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The innovative viscoelastic CP ESP cervical disk prosthesis with six degrees of freedom: biomechanical concepts development program and preliminary clinical experience

机译:具有六个自由度的创新粘弹性CP ESP颈椎盘假体:生物力学概念开发计划和初步临床经验

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摘要

The viscoelastic cervical disk prosthesis ESP is an innovative one-piece deformable but cohesive interbody spacer. It is an evolution of the LP ESP lumbar disk implanted since 2006. CP ESP provides six full degrees of freedom about the three axes including shock absorbtion. The prosthesis geometry allows limited rotation and translation with resistance to motion (elastic return property) aimed at avoiding overload of the posterior facets. The rotation center can vary freely during motion. The concept of the ESP prosthesis is fundamentally different from that of the devices currently used in the cervical spine. The originality of the concept of the ESP® prosthesis led to innovative and intense testing to validate the adhesion of the viscoelastic component of the disk on the titanium endplates and to assess the mechanical properties of the PCU cushion. The preliminary clinical and radiological results with 2-year follow-up are encouraging for pain, function and kinematic behavior (range of motion and evolution of the mean centers of rotation). In this series, we did not observe device-related specific complications, misalignment, instability or ossifications. Additional studies and longer patient follow-up are needed to assess long-term reliability of this innovative implant.
机译:粘弹性颈椎间盘假体ESP是一种创新的一体式可变形但具有粘性的椎体间垫片。这是自2006年以来植入的LP ESP腰椎盘的演变。CPESP围绕三个轴提供六个完整的自由度,包括减震。假体的几何形状允许有限的旋转和平移,并具有运动阻力(弹性返回特性),旨在避免后小平面的过载。旋转中心在运动过程中可以自由变化。 ESP假体的概念与目前颈椎中使用的设备的概念根本不同。 ESP ®假体的概念的独创性导致了创新而激烈的测试,以验证椎间盘粘弹性成分在钛终板上的附着力并评估PCU缓冲垫的机械性能。经过两年的随访,初步的临床和放射学结果令人鼓舞,可减轻疼痛,功能和运动学行为(运动范围和平均旋转中心的演变)。在本系列中,我们没有观察到与设备相关的特定并发症,未对准,不稳定或骨化。需要更多的研究和更长的患者随访来评估这种创新植入物的长期可靠性。

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