Artificial Disc Replacement - Assessing Suitability

Careful selection of patients for artificial disc replacement is critical. There are several conditions that may prevent patients from receiving a disc replacement. These include spondylolisthesis (the slipping of one vertebral body across a lower one), osteoporosis, vertebral body fracture, allergy to the materials in the device, spinal tumor, spinal infection, morbid obesity, significant changes of the facet joints (joints in the back portion of the spine), pregnancy, chronic steroid use or autoimmune problems. Also, total disc replacements are designed to be implanted from an anterior approach (through the abdomen for lumbar). Patients may be excluded from receiving an artificial disc if they previously had abdominal surgery or if the condition of the blood vessels in front of the spine increases the risk of significant injury during this type of spinal surgery.

In addition to the potential complications associated with general anesthesia, the complications associated with artificial disc replacement may include breakage of the metal plate, dislocation of the implant, infection, nerve injury and injury to blood vessels and urological structures. To help minimize complications associated with the implant itself, proper selection of patients and size of implant is very important. Also, artificial implants may fail over time due to wear of the materials and loosening of the implants.


Recovery from artificial disc replacement and care afterwards are much like that for other anterior approaches to the spine. In some cases, recovery is faster than for a traditional fusion surgery. There is less pain from the procedure and fewer complications in general. Another potential advantage of disc replacement is a more rapid return to activities than occurs after fusion surgery. Fusion patients have limited activities during the time required for the bone graft to grow into a solid mass. Because one of the goals of artificial discs is motion, patients are encouraged to return to motion early, although at a gradual progression. The length and type of activity restrictions following surgery are also much less with disc replacement.

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Expert Author:

Dr Benedict Peng, Island Orthopaedic Consultants