A method to insert an artificial disc in the spine of a patient including: sequentially inserting at least two components of an artificial disk in an vertebral interbody space; assembling the components within the vertebral interbody space to form an artificial disc, and using the assembled artificial disc as a disc in the vertebral interbody space. The interbody space is between two adjacent vertebra. The components of the artificial disc are sequentially surgically inserted posteriorly into the patient or sequentially inserted with a lateral surgical approach, and are surgically inserted without resection of facet joints in the spine.