The anatomical design of our MectaLIF Intervertebral Body Fusion Device matches the given biological conditions in each patient and pathology and meets the requirements of the treating surgeon. The PLIF procedure, popularized in the 1950s and 1960s by Cloward, who inserted iliac crest bone into the intervertebral disc space, lost popularity because of the complication rate and technical difficulties. In the 1980s spacers made of titanium or carbon fiber reinforced PEEK were designed to overcome these challenges. However, bone from the iliac crest can be adjusted to the patients anatomy, compared to metal spacers which are available in a predetermined design. These thoughts led us to the development of our MECTALIF Posterior and MectaLIF Oblique Intervertebral Body Fusion Device, whose anatomical design features offer distinctive benefits, including: