of Orthopedic Surgery, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - DaPeng Zhang
- Department of Orthopedic Surgery, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Naiwu Hu
- Department of Orthopedic Surgery, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Yansong Wang
- Harbin Medical University, Harbin, Heilongjiang, China; Department of Spine Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China.
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Zhang Y, Zhang T, Ge X, Ma Y, Cui Z, Wu S, Liang Y, Zhu S, Li Z. A Three-Dimensional Cement Quantification Method for Decision Prediction of Vertebral Recompression after Vertebroplasty. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:2330472. [PMID: 35602341 PMCID: PMC9119757 DOI: 10.1155/2022/2330472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 04/25/2022] [Indexed: 11/17/2022]
Abstract
Objective Proposing parameters to quantify cement distribution and increasing accuracy for decision prediction of vertebroplasty postoperative complication. Methods Finite element analysis was used to biomechanically assess vertebral mechanics (n = 51) after percutaneous vertebroplasty (PVP) or kyphoplasty (PKP). The vertebral space was divided into 27 portions. The numbers of cement occupied portions and numbers of cement-endplate contact portions were defined as overall distribution number (oDN) and overall endplate contact number (oEP), respectively. And cement distribution was parametrized by oDN and oEP. The determination coefficients of vertebral mechanics and parameters (R 2) can validate the correlation of proposed parameters with vertebral mechanics. Results oDN and oEP were mainly correlated with failure load (R 2 = 0.729) and stiffness (R 2 = 0.684), respectively. oDN, oEP, failure load, and stiffness had obvious difference between the PVP group and the PKP group (P < 0.05). The regional endplate contact number in the front column is most correlated with vertebral stiffness (R 2 = 0.59) among all regional parameters. Cement volume and volume fraction are not dominant factors of vertebral augmentation, and they are not suitable for postoperative fracture risk prediction. Conclusions Proposed parameters with high correlation on vertebral mechanics are promising for clinical utility. The oDN and oEP can strongly affect augmented vertebral mechanics thus is suitable for postoperative fracture risk prediction. The parameters are beneficial for decision-making process of revision surgery necessity. Parametrized methods are also favorable for surgeon's preoperative planning. The methods can be inspirational for clinical image recognition development and auxiliary diagnosis.
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Affiliation(s)
- Yanming Zhang
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Tao Zhang
- Department of Orthopedic Surgery, Tianjin First Central Hospital, Tianjin 300190, China
| | - Xiang Ge
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, School of Mechanical Engineering, Tianjin University, Tianjin 300354, China
| | - Yong Ma
- Pain Department, The Third People's Hospital of Yunnan Province, Kunming 650010, China
| | - Zhenduo Cui
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Shuilin Wu
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Yanqin Liang
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Shengli Zhu
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Zhaoyang Li
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
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Dong S, Li Z, Tang ZR, Zheng Y, Yang H, Zeng Q. Predictors of adverse events after percutaneous pedicle screws fixation in patients with single-segment thoracolumbar burst fractures. BMC Musculoskelet Disord 2022; 23:168. [PMID: 35193550 PMCID: PMC8864915 DOI: 10.1186/s12891-022-05122-1] [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] [Received: 11/09/2021] [Accepted: 02/16/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Percutaneous pedicle screw fixation (PPSF) is the primary approach for single-segment thoracolumbar burst fractures (TLBF). The healing angle at the thoracolumbar junction is one of the most significant criteria for evaluating the efficacy of PPSF. Therefore, the purpose of this study was to analyze the predictors associated with the poor postoperative alignment of the thoracolumbar region from routine variables using a support vector machine (SVM) model. METHODS We retrospectively analyzed patients with TLBF operated at our academic institute between March 1, 2014 and December 31, 2019. Stepwise logistic regression analysis was performed to assess potential statistical