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Qiao N, Villemure I, Wang Z, Petit Y, Aubin CE. Optimization of S2-alar-iliac screw (S2AI) fixation in adult spine deformity using a comprehensive genetic algorithm and finite element model personalized to patient geometry and bone mechanical properties. Spine Deform 2024; 12:595-602. [PMID: 38451404 DOI: 10.1007/s43390-024-00833-y] [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: 11/16/2023] [Accepted: 01/20/2024] [Indexed: 03/08/2024]
Abstract
PURPOSE To optimize the biomechanical performance of S2AI screw fixation using a genetic algorithm (GA) and patient-specific finite element analysis integrating bone mechanical properties. METHODS Patient-specific pelvic finite element models (FEM), including one normal and one osteoporotic model, were created from bi-planar multi-energy X-rays (BMEXs). The genetic algorithm (GA) optimized screw parameters based on bone mass quality (BM method) while a comparative optimization method maximized the screw corridor radius (GEO method). Biomechanical performance was evaluated through simulations, comparing both methods using pullout and toggle tests. RESULTS The optimal screw trajectory using the BM method was more lateral and caudal with insertion angles ranging from 49° to 66° (sagittal plane) and 29° to 35° (transverse plane). In comparison, the GEO method had ranges of 44° to 54° and 24° to 30° respectively. Pullout forces (PF) using the BM method ranged from 5 to 18.4 kN, which were 2.4 times higher than the GEO method (2.1-7.7 kN). Toggle loading generated failure forces between 0.8 and 10.1 kN (BM method) and 0.9-2.9 kN (GEO method). The bone mass surrounding the screw representing the fitness score and PF of the osteoporotic case were correlated (R2 > 0.8). CONCLUSION Our study proposed a patient-specific FEM to optimize the S2AI screw size and trajectory using a robust BM approach with GA. This approach considers surgical constraints and consistently improves fixation performance.
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Affiliation(s)
- Ningxin Qiao
- Institute of Biomedical Engineering, Polytechnique Montréal, PO Box 6079, Downtown station, Montreal, QC H3C 3A7, Canada
- Sainte-Justine University Hospital Center, Montreal, Canada
| | - Isabelle Villemure
- Institute of Biomedical Engineering, Polytechnique Montréal, PO Box 6079, Downtown station, Montreal, QC H3C 3A7, Canada
- Sainte-Justine University Hospital Center, Montreal, Canada
| | - Zhi Wang
- Centre Hospitalier de l'Université de Montréal, Montreal, Canada
- Department of Surgery, Faculty of Medicine, Université de Montréal, Montreal, Canada
| | - Yvan Petit
- Department of Mechanical Engineering, Ecole de Technologie Supérieure, Montreal, Canada
| | - Carl-Eric Aubin
- Institute of Biomedical Engineering, Polytechnique Montréal, PO Box 6079, Downtown station, Montreal, QC H3C 3A7, Canada.
- Sainte-Justine University Hospital Center, Montreal, Canada.
- Department of Surgery, Faculty of Medicine, Université de Montréal, Montreal, Canada.
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Jiang W, Caruana DL, Dussik CM, Conway D, Latich I, Chapiro J, Lindskog DM, Friedlaender GE, Lee FY. Bone Mass Changes Following Percutaneous Radiofrequency Ablation, Osteoplasty, Reinforcement, and Internal Fixation of Periacetabular Osteolytic Metastases. J Clin Med 2023; 12:4613. [PMID: 37510728 PMCID: PMC10380351 DOI: 10.3390/jcm12144613] [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: 06/20/2023] [Revised: 07/08/2023] [Accepted: 07/09/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND The success of orthopedic interventions for periacetabular osteolytic metastases depends on the progression or regression of cancer-induced bone loss. PURPOSE To characterize relative bone mass changes following percutaneous radiofrequency ablation, osteoplasty, cement reinforcement, and internal screw fixation (AORIF). METHODS Of 70 patients who underwent AORIF at a single institution, 21 patients (22 periacetabular sites; average follow-up of 18.5 ± 12.3 months) had high-resolution pelvic bone CT scans, with at least one scan within 3 months following their operation (baseline) and a comparative scan at least 6 months post-operatively. In total, 73 CT scans were measured for bone mass changes using Hounsfield Units (HU). A region of interest was defined for the periacetabular area in the coronal, axial, and sagittal reformation planes for all CT scans. For 6-month and 1-year scans, the coronal and sagittal HU were combined to create a weight-bearing HU (wbHU). Three-dimensional volumetric analysis was performed on the baseline and longest available CT scans. Cohort survival was compared to predicted PathFx 3.0 survival. RESULTS HU increased from baseline post-operative (1.2 ± 1.1 months) to most recent follow-up (20.2 ± 12.1 months) on coronal (124.0 ± 112.3), axial (140.3 ± 153.0), and sagittal (151.9 ± 162.4), p < 0.05. Grayscale volumetric measurements increased by 173.4 ± 166.4 (p < 0.05). AORIF median survival was 27.7 months (6.0 months PathFx3.0 predicted; p < 0.05). At 12 months, patients with >10% increase in wbHU demonstrated superior median survival of 36.5 months (vs. 26.4 months, p < 0.05). CONCLUSION Percutaneous stabilization leads to improvements in bone mass and may allow for delays in extensive open reconstruction procedures.
