Intervertebral prosthetic systems, devices, and associated methods

An intervertebral prosthetic device comprising:

• an upper component for engaging an upper vertebra, the upper component having an elongated central portion extending along a first longitudinal axis, the elongated central portion bounded on a first end by a first arm extending substantially perpendicular to the first longitudinal axis and bounded on an opposing second end by a second arm extending substantially perpendicular to the first longitudinal axis, wherein the first arm is configured to engage a first lateral sidewall of the upper vertebra, the first arm including an outer surface opposite a bone engaging surface, the outer surface and the bone engaging surface having an opening extending therethrough, the opening configured to receive a fastener for securing the first arm to the first sidewall of the upper vertebra, the second arm is configured to engage a second lateral sidewall of the upper vertebra, the second arm having an outer surface opposite a bone engaging surface, the second arm outer surface having no opening and the second arm bone engaging surface including a surface treatment having a plurality of bone-engaging projections for encouraging engagement of the second arm with the second sidewall of the upper vertebra, and the elongated central portion is sized to extend across an endplate of the upper vertebra between the first lateral sidewall and the second lateral sidewall of the upper vertebra, and further wherein a width of the upper component is substantially constant such that the central portion, the first arm, and the second arm each have a width substantially equal;
• an lower component for engaging an lower vertebra, the lower component having an elongated central portion extending along a second longitudinal axis, the elongated central portion bounded on a first end by a first arm extending substantially perpendicular to the second longitudinal axis and bounded on an opposing second end by a second arm extending substantially perpendicular to the second longitudinal axis, wherein the first arm is configured to engage a first lateral sidewall of the lower vertebra, the first arm having an outer surface opposite a bone engaging surface, the outer surface and the bone engaging surface having an opening configured to receive a fastener for securing the first arm to the first sidewall of the lower vertebra, the second arm is configured to engage a second lateral sidewall of the lower vertebra, the second arm having an outer surface opposite a bone engaging surface, the second arm outer surface having no opening and the second arm bone engaging surface including a surface treatment having a plurality of bone-engaging projections for encouraging engagement of the second arm with the second sidewall of the lower vertebra, and the elongated central portion is sized to extend across an endplate of the lower vertebra between the first lateral sidewall and the second lateral sidewall of the lower vertebra, and further wherein a width of the lower component is substantially constant such that the central portion, the first arm, and the second arm each have a width substantially equal;
• and
• a central component for positioning between the upper component and the lower component within an intervertebral space between the upper and lower vertebrae.