differences between all clinical and radiological variables and the adverse events. Based on multivariate logistic results, a series of independent risk factors were fed into the SVM model. Meanwhile, the feature importance of radiologic outcome for each parameter was explored. The predictive performance of the SVM classifier was evaluated using the area under the receiver operating characteristic curve (AUC), accuracy (ACC) and confusion matrices with 10-fold cross-validation, respectively. RESULTS In the recruited 150 TLBFs, unfavorable radiological outcomes were observed in 53 patients (35.33%). The relationship between osteoporosis (p = 0.036), preoperative Cobb angle (p = 0.001), immediate postoperative Cobb angle (p = 0.029), surgically corrected Cobb angle (p = 0.001), intervertebral disc injury (Score 2 p = 0.001, Score 3 p = 0.001), interpedicular distance (IPD) (p = 0.001), vertebral body compression rate (VBCR) (p = 0.010) and adverse events was confirmed by univariate regression. Thereafter, independent risk factors including preoperative Cobb angle, the disc status and IPD and independent protective factors surgical correction angle were identified by multivariable logistic regression. The established SVM classifier demonstrated favorable predictive performance with the best AUC = 0.93, average AUC = 0.88, and average ACC = 0.87. The variables associated with radiological outcomes, in order of correlation strength, were intervertebral disc injury (42%), surgically corrected Cobb angle (25%), preoperative Cobb angle (18%), and IPD (15%). The confusion matrix reveals the classification results of the discriminant analysis. CONCLUSIONS Critical radiographic indicators and surgical purposes were confirmed to be associated with an unfavorable radiographic outcome of TLBF. This SVM model demonstrated good predictive ability for endpoints in terms of adverse events in patients after PPSF surgery.
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Affiliation(s)
- Shengtao Dong
- Department of Spine Surgery, the Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Zongyuan Li
- Department of Orthopedics, Mianyang Central Hospital, Mianyang, 621000, China
| | - Zhi-Ri Tang
- School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Yuanyuan Zheng
- Department of Oncology, the Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Hua Yang
- Department of Otolaryngology, the Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Qiuming Zeng
- Department of Orthopedics, University-Town Hospital of Chongqing Medical University, Chongqing, 401331, China.
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Radiological features of traumatic vertebral endplate fracture: an analysis of 194 cases with 263 vertebral fractures. Chin Med J (Engl) 2021; 133:2696-2702. [PMID: 32649527 PMCID: PMC7647501 DOI: 10.1097/cm9.0000000000000919] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The importance of identifying osteoporotic vertebral endplate or/and cortex fracture (ECF), which primarily includes endplate fracture (EPF) and vertebral anterior cortex buckling, has been recognized. However, some old traumatic ECFs with healing process in the elderly may be mistaken as osteoporotic. This study analyzes the radiological features of traumatic EPF. METHODS This was a retrospective analysis of 194 spine trauma patients with 263 vertebral fractures (mean age: 42.11 ± 9.82 years, 118 males and 76 females). All patients had traumatic EPF identified by X-ray/CT/MRI. RESULTS The involved vertebra was mostly L1 (29.7%), followed by T12 and L2. Except EPFs involved both superior and inferior endplates (12.6%), only 1.9% involved inferior endplate alone, with the majority involved superior endplate. If each endplate was divided into five segments of equal lengths (from anterior to posterior: a1, a2, m, p2, p1), the most depressed point of superior EPFs was mostly at segment-a2 (approximately 45%), followed by segment-a1 (approximately 20%) or segment-m (approximately 20%), and very rarely at segment-p1. The upper 1/3 of anterior vertebral wall was more likely to fracture, followed by middle 1/3 of anterior wall. For posterior vertebral wall fracture, 68.5% broke the bony wall surrounding the basivertebral vain. 58.6%, 30.0%, and 11.4% of vertebral fractures had <1/5, 1/5-1/3, and >1/3 vertebral body height loss. As the extent of vertebral height loss increased, the chance of having both superior and inferior EPFs also increased; however, the chance of having inferior EPF alone did not increase. CONCLUSION Traumatic EPF features are characterized, which may help the differentiation of traumatic and osteoporotic EPFs.