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Affiliation(s)
- Will Jiang
- Department of Orthopaedics & Rehabilitation, Yale School of Medicine, 47 College Street, New Haven, CT 06510, USA
| | - Dennis L. Caruana
- Department of Orthopaedics & Rehabilitation, Yale School of Medicine, 47 College Street, New Haven, CT 06510, USA
| | - Christopher M. Dussik
- Department of Orthopaedics & Rehabilitation, Yale School of Medicine, 47 College Street, New Haven, CT 06510, USA
| | - Devin Conway
- Department of Orthopaedics & Rehabilitation, Yale School of Medicine, 47 College Street, New Haven, CT 06510, USA
| | - Igor Latich
- Department of Radiology and Biomedical Imaging, Yale Interventional Oncology, P.O. Box 208042, New Haven, CT 06520, USA
| | - Julius Chapiro
- Department of Radiology and Biomedical Imaging, Yale Interventional Oncology, P.O. Box 208042, New Haven, CT 06520, USA
| | - Dieter M. Lindskog
- Department of Orthopaedics & Rehabilitation, Yale School of Medicine, 47 College Street, New Haven, CT 06510, USA
| | - Gary E. Friedlaender
- Department of Orthopaedics & Rehabilitation, Yale School of Medicine, 47 College Street, New Haven, CT 06510, USA
| | - Francis Y. Lee
- Department of Orthopaedics & Rehabilitation, Yale School of Medicine, 47 College Street, New Haven, CT 06510, USA
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Dussik CM, Toombs C, Alder KD, Yu KE, Berson ER, Ibe IK, Li F, Lindskog DM, Friedlaender GE, Latich I, Lee FY. Percutaneous Ablation, Osteoplasty, Reinforcement, and Internal Fixation for Pain and Ambulatory Function in Periacetabular Osteolytic Malignancies. Radiology 2023; 307:e221401. [PMID: 36916888 DOI: 10.1148/radiol.221401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Background Osteolytic neoplasms to periacetabular bone frequently cause pain and fractures. Immediate recovery is integral to lifesaving ambulatory oncologic care and maintaining quality of life. Yet, open acetabular reconstructive surgeries are associated with numerous complications that delay cancer treatments. Purpose To determine the effectiveness for short- and long-term pain and ambulatory function following percutaneous ablation, osteoplasty, reinforcement, and internal fixation (AORIF) for periacetabular osteolytic neoplasm. Materials and Methods This retrospective observational study evaluated clinical data from 50 patients (mean age, 65 years ± 14 [SD]; 25 men, 25 women) with osteolytic periacetabular metastases or myeloma. The primary outcome of combined pain and ambulatory function index score (range, 1 [bedbound] through 10 [normal ambulation]) was assessed before and after AORIF at 2 weeks and then every 3 months up to 40 months (overall median follow-up, 11 months [IQR, 4-14 months]). Secondary outcomes included Eastern Cooperative Oncology Group (ECOG) score, infection, transfusion, 30-day readmission, mortality, and conversion hip arthroplasty. Serial radiographs and CT images were obtained to assess the hip joint integrity. The paired t test or Wilcoxon signed-rank test and Kaplan-Meier analysis were used to analyze data. Results Mean combined pain and ambulatory function index scores improved from 4.5 ± 2.4 to 7.8 ± 2.1 (P < .001) and median ECOG scores from 3 (IQR, 2-4) to 1 (IQR, 1-2) (P < .001) at the first 2 weeks after AORIF. Of 22 nonambulatory patients, 19 became ambulatory on their first post-AORIF visit. Pain and functional improvement were retained beyond 1 year, up to 40 months after AORIF in surviving patients. No hardware failures, surgical site infections, readmissions, or delays in care were identified following AORIF. Of 12 patients with protrusio acetabuli, one patient required a conversion hemiarthroplasty at 24 months. Conclusion The ablation, osteoplasty, reinforcement, and internal fixation, or AORIF, technique was effective for short- and long-term improvement of pain and ambulatory function in patients with periacetabular osteolytic neoplasm. © RSNA, 2023.
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Affiliation(s)
- Christopher M Dussik
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Courtney Toombs
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Kareme D Alder
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Kristin E Yu
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Elisa R Berson
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Izuchukwu K Ibe
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Fangyong Li
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Dieter M Lindskog
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Gary E Friedlaender
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Igor Latich
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
| | - Francis Y Lee
- From the Department of Orthopaedics and Rehabilitation (C.M.D., C.T., K.D.A., K.E.Y., I.K.I., D.M.L., G.E.F., F.Y.L.), Department of Radiology and Biomedical Imaging (E.R.B.), and Yale Center for Analytical Sciences (F.L., I.L.), Yale University School of Medicine, 47 College St, New Haven, CT 06520
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