Depending on the symptoms the patient experiences, different surgical procedures are used. In cases where pain is generated from the degenrated disc only, a spinal fusion may be recommended. There are many surgical options to accomplish fusion. The spine may be appoached anteriorly (Anterior Lumbar Interbody Fusion or ALIF), posteriorly (Posterior Lumbar Interbody Fusion or PLIF, or in a combined approach A posterolateral fusion with or without instrumentaion may also be selected.
Your surgeon will use his experience, knowledge, and judgement and decide whether metallic implants (instrumentation) should be used. Metalic implants are placed across the fusion area to minimize motion while the bones heal into a fusion mass. Types of bone grafts will also be discussed with the patient.
The theory behind the surgical of spinal fusion is to remove the disc that generates the pain and fuse that specific segment of the spine. Most patients will loose only minimal motion since the other normal vertebrae and discs surrounding the fusion will compensate for the loss of motions in the fused segment. In cases where the degenerative disc reduces the size of the spinal canal and places presure on the nerves, the spinal surgeon may choose to decompress the narrwoing canal. Lamina, bone spurs, protruding or herniating discs that are reducing the size of the spinal canal and compressing the spinal caord and nerve root are removed.
After decompression of the canal, more space will be available for the neural tissues. Depending on the amount of bone removed necessary to decompress the neural tissues, that spine segment may be judged to be at risk for development of deformity. If the spinal surgeon predicts that you may be at risk for instabillity, he or she will choose to place bone graft at the sides of the bony spine to fuse that segmnet and prevent instability.
The purpose of this surgery is to relieve the pain and symptoms associated with the narrowing of the spinal canal that has resulted from the degeneration of the intervertebral disc and the surrounding structures of the spinal column. Lamina, bone spurs, protruding or herniating discs that are reducing the size of the spinal canal and compressing the spinal cord and nerve root are removed.