The introduction of ultrasonic bone knife in our department, applied to complex spine surgery, is precise and safe in operation, and can remove the stenosis and difficult angles of the operation area of the proliferation of bone, greatly improving the safety and precision of the operation, with clear surgical efficacy and satisfactory recovery of patients. Spine surgery has a richer nerve, vascular, hoof tissue, surgical operation is undoubtedly the most challenging surgery in orthopedic surgery, precision and safety are the basic requirements of spine surgery, in recent years, the field of spine surgery put forward the concept of precision surgery, the concept of precision surgery should contain at least three aspects of the implication: technological progress has brought great innovation to the medical field, with magnetic resonance, myoelectric and With the widespread use of magnetic resonance, electromyography and neuropotential, imaging and local closure in spine surgery, preoperative diagnosis of spinal diseases in the traditional sense is no longer a problem, and postoperative rehabilitation is also easy to achieve, while precise and safe surgical operations are becoming the pursuit of the majority of spine surgeons around the world, the majority of medical engineering technology workers are also working around the clock on research and development, in order to better protect human health, a large number of digital, intelligent A large number of digital and intelligent medical devices have emerged, including navigation systems, robotic systems, high-speed grinding drills have emerged, but the previous technology and equipment often vary in performance due to different manipulators or individual patient differences, the overall performance is poor, control stability and safety are not guaranteed. The ultrasonic bone knife is based on the need for precision and safety in surgery, and is an innovative technology that uses piezoelectric ultrasonic frequency micrometer cutting knives to perform bone cutting and bone trimming procedures. Based on the above characteristics of ultrasonic bone knife technology, it can achieve the least possible cutting of the soft tissue around the bone and effectively protect the blood supply to the bone. Horton et al. reported that it can not only cut bone tissue effectively compared with the traditional bone saw, but also histologically demonstrated that the healing time of bone tissue cut by ultrasonic bone knife was significantly reduced. Thoracic spine tumor removal laminectomy This procedure has low bleeding, clean tumor removal, simple, safe, and efficient laminectomy in the management of intravertebral tumors, greatly reduces operative time, and is easy and efficient to perform laminectomy. Lumbar decompression and internal fixation Posterior decompression of the lumbar spine is mainly used for trauma or lesion of the lumbar vertebral body, disc herniation, spinal stenosis caused by ossification of the ligamentum flavum, foraminal stenosis, etc. During the operation, the ultrasonic bone knife is used to perform resection of the vertebral body, fusion of the vertebral body, laminectomy, etc., in order to decompress the compressed spinal cord, etc. The ultrasonic knife poses little threat to the peripheral nerve plexus and vascular plexus, and the cold cut directly to the spinal cord epidural ensures no thermal damage to the peripheral nerve tissue. This procedure is referred to as a “two-in-one” procedure because the normal anatomy of the area is destroyed due to the formation of bone scabs after the second surgery (this phenomenon also exists in patients with spinal deformities). This procedure is extremely safe with the ultrasonic bone knife, which uses a planer tip and a cutter tip to handle the procedure, which involves the planing, cutting, and cutting of bone scabs, etc. It is very significant. Ultrasonic bone knife surgery operator labor intensity, high stability, neat bone cutting edge, applied in spine surgery, including in the thoracic spine, lumbar spine and cervical spine surgery is also widely used, small trauma, fast recovery, greatly reducing the cutting of soft tissue around the bone, in the narrow operating area and difficult angle operating area can be easily cut, the application of ultrasonic bone knife is a major breakthrough for orthopedics. The trauma department has become familiar with this technology and has frequently applied it in clinical surgery with excellent results.