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11 CASE STUDY Fig. 28: The milled ceramic superstructures in the raw state. Fig. 34: The hybrid abutments were inserted with a key and the precise alignment was checked. Fig. 30: The customized hybrid abutment had an emergence profile that comes very close to that of a natural tooth. that during the adhesion any excessive ad- hesive can be completely removed. With margins that are located too deeply sub- gingival, residual cement cannot be remo- ved and leads to peri-implant conditions. Because of the high biocompatibility of the materials used and the high precision of the parts, just one day after the prosthetic restoration the crowns are already harmo- niously integrated into their surroundings (Fig. 37) . The radiographic check reveals the precise fit of the restorations and the stable bone after augmentation and Platform Switching (Fig. 38) . The maxilla had already received a new restoration. The patient had been bothered for years by the palatal bar of the prosthesis but was very wary of an implantation. At this stage she could not be convinced to have bone augmentation done so that we were only able to insert three implants using the CAMLOG ® Guide System. Because of the compromised hard tissue conditions, CAMLOG ® SCREW-LINE implants with machined implant necks were used because the situation is easier to treat should recession develop. After preparation of the teeth and taking an impression of the upper jaw, the full- ceramic restoration was manufactured in the dental laboratory. The principle applied was analogous to the description of the lower jaw (Fig. 39 to 42) . Because there were no complications as a result of the treatment, the patient became more confident and we were able to motivate her to undergo the comprehensive measu- res in the lower jaw. At the one-year checkup, we observed significant recessions in the upper jaw near the implants but these are of very little importance visually because of the hybrid abutment. The DVT shows voluminous bone augmentation in regio 35, 36 that was stable and fully reconstructs the lost parts of the alveolar ridge. The situation in the lower jaw is stable (Fig. 43 and 44) . Conclusion With correct positioning and dimensioning Fig. 37: Because of the high biocompatibility of the materials used and the high precision of the parts, the prosthetic restoration harmoniously integrates into its surroundings. Fig. 38: The radiographic check shows stable bone and the precise fit of the reconstruction. Fig. 36: In the lateral view the anatomical emergence profile and the later cement junction located at gingival level can be seen. Fig. 29: After the ceramic superstructures were sintered, they were then bonded to the customized titanium abutment. Fig. 35: The screw heads were covered with foam pellets and the screw access channels were sealed with light-cured composite.