Pre-packed corpectomy device to improve fusion

A corpectomy system comprising:

• a corpectomy device comprising:
• an outer component including a first endplate and a first tubular structure extending from the first endplate, the first tubular structure including a first end proximate the first endplate and an opposite second end that is open, the first tubular structure including a window extending through at least a portion of a side of the first tubular structure proximate the first end, the first tubular structure including a seat proximate the first end, transverse to the first tubular structure, and above the first endplate in communication with the window, the first tubular structure including a pair of opposing guide walls that intersect the seat and extend from the window into the first tubular structure;
• an inner component including a second endplate and a second tubular structure extending from the second endplate, the second tubular structure disposed in the first tubular structure through the opposite second end so that the inner component is in a first telescoping configuration with respect to the outer component, the second tubular structure defining a first planar terminal surface;
• a riser including a third tubular structure that defines a second planar terminal surface, the riser configured to be received through the window into the seat of the first tubular structure so that the second planar terminal surface engages at least a portion of the first planar terminal surface enabling the riser to support the inner component in a second telescoping configuration with respect to the outer component, wherein the guide walls of the first tubular structure are configured to guide the riser into the seat;
• and
• an inserter tool configured to distract the inner component with respect to the outer component and to allow introduction of the riser into the seat of the outer component.