Fig. 5

The size of pores on the sides of scaffolds was significantly affected by filament deposition strategy in the study of Ruiz-Cantu et al. For a traditional print path (a), the printer nozzle moves to the edge of the scaffold before moving to the start position of the next parallel filament. For the revised print path (b), the orientation of the end of filaments was changed by 45°. This prevented excessive polymer deposition at the sides of scaffolds, resulting in larger pores on the external scaffold side surface. Figure adapted with permission from the original article of Ruiz-Cantu et al. [8] (Copyright 2016 by IOP Publishing Ltd.)