Fig. 3
From: Biomechanical design considerations of a 3D-printed tibiotalocalcaneal nail for ankle joint fusion
Four TTC nail designs: (a) TTC 1: Baseline solid design (5 mm diameter), TTC 2: Core-lattice design (2.5 mm core, 25 mm lattice region), TTC 3: Core-lattice with longitudinal ribs and TTC 4: Core-lattice with longitudinal and transverse ribs; (b) Detailed specifications of the diamond array lattice structure: A 2.5 mm diameter central core with a 25 mm long lattice region featuring diamond-shaped patterns (70% porosity, 0.3 mm pillar diameter, 1.2 mm unit cells, 650 μm pore sizes). The lattice structure extends 2.5 mm from the central core, with additional 1 mm thick reinforcing ribs in TTC 3 and TTC 4 designs