The influence of bearing material on the wear produced, application on the prodisc-C cervical prothesis - Département Mécanique Access content directly
Journal Articles UPB Scientific Bulletin, Series D: Mechanical Engineering Year : 2022

The influence of bearing material on the wear produced, application on the prodisc-C cervical prothesis

Abstract

Cervical disc prostheses are designed to replace the degenerated intervertebral disc and recover movement between the vertebrae. These prostheses are made of at least two elements with a ball and socket design; this allows movement between the elements. The articular surfaces wear out, the polyethylene cores deteriorate (failure of polyethylene), and produce wear debris. This study focused on the Prodisc-C cervical disc prosthesis model with the design ball and socket and three degrees of freedom (3 DOF). The aim is to clarify the difference between the two bearings materials, Metal-on-Polyethylene (MoP) and Metal-on-Poly-ether-ether-ketone (MoPEEK), in terms of contact and wear. We designed this prosthesis model in 3D using Solidworks design software. Then, we imported this model to the Ansys Workbench simulation software to do the numerical analysis. We have fixed the lower plate and a fixed compressive load of 150 N was first applied on the upper plate, Next, this compressive load was combined with a rotational displacement of 7.5° in flexion, 6° in lateral bending, and 4° in axial rotation on the upper plate. After the simulation, we found that the contact pressure for the bearing material MoP is 5.53 MPa and justified this value using the Hertzian theory P0 = 4.9 MPa. Then the contact pressure for the bearing material MoPEEK is 11.09 MPa, justified by the Hertzian theory P0 = 10.74 MPa. The clinical reference polyethylene-on-cobalt alloy (prosthesis with polyethylene core MoP) was 1.05mm3/million cycles, compared to 0.83 mm3/million cycles MoPEEK, a 20.95% discount has been won.
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Dates and versions

hal-03937501 , version 1 (13-01-2023)

Identifiers

  • HAL Id : hal-03937501 , version 1

Cite

Moussa Amadji, Hamza Benyahia. The influence of bearing material on the wear produced, application on the prodisc-C cervical prothesis. UPB Scientific Bulletin, Series D: Mechanical Engineering, 2022, 84 (4), pp.151 - 164. ⟨hal-03937501⟩
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