For almost twenty years, PEEK (polyetheretherketone) has achieved a successful clinical history in load-sharing spinal applications, particularly in lumbar fusions due to their many advantages as elastic modulus close to bone, high biocompatibility and biostability, excellent resistance to compressive loading, and radiolucency.
But recently, it has been discussed the difficulties of PEEK to elicit a strong osteogenic (bone-forming) response and complaint that those cages primaril act only as a spacer. As a result, many companies have developed a new generation of implants that while providing primary implant stability, at the same time promotes natural BMP production. So, the controversy is there in the market and over the next years definitively we will have many discussions about this issue.
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About TLIF
A transforaminal lumbar interbody fusion (TLIF) is performed to remove a portion of a disc that is the source of back or leg pain. Bone graft is used to fuse the spinal vertebrae after the disc is removed. TLIF provides fusion of the front and back of the lumbar spine. The front portion of the spine, called the anterior column, is stabilized by the interbody spacer and bone graft. The back portion, or posterior column, is locked in place with pedicle screws, rods and additional bone graft, alongside the backs of the vertebra.