Back pain for ten years, the face of surgery in the dilemma: working in the northwest of the old summer in the early fifties this year, it is a good time for children to become successful, enjoy the happiness of family. But who knows, the old back pain has been following him for a whole decade. In the beginning, it was just lumbar discomfort, lumbar pain is more obvious after bending, lifting heavy objects and other activities, bed rest for a while lumbar pain is lighter, when the old summer did not care too much, and did not go to the hospital for treatment. Later, when the back pain was lighter and heavier, it developed to the point that turning over in bed also hurt, and getting up from bed and moving down to the ground hurt even more. In the past year, the old summer days can be really bad, walking less than 1 mile during the day to feel the right leg soreness, pain and even leg numbness, weakness, squatting down to rest some good, but did not go far leg numbness and pain, sleep at night is more from time to time woke up by back pain. Originally the old summer often accompanied his partner to go out to see the scenery, but now have to stay at home, all day sullen, sad face. Old Xia’s children are looking at him, pain in the heart, took him to several large hospitals for medical treatment, the diagnosis is clear, are lumbar instability with lumbar spinal stenosis, and the doctor also told him to do surgery, that is, in the lumbar arch to play screw internal fixation and add bone graft fusion. But the old Xia heard the surgery program, afraid to accept the surgery. Despite his family’s advice, Xia refused to undergo the surgery. He felt that the cold metal punched into the lumbar spine was not only risky, but also thought that the metal in the lumbar spine had turned him into a “robot”. The Wallis Dynamic Stabilization System brought light: The children had no choice but to ask around and found our outpatient clinic for treatment. We inquired in detail about his condition, then performed a physical examination, imaging and electrophysiological examination, and diagnosed him with fourth and fifth lumbar instability combined with lumbar spinal stenosis. In view of his condition, we recommended that he be treated with the interspinous Wallis Dynamic Stabilization System, which eliminated the pain of pedicle screw fixation and was less invasive, shorter, and less risky than the device, and did not require removal of the device again after surgery. The old man had no more worries in his mind this time and agreed to the surgery readily. The operation went very smoothly and took only an hour or so to finish. After the operation, he felt that his back and leg pain had basically disappeared, and his whole body was relaxed and his mental outlook was new. After two weeks of bed rest, Xia was able to wear a lumbar brace and move around in bed, but he had to avoid bending over and lifting heavy objects. After one month of review, the Wallis device was fixed reliably and the doctor agreed to remove the waist brace. Three months later, Xia’s waist range of motion has slightly increased and the stiffness in his back has disappeared. He is now smiling and told us that he and his partner went on a trip to Jiuzhaigou a few days ago and their quality of life has taken a new step forward. Deficiencies of lumbar spine internal fixation fusion: Until today, most lumbar instability is basically treated by internal fixation fusion of the unstable segment, and multiple fusion methods can be chosen, such as the aforementioned posterior lumbar arch nail internal fixation with bone graft fusion is a common method for treating simple segmental lumbar instability. However, with the continuous research on the physiological function of the spine, it has been gradually recognized that the impact of spinal fusion on the normal function of the spine is mainly manifested by the loss of motor function of the fused segment, the change in stress transmission and the load carried by the adjacent intervertebral space, which can cause degeneration of the adjacent segment; in addition, there is the possibility of non-fusion of the implant, pseudo-joint formation, and even broken nails and rods. For those who use autologous iliac bone graft for spinal fusion, complications such as pain in the bone extraction area, lateral femoral cutaneous nerve injury, hematoma, and infection are also problems that must be faced. Advantages of the Wallis Dynamic Stabilization System: With this in mind, the French scholar Senegas designed the first generation of interspinous dynamic fixation device consisting of a titanium internal fixator and two polyester cords in 1986, which achieved good clinical results. Subsequently, in 2001, Senegas produced a second generation fixation made of polyether ether ketone (PEEK) instead of titanium, called the “Wallis Dynamic Stabilization System”. The new fixation device is more flexible (PEEK is 30 times more flexible than titanium) and allows for laminar decompression of the stenotic segment while the device is in place. The device is placed between the spinous processes of the destabilized segment, preserving a certain range of spinal motion, changing the loading pattern of the moving segment, and limiting abnormal activity of the segment, thus effectively relieving symptoms such as lumbar pain and leg numbness and pain caused by the destabilization of the lumbar segment. The device is suitable for: 1, lumbar instability with or without lumbar spinal stenosis; 2, lumbar disc herniation reissue secondary surgery; 3, large disc herniation disc surgery will cause significant loss of intervertebral height; 4, previous lumbar fusion surgery patients with postoperative adjacent segment disc degeneration. However, the device is not suitable for patients with lumbar spondylolisthesis and severe disc degeneration.