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In order to explore the effects of different internal fixation systems on the biomechanical characteristics of the spine after orthopedic idiopathic scoliosis, a theoretical basis for the improvement of the internal fixation system was provided from the perspective of biomechanics. Based on reverse engineering, topology optimization and finite element modeling techniques, the finite element model of idiopathic scoliosis was established by taking actual cases as examples. The personalized fusion device was designed. Two kinds of internal fixation systems were established, namely full fixation and interval fixation. To simulate idiopathic scoliosis surgery and compare the biomechanical differences between spine and internal fixation system under different physiological conditions. The results show that the average stress of cortical bone and cancellous bone is increased by 17.19% and 12.37%, respectively, compared with that of interlocking nails. The maximum equivalent stress of fibrous annulus matrix and nucleus pulposus is increased by 1.78% and 1.1%, respectively, compared with that of full nailing. The maximum equivalent stress of pedicle screws is 11.64% higher than that of interlocking screws. The average stress of interbody fusion is increased by 6.15% compared with that of interbody fusion. In conclusion, compared with the interspaced nailing scheme, the total nailing scheme is better in vertebrae safety, but the risk of screw slip and screw loss is higher. Compared with the total nailing scheme, the interstice nailing scheme has better spinal fusion effect and effectively alleviates stress occlusion, but the incidence of bone hyperplasia is increased.
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, authorsList=富荣昌, 张怀悦, 王召耀)}, authors=[Author(id=1225467165902553381, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=2781642414@qq.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1225467166066131246, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, authorId=1225467165902553381, language=EN, stringName=Rong-chang FU, firstName=Rong-chang, middleName=null, lastName=FU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=College of Intelligent Manufacturing Modern Industry, Xinjiang University, Urumqi 830017, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1225467166242292029, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, authorId=1225467165902553381, language=CN, stringName=富荣昌, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=新疆大学智能制造现代产业学院, 乌鲁木齐 830017, bio={"content":"
富荣昌(1965—),男,锡伯族,新疆伊犁人,硕士,副教授。研究方向:骨的生物力学及血流动力学。E-mail:2781642414@qq.com。
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富荣昌(1965—),男,锡伯族,新疆伊犁人,硕士,副教授。研究方向:骨的生物力学及血流动力学。E-mail:2781642414@qq.com。
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International Orthopaedics,
2008,
32(5): 649-655., articleTitle=Anterior cervical locking plate-related complications: prevention and treatment recommendations, refAbstract=null)], funds=[Fund(id=1225467179773117381, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, awardId=32260235, language=CN, fundingSource=国家自然科学基金(32260235), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1225467165730586907, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, xref=null, ext=[AuthorCompanyExt(id=1225467165738975517, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, companyId=1225467165730586907, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=College of Intelligent Manufacturing Modern Industry, Xinjiang University, Urumqi 830017, China), AuthorCompanyExt(id=1225467165759947042, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, companyId=1225467165730586907, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=新疆大学智能制造现代产业学院, 乌鲁木齐 830017)])], figs=[ArticleFig(id=1225467171959128628, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Fig.1, caption=
