This study aimed to evaluate the knowledge level of Dentistry students, who have already taken the Dental Radiology and Maternal Child 1 courses at the University of Caxias do Sul in May 2020, on the appropriate prescriptions and protocols of different imaging exams in their daily clinical practice. Materials and Methods: A questionnaire was developed using the Google Forms online platform and divided into different sessions: a) personal information; b) prescription of CBCT; c) students' specific knowledge  regarding CBCT images; d) prescription of dental radiography techniques; e) imaging diagnostics; f) exposure dose; g) care with the radiation protection of both the professional and the patient during processing time for conventional radiographs. Fifty-six participants received the form by email. Results: Regarding CBCT, 66.6% of the respondents have already used it, and 91.6% believe that it is essential to have easy access to this technology. Whereas 37.5% declared thorough knowledge of the main terminologies, 66.67% stated that they rarely prescribe CBCT. Regarding radiation protection, 97.92% of the respondents said they wear a lead apron to ensure patients' protection; however, 23% of the aprons do not include a thyroid gland shield. As for the sensitivity of radiographic films, 50% of the respondents use radiographic film F. Conclusion:Thus, we found that a lack of specific knowledge on CBCT examinations and on conventional radiographic films exists among dental surgeo.