Clinical Application of Angulated Prosthetic Platform Implants: A Retrospective Study

This retrospective study reports on the survival of two-piece angulated prosthetic platform (APP) implants consecutively placed at a specialist periodontics clinic with a mean follow-up of 28.2 ± 15.6 months (range: 4.0 to 71.0). For 183 returning patients who received 239 implants, the survival rates at follow-up (up to 71 months) were 99.2% and 91.1% at the patient and implant levels, respectively. A majority of patients were nonsmokers and did not have diabetes, with a quarter having a history of treated periodontitis. Eighty percent of patients received a single APP implant. Of the implants, 63% supported a single crown, 28% a fixed partial denture, and 9% a fixed complete denture. Nearly all implants were placed either at tooth extraction or after complete bone healing, in approximately equal numbers. Of the implant sites, approximately 75% received bone grafting, with approximately 25% receiving adjunct soft tissue grafting. For 210 surviving and restored implants with satisfactory intraoral radiographs taken at the last recall (mean follow-up: 28.4 ± 15.5 months; range: 4.0 to 71.0 months), the mean radiographic bone levels were -0.70 ± 0.87 mm (range: -3.60 to 2.15 mm). The results demonstrated clinically successful use of this unique geometry implant for multiple applications with acceptable short- to medium-term clinical outcomes.