Flexible interbody cage

A dynamically morphing prismatic structure for use in an intervertebral bone fusion implantable device, the structure comprising:

• (a) an interlocking modular configuration with structural parts extending between a distal end and a proximal end of the device, the interlocking modular configuration comprising:
• at least one stowed structural element operatively interconnected with the interlocking modular configuration, the stowed structural element comprising:
• (i) at least one block having an uneven structural geometry adapted to promote osseointegration of the device wherein at least one inner, outer, or side wall of the at least one block is coated or sprayed with a friction-reducing coating adapted to permit frictionless movement between the block and adjacent structures of the interlocking modular configuration;
• and
• (ii) wherein the stowed structural element being operable to transition between:
• a stowed compact position for insertion between an upper vertebra and a lower vertebra;
• and
• an unstowed expanded position causing an increase in both surface area and volume with the device reconfiguring spatially,
• (b) an engagement element positioned at the distal end of the device;
• (c) a removable instrument operatively coupled to the proximal end of the interlocking modular configuration, the removable instrument being adapted to advance the engagement element, wherein the engagement element facilitates:
• (i) increasing an interstitial space between the upper vertebra and the lower vertebra;
• and
• (ii) delivering the device in a compact first form factor defined by a first surface area;
• and a first volume within the interstitial space;
• (d) wherein:
• (i) structural parts of the interlocking modular configuration being positioned adjacent to the at least one block of the stowed structural element, such that the friction-reducing coating is applied on one or more of an inner, outer, or side wall of a block adjacent to structural elements of the interlocking modular configuration in the compact first form factor;
• and
• (ii) the spatial reconfiguration of the device by operation of the removable instrument, causing the interlocking modular configuration and the stowed structural element to transition from the compact first form factor to one of increased or expanded second form factor, wherein:
• (A) the second form factor is characterized by an increased second volume and increased second surface area relative to the first form factor;
• and
• (B) the transition is facilitated by reduced sliding friction during displacement of the at least one block of the stowed structural element relative to the structural parts of the interlocking modular configuration.