Figure 4.

(a,b): The polyamide resection template is affixed to the patient’s biomodel in (a), featuring two extensions at the piriform aperture toward the nasal floor to ensure a one-fit-only design. Holes are provided for potential bony anchorage via screw fixation (note: due to the perfect fit, these holes have not been utilized by the authors thus far). The IPS Implants^® Preprosthetic (KLS Martin-Group, Tuttlingen, Germany) was then placed onto the biomodel, incorporating the intended bone resection in the maxilla, allowing the one-piece subperiosteal implant (b) to fit seamlessly into the bilateral marginal alveolar crest resection. In addition to the resection template, two sets of prosthodontic screws (four each) are visible: only four are necessary to secure the initial provisional suprastructure at the time of surgery and beyond, until the final prosthesis is fabricated.