TLIF or Transforaminal Lumbar Interbody Fusion is a lumbar spine technique to fuse both the front of the spine and the back of the spine with one small incision in the back of the spine. It is used for various problems such as instability, degenerative spondylolysthesis, isthmic spondylolysthesis, discogenic pain, multiple recurrent disc herniations and foraminal collapse. This video-Explanation of Lumbar Fusion using TLIF and BMP-describes the technique using a model and the actual implant devices to lead to a full understanding of how this is done.