Spinal interbody spacers

Non-articulating semi-rigid spinal implants include upper and lower rigid endplates that define at least one aligned pair of rigid male and female members. The respective female member having an interior facing cavity and the respective male member facing toward the female cavity. At least one elastic member resides in each female member cavity. The device can include an optional housing with at least one bore for each of the at least one aligned pairs of female and male members. The housing bore is sized and configured to snugly encase each respective aligned pair of endplate male and female members while leaving an upper outer surface of the upper endplate and a lower outer surface of the lower endplate exposed.