biostudies-literatureUnknown14(24)Nakamura F<b>Background</b>: Preservation of posterior occlusal support is critical for maintaining residual dentition in partially edentulous patients. Although implant-supported restorations are widely used, long-term evidence on their role in preventing tooth loss remains limited. <b>Methods</b>: A retrospective cohort study of 225 patients (80 males, 145 females; mean age 53 ± 9 years) who received posterior implant-supported restorations, with a mean follow-up of 21 years. Post-treatment occlusal support was classified using the Eichner classification. Tooth and implant loss were recorded. Associations between residual occlusal support and tooth loss were analyzed using Pearson's chi-square test, with thresholds of ≥1, ≥2, or ≥3 teeth lost. Multivariate logistic regression analyses adjusted forJournal of clinical medicine8939https://www.ebi.ac.uk/biostudies/studies/S-EPMC12734046biostudies-literatureThe Impact of Posterior Occlusal Support Recovery by Dental Implant Treatment on the Survival of Remaining Teeth: A Long-Term Retrospective Study.PMC12734046Sakamoto YJinno YFuruta MNakamura FYamasaki YNakamura TAyukawa YTakeshita TfalseThe Impact of Posterior Occlusal Support Recovery by Dental Implant Treatment on the Survival of Remaining Teeth: A Long-Term Retrospective Study.<b>Background</b>: Preservation of posterior occlusal support is critical for maintaining residual dentition in partially edentulous patients. Although implant-supported restorations are widely used, long-term evidence on their role in preventing tooth loss remains limited. <b>Methods</b>: A retrospective cohort study of 225 patients (80 males, 145 females; mean age 53 ± 9 years) who received posterior implant-supported restorations, with a mean follow-up of 21 years. Post-treatment occlusal support was classified using the Eichner classification. Tooth and implant loss were recorded. Associations between residual occlusal support and tooth loss were analyzed using Pearson's chi-square test, with thresholds of ≥1, ≥2, or ≥3 teeth lost. Multivariate logistic regression analyses adjusted for2025-01-01T00:00:00Z2025 Dec2026-05-27T03:18:28.831Z2026-05-27T03:11:54.889ZS-EPMC127340464146484010.3390/jcm14248939