Nucleus Disc Replacement: Design and Material Selection FEA Analysis
Study Design. We selected the materials and implant design and performed Finite Element Analysis (FEA) studies. Background. Nucleus disc replacements, implanted since 1960, have undergone continuous evolution in materials and designs, but subsidence, extrusion, and in vivo degradation limit widespre...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/5040747 |
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| author | Amparo Vanaclocha Vicente Vanaclocha Carlos M. Atienza Pablo Clavel Pablo Jorda-Gomez Carlos Barrios Nieves Saiz-Sapena Leyre Vanaclocha |
| author_facet | Amparo Vanaclocha Vicente Vanaclocha Carlos M. Atienza Pablo Clavel Pablo Jorda-Gomez Carlos Barrios Nieves Saiz-Sapena Leyre Vanaclocha |
| author_sort | Amparo Vanaclocha |
| collection | DOAJ |
| description | Study Design. We selected the materials and implant design and performed Finite Element Analysis (FEA) studies. Background. Nucleus disc replacements, implanted since 1960, have undergone continuous evolution in materials and designs, but subsidence, extrusion, and in vivo degradation limit widespread use. Aim. The aim of this study is to create a new nucleus disc replacement that avoids the abovementioned drawbacks. Material and Methods. We created eighteen designs with varied materials and analyzed them with FEA in compression and shear tests in a lumbar spine model programmed in Ansys Parametric Design Language. Results. Bionate® 80A had the closest mechanical characteristics to the intact disc nucleus. Monobloc designs bore physiological stresses correctly but suffered significant deformations with permanent damage during surgical insertion through the annulus opening. In addition, sandwich designs were too rigid and had an unreliable curing process. Therefore, we chose an oval doughnut-like 5 mm wall monobloc Bionate® 80A nucleus replacement. It minimized implant stress in loading, distributed loads uniformly, and tolerated lateral compression during implantation. Conclusions. Out of the eighteen designs we analyzed with FEA, we found that the monobloc oval doughnut-like Bionate 80A nucleus replacement reproduced best the biomechanics of the natural disc nucleus and had the lowest subsidence risk as it transmits the load to the ring apophysis. Furthermore, implanting it through the annulotomy required to perform a lumbar microdiscectomy should be possible due to its elasticity. Furthermore, due to its elasticity implanting it through the average annulotomy required to perform a lumbar microdiscectomy should be possible. |
| format | Article |
| id | doaj-art-bf822f9c8b734207a079f3b2576a383c |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-bf822f9c8b734207a079f3b2576a383c2025-02-03T06:08:43ZengWileyAdvances in Materials Science and Engineering1687-84422022-01-01202210.1155/2022/5040747Nucleus Disc Replacement: Design and Material Selection FEA AnalysisAmparo Vanaclocha0Vicente Vanaclocha1Carlos M. Atienza2Pablo Clavel3Pablo Jorda-Gomez4Carlos Barrios5Nieves Saiz-Sapena6Leyre Vanaclocha7Escuela de DoctoradoUniversity of ValenciaInstituto de Biomecánica (IBV)Instituto ClavelHospital General Universitario de CastellónCatholic University of ValenciaHospital General Universitario de ValenciaMedius KlinikStudy Design. We selected the materials and implant design and performed Finite Element Analysis (FEA) studies. Background. Nucleus disc replacements, implanted since 1960, have undergone continuous evolution in materials and designs, but subsidence, extrusion, and in vivo degradation limit widespread use. Aim. The aim of this study is to create a new nucleus disc replacement that avoids the abovementioned drawbacks. Material and Methods. We created eighteen designs with varied materials and analyzed them with FEA in compression and shear tests in a lumbar spine model programmed in Ansys Parametric Design Language. Results. Bionate® 80A had the closest mechanical characteristics to the intact disc nucleus. Monobloc designs bore physiological stresses correctly but suffered significant deformations with permanent damage during surgical insertion through the annulus opening. In addition, sandwich designs were too rigid and had an unreliable curing process. Therefore, we chose an oval doughnut-like 5 mm wall monobloc Bionate® 80A nucleus replacement. It minimized implant stress in loading, distributed loads uniformly, and tolerated lateral compression during implantation. Conclusions. Out of the eighteen designs we analyzed with FEA, we found that the monobloc oval doughnut-like Bionate 80A nucleus replacement reproduced best the biomechanics of the natural disc nucleus and had the lowest subsidence risk as it transmits the load to the ring apophysis. Furthermore, implanting it through the annulotomy required to perform a lumbar microdiscectomy should be possible due to its elasticity. Furthermore, due to its elasticity implanting it through the average annulotomy required to perform a lumbar microdiscectomy should be possible.http://dx.doi.org/10.1155/2022/5040747 |
| spellingShingle | Amparo Vanaclocha Vicente Vanaclocha Carlos M. Atienza Pablo Clavel Pablo Jorda-Gomez Carlos Barrios Nieves Saiz-Sapena Leyre Vanaclocha Nucleus Disc Replacement: Design and Material Selection FEA Analysis Advances in Materials Science and Engineering |
| title | Nucleus Disc Replacement: Design and Material Selection FEA Analysis |
| title_full | Nucleus Disc Replacement: Design and Material Selection FEA Analysis |
| title_fullStr | Nucleus Disc Replacement: Design and Material Selection FEA Analysis |
| title_full_unstemmed | Nucleus Disc Replacement: Design and Material Selection FEA Analysis |
| title_short | Nucleus Disc Replacement: Design and Material Selection FEA Analysis |
| title_sort | nucleus disc replacement design and material selection fea analysis |
| url | http://dx.doi.org/10.1155/2022/5040747 |
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