Static Versus Expandable Polyether Ether Ketone (PEEK) Interbody Cages: A Comparison of One-Year Clinical and Radiographic Outcomes for One-Level Transforaminal Lumbar Interbody Fusion

José A. Canseco, Brian A. Karamian, Stephen DiMaria, Parthik D. Patel, Srikanth N. Divi, Michael Chang, Tyler Timmons, Lovy Grewal, Haydn Hallman, Joseph K. Lee, I. David Kaye, Barrett I. Woods, Mark F. Kurd, D. Greg Anderson, Jeffrey A. Rihn, Alan S. Hilibrand, Christopher K. Kepler, Alexander R. Vaccaro, Gregory D. Schroeder