Part of the oral health care in the care network encompasses users in emergency cases. This study proposed mapping the determinants of the use of dental care services within the health care network to address dental emergencies within the Brazilian Unified Health System (UHS) and to verify the main gaps in the research in this area. This is a scoping review that took place in 2018 using Andersen's behavioral model as a reference. A total of 16 studies, out of 3786 original articles identified, were included and reviewed. Two reviewers independently conducted the selection process and the decision was consensually made. The mapping of the determinants revealed a greater number of enabling factors and a larger gap in the results. Greater use of the emergency service was registered by people in pain, women, adults, those from an urban area, people with a lower income, and those with less education. In future studies, primary surveys are recommended, which include all ages, and analyze different groups of needs and users that take into account the country's northern region and the different subjects pointed out by this review.