Introduction: Mobile learning offers several benefits, such as new learning environments. We developed and validated a smartphone application for orthopedics and traumatology residents in an attempt to assist their study and, consequently, pass the Board of Orthopedics and Traumatology Exam. Methods: quantitative study, aimed at the validation of a mobile application. It was developed for the iOS® and Android® platforms, in the Portuguese language, and free of charge. 132 participants, divided into three groups, used the tool. A validated questionnaire - System SUS Scale (SUS) - and a questionnaire created by the authors (properly validated) were used to assess the practicality and viability of the application as a learning tool. The mode, the absolute frequency and the percentage of the studied variables were crossed by Fisher's test or Pearson's chi-square test. Results: of the 132 participants, 55.3% have iOS®. All participants said they had already used an application on their smartphones, whereas 6 (4.5%) mentioned never having used applications for academic purposes (p value <0.001). 100% said it was a useful technology in the resident's theoretical development. 124 (93.9%) agreed it was an auxiliary learning method for orthopedic doctors in general. An average SUS score of 84.2 (SD 10.8) was obtained with a margin of error of 1.9. The SUS score varied between 82.4 and 86.1 (95% CI). Cronbach's alpha coefficient was 0.797. Conclusion: the developed application was successful in the tests performed and can be an alternative in medical education in the orthopedic area.

Objective: To analyze the epidemiological transition of fractures in patients who were treated in a tertiary hospital which is reference in traumatology during the COVID-19 pandemic to assess the changes in trauma service. Methods: This is a retrospective and descriptive analysis of data on orthopedics lesions treated at Instituto Doutor Jose Frota between December 16, 2019 and June 16, 2020 (three months before and after the first case of COVID-19 in Ceará). Results: In total, we evaluated 913 patients, 28.5% of which were women and 71.5%, men. We found a significative reduction (p < 0.05) in the proportion of female patients operated in the analyzed time. We also observed an increase in patients’ mean age, 35.4 years before the pandemic, and 38.48 (p = 0.04) during the consecutive period. Trauma mechanisms significantly changed (p < 0.05), with a proportional increase of high-energy traumas and reduction of instances of falling. We found a 11.9% reduction in orthopedic surgeries, from 655 to 577 at the time after the first case of COVID-19 (p = 0.071). Mean hospitalization length (p < 0.001) and time until surgeries decreased (p < 0.001). Conclusion: We observed the impact of lockdown in this hospital of trauma especially via the decreased number of operated cases and the change in patients’ profile and trauma mechanism. Level of Evidence III, Retrospective Comparative Study.