Clinical Outcomes of Fixed Dental Prostheses Supported by Teeth or Implants in the Posterior Region—A Long‐Term Retrospective Multicenter Study

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Abstract
Background: Few long‐term studies compare tooth‐ and implant‐supported fixed dental prostheses (FDPs) in the posterior region. Objectives: To compare the 5‐ and 10‐year survival and complication outcomes of tooth‐ and implant‐supported FDPs and to assess patient‐reported effects. Material and Methods: This retrospective multicenter clinical study investigates patients treated with 3–5 units tooth‐supported fixed dental prostheses (TSFDPs) and 1–4 units implant‐supported FDPs in the posterior region at two specialist dental clinics (2009–2019) using clinical and radiographical examinations and Oral Health Impact Profile‐14 (OHIP‐14). Survival, biological, and technical complications as well as patient‐reported effects were recorded. Results: A total of 180 patients with 238 FDPs: 113 TSFDPs, 71 implant‐supported crowns (ISCs), and 54 implant‐supported fixed partial prostheses (ISFPPs) were examined after a mean follow‐up of 10 years. The 5‐year cumulative survival rate for TSFDPs and implant‐supported FDPs was 98% ( p = 0.71). The 10‐year cumulative survival rates were 94% for TSFDPs and 93% for implant‐supported FDPs ( p = 0.87). Eight TSFDPs, three ISCs, and five ISFPPs failed. Biological complications were recorded in 24.8% of TSFDPs and in 9.6% of implant‐supported FDPs ( p = 0.012). Technical complications were recorded in 29.9% of TSFDPs and in 27% of implant‐supported FDPs ( p = 0.62). Low OHIP‐14 scores were reported in patients with tooth‐supported (4.8 ± 6.7), implant‐supported (3 ± 4.3), and with both types of FDPs (3.5 ± 3.6). Scores that indicate a good OHRQoL. Conclusion: Tooth‐ and implant‐supported FDPs had high survival rates after 5 and 10 years. Biological complications had the highest impact on prostheses failure.

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