“…For these reasons, nerve guidance channels based on polymeric materials sutured in-between the two nerve stumps have been developed and are currently used to assist in directing axons from the proximal to the distal nerve stump [19,20]. At present, the use of such guidance channels is limited to short nerve defects, up to 3 cm [21]. For large nerve gaps, exogenous supports are needed to enable the regenerating fibres to cross the gap [18].…”