In the earlier days of implant dentistry, osseointegration was considered to be a sufficient condition for long-term successful implant rehabilitation. With time, however, it became evident that soft-tissue integration is of significant importance and that the formation of an early and long-standing effective mucosal barrier, capable of biologically protecting the peri-implant structures, is essential. This soft-tissue barrier is mainly the result of a wound-healing process that results in an effective interface between “living tissues” and a “foreign body” (Rompen and coworkers 2006).