Purpose: To evaluate the changes in the bone crest around the implants with abutments with platform-switched in a retrospective clinical investigation derived from a previous study.Materials and Methods: Twenty-six healthy patients mean age of 51,6 ± 11,4 with one or more missing teeth were consecutively treated with Prevail implants, with and without platformswitched, conical, and with complete treatment.A total of 68 implants were placed test group with a prevailing implant with platform-switched (34 implants) and control group with the prevailing implant without platform-switched (34 implants).The final restorations were delivered 4 to 11 months after the insertion of the implant.Digital standardized periapical radiographs using customized film holders were obtained at the time of implant insertion and 12 months after.Marginal levels of peri-implant bone were measured on the mesial and distal surfaces of each implant using digital imaging software.Results: All the osseo integrated implants were clinically stable at the 12-month follow-up.The cumulative survival rate was 100%.The average bone loss was 1,34 ± 1,02 mm on mesial and 1,57 ± 0,99 mm on distal for the control group and 0,56 ± 0.85 mm on mesial and 0,82 ± 0,92 mm on distal for the test group.There are no significant differences related to sex, implant site, and bone density.