Assessment of the Effects of Different Implant Abutment Occluding Materials on Dental Implant Health Parameters and Microbiology

Inclusion Criteria: * Fully edentulous patient * Patient has at least one arch restored with a full-arch dental supported prosthesis Exclusion Criteria: * poor oral hygiene and motivation (as determined with prosthesis in place) * uncontrolled diabetes * pregnant or lactating * substance abusers * current smokers * psychiatric problems or unrealistic expectations * acute infection in the area intended for implant sealing * positive to HIV and hepatitis B and C * affected by autoimmune diseases * under chronic treatment with steroids or non-steroidal anti-inflammatory drugs.