25dkou151 10.3205/25dkou151 urn:nbn:de:0183-25dkou1512 Meeting Abstract Beckers Beckers Gautier G

Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, Munich, Deutschland

author Simon Simon Dominic D

Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, Munich, Deutschland

author Grimberg Grimberg Alexander A

German Arthroplasty Registry (EPRD Deutsche Endoprothesenregister gGmbH), Berlin, Deutschland

author Steinbrück Steinbrück Arnd A

German Arthroplasty Registry (EPRD Deutsche Endoprothesenregister gGmbH), Berlin, Deutschland

author Schröder Schröder Lennart L

Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, Munich, Deutschland

author Holzapfel Holzapfel Boris B

Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, Munich, Deutschland

author German Medical Science GMS Publishing House

Düsseldorf

610 20251031 engl This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung). M0634 151 Deutsche Gesellschaft für Orthopädie und Unfallchirurgie Deutsche Gesellschaft für Orthopädie und Orthopädische Chirurgie Deutsche Gesellschaft für Unfallchirurgie Berufsverband für Orthopädie und Unfallchirurgie Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2025) Poster | Register und Versorgungsforschung 1 Berlin 20251028 20251031 AB24-4517 TextObjectives and questions: This study aimed to evaluate the safety of primary Total knee arthroplasty (TKA) in patients aged ≥90 years by assessing complication and mortality rates. Additionally, we compared these outcomes with those of younger patient groups and identified comorbidities associated with increased morbidity and mortality.Material and methods: Data for this study was obtained from the German Arthroplasty Registry. The study included 392,929 patients aged ≥60 years who underwent primary TKA for gonarthrosis. Of these, 1,284 patients were ≥90 years old. Patients were divided into four age groups: (I) 60–69 years, (II) 70–79 years, (III) 80–89 years, and (IV) ≥90 years. Minor complications, major complications, and mortality during postoperative follow-up were recorded and compared based on age group and preoperative comorbidities. Mortality rates were further compared with those of the general population using data from the Federal Statistical Office of Germany.Results: Minor complications occurred in 58% (745/1,284) of cases in Group IV, compared to 21% (29,867/144,978) in Group I (p<0.001), with postoperative anemia being the most common (38%). Major complications were significantly more frequent in nonagenarians (18%, 233/1,284) than in sexagenarians (5.2%, 7,524/144,978, p<0.001). One-year mortality increased with age, occurring in 4.0%, 9.6%, 17%, and 36% of patients in Groups I–IV, respectively. Kaplan-Meier estimates showed significantly higher mortality for patients with minor and major complications.Discussion and conclusions: Older age and comorbidities increase complications and mortality after TKA. However, implant-related complications remain low, and with careful selection, nonagenarians can safely undergo TKA, given their lower one-year mortality than the general population. 0 0 0 0