The Morphology of the Peri-Implantitis Defects: A Cone-Beam Computed Analysis

To study the morphology of the peri-implant defects using cone-beam computed tomography based on a priori case definition of peri-implantitis (≥3mm of radiographic bone loss + inflammatory clinical parameters) Diagnosis of peri-implantitis requires: * Presence of bleeding and/or suppuration on gentle probing. * Increased probing depth compared to previous examinations. * Presence of bone loss beyond crestal bone level changes resulting from initial bone remodeling. In the absence of previous examination data diagnosis of peri-implantitis can be based on the combination of: * Presence of bleeding and/or suppuration on gentle probing. * Probing depths of ≥6 mm. * Bone levels ≥3 mm apical of the most coronal portion of the intraosseous part of the implant.