12 Clinical evidence and Science The conical connection – CONELOG® Implant System The patented CONELOG® implant-abutment connection features on the implant side a high-precision, deep, conical connection geometry with a coronal self-locking 7.5° internal taper followed by a short cylindrical segment with three symmetrically arranged grooves (Fig. 7). Upon insertion, the abutment is rotated until tactile engagement of the cams in the grooves of the implant (positional index design). The Platform-Switching concept Platform-Switching is one contributing method to preserve the peri-implant hard and soft tissue by increasing the distance between the implant-abutment connection interface and the alveolar crest. The concept is achieved by placing abutments of narrower diameter on implants of wider diameter (Fig. 8). The positive effect on marginal bone levels of this shift was first described by Lazzara and Porter 2006 (2). It is believed that the Platform-Switching concept decreases the effect of inflammatory cell infiltrates on bone resorption. With CAMLOG® implants both the Platform-Switching as well as the platform matching option can be chosen with the respective selection of abutments. With CONELOG® implants the Platform-Switching concept is part of the implant-abutment connection design (integrated Platform-Switching). SCIENCE BEHIND THE IMPLANT-ABUTMENT CONNECTIONS Fig. 8_Platform-Switching concept: abutment with narrower diameter than implant platform
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