Objective: To assess the attitudes and knowledge about hepatitis by scholars and dental practitioners from Recife and its metropolitan region. Method: The research protocol was submitted and approved by the Ethics and Human Research Committee of the Federal University of Pernambuco. There were included 230 undergraduate students in dentistry and 104 dentists who exercise their professional activity in Recife and its Metropolitan Region. They signed a consent form and answered a questionnaire, the evaluative instrument, with objective questions about biosafety, transmission of hepatitis and sexually transmitted diseases. Results: About the types of hepatitis 133 (57.8%) students and 61 (58.7%) professionals claimed to know the types A, B and C. Concerning transmission 31 (13.5%) students and 25 (24.0%) professionals said that the main route of transmission were sexual and bloodstream respectively. Relating to imunization 221 (96.1%) students and 99 (95.2%) professionals reported that have been vaccinated against hepatitis B, however, only 126 (54.8%) students and 55 (52.9%) professionals have followed the immunization’s schema. Regarding the cleaning of the office equipment, 18.7% of the students replied that they do not know who does it. 56.7% of professionals said that it was performed with alcohol 70 ° GL.Conclusions: The findings indicate that there is a concern for biosafety but the knowledge about the forms of hepatitis transmission and biosecurity measures need to be better settled.Este estudo teve como objetivo realizar uma revisão sistemática da literatura para avaliar os efeitos dos hábitos parafuncionais de sucção sobre a ATM e estruturas adjacentes em crianças. Os artigos incluí- dos foram identificados por meio de pesquisas bibliográficas da Bireme, Pubmed, ClinicalTrials.gov, The National Research Register e Pro-Quest Dissertation Abstracts and Thesis, usando os termos de busca temporomandibular joint, sucking behavior and fingersucking. As pesquisas sobre os hábitos atuais ou anteriores de chupar o dedo e/ou uso de mamadeiras e chupetas e a presença de dor na ATM com crian- ças até 12 anos foram incluídas. Oito estudos foram selecionados, e 4 apresentaram uma associação, mas sem significância estatística. Os achados científicos demonstram uma associação baixa ou ausente de DTM com hábitos de sucção parafuncionais.