1.What is an artificial cervical disc? An artificial cervical disc is a special device that can simulate a normal human cervical disc. When people suffer from cervical spondylosis or acute cervical disc herniation and other reasons that require surgery, the diseased disc will be removed and an artificial disc will be implanted in the place of the original disc to replace the original disc and exercise its function. 2.What is the role of the artificial cervical disc? The artificial cervical disc simulates the function of a normal human cervical disc. It is similar to a shock-absorbing cushion that absorbs vibrations from the ground, and is also able to rebuild and maintain the height of the intervertebral space that has been lost due to pathology, etc. The most important function of the artificial disc is to maintain the movement of the intervertebral joints and to protect the adjacent segments from secondary degeneration. The traditional method of cervical spine surgery is to remove the diseased disc and then place bone graft between the upper and lower vertebrae to fill the space left by the disc removal and to promote complete fusion of the upper and lower vertebrae together for the purpose of radical treatment. However, cervical fusion often leads to premature degeneration called secondary degeneration due to the increased stress on the adjacent segmental discs. The artificial cervical disc protects the discs of the adjacent segments from premature degeneration because it maintains the movement of the intervertebral space of the segment. 3.What is the difference between an artificial cervical disc and a lumbar disc? The principle of artificial cervical disc and lumbar disc is the same. However, since the main function of the lumbar spine is to bear the load of body weight, the artificial disc of the lumbar spine must be designed to first meet the need to bear the load of gravity and also to have a certain range of mobility. The design of artificial cervical discs requires almost the same degree of mobility as normal cervical discs because the main function of the cervical spine is to meet the full range of head movement. In addition, the size of the artificial cervical disc is much smaller than the lumbar disc.