Purpose: This study aimed to evaluate the prevalence of biological and technical/mechanical complications in edentate elders rehabilitated with complete removable dental prostheses (CDs) and overdentures [tooth-retained (ODs), implant-retained (IODs)]. Materials and Methods: Patient records of adults (>60y) rehabilitated with CDs, ODs, and IODs were included. Demographic information (age, sex), information on the prostheses type, number/type of biological/prosthetic complications, along with the number/time of the complications, were extracted.Kaplan-Meier model was used for the statistical analyses. Results: 162 patients (mean age: 74.5±9.45y; prostheses: n=224, CD=172; OD=21; IOD=31) were included. The average period of function in situ was 19.70±27.66, 32.72±27.84, and 31.73±32.67 months, for the CDs, ODs, and IODs, respectively. 5 prostheses failed. Survival analysis revealed an overall survival rate (SR) of 97.8%, with individual five-year cumulative survival probability of 96.1% for CDs, 94.1% for ODs, and 100.0% for IODs. There were no significant survival differences between maxillary and mandibular prostheses within each type of rehabilitation. In the maxilla, no significant differences were found in maintenance visit times due to prosthodontic complications among the different types of prostheses. Patients with mandibular CDs required maintenance visits earlier compared to mandibular ODs (p<0.001) and IODs (p<0.001). Patients with mandibular ODs also required maintenance visits earlier than those with mandibular IODs (p=0.005). Conclusions: Rehabilitation of the edentate jaws, whether with CDs, ODs, or IODs, is a predictable treatment modality with high survival rates. Differences in maintenance visit times were observed, with CDs and ODs in the mandible requiring earlier visits compared to IODs.
