title: [Biomechanical analysis of different ProDisc-C arthroplasty design parameters after implanted: a numerical sensitivity study based on finite element method].
abstract: This study was aimed to estimate the effect of different ProDisc-C arthroplasty designs after it was implanted to C5-C6 cervicalspine. Finite element (FE) model of intact C5-C6 segments including the vertebrae and disc was developed and validated. Ball-and-socket artificial disc prosthesis model (ProDisc-C, Synthes) was implanted into the validated FE model and the curvature of the ProDisc-C prosthesis was varied. All models were loaded with compressed force 74 N and the pure moment of 1.8 Nm along flexion-extension and bilateral bending and axial torsion separately. The results indicated that the variation in the curvature of ball and socket configuration would influence the range of motion in flexion/extension, while there were not apparently differences under other conditions of loads. The method increasing the curvature will solve the stress concentration of the polyethylene, but it will also bring adverse outcomes, such as facet joint force increasing and ligament tension increasing. Therefore, the design of artificial discs should be considered comprehensively to reserve the range of motion as well as to avoid the adverse problems, so as not to affect the long-term clinical results.
authors: Qiaohong
authors: Q
authors: Tang
authors: Zhongjun
authors: Z
authors: Mo
authors: Jie
authors: J
authors: Yao
authors: Qi
authors: Q
authors: Li
authors: Chenfei
authors: C
authors: Du
authors: Lizhen
authors: L
authors: Wang
authors: Yubo
authors: Y
authors: Fan
mesh_terms: D001178:Arthroplasty; D001696:Biomechanical Phenomena; D020342:Finite Element Analysis; D006801:Humans; D007403:Intervertebral Disc; D011312:Pressure; D019736:Prostheses and Implants; D016059:Range of Motion, Articular; D013131:Spine; D021801:Zygapophyseal Joint