Osseointegrated implants have been used with outstanding success in periodontally healthy patients in recent years and have thus become an established part of prosthetic treatment. Whereas initial reports were confined to their use in edentulous patients, in particular in the mandibular area, first results on their application in the oral rehabilitation of partially edentulous patients were published in the mid-1980s. Whether the positive results reported in periodontally healthy patients are also applicable to patients with progressive periodontal disease has yet to be clarified. As only a few controlled longitudinal studies dealing with the success of implants in periodontally involved patients have been published to date, detailed case reports are of great importance.