Fig. 5From: Topping-off surgery vs posterior lumbar interbody fusion for degenerative lumbar disease: a finite element analysisAssembly model a, d, g 3D stereogram view of normal lumbar, Coflex model, and PLIF model. b, e, h 3D perspective view of normal lumbar, Coflex model, and PLIF model. c, f, i 3D Grid diagram view of normal lumbar, Coflex model, and PLIF modelBack to article page