Tremendous advancements have been made in the field of spinal Biomechanics and reconstructive surgeries during the past 30 years leading to the concept of disc replacement by artificial devices from the concept of spinal fusion. These devices not only maintain the near normal natural motion of the replaced disc but also protect the normal discs from abnormal stresses which is a common problem after fusion surgery.

At the same time since these devices do not require any graft harvesting from the patient ,problems related to graft surgery like donor site pain, infection, local herniation of organs are avoided. At present we can safely replace one or two level discs of both lower back as well as that of neck region in selected cases of disc degeneration who have failed all other non-operative treatment modalities for at least six months without involvement of posterior joints clinically and radiologically.

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