Inclusion Criteria:  patients> 18 years; smokers <10 cigarettes / day; partially edentulous patients. The spaces must be associated with at least one adjacent mesial and one distal tooth; presence of bleeding and / or suppuration on probing, erythema and inflammation; absence of radiographic bone loss around implant distance (<2mm from expected radiographic marginal bone level); individual dental implants rehabilitated for more than a year; screw-retained restorations on implants; absence of active periodontal disease; who have not taken systemic antibiotics in the last 3 months; adequate oral hygiene motivation and collaboration defined as plaque index <25%  Exclusion Criteria:  totally edentulous patients; uncontrolled systemic diseases; diseases of the mucosa (erosive lichen planus, etc.); taking medications that may interfere with periodontal health or healing; (corticosteroids, calcium channel antagonists, antiepileptic drugs, immunosuppressants, etc.) pregnant or lactating patients; cemented implant restorations; restorations on implants over contoured that cannot be corrected.