Intersomatic fusion is a very popular treatment for spinal diseases associated with intervertebral disc degeneration. The effects of three different hybrid stabilization systems on both range of motion and intradiscal pressure were investigated, as there is no consensus in the literature about the efficiency of these systems. Finite element simulations were designed to predict the variations of range of motion and intradiscal pressure from intact to implanted situations. After hybrid stabilization system implantation, L4-L5 level did not lose its motion completely, while L5-S1 had no mobility as a consequence of disc removal and fusion process. BalanC hybrid stabilization system represented higher mobility at the index level, reduced intradiscal pressure of adjacent level, but caused to increment in range of motion by 20% under axial rotation. Higher tendency by 93% to the failure was also detected under axial rotation. Dynesys hybrid stabilization system represented more restricted motion than BalanC, and negligible effects to the adjacent level. B-DYN hybrid stabilization system was the most rigid one among all three systems. It reduced intradiscal pressure and range of motion at the adjacent level except from motion under axial rotation being increased by 13%. Fracture risk of B-DYN and Dynesys Transition Optima components was low when compared with BalanC. Mobility of the adjacent level around axial direction should be taken into account in case of implantation with BalanC and B-DYN systems, as well as on the development of new designs. Having these findings in mind, it is clear that hybrid systems need to be further tested, both clinically and numerically, before being considered for common use.

椎间融合术是一种非常流行的治疗与椎间盘退变相关的脊柱疾病的方法。研究了三种不同的混合稳定系统对运动范围和椎间盘内压力的影响，因为文献中没有就这些系统的效率达成共识。有限元模拟旨在预测从完整到植入情况的运动范围和椎间盘内压力的变化。混合稳定系统植入后，L4-L5水平没有完全失去运动，而L5-S1由于椎间盘去除和融合过程而没有活动性。BalanC 混合稳定系统在指标层面表现出更高的活动性，降低了相邻层面的椎间盘内压力，但在轴向旋转下导致运动范围增加 20%。在轴向旋转下也检测到了 93% 的更高的故障趋势。Dynesys 混合稳定系统表现出比 BalanC 更受限制的运动，并且对相邻级别的影响可以忽略不计。B-DYN 混合稳定系统是所有三个系统中最刚性的一个。它降低了椎间盘内压力和相邻水平的运动范围，但轴向旋转下的运动增加了 13%。与 BalanC 相比，B-DYN 和 Dynesys Transition Optima 组件的断裂风险较低。在使用 BalanC 和 B-DYN 系统进行植入以及开发新设计时，应考虑相邻层围绕轴向的移动性。考虑到这些发现，很明显混合系统需要在临床和数值上进一步测试，