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Risk factors of postoperative bone cement leakage on osteoporotic vertebral compression fracture: a retrospective study. J Orthop Surg Res 2021; 16:183. [PMID: 33691731 PMCID: PMC7945340 DOI: 10.1186/s13018-021-02337-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 03/04/2021] [Indexed: 12/02/2022] Open
Abstract
Purpose To investigate risk factors of bone cement leakage in percutaneous vertebroplasty(PVP)for osteoporotic vertebral compression fracture (OVCF). Methods A total of 236 patients (344 vertebrae) who underwent PVP between November 2016 and June 2020 were enrolled in the study. Clinical and radiological characteristics, including age, gender, course of disease, trauma, type of vertebral fracture, cortical continuity of vertebral body, intervertebral vacuum cleft (IVC), fracture severity, fracture level, basivertebral foramen, bone cement dispersion types, the cement injection volume, the type of cement leakage, puncture approach, and intrusion of the posterior wall, were considered as potential risk factors. Three types of leakage (type-B, type-C, and type-S) were defined and risk factors for each type were analyzed. Logistic analysis was used to study the relationship between each factor and the type of cement leakage. Results The incidences of the three types of leakage were 28.5%, 24.4%, and 34.3%. The multinomial logistic analysis revealed that the factors of type-B leakage were the shape of cement and basivertebral foramen. One significant factor related to type-C leakage was cortical disruption, and the factors of type-S leakage were bone cement dispersion types, basivertebral foramen, cleft, fracture severity, an intrusion of the posterior wall, and gender. Conclusion Different types of cement leakage have their own risk factors, and the analysis of risk factors of these might be helpful in reducing the rate of cement leakage. Supplementary Information The online version contains supplementary material available at 10.1186/s13018-021-02337-1.
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Tzika M, Paraskevas GK, Piagkou M, Papatolios AK, Natsis K. Basivertebral foramina of true vertebrae: morphometry, topography and clinical considerations. Surg Radiol Anat 2021; 43:889-907. [PMID: 33598754 DOI: 10.1007/s00276-021-02690-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 01/18/2021] [Indexed: 12/15/2022]
Abstract
PURPOSE Basivertebral foramina (BVF) are openings of the posterior wall of vertebral body (VB) that lead to basivertebral canals (BVC), where homonymous neurovascular bundle courses. BVF and BVC are implicated with spinal fractures, vertebral augmentation and basivertebral nerve radiofrequency ablation. Despite their essential clinical impact, knowledge of BVF precise anatomy is scarce. The current study describes in detail the BVF typical morphological and topographical anatomy, morphometry and variants. METHODS In total, 1561 dried true vertebrae of 70 Greek spines of known gender and age were examined. BVF number, location, shape and size (in foramina > 1 mm), BVF distance from VB rims and pedicles, as well as VB morphometry (diameters, heights and distance between pedicles) were studied. Ten spines were re-examined by computed tomography and BVC depth and shape were recorded. Correlations and differences were statistically analyzed. RESULTS C1 lack BVF (3.4%). One BVF was found in 45.1%, two in 36.9%, three in 3.8% and four BVF in 0.6%. Multiple small (< 1 mm) foramina were observed in 10.1%. Asymmetry was detected in 12.3%. C2 and T10-L1 presented typical pattern, whereas C3 and T2 had the greatest variability. BVF were significantly closer to the upper rim in C2 and T10-L4 and to the lower rim in C7-T4, T6-T8 and L5. The mean BVC depth was 12-21.8% of the VB anteroposterior diameter. CONCLUSION BVF number, shape, size and topography are described, in detail, per vertebral level. The provided morphological classification and the created cumulative BVF topographic graphs should assist in clinical practice and surgery.
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Affiliation(s)
- Maria Tzika
- Department of Anatomy and Surgical Anatomy, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, P.O. Box 300, 54124, Thessaloniki, Greece.
| | - George K Paraskevas
- Department of Anatomy and Surgical Anatomy, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, P.O. Box 300, 54124, Thessaloniki, Greece
| | - Maria Piagkou
- Department of Anatomy, Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Apostolos K Papatolios
- Department of Anatomy and Surgical Anatomy, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, P.O. Box 300, 54124, Thessaloniki, Greece
| | - Konstantinos Natsis
- Department of Anatomy and Surgical Anatomy, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, P.O. Box 300, 54124, Thessaloniki, Greece
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