The number of long-term clinical studies assessing the MRICFDP for more than 15 years is limited and clinicians and patients may benefit from knowledge about the outcome of these prostheses in the long term.
The purpose of this retrospective study was to report the implant and prosthetic complications of mandibular metal-acrylic resin implant complete fixed dental prostheses (MRICFDP) opposing a maxillary complete removable dental prosthesis (CRDP) in a 15 to 20-year, post-placement follow-up period.
Methods and Materials
Institutional IRB approval was obtained and the dental records of 24 patients (8 males and 16 females) were reviewed retrospectively to find prosthetic and implant complications. The patients were a subset of a previous prospective study.
5 implants failed to osseointegrate before the second-stage surgery. After the implants were loaded, 6 implants failed. The CSR for the implants in this study was 91.1%.
1. The CSR for the mandibular MRICFDP was 91.7%. The two failures were because of a framework fracture and failure of the underlying implants due to a tumor resection.
2. The CSR for the implants was 91.1%.
3. Tooth fracture (mainly in the anterior) and wear (mainly in the posterior) were the most common complications with the MRICFDP.
4. Screw complications happened only for the retaining screws and not the abutment screws. Many of these complications occurred in the most distal implant position.