Figures 13–18. Figure 13. Open-tray impression copings attached to 8 maxillary implants for the final impression. Figure 14. Eight custom abutments used to correct angulations and provide a path of insertion for 8 maxillary implants. Figure 15. The mandibular transmucosal abutments. Figure 16. Final maxillary and mandibular prostheses mounted on the articulator. Note the placement of teeth on the mandibular prosthesis in relation to the screw access holes. Figure 17. Definitive maxillary prosthesis. Figure 18. Definitive mandibular prosthesis.