Clinical evidence and Science 33 Platform-Switching and CONELOG® implants With the introduction of the CONELOG® implant system with the integrated Platform-Switching concept, Moergel et al. (2016 and 2021) (33, 34) conducted an observational study based on the study design of Messias et al. (2019) (30) described above. The implants were inserted in the same indication (single crown, posterior mandible) and according to the same treatment protocol. Again, the marginal bone level changes were evaluated using standardized intraoral radiographs up to 5 years post-loading. The results with CONELOG® implants resembled strongly to the ones achieved with the CAMLOG® implants with Platform-Switching (Messias et al. 2019 (30)). After an initial bone remodeling (-0.50 ± 0.40 mm) the marginal bone level recuperated until 5 years post-loading (bone gain of 0.27 ± 0.47 mm) to the level of the implant shoulder, independent of the initial crestal positioning (sub-, epi-, supracrestal). The biological process with initial bone remodeling after implant placement and subsequent stabilization of the marginal bone level post-loading was also seen in the observational study published by Ackermann et al. 2020 (20). From surgery to loading 0.52 ± 0.55 mm bone was lost. Up to 5 years post-loading the crestal bone remained clinically stable. The mean loss was -0.09 ± 0.43 mm and only 23% of the implants had a noticeable bone loss of more than 0.25 mm. KEY TAKE OUTS: PROVEN BONE MAINTENANCE After a noncritical initial bone remodeling phase, CAMLOG® and CONELOG® implants demonstrated excellent preservation of the crestal bone in the midterm. Post-loading, the marginal bone level around the implants even stabilized better with restorations applying the Platform-Switching concept. PROGRESSIVE-LINE – First clinical evidence The PROGRESSIVE-LINE implants were launched to meet the modern treatment concept «immediacy». They were developed based on many years of experience with SCREW-LINE implants. The proven surface and connections were transferred to this implant line. The outer geometry was consistently designed for situations requiring high primary stability, for example for immediate implantation in extraction sockets, as well as for implantation in very soft bone. The thread design – a saw tooth thread with extended flank height – led to an optimized distribution of axial forces and showed reliable bone integration in a histologic and histomorphometric analysis after 4 months of healing (Iezzi et al. 2006 (35)). The outer geometry of the PROGRESSIVE-LINE implants is conically designed in the apical area knowing the influence of tapered implants on the primary stability (36). The insertion torque can still be influenced with the appropriate drilling protocol. In the coronal area, a crestal anchoring thread gives support for optimal hold with limited bone height, e.g. in sinus lift procedures (Fig. 18). Clinical appliance with sinus lift augmentation The suitability of the PROGRESSIVE-LINE implants for shortened treatment protocols i.e. immediate loading and in combination with simultaneous sinus floor augmentation procedures was evaluated by Ruppin in a retrospective case series after one year in use (Ruppin 2020 (37)). All 166 implants achieved primary stability and the mean insertion torque was 31.6 ± CLINICAL EVIDENCE FOR CAMLOG® AND CONELOG® IMPLANTS
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