Objective: This research aimed to assess the impact of the suggestion of changing the clinical moment for the installation of rubber dam isolation during the COVID-19 pandemic, during the graduation period in Faculdade de Odontologia de Pernambuco, Universidade de Pernambuco (FOP/UPE). Materials and methods: This is an observational descriptive, cross-sectional survey of a quantitative nature, which aims to identify the main impacts of the suggestion of changing the clinical moment for the installation of rubber dam isolation in endodontic procedures, which was approved by the Ethics Committee in Research of the University of Pernambuco (CEP/UPE), under allowance ethics committee number CAAE: 47786521.4.0000.5207. The population of this research consisted of FOP/UPE undergraduate students, regularly enrolled from the 6th to the 10th period, in the years 2021 and 2022, and who accomplished dental coronal opening in endodontic treatments, in the practicing clinics of the university during the pandemic period. Information was collected through a questionnaire the researchers prepared, using the online forms application named Google Forms. Results: Only 6.7% identified intercurrences during coronal opening, restricted to difficulties in accessing the pulp chamber. Conclusion: It is understood, therefore, that the suggestions for changing the endodontic care protocol related to the prior installation of rubber dam isolation to the coronal opening procedure were used and did not increase the risk of operative complications by FOP/UPE academics, in the clinics-school during the COVID-19 pandemic.