Inclusion Criteria:  Male or female ≥18 years old. Need for implant-supported fixed prosthesis in the posterior area of the upper or lower jaw (up to 2 implants and three units bridge); Adequate bone quality and quantity at the implant site to allow the insertion of Sweden and Martina Premium or Prama (Due Carrare, Padova, Italy), of diameters 3.8, 4.25 or 5 mm and lengths between 10 and 13 mm. Healthy ASA type I and II patients. Full-mouth plaque index <20.  Exclusion Criteria:  Smokers ≥10 cigarettes/day. Presence of implant-supported restorations adjacent to the study site. Active periodontitis defined as the presence of pockets with probing depth (PD) ≥5 mm and bleeding on probing (BoP). Systemic medication that contraindicates surgery (bisphosphonates or steroid therapy). Uncontrolled diabetes. Severe bruxism. Pregnancy. Previous history of radiotherapy.