Fig. 4

Intraoral aspect of suspected intolerance/hypersensitivity to titanium implant placed in the upper incisor region in a patient without periodontal risk predisposition 2 years after implant insertion (A and B) and corresponding intraoral radiograph (C) and in the lower first molar region in a patient with genetic pro-inflammatory predisposition 7 years after implant surgery (D and E) and corresponding intraoral radiograph (F)