Design and Analysis of a Novel Artificial Cervical Disc

Artificial cervical disc plays a major role in implant surgeries, where it may work as much as the anatomical cervical disc after the replacement surgery. Therefore, designing and analyzing an artificial cervical disc became the main focus of this study. The Finite Element (FE) method was used to develop the design of artificial cervical disc between the cervical vertebra C4-C5 and to provide accurate analysis by using ABAQUS® software to determine the artificial disc response under static and dynamic loadings. The artificial cervical disc material was chosen from advanced biomaterials such as Cobalt Chrome Molybdenum (CoCrMo) and Ultra High Molecule Weight of Polyethylene (UHMWPE). Stress-strain relation, force displacement and compression were investigated under axial quasi static loading. Furthermore, in order to examine the model Range of Motion (ROM) in (axial rotation, lateral bending, and flexion/extension) moment was applied in three different directions. Moreover, another key analysis was normal mode of vibration, where, steady state dynamic and tabular amplitude was applied to investigate the effect of car accident on the artificial disc. In view of results, the maximum stress deformation was at the outer upper layer of CoCrMo, the yield strength was recorded as 170 MPa, the plastic deformation started at strain of 0.0005. As well as the failure occurs at 0.004. Coupled with displacement force distribution, the maximum deformation was in Z-direction. The moment load results showed the ROM of 5.36° and 5.89° in Flexion/extension, 7𝑜����lateral bending, and 6.7 º axial rotations under 1000 Nmm. To enhance this work, results was validated by comparing with experimental and FE based data. Dynamic analysis showed that lower frequency may have more dangerous effect than higher frequency on ligaments. Nonetheless, maximum stress with 1.975e3 MPa at the upper layer of CoCrMo provided that tabular amplitude is applied. This work presented that the newly designed artificial disc is validation based on the comparison with previously published work.