Figure 3.

(a–d): Four screenshots from the case designer (KLS Martin-Group, Tuttlingen, Germany) display the one-piece subperiosteal implant (a). A red subvolume is delineated bilaterally in the atrophic maxilla, indicating a planned marginal bone resection (a–d). Four implant posts are deemed adequate to withstand occlusal forces in the edentulous maxilla (similar considerations apply to the mandible). Superimposition with the scanned pre-existing overdentures is depicted in (c,d), facilitating assessment of the implant-borne prosthodontic compensation for the skeletal pseudo-class III; this naturally requires intact intra- and extraoral soft tissues.