• Mark Kruse, Olof Wolf, Sebastian Mukka, and Anders Brüggemann.
• Department of Surgical and Perioperative Sciences at Umeå University, Umeå, Sweden. mark.kruse@regionvasterbotten.se.
• Eur J Trauma Emerg Surg. 2022 Dec 1; 48 (6): 472747344727-4734.

BackgroundBasic epidemiological data on patella fractures derived from large nationwide and multicenter studies are scarce. This observational register study describes patient epidemiology, fracture classification and treatment of patella fractures in adults in a Swedish population.MethodsWe conducted an observational study on data derived from the Swedish Fracture Register (SFR) on all patella fractures classified as non-periprosthetic and non-pathological, registered between 2014 and 2018 in individuals aged ≥ 18years. Epidemiological data on sex, age, side, seasonal variation, trauma mechanism, fracture classification (according to AO/OTA), and treatment were analyzed.Results3194 patella fractures were analyzed, occurring at a median age of 67 (range 19-100) years. 64% of all patients were female. Most fractures were caused by low-energy trauma, with 70% due to falling from a standing height. 1796 (56%) of the fractures were transverse compared to 845 (26%) vertical fractures. Most fractures (N=2148, 67%) were treated non-operatively. Operative treatment consisted mainly of Tension Band Wiring (TBW) performed in 774 (24%) patients.ConclusionsPatella fractures mainly occur in elderly women (> 65 years), commonly caused by low-energy trauma. The main treatment is non-operative (67%), except for transverse (AO/OTA C3) fractures. TBW remains the most used operative treatment of choice. These results may help health care providers, researchers and clinicians better understand the panorama of patella fractures in Sweden.© 2022. The Author(s).

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