Aim This study aimed to analyze the influence of finishing and polishing (F/P) protocols on resin surface through roughness (Ra) values and laser scan microscopy observations. Methods Forty-eight (n=48) resin specimens were sorted into four groups (n=12), according to the type of resin used: Filtek Z250 (Z250), Filtek Z350 (Z350), Filtek One Bulk Fill (BF), Filtek P60 (P60). The specimens were sorted into six groups according to the type of F/P system used (n=2/group): Control group, Diamond bur (KG Sorensen), Soflex Pop-On Discs (3M ESPE), Soflex Spiral (3M ESPE), Dura Gloss (American Burs), and Praxis (TDV). Results The highest roughness values (Ra) were attributed to BF group for all F/P systems, except for the Soft-Lex PopOn discs. The Soft-Lex PopOn, Spiral, and Praxis discs presented a better performance for the surface treatment of the tested composite resins. Regardless of the restorative material, the use of diamond bur or single-step abrasive rubber (Dura Gloss) were associated with the highest Ra values. Conclusion The effect of F/P systems on Ra is material-dependent and instrument or system-dependent.

RESUMO Desde o surgimento da COVID-19, causada pelo coronavírus da Síndrome Respiratória Aguda Grave 2 (SARS-CoV-2), inúmeras medidas restritivas foram adotadas pelos governos de diferentes países. O retorno ao atendimento odontológico eletivo no Brasil uma realidade mesmo durante a pandemia do COVID-19. Durante procedimentos odontológicos restauradores, o profissional de odontologia requer contato próximo com o paciente, sendo exposto a saliva e outros contaminantes. Além disso, a transmissão de COVID-19 pela geração de aerossol produzido por peças de mão odontológicas pode ser possível. Assim, a equipe odontológica deve saber agir em durante o procedimento restaurador, colocando em prática os protocolos clínicos corretos para evitar a contaminação cruzada e a disseminação do COVID-19. O objetivo deste artigo é revisar a literatura sobre as práticas de biossegurança, especialmente no contexto de procedimentos odontológicos restauradores em tempo de COVID-19.

ABSTRACT Since the outbreak of the Coronavirus Disease 2019 (COVID-19), caused by the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), numerous restrictive measures have been adopted by governments of different countries. The return to elective dental care in Brazil is a reality even during the COVID-19 pandemic. During restorative dental procedures, the dental professional requires close contact with the patient, being exposed to contaminated saliva and fluids. In addition, transmission of COVID-19 by the generation of aerosol produced by dental handipieces may be possible. Thus, the dental staff must know how to act during restorative dental procedures, putting into practice the correct clinical protocols to avoid cross-contamination and COVID-19 spread. The purpose of this article is to review the literature on the biosafety practices especially in the context of restorative dental procedures in times of COVID-19.

RESUMO Resinas compostas do tipo Bulk fill constituem um material restaurador que apresenta baixas tensão e contração de polimerização, podendo ser inserido em incremento único, de até 4mm de espessura, numa cavidade. Este trabalho objetiva relatar um caso clínico de restaurações em dentes posteriores com o sistema restaurador Bulk fill, empregando o condicionamento ácido seletivo com sistema adesivo autocondicionante de emprego universal. