Fig. 4
From: Biomechanical design considerations of a 3D-printed tibiotalocalcaneal nail for ankle joint fusion
(a) Four TTC nail designs (TTC1-4) manufactured using titanium 3D printing manufacturing. Final products after selective laser melting process, magnetic polishing, and ultrasonic cleaning. (b) Quality control measurements of the TTC nails demonstrating key dimensional parameters: circularity and straightness for insertion smoothness, thread pitch distance for accurate compression function, and thread tip width for optimal cutting performance