{"title":"连续与间隔椎弓根螺钉配置在脊柱侧凸矫正中的生物力学效应的有限元分析及双几何螺钉设计的优化。","authors":"Chunshan He, Shixin Dou, Xiaoying Ma, Zhenhua Hou","doi":"10.1080/10255842.2025.2530638","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>To optimize scoliosis correction strategies by comparing continuous and interval pedicle screw configurations and proposing a dual-geometry screw design.</p><p><strong>Methods: </strong>A patient-specific T11-L5 scoliotic spine model was reconstructed <i>via</i> finite element analysis (FEA). Continuous and interval screw placements were evaluated for biomechanical performance. A novel dual-geometry screw (tapered-cylindrical transition) was developed.</p><p><strong>Results: </strong>Continuous configurations achieved a 43.5% reduction in displacement (1.33 mm vs. 2.36 mm) and a 29.7% decrease in screw stress (444.08 MPa vs. 631.35 MPa). The dual-geometry screw lowered drilling stress (16.5%, <i>p</i> < 0.05) and displacement heterogeneity (22.4%).</p><p><strong>Conclusion: </strong>Continuous screws enhance stability through synergistic load transfer, while dual-geometry screws mitigate interfacial damage. This provides biomechanical criteria for clinical scoliosis correction.</p>","PeriodicalId":50640,"journal":{"name":"Computer Methods in Biomechanics and Biomedical Engineering","volume":" ","pages":"1-15"},"PeriodicalIF":1.7000,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Finite element analysis of biomechanical effects of continuous versus interval pedicle screw configurations in scoliosis correction and optimization of dual-geometry screw design.\",\"authors\":\"Chunshan He, Shixin Dou, Xiaoying Ma, Zhenhua Hou\",\"doi\":\"10.1080/10255842.2025.2530638\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>To optimize scoliosis correction strategies by comparing continuous and interval pedicle screw configurations and proposing a dual-geometry screw design.</p><p><strong>Methods: </strong>A patient-specific T11-L5 scoliotic spine model was reconstructed <i>via</i> finite element analysis (FEA). Continuous and interval screw placements were evaluated for biomechanical performance. A novel dual-geometry screw (tapered-cylindrical transition) was developed.</p><p><strong>Results: </strong>Continuous configurations achieved a 43.5% reduction in displacement (1.33 mm vs. 2.36 mm) and a 29.7% decrease in screw stress (444.08 MPa vs. 631.35 MPa). The dual-geometry screw lowered drilling stress (16.5%, <i>p</i> < 0.05) and displacement heterogeneity (22.4%).</p><p><strong>Conclusion: </strong>Continuous screws enhance stability through synergistic load transfer, while dual-geometry screws mitigate interfacial damage. This provides biomechanical criteria for clinical scoliosis correction.</p>\",\"PeriodicalId\":50640,\"journal\":{\"name\":\"Computer Methods in Biomechanics and Biomedical Engineering\",\"volume\":\" \",\"pages\":\"1-15\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2025-07-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Computer Methods in Biomechanics and Biomedical Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1080/10255842.2025.2530638\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computer Methods in Biomechanics and Biomedical Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1080/10255842.2025.2530638","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
引用次数: 0
摘要
目的：通过比较连续椎弓根螺钉和间隔椎弓根螺钉的配置，提出双几何形状的螺钉设计，优化脊柱侧凸矫正策略。方法：通过有限元分析（FEA）重建患者T11-L5脊柱侧凸模型。连续和间隔放置螺钉评估生物力学性能。提出了一种新型的双几何螺杆（锥形-圆柱过渡）结构。结果：连续配置实现了43.5%的位移减少（1.33 mm vs. 2.36 mm）和29.7%的螺钉应力减少（444.08 MPa vs. 631.35 MPa）。结论：连续螺钉通过协同载荷传递增强了稳定性，而双几何螺钉减轻了界面损伤。这为临床脊柱侧凸矫正提供了生物力学标准。
Finite element analysis of biomechanical effects of continuous versus interval pedicle screw configurations in scoliosis correction and optimization of dual-geometry screw design.
Purpose: To optimize scoliosis correction strategies by comparing continuous and interval pedicle screw configurations and proposing a dual-geometry screw design.
Methods: A patient-specific T11-L5 scoliotic spine model was reconstructed via finite element analysis (FEA). Continuous and interval screw placements were evaluated for biomechanical performance. A novel dual-geometry screw (tapered-cylindrical transition) was developed.
Results: Continuous configurations achieved a 43.5% reduction in displacement (1.33 mm vs. 2.36 mm) and a 29.7% decrease in screw stress (444.08 MPa vs. 631.35 MPa). The dual-geometry screw lowered drilling stress (16.5%, p < 0.05) and displacement heterogeneity (22.4%).
Conclusion: Continuous screws enhance stability through synergistic load transfer, while dual-geometry screws mitigate interfacial damage. This provides biomechanical criteria for clinical scoliosis correction.
期刊介绍：
The primary aims of Computer Methods in Biomechanics and Biomedical Engineering are to provide a means of communicating the advances being made in the areas of biomechanics and biomedical engineering and to stimulate interest in the continually emerging computer based technologies which are being applied in these multidisciplinary subjects. Computer Methods in Biomechanics and Biomedical Engineering will also provide a focus for the importance of integrating the disciplines of engineering with medical technology and clinical expertise. Such integration will have a major impact on health care in the future.
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