The disclosed subject matter relates a spinal interbody device (1500) comprising a front surface (1502)； a rear surface (1508) substantially opposed to the front surface； an upper surface (1506) connected to the front and rear surfaces； a lower surface (1504) opposed to the upper surface and connected to each of the front and rear surfaces； at least one opening (1720) formed at the front surface, the opening extending through the interbody device； at least one projection (1602), preferably including a bulb and a columnar structure extending from the bulb； and a drive mechanism (1705) disposed adjacent the at least one opening and configured to move the at least one projection so that the projection moves through at least one of the upper surface or the lower surface.
