Fig. 3

Detailed view of the guide design. In gray, the body of the 3D printed polyamide guide (a). In red, the planned zygomatic implants. In green, the metal inserts used during drilling (b). The metal insert is pushed in the guide by the surgeon during surgery. After drilling the trajectory, the metal insert is removed to accommodate the thicker diameter of the implant. The direction as well as the depth of the implant is set by the design and physical dimensions of the guide (c). After insertion of the implants, the guide is removed by first removing the mini screws (purple) and then removing the guide in the opposite direction of the slots in the implant guide (red arrow) (d)