This systematic review aimed to describe and characterize internal tooth bleaching techniques, conventional (walking-bleach) and combined (inside–outside), referring to their efficacy. The research was conducted on the main databases: PubMed, Cochrane Library, EMBASE, and Web of Science. Only randomized controlled trials and cohort studies were considered, on humans of 18 years old or older. A Population, Intervention, Comparison, Outcome (PICO) question was designed to evaluate the scientific evidence. The quality of each randomized controlled trial and cohort study was evaluated using the Cochrane Handbook for Systematic Reviews of Interventions and the Methodological Index for Non-Randomized Studies (ROBINS-I), respectively. The walking-bleach and the combined techniques were both effective at the end of the treatment, obtaining similar aesthetic results. Regardless of the technique used, internal tooth bleaching is an effective procedure, with good aesthetic results, in the treatment of non-vital teeth. The cervical barrier is a standard of care in internal bleaching techniques and should be used. Considering the similarity in the esthetic results obtained in both techniques, the concentrations used for both, and since the biocompatibility of the bleaching agent is more important than its efficiency or speed in obtaining results, the combined technique should be considered the method of choice rather than the walking-bleach technique.

O presente estudo tem como objetivo analisar e compreender as características das manifestações orais causadas pela sífilis e evidenciar a importância do exame oral a fim de obter um diagnóstico adequado e consequentemente um melhor prognóstico. Consiste em uma revisão narrativa de literatura que foi realizada sobre o tema sífilis e suas manifestações orais, na qual foram utilizados artigos científicos que foram encontrados nas bases de dados como SciELO e Biblioteca Virtual em Saúde (BVS) sendo selecionados os que apresentaram maior relevância acerca do objetivo da revisão. A sífilis é uma infecção sexualmente transmissível, curável, causada pelo Treponema pallidum que é uma bactéria gram-negativa facultativa, do grupo das espiroquetas. Sua transmissão se dá horizontalmente pelo contato sexual ou verticalmente durante a gravidez. A partir da revisão de literatura, pôde-se concluir que as manifestações orais da sífilis podem se apresentar de diversas formas, variando de acordo com o estágio em que se encontra a doença. O cirurgião-dentista deve sempre estar atento em lesões sugestivas de sífilis, pois as suas manifestações orais são de suma importância para um correto diagnóstico.

Context: Most patients with COVID-19 have mild respiratory disease, however, neurological manifestations have also been associated. Case report: Female, 21 years old, 24 weeks pregnant, admitted with severe acute respiratory distress syndrome, by COVID-19. Evolved with respiratory failure. On the 14th day of hospitalization, fetal death occurred. After clinical stabilization, she started neurological symptoms, with altered state of consciousness, delusions, tremor in extremities, paresis in right dimidium and paresthesia in extremities. Nuclear magnetic resonance imaging showed numerous old micro- hemorrhagic foci, complemented with angio resonance and inflammatory activity evaluation, with embolic event and vasculitis ruled out. Electroneuromyography showed multiple mononeuritis. She recovered gradually, maintaining the tremor in extremities. Conclusions: Neurological manifestations can occur both by viral cytopathic action and by systemic complications resulting from immunomediated phenomena. In a study carried out in the United Kingdom, by Varatharaj et al, with 125 patients with COVID-19 and neuropsychiatric disorders, the most observed conditions were cerebrovascular event (62%), altered mental status (31%), both present in the case and, in addition, encephalopathy (23%) and encephalitis (18%). The neurological manifestations observed in COVID-19 can affect both the central and the peripheral nervous system. This patient has multiple mononeuropathy, characterized by the involvement of two or more peripheral nerve trunks, with motor and sensory manifestations.