This retrospective observational study aims to evaluate early marginal bone loss around dental implants using panoramic radiographs. Radiographic records of patients who underwent mandibular dental implant surgery and implant-supported prosthetic rehabilitation will be reviewed. Marginal bone loss will be measured on the mesial and distal aspects of each implant at final restoration delivery and at follow-up periods after prosthetic loading. The study will also assess patient-, implant-, and prosthesis-related factors associated with marginal bone loss.