An interbody spacer system for insertion between a first vertebra and a second vertebra according to the principles of the present disclosure include an interbody spacer (102) including an anterior wall (106), a posterior wall (112), and a pair of sidewalls (108, 110) connecting the anterior wall (106) and the posterior wall (112) to form a cavity (114) having open top and bottom, the anterior wall (106) including a first entry aperture (124a), a first sidewall (108) of the pair of sidewalls (108, 110) including a first exit aperture (128a) proximate to the anterior wall (106)； a first helical path (122a) extending from the first entry aperture (124a) to the first exit aperture (128a) through a portion of the anterior wall (106) and through a portion of the first sidewall (108)； and a first helical blade (104a) configured to enter the first entry aperture (124a) and exit the first exit aperture (128a) through the first helical path (122a), and extend in a first helical direction across the top of the cavity to a second sidewall (110) of the pair of sidewalls (108, 110) proximate to the posterior wall (112).
