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Discocerv® - Cervical Disc Prosthesis - Alphatec Spine

'Motion preservation in the spine - A healthcare economics perspective, eg is it less of a burden on the healthcare systems to not have reimbursement for artificial cervical discs?' The International Society for the Advancement of Spine Surgery, Barcelona March 2012.

Cervical Disc Prosthesis | RD Medical Inc. Prodorth

This study presents a finite element model of the C4-C7 segment in healthy conditions and after implantation of a disc prosthesis at a single level, in order to investigate of the influence of disc arthroplasty on the biomechanics of the cervical spine. A nonlinear finite element model of the C4-C7 segment in intact conditions was developed and run in flexion and extension. A detailed model of the Bryan disc prosthesis, including contacts between the different components of the device, was built and positioned at C5-C6. The calculated segmental motion resulted preserved after disc arthroplasty, with respect to the model of the intact spine, in both flexion and extension. A general preservation of the forces transmitted through the facet joints was obtained; a minor force increase at the implanted level was detected. The analysis of the instantaneous centers of rotation (ICR) in flexion-extension showed the preservation of a physiological kinematics. The mechanical behaviour showed an asymmetry between flexion and extension, probably due to the removal of the anterior longitudinal ligament and the anterior part of the annulus fibrosus, and the preservation of the posterior structures. In general, the disc prosthesis showed to be able to reproduce a nearly physiological motion. However, other important mechanical aspects, such as the possible micromotion at the bone-implant interface and the possible degenerative conditions of the spine, need to be evaluated before drawing a conclusion about total disc arthroplasty from an engineering point of view.

Cervical spine disc prosthesis ..

KW - Cervical disc prosthesis

AB - This study presents a finite element model of the C4-C7 segment in healthy conditions and after implantation of a disc prosthesis at a single level, in order to investigate of the influence of disc arthroplasty on the biomechanics of the cervical spine. A nonlinear finite element model of the C4-C7 segment in intact conditions was developed and run in flexion and extension. A detailed model of the Bryan disc prosthesis, including contacts between the different components of the device, was built and positioned at C5-C6. The calculated segmental motion resulted preserved after disc arthroplasty, with respect to the model of the intact spine, in both flexion and extension. A general preservation of the forces transmitted through the facet joints was obtained; a minor force increase at the implanted level was detected. The analysis of the instantaneous centers of rotation (ICR) in flexion-extension showed the preservation of a physiological kinematics. The mechanical behaviour showed an asymmetry between flexion and extension, probably due to the removal of the anterior longitudinal ligament and the anterior part of the annulus fibrosus, and the preservation of the posterior structures. In general, the disc prosthesis showed to be able to reproduce a nearly physiological motion. However, other important mechanical aspects, such as the possible micromotion at the bone-implant interface and the possible degenerative conditions of the spine, need to be evaluated before drawing a conclusion about total disc arthroplasty from an engineering point of view.

N2 - This study presents a finite element model of the C4-C7 segment in healthy conditions and after implantation of a disc prosthesis at a single level, in order to investigate of the influence of disc arthroplasty on the biomechanics of the cervical spine. A nonlinear finite element model of the C4-C7 segment in intact conditions was developed and run in flexion and extension. A detailed model of the Bryan disc prosthesis, including contacts between the different components of the device, was built and positioned at C5-C6. The calculated segmental motion resulted preserved after disc arthroplasty, with respect to the model of the intact spine, in both flexion and extension. A general preservation of the forces transmitted through the facet joints was obtained; a minor force increase at the implanted level was detected. The analysis of the instantaneous centers of rotation (ICR) in flexion-extension showed the preservation of a physiological kinematics. The mechanical behaviour showed an asymmetry between flexion and extension, probably due to the removal of the anterior longitudinal ligament and the anterior part of the annulus fibrosus, and the preservation of the posterior structures. In general, the disc prosthesis showed to be able to reproduce a nearly physiological motion. However, other important mechanical aspects, such as the possible micromotion at the bone-implant interface and the possible degenerative conditions of the spine, need to be evaluated before drawing a conclusion about total disc arthroplasty from an engineering point of view.

The model utilised was a Mobi-C cervical disc

'A self stabilizing sliding core disc arthroplasty prosthesis.' Spine Society of Australia scientific meeting, Brisbane April 2009.

The DISCOVER Artificial Cervical Intervertabral Disc arthroplasty from Depuy is an unconstrained cervical disc prosthesis. The device is indicated for symptomatic cervical disc disease, with the aim of improving range of neck movement and reducing neck pain. The device comprises titanium alloy endplates coated with porous titanium spray and hydroxyapatite, and a central ultra high molecular weight polyethylene articulating core. It is available in a range of sizes and thicknesses.

'Cost effectiveness of single level cervical disc arthroplasty' ' North American Spine Society 26th Annual General Meeting, Chicago November 2011.

This is an illustrative case of a well-positioned cervical disc prosthesis (total disc replacement)
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Baguera cervical disc prosthesis | SpringerLink

Kostuik innovation award 2011 - International Society for the advancement of spine surgery, Las Vegas April 2011 for paper 'Cost effectiveness of Cervical disc replacement'

We first used the disc prosthesis on the cervical segment, ..

'A multicenter, prospective, randomized study of an artificial cevical disc versus fusion for primary cervical disc surgery.' Cervical Spine Research Society, Miami USA, Dec 2002

cervical disc prosthesis operation - YouTube

Dr McCombe is an . He has a special interest in disc replacement surgery in the lumbar (low back) spine and cervical (neck) spine as well as in disorders of spinal posture (sagittal imbalance). He is also interested in cases of deformity causing nerve compression such as spondylolisthesis and degenerative adult scoliosis. He inserted the first cervical disc replacement in Australia in 2000. He has an interest in spinal implant design and, in conjunction with a neurosurgical colleague, has designed two implant systems used for posterior lumbar interbody fusion (R90 and Capstone Contol). He conducts clinical research into patient outcomes and theoretical mathematical analysis of spinal balance.

What's Involved in Anterior Cervical Discectomy and Fusion?

'Cost effectiveness of single level cervical disc arthroplasty' International Society for the Advancement of Spine Surgery meeting , Las Vegas April 2011

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