biostudies-literatureUnknown52(9)Eickholz P<h4>Objective</h4>To evaluate the survival of teeth with class II furcation involvement (FI) ≥ 5 years after active periodontal treatment (APT) and to identify the prognostic factors.<h4>Methods</h4>All charts of patients having undergone APT at the Department of Periodontology of Goethe-University Frankfurt, Germany, were screened for teeth with class II FI. APT had to be accomplished ≥ 5 years ago. Charts were analysed for data of class II FI teeth at baseline (T0), after APT (T1) and at the last supportive periodontal care (SPC/T2).<h4>Results</h4>Two-hundred and twenty-two patients (age: 56.5 ± 10.1 years; 118 females; 35 active smokers; 17 diabetics, 154 stage III, 68 stage IV, 94 grade B, 128 grade C) presented 543 teeth with class II FI. Sixty-one patients lost 93 teeth (17%), on average, over 108.4 ± 36.5 months of SPC. Logistic/Cox proportional hazards mixed-model regressions associated increased tooth loss with irregular SPC (p = 0.023/0.073), premolar versus molar (p = 0.041/0.017), root canal filling (RCF) (p < 0.001) and multiple class II FI per tooth at T1 (p = 0.001/0.024).<h4>Conclusions</h4>Of a total of 543 teeth with class II FI, 83% were retained for 108.6 ± 36.5 months. Multiple class II FI at T1, RCF, premolars and irregular SPC were found to compromise the long-term prognosis of teeth with class II FI.Journal of clinical periodontology1298-1305https://www.ebi.ac.uk/biostudies/studies/S-EPMC12377941biostudies-literatureLong-Term Prognosis of Teeth With Class II Furcation Involvement: A Retrospective Cohort Study.PMC12377941Cordis TEickholz PDannewitz BSchroder MPretzl BEl Sayed NLingwal NfalseLong-Term Prognosis of Teeth With Class II Furcation Involvement: A Retrospective Cohort Study.<h4>Objective</h4>To evaluate the survival of teeth with class II furcation involvement (FI) ≥ 5 years after active periodontal treatment (APT) and to identify the prognostic factors.<h4>Methods</h4>All charts of patients having undergone APT at the Department of Periodontology of Goethe-University Frankfurt, Germany, were screened for teeth with class II FI. APT had to be accomplished ≥ 5 years ago. Charts were analysed for data of class II FI teeth at baseline (T0), after APT (T1) and at the last supportive periodontal care (SPC/T2).<h4>Results</h4>Two-hundred and twenty-two patients (age: 56.5 ± 10.1 years; 118 females; 35 active smokers; 17 diabetics, 154 stage III, 68 stage IV, 94 grade B, 128 grade C) presented 543 teeth with class II FI. Sixty-one patients lost 93 teeth (17%), on average, over 108.4 ± 36.5 months of SPC. Logistic/Cox proportional hazards mixed-model regressions associated increased tooth loss with irregular SPC (p = 0.023/0.073), premolar versus molar (p = 0.041/0.017), root canal filling (RCF) (p < 0.001) and multiple class II FI per tooth at T1 (p = 0.001/0.024).<h4>Conclusions</h4>Of a total of 543 teeth with class II FI, 83% were retained for 108.6 ± 36.5 months. Multiple class II FI at T1, RCF, premolars and irregular SPC were found to compromise the long-term prognosis of teeth with class II FI.2025-01-01T00:00:00Z2025 Sep2026-05-10T04:28:15.063Z2026-04-08T01:28:49.619ZS-EPMC123779414045232710.1111/jcpe.14186