Inclusion Criteria:  Intercalated mono-edentulous area ridge defects to be rehabilitated with fixed partial bridge At least 18 years old At least 6 months from tooth extraction at the study area.  Exclusion Criteria:  Systemic diseases which could influence the outcome of the therapy (e.g. uncontrolled diabetes mellitus); Smoking ≥ 10 cigarettes a day; Pregnant or nursing women; Chronic use of corticosteroids or other anti-inflammatory or immune-modulator drugs; Patients who need use of medications affecting bone metabolism or oral mucosa; Presence of a congruous FDP at the edentulous area; History of soft tissue augmentation surgery in the study area; Active periodontitis Uncompliant patients