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ICR in human cadaveric specimens : an essential parameter to consider in a new lumbar disc prosthesis design

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ICR in human cadaveric specimens : an essential parameter to consider in a new lumbar disc prosthesis design

dc.contributor.author	Vanaclocha-Saiz, Amparo
dc.contributor.author	Atienza Vicente, Carlos M.
dc.contributor.author	Vanaclocha Vanaclocha, Vicente
dc.contributor.author	Belloch, Vicente
dc.contributor.author	Santabarbara, Juan Manuel
dc.contributor.author	Jordá Gómez, P.
dc.contributor.author	Vanaclocha, Leyre
dc.date.accessioned	2023-02-14T17:14:00Z
dc.date.available	2023-02-14T17:14:00Z
dc.date.issued	2020
dc.identifier.citation	Vanaclocha-Saiz, Amparo Atienza Vicente, Carlos M. Vanaclocha Vanaclocha, Vicente Belloch, Vicente Santabarbara, Juan Manuel Jordá Gómez, P. Vanaclocha, Leyre 2020 ICR in human cadaveric specimens : an essential parameter to consider in a new lumbar disc prosthesis design The spine journal eCollection 202 2 100016 100024
dc.identifier.uri	https://hdl.handle.net/10550/85444
dc.description.abstract	Study design: Biomechanical study in cadaveric specimens. Background: The commercially available lumbar disc prostheses do not reproduce the intact disc's Instantaneous centre of Rotation (ICR), thus inducing an overload on adjacent anatomical structures, promoting secondary degeneration. Aim: To examine biomechanical testing of cadaveric lumbar spine specimens in order to evaluate and define the ICR of intact lumbar discs. Material and Methods: Twelve cold preserved fresh human cadaveric lumbosacral spine specimens were subjected to computerized tomography (CT), magnetic resonance imaging (MRI) and biomechanical testing. Kinematic studies were performed to analyse range of movements in order to determine ICR. Results: Flexoextension and lateral bending tests showed a positive linear correlation between the angle rotated and the displacement of the ICR in different axes. Discussion: ICR has not been taken into account in any of the available literature regarding lumbar disc prosthesis. Considering our results, neither the actual ball-and-socket nor the withdrawn elastomeric nucleus models fit the biomechanics of the lumbar spine, which could at least in part explain the failure rates of the implants in terms of postoperative failed back syndrome (low back pain). It is reasonable to consider then that an implant should also adapt the equations of the movement of the intact ICR of the joint to the post-surgical ICR. Conclusions: This is the first cadaveric study on the ICR of the human lumbar spine. We have shown that it is feasible to calculate and consider this parameter in order to design future prosthesis with improved clinical and biomechanical characteristics.
dc.relation.ispartof	The spine journal, 2020, vol. eCollection 202, num. 2, p. 100016-100024
dc.subject	Lumbàlgia
dc.subject	Ossos Malalties
dc.title	ICR in human cadaveric specimens : an essential parameter to consider in a new lumbar disc prosthesis design
dc.type	journal article	es_ES
dc.date.updated	2023-02-14T17:14:00Z
dc.identifier.doi	10.1016/j.xnsj.2020.100016
dc.identifier.idgrec	156889
dc.rights.accessRights	open access	es_ES