In simple terms, fusion surgery mainly refers to the fusion of joints and spine after serious disorders of the joints and spine cannot be cured. The following are two examples: for example, in the case of lumbar spine slippage and lumbar spine instability, the patient will experience severe pain when moving, and the vertebrae can be fused to make the two vertebrae fuse together. In the case of joint surgery, such as osteoarthritis of the ankle joint or osteoarthrosis of the greater trochanter, osteonecrosis of the talus, the ankle joint is particularly painful and the patient cannot walk normally. If the patient cannot be cured by treatment, a fusion of the ankle joint can be performed to fuse the tibia and talus together. Through the fusion surgery, the patient can reduce the pain and solve the problem of not being able to live and work normally.