IS surgery modelling process, figureFileSmall=zhrwJy3VAH3LEj3SwLDXEQ==, figureFileBig=+exow98jD9oiz+/N9vXFqw==, tableContent=null), ArticleFig(id=1225467173573935686, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=图1, caption=
IS手术建模过程, figureFileSmall=zhrwJy3VAH3LEj3SwLDXEQ==, figureFileBig=+exow98jD9oiz+/N9vXFqw==, tableContent=null), ArticleFig(id=1225467174140166751, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Fig.2, caption=
Axial displacement curve of vertebral body under different uniform pressure, figureFileSmall=alex9aUXSkInY/O/PxDH4Q==, figureFileBig=XRi9+wOmoUpYZt1zUCdkew==, tableContent=null), ArticleFig(id=1225467174345687664, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=图2, caption=
不同均布压力下椎体轴向位移, figureFileSmall=alex9aUXSkInY/O/PxDH4Q==, figureFileBig=XRi9+wOmoUpYZt1zUCdkew==, tableContent=null), ArticleFig(id=1225467174567985794, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Fig.3, caption=
Finite element calculation results for pedicle screws, figureFileSmall=DURLk2XsKh+Cl24Aa66vGw==, figureFileBig=8Rn0ZpMLeVu2wPMm7Wi15Q==, tableContent=null), ArticleFig(id=1225467174844809877, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=图3, caption=
椎弓根螺钉有限元计算结果, figureFileSmall=DURLk2XsKh+Cl24Aa66vGw==, figureFileBig=8Rn0ZpMLeVu2wPMm7Wi15Q==, tableContent=null), ArticleFig(id=1225467175037747874, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Fig.4, caption=
Vertebral stress results, figureFileSmall=KZnn5d0i3oHh//gD5z6fRw==, figureFileBig=iA0lv7VPI6gv3Hdr2PNnXA==, tableContent=null), ArticleFig(id=1225467175213908659, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=图4, caption=
椎体应力结果, figureFileSmall=KZnn5d0i3oHh//gD5z6fRw==, figureFileBig=iA0lv7VPI6gv3Hdr2PNnXA==, tableContent=null), ArticleFig(id=1225467175373292228, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Fig.5, caption=
Intervertebral disc stress results, figureFileSmall=x6CAFWWmaOQ7ASJoKHAGmQ==, figureFileBig=MWuiqpEiZo3YXu9Pz0ZixQ==, tableContent=null), ArticleFig(id=1225467175624950492, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=图5, caption=
椎间盘应力结果, figureFileSmall=x6CAFWWmaOQ7ASJoKHAGmQ==, figureFileBig=MWuiqpEiZo3YXu9Pz0ZixQ==, tableContent=null), ArticleFig(id=1225467175792722662, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Fig.6, caption=
Stress results for nail bars and fusion devices, figureFileSmall=qh7uV1oYlqHJO+4ZVt5vHg==, figureFileBig=EP+m66MpN5HS72amc8e+Sw==, tableContent=null), ArticleFig(id=1225467175985660662, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=图6, caption=
钉棒、融合器应力结果, figureFileSmall=qh7uV1oYlqHJO+4ZVt5vHg==, figureFileBig=EP+m66MpN5HS72amc8e+Sw==, tableContent=null), ArticleFig(id=1225467176195375873, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Table 1, caption=
Unit selection and material parameters for each part of the lumbar spine model
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型结构 | 单元类型 | 弹性模量/ MPa | 泊松比 | 横截面积/ mm2 |
| 皮质骨 | S4R/S3 | 12 000 | 0.3 | — |
| 松质骨 | C3D8R/C3D4 | 100 | 0.2 | — |
| 终板 | S4R | 24 | 0.4 | — |
| 纤维环基质 | C3D10 | 4.2 | 0.3 | — |
| 髓核 | C3D10 | 1 | 0.49 | — |
| 关节软骨 | C3D8R | 20 | 0.3 | — |
| 前纵韧带(ALL) | T3D2 | 7.8 | 0.3 | 63.7 |
| 后纵韧带(PLL) | T3D2 | 10 | 0.3 | 20 |
| 黄韧带(LF) | T3D2 | 15 | 0.3 | 40 |
| 棘间韧带(ISL) | T3D2 | 10 | 0.3 | 40 |
| 棘上韧带(SSL) | T3D2 | 8 | 0.3 | 30 |
| 横突韧带(TL) | T3D2 | 10 | 0.3 | 1.8 |
| 关节囊韧带(CL) | T3D2 | 20 | 0.3 | 30 |
| 钛合金 | C3D8R | 110 000 | 0.32 | |
), ArticleFig(id=1225467176409285389, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=表1, caption=
腰椎模型各部分单元选择与材料参数
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| 模型结构 | 单元类型 | 弹性模量/ MPa | 泊松比 | 横截面积/ mm2 |
| 皮质骨 | S4R/S3 | 12 000 | 0.3 | — |
| 松质骨 | C3D8R/C3D4 | 100 | 0.2 | — |
| 终板 | S4R | 24 | 0.4 | — |
| 纤维环基质 | C3D10 | 4.2 | 0.3 | — |
| 髓核 | C3D10 | 1 | 0.49 | — |
| 关节软骨 | C3D8R | 20 | 0.3 | — |
| 前纵韧带(ALL) | T3D2 | 7.8 | 0.3 | 63.7 |
| 后纵韧带(PLL) | T3D2 | 10 | 0.3 | 20 |
| 黄韧带(LF) | T3D2 | 15 | 0.3 | 40 |
| 棘间韧带(ISL) | T3D2 | 10 | 0.3 | 40 |
| 棘上韧带(SSL) | T3D2 | 8 | 0.3 | 30 |
| 横突韧带(TL) | T3D2 | 10 | 0.3 | 1.8 |
| 关节囊韧带(CL) | T3D2 | 20 | 0.3 | 30 |
| 钛合金 | C3D8R | 110 000 | 0.32 | |
), ArticleFig(id=1225467177843737385, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Table 2, caption=
Stress of each structure under different grid sizes
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| 结构 | 应力/MPa | 0.7 mm与 0.9 mm相差 百分比/% | 0.7 mm 与1.3 mm 相差百分比/% |
| 0.7 mm | 0.9 mm | 1.3 mm |
| 皮质骨 | 82.57 | 78.59 | 76.14 | 4.8 | 7.8 |
| 小关节 | 111.8 | 116.6 | 112.7 | 4.3 | 0.81 |
| 松质骨 | 26.97 | 26.42 | 26.05 | 2.03 | 3.4 |
| 基质 | 7.829 | 7.987 | 7.903 | 2.01 | 0.95 |
| 髓核 | 0.526 | 0.529 | 0.530 | 0.57 | 0.76 |
| 终板 | 7.265 | 7.269 | 7.271 | 0.055 | 0.083 |
), ArticleFig(id=1225467178162504511, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=表2, caption=
不同网格尺寸下各结构的应力
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| 结构 | 应力/MPa | 0.7 mm与 0.9 mm相差 百分比/% | 0.7 mm 与1.3 mm 相差百分比/% |
| 0.7 mm | 0.9 mm | 1.3 mm |
| 皮质骨 | 82.57 | 78.59 | 76.14 | 4.8 | 7.8 |
| 小关节 | 111.8 | 116.6 | 112.7 | 4.3 | 0.81 |
| 松质骨 | 26.97 | 26.42 | 26.05 | 2.03 | 3.4 |
| 基质 | 7.829 | 7.987 | 7.903 | 2.01 | 0.95 |
| 髓核 | 0.526 | 0.529 | 0.530 | 0.57 | 0.76 |
| 终板 | 7.265 | 7.269 | 7.271 | 0.055 | 0.083 |
), ArticleFig(id=1225467178531603301, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Table 3, caption=
Comparison of average stresses in various parts of the spine
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 全置钉平均 应力/MPa | 间隔置钉平均 应力/MPa | (Δδ/δmin)/% |
| 皮质骨 | 75.93 | 64.79 | 17.19 | |
| 松质骨 | 6.45 | 5.74 | 12.37 | |
| 纤维环基质 | 2.30 | 2.26 | 1.77 | |
| 髓核 | 0.34 | 0.41 | 20.59 | |
| 椎弓根螺钉 | 255.69 | 249.33 | 2.55 | |
| 融合器 | 1.90 | 1.79 | 6.15 | |
), ArticleFig(id=1225467178674209655, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=表3, caption=
脊柱各部分平均应力对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 全置钉平均 应力/MPa | 间隔置钉平均 应力/MPa | (Δδ/δmin)/% |
| 皮质骨 | 75.93 | 64.79 | 17.19 | |
| 松质骨 | 6.45 | 5.74 | 12.37 | |
| 纤维环基质 | 2.30 | 2.26 | 1.77 | |
| 髓核 | 0.34 | 0.41 | 20.59 | |
| 椎弓根螺钉 | 255.69 | 249.33 | 2.55 | |
| 融合器 | 1.90 | 1.79 | 6.15 | |
), ArticleFig(id=1225467178930062224, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=EN, label=Table 4, caption=
Comparison of maximum equivalent stresses in various parts of the spine
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 全置钉最大 应力/MPa | 间隔置钉最大 应力/MPa | (Δδ/δmin)/% |
| 皮质骨 | 238.70 | 229.80 | 3.87 | |
| 松质骨 | 20.01 | 19.38 | 3.25 | |
| 纤维环基质 | 15.44 | 15.61 | 1.10 | |
| 髓核 | 2.22 | 2.28 | 2.70 | |
| 椎弓根螺钉 | 525.60 | 478.80 | 9.77 | |
| 融合器 | 23.04 | 21.89 | 5.25 | |
), ArticleFig(id=1225467179232052133, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156983787235136346, language=CN, label=表4, caption=
脊柱各部分最大等效应力对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 全置钉最大 应力/MPa | 间隔置钉最大 应力/MPa | (Δδ/δmin)/% |
| 皮质骨 | 238.70 | 229.80 | 3.87 | |
| 松质骨 | 20.01 | 19.38 | 3.25 | |
| 纤维环基质 | 15.44 | 15.61 | 1.10 | |
| 髓核 | 2.22 | 2.28 | 2.70 | |
| 椎弓根螺钉 | 525.60 | 478.80 | 9.77 | |
| 融合器 | 23.04 | 21.89 | 5.25 | |
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