Lumbar degenerative disc disease has currently become a chronic health problem because of the aging population in the whole world. Low back pain is a crucial finding of lumbar degenerative disc disease in the aging spine. It is known that rigid fixation (fusion) systems have been introduced as a gold standard surgery to treat degenerative lumbar disc disease up to now, whereas there are many side effects in the long term. The dynamic posterior stabilization technique (with hinge screw) offers load-sharing and load-bearing features. The system also preserves some motion but eliminates the risk of abnormal translational movement. Hence, protecting the motion of lower back systems, particularly posterior spinal dynamic instrumentation, has recently been an optional procedure for rigid fixation. Comparison of the components of dynamic devices shows that the mechanism of dynamism differs among systems. The dynamic rods were chosen as the first generation of the dynamic stabilization system. Moreover, the hinged head of the screws was chosen as the second generation of the dynamic stabilization system. The Cosmic screw, a hinged screw, was developed as a stable and nonrigid implant with hinged screws to maintain limited flexion and extension capability during stabilization, as well as the Saphinaz screw, a polyaxial dynamic screw utilized in this system according to the principles of the Cosmic screw. In this chapter, we mention lumbar posterior dynamic stabilization to treat degenerative disc disease on the basis of Cosmic and Saphinaz screws.