Pedicle-screw-rod fixation system is very popular surgical remedy for degenerative disc disease. It is important to observe load vs. spinal motion characteristic for better understanding of clinical problems and treatment of spinal instability associated with low-back pain. Ti6Al4V pedicle-screw-rod fixation system highly restricted the ROM of the spine, which is improved by using UHMWPE and PEEK, having lower stiffness. The foramen height did not vary significantly for any implant materials. In terms of ROM and maximum stress, PEEK rod may be considered for a better implant design to get better ROM and thus mobility.
While pedicle screws provide anchor points on the spinal segment, metal rods are used to connect them together.
Once the bone graft has grown and fuses to the surrounding bones, the screws and rods are not considered medically necessary. However, they can remain in place for most patients with an eliminated need for invasive removal surgery. In some patients, the pedicle screws may begin to cause discomfort and should be removed in these patients.
While initial treatment with screws was associated with many risks, current treatments are considered safe for most patients with certain spinal conditions. Most patients experience significant or total improvement in pain symptoms after surgery, and are able to stop using pain medication on a regular basis. Your doctor will discuss any potential risks of this procedure with you before your surgery.