Medical devices and kits for dynamically stabilizing or preserving motion in a spine and limiting adjacent, non-adjacent, or isolated segment degeneration of the spine while providing a controlled, determinable range of motion at the treated site, as well as methods for surgical use of the system.本發明係用於在脊椎中動態地穩定或保存運動,並限制該脊椎之相鄰、不相鄰、或獨立的節退化,而在受治療位置提供受控制、可決定之運動範圍的醫學裝置及套件,以及針對該系統之外科使用的方法。