Soft Tissue Integration of Different Abutment Surfaces

Inclusion Criteria: 1. Patient requiring implant supported restoration. 2. Residual alveolar bone width of edentulous jaw of \> 8mm. 3. Keratinized mucosa width of \>6mm 4. Males and females between 18-80 years old 5. Patients with healthy periodontal conditions (Treated periodontitis, PI\<25%, BoP\<25%) 6. Patients that are willing to sign an informed consent and participate in a clinical study 7. Generally fit and healthy and able to undergo oral surgical procedures under local anesthesia. 8. Teeth at the surgical site which required removal were extracted a minimum of 12 weeks prior to sinus floor elevation Exclusion Criteria: 1. Patients who smoke over 10 cigarettes/day 2. Pregnancy (confirmed by verbal inquiry) 3. Chronic systemic pathologies (e.g. diabetes) and neoplastic of the Oro-Facial District 4. 4. Patients taking bisphosphonates 5. Any sites where an implant already failed sites 6. Untreated Periodontitis 7. Dental sites with acute infections 8. Chronic inflammatory diseases of the oral cavity 9. Autoimmune diseases (cortisone intake) 10. Allergy declared to one or more medicaments to be used during treatment 11. Alcoholics patients and/or drug addicts. 12. History or malignant tumours of the maxillary sinus 13. History of local radiation therapy