Long-term outcomes and complication rates of tooth-implant-supported fixed dental prostheses: A retrospective cohort study.

PURPOSE

To examine the factors influencing the risk of biological and technical complications in tooth-implant-supported fixed dental prostheses (T-I-FDPs), focusing on location, configuration, and the impact of existing dental health conditions.

MATERIALS AND METHODS

A retrospective cohort study was conducted, accompanied by a follow-up clinical and radiological examination, involving 58 patients (37 women, 21 men; mean age: 63.4 years) who had received 68 T-I-FDPs at least 5 years earlier, at the Department of Prosthodontics, Centre of Oral Rehabilitation, Region Östergötland, Sweden. Correlations between implant placement specifics, arrangement of teeth and implants, and the presence of root-filled teeth on the incidence of complications were analyzed.

RESULTS

The analysis highlighted significant complication risk variance, based on the location in the jaw of the implant, with reduced risk for mandibular placements (Hazard ratio [HR] 0.37). Complex arrangements (HR 2.46) and the presence of root-filled teeth (HR 1.48) were associated with higher complication rates.

CONCLUSION

This study demonstrates that anatomical considerations and preexisting dental health significantly influence the risk of complications in T-I-FDPs. Mandibular implant placements showed a reduced risk of complications compared to maxillary placements. The presence of root-filled teeth and complex prosthesis configurations were associated with higher complication rates. These findings highlight the need for customized treatment strategies to mitigate risks and enhance long-term outcomes for patients with T-I-FDPs.