ALTERA® is an articulating expandable TLIF spacer designed to maximize the potential for restoring lordosis and maintaining sagittal balance while minimizing the challenges of insertion. The spacer is inserted at a minimized height, articulated into anterior position, and expanded to optimize fit. ALTERA® offers 8° and 15° lordotic implants to potentially aid in sagittal balance. ALTERA® featured in Neurosurgical Focus in Journal of Neurosurgery Minimally Invasive Transforaminal Lumbar Interbody Fusion With Expandable Versus Static Interbody Devices: Radiographic Assessment of Sagittal Segmental and Pelvic Parameters Ammar H. Hawasli, MD, PhD, Jawad M. Khalifeh, BS, Ajay Chatrath, BS, Chester K. Yarbrough, MD, and Wilson Z. Ray, MD