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2 SCIENCE | CLINICAL RESEARCH The magnificent congress center and the structured professional program created a fascinating contrast for the International CAMLOG Congress in Valencia. The topics, implant positioning and restoration of edentulous jaws, were the main focus, with top-ranking experts presenting evidence-based consensus recommendations. For example, a sub-crestally placed implant shoulder can promote the esthetic outcome and in many cases a higher number of implants can improve the prognosis of restorations in the edentulous jaw. Successful implantology, with reproduc- ible results day after day, is always based on a sound professional footing. On the one hand, this includes the experience of the treating team, coupled with clinical judgement. On the other hand, current science, which is constantly updated and expanded, needs to be taken into account. Systematic reviews of the literature form the top level of evidence from which con- sensus-based recommendations are to be derived wherever possible. These should be oriented towards daily clinical routine work and be implementable in practice. Four such systematic reviews, sponsored by the CAMLOG Foundation, were presented in Valencia. In addition to this, two consensus papers on the topics implant positioning and restoration of edentulous jaws, each of which was elaborated by up to 82 experts from 16 countries in accordance with the highest standards of quality. The congress presidents, Professor Fernando Guerra (University Coimbra, Portugal) and Professor Mariano Sanz (University Complutense Madrid, Spain), emphasized that the publications represent important milestones for the CAMLOG Foundation. Optimal positioning of the implant shoulder For years, experts from academia and practice have seriously debated how to design implant-abutment connections and how to position the implant shoulder with regard to the surrounding tissue. A consensus paper published from the fall of 2013 now makes clear recommendations on the the insertion depth in relation to the crestal bone level – corresponding to the selected implant design [1]. Professor Frank Schwarz from the University of Düsseldorf, Germany, explained why implants with a machined shoulder section (for example, CAMLOG ® SCREW-LINE Promote ® /Promote ® plus) should be inserted at the level of the transition to the micro-rough surface. A systematic review of the literature by his working group showed that this can preserve the approximal bone level better than with sub-crestal placement of machined shoulder sections [2]. In the case of two-piece implants, the always existing micro-gap should be positioned at bone level (epi-crestal) or slightly above (supra-crestal) [1]. This also applies as a matter of principle to implants with structured surfaces up to the shoulder (for example, CONELOG ® SCREW-LINE). However, if esthetics are the overriding factor, a slightly sub-crestal position may prove to be advantageous [1]. As Schwarz explained in detail, the chances increase in this case that the deeper placed implant shoulder still remains below the crestal bone level after remodeling. Recommendations on the proper positio- ning for immediate implantation were given by Dr. Arndt Happe (Münster, Germany) based on the literature and his own clinical experience. Ideally, the shoulder of immediately placed implants should be 3 – 4 mm apical to the soft tissue margin. According to Happe, the enamel-cement boundary should not be used as clinical reference point, as the soft tissue level may still change during the course of treatment or may even be planned this way. In addition, Happe prefers an approxi- mately 1 mm sub-crestal position of the implant shoulder, at a slightly lingual position [3]. The distance to the buccal lamella should be 2 mm and the resulting cavity filled with slow-absorbing bone graft substitute [4]. And finally, Happe ESTABLISHED IMPLANTOLOGY MEETS BOLD ARCHITECTURE 5 TH INTERNATIONAL CAMLOG CONGRESS PROVIDES RECOMMENDATIONS FOR DAILY CLINICAL ROUTINE Experts adopting the consensus papers Prof. Fernando Guerra Prof. Mariano Sanz