"The TEX Expandable Transforaminal Lumbar Interbody Fusion (TLIF) cage is an interbody fusion device that expands into a wedge-shape. The device is intended to provide structural stability in skeletally mature individuals following discectomy. The device is made available in different footprint options and can be expanded to theappropriate height and degree of lordosis. The device is manufactured from Ti-6Al-4VELI Titanium Alloy (ASTM F136). The TEX Expandable Transforaminal Lumbar Interbody Fusion (TLIF) cage is an interbody fusion device intended for use in patients with degenerative disc disease (DDD) at one or two contiguous levels of the lumbosacral spine (L1 – S1). DDD is defined as back pain of discogenic origin, with degeneration of the disc confirmed by history and radiographic studies. These patients may also have up to Grade I spondylolisthesis atthe involved level(s).The devices are indicated for use in skeletally mature patients that have undergone atleast six months of non-operative treatment. The device may also be used in patients with pseudarthrosis / non-union from previous unsuccessful fusion surgery. Two TEX Expandable TLIF devices should be used per treated level. The device is intended to be used with autograft and/or allogenic bone graft comprised of cancellous and/or corticocancellous bone graft and supplemental fixation."