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The purpose of this multicenter randomized controlled trial was to compare the clinical, radiographic, and patient-centered outcomes of early loaded mandibular overdentures deliberately placed on two or three implants. The outcomes were: implant and prosthesis success and survival rates; biological and technical complications; marginal bone loss; patient satisfaction; and periodontal parameters. The results showed no differences between the groups in any of the outcomes analyzed. With the limitations of the present study, and looking at long-term follow-up, the gold standard of prosthetic rehabilitations with attachments, in agreement with the scientific community, should prefer two non-splinted implants.

Edentulism is one of the most significant problems given the increase in the elderly population. The aim of the present investigation is to evaluate a case report with angled screwdriver solutions and new kinds of low-profile attachments in full arch rehabilitation with divergent implants. In this clinical case we will analyze how low-profile abutments with angled screwdriver channel in the OT Bridge system (Rhein83, Bologna, Italy) can be a predictable solution over time to create a fixed prosthesis on disparallel implants with a digital structure (New Ancorvis, Bologna, Italy) for the satisfaction of the patient and of the work team.