Porous-based talus reconstruction prosthesis and associated method

A method comprising:

• providing an ankle prosthesis having i) Reconstruct the 3D model from the patient's CT scan, (ii) Identify and mark the area of damaged bone to be removed, (iii) Determine types of the external shape to be design, (iv) Define the lattice structure types and variables, (v) Design the graded gradient such as directional grading or biomechanically grading, (vi) Performances evaluation by simulation to analyze the stress acting on the implants, and (vii) Manufacture by 3D-printing technology;
• wherein the external shape to be designed will be selected from an ellipsoidal, spherical, or anatomically conformed talus implant for use with the intramedullary nail, or as an anatomical talus implant intended to replicate the function of the original talus;
• wherein talus implants are designed with two parameters:
• the vertical diameter and the horizontal diameter;
• wherein a cylindrical volume will be subtracted from the implants to allow the intramedullary nail to pass through;
• wherein anatomical talus implants can be obtained by mirroring the talus from the patient's unaffected ankle;
• wherein the porous size and distribution can be determined by considering the function of the talus implants, osseointegration properties, bone contact regions, screw insertion points, and load-bearing performance.