Special Print Functional Evaluation of Screw

ments with the designation PS (as in platform switching) is reduced by 0.3 to 0.5 mm relative to and depending on the implant diameter. Figure 2 shows a Camlog Screw-Line K series implant with reduced- diameter bottleneck healing cap, impression posts and straight Esthomic abutment. Male and female patients over 18 years were included in the study if they had one or several teeth missing in the anterior aesthetic zone (teeth 14 to 24), on condition that they had a single-tooth gap bilaterally delimited by natural teeth. The antago- nists had to be either natural teeth or a fixed implant-supported restoration. Implants could not be placed sooner than six weeks following extrac- tion; immediate-placement cases are excluded. Only minor augmentation using e.g. autologous bone chips were permissible during the surgical proce- dure. Any preimplantational bone augmentation had to precede implant placement by at least 3,5 months. Heavy smokers (>ten cigarettes per day) as well as patients with severe systemic diseases could not be included in the study. The study was approved by the Ethics Commission (feci 08/1651); all patients were required to sign an informed-consent form. The clinical procedure followed in this study will be exemplified by two clinical cases. EDI Product Studies 3 Healing phase Provisional restoration DeÞnitive restoration Loading 3 months 12 months 18 months 24 months 36 months 48 months 60 months 0 Bone height White/red aesthetics Patient satisfaction at recall Duration of study: up to 7 years Pilot phase Bone height, deÞnitive restoration Reentry, impression, provisionalization Insertion Removal of sutures 0 10-14 days 56-96 days Fig. 1 Study design. Fig. 2 Platform switching: Screw-Line K series implant with Bottleneck PS healing cap, impression post PS for open-tray impressions and Esthomic PS abutment.