The utility model belongs to the technical field of
medical instruments, and particularly relates to a 3D printing expandable interbody fusion cage which comprises a fusion cage body, and the fusion cage body comprises a screw, a fixing pin, a transverse pin, a frame body, an upper base plate, a lower base plate and a supporting sliding block arranged between the upper base plate and the lower base plate. The distractable interbody fusion cage and intervertebral contact parts are manufactured by using a 3D printing technology, and three-dimensional porous structures similar to
cancellous bone structures are designed on the surfaces of the upper base plate and the lower base plate, so that the
fusion rate of the interbody fusion cage and the spine of a
human body can be increased; meanwhile, the interbody fusion cage is simple in structure and convenient to operate, is implanted into the interbody space of the
human body in a contracted state, is expanded in situ, can increase the contact area with an end plate and the
bone chip filling space, can recover the forward convex curvature, has high biomechanical stability, is suitable for various
lumbar degenerative diseases needing interbody fusion, and can be widely applied to the field of
lumbar interbody fusion. The
clinical treatment effect can be effectively improved.