Implant survival rates and biologic complications with implant-supported fixed complete dental prostheses: A retrospective study with up to 12-year follow-up.

OBJECTIVES: To assess the rate of biologic complications and implant survival in edentulous patients treated with implant-supported fixed complete dental prostheses (IFCDPs) after a mean observation period of 5.2 years (range: 1-12 years). MATERIALS AND METHODS: A single-visit clinical and radiographic examination was performed to assess types and rates of biologic complications with ceramic IFCDPs (Group 1) and metal-resin IFCDPs (Group 2). RESULTS: Of 457 rough surface dental implants supporting 71 IFCDPs (52 patients), six had failed, yielding an implant survival rate of 98.7% after a mean observation period of 5.2 years after definitive prosthesis insertion. The most frequent minor biologic complication was soft tissue recession (7.7% annual rate), inflammation under the IFCDP (7.4% annual rate), and peri-implant mucositis (6.3% annual rate). The most frequent major biologic complication was peri-implantitis (2.0% annual rate), in 46/457 implants (10.1%) supporting 19 IFCDPs and late implant failure (0.3% annual rate). The frequency of biologic complications was not statistically different between Group 1 and Group 2. The presence of high plaque index had significant effect on bone loss. CONCLUSIONS: After a mean exposure time of 5.2 years postdefinitive prosthesis insertion (range: 1-12 years), implant survival rate of 98.7% was achieved. The six implant failures in three patients occurred after 5 years and affected the prosthesis survival. Soft tissue recession was the most frequent minor biologic complication, whereas peri-implantitis was the most frequent major biologic complication. A 10-year implant-based mucosal recession rate of 77% (95% CI: 68.2-87.9) and a 10-year implant-based peri-implantitis rate of 20% (95% CI: 16.9-24.9) were found.

First-year students' preparedness for an online dental curriculum.

The COVID-19 pandemic has forced dental schools to rapidly adapt complex curricula for distance learning. In order to design high-quality and effective online educational interventions and adapt dental curricula to the postpandemic "new normal," it is crucial to understand students' preparedness for and attitudes toward this rapid and unanticipated pedagogical shift. This survey study (58% response rate) explored entering first-year dental students' attitudes and beliefs regarding online learning and their prior experiences with various online activities. Students' experiences varied widely, but concern about the impact of personal or life stressors on their academic performance and fear of cheating on online exams were common. Students in academic programs immediately preceding dental school were significantly more confident in their computer-based learning skills. Additional interventions may be needed that prepare students for success in future online courses and to lessen potential disparities among students from diverse social and educational backgrounds.