The Use of Platform Bone Switch Implants to Preserve Cervical Bone.

In this retrospective clinical study, 32 oral implants were placed subcrestally in 30 patients who were followed from 1 to 3 years to identify the effect of platform bone switch implants on cervical bone preservation and associated soft-tissue profile. Peri-implant bone, including subpapillary bone and marginal gingival bone, as measured from the implant-abutment junction, was evaluated quantitatively. Preliminary findings indicate that the platform bone switch implants used in this study, compared to conventional straight-wall implants, appear to preserve additional bone at or above the implant-abutment junction to help support papillae and marginal gingiva and maintain coverage of the implant body, with most bone levels shown to be above the implant-abutment junction.