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Nucleus disc replacement : designs and material selection FEA analysis

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Nucleus disc replacement : designs and material selection FEA analysis

dc.contributor.author	Vanaclocha-Saiz, Amparo
dc.contributor.author	Vanaclocha Vanaclocha, Vicente
dc.contributor.author	Atienza Vicente, Carlos M.
dc.contributor.author	Clavel, Pablo
dc.contributor.author	Jordá Gómez, P.
dc.contributor.author	Barrios, Carlos
dc.contributor.author	Sáiz-Sapena, Nieves
dc.contributor.author	Vanaclocha, Leyre
dc.date.accessioned	2023-03-23T15:42:27Z
dc.date.available	2023-03-23T15:42:27Z
dc.date.issued	2022
dc.identifier.citation	Vanaclocha-Saiz, Amparo Vanaclocha Vanaclocha, Vicente Atienza Vicente, Carlos M. Clavel, Pablo Jordá Gómez, P. Barrios, Carlos Sáiz-Sapena, Nieves Vanaclocha, Leyre 2022 Nucleus disc replacement : designs and material selection FEA analysis Advances In Materials Science And Engineering
dc.identifier.uri	https://hdl.handle.net/10550/85894
dc.description.abstract	Study design. Material selection, implant design and 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: 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 the 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 the loads uniformly, and tolerated the 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, due to its elasticity implanting it through the average annulotomy required to perform a lumbar microdiscectomy should be possible.
dc.relation.ispartof	Advances In Materials Science And Engineering, 2022
dc.subject	Medicina Investigació
dc.title	Nucleus disc replacement : designs and material selection FEA analysis
dc.type	journal article	es_ES
dc.date.updated	2023-03-23T15:42:27Z
dc.identifier.doi	10.1155/2022/5040747
dc.identifier.idgrec	156888
dc.rights.accessRights	open access	es_ES