Validation Use of Implants and Abutments With Biologically Oriented Preparation Technique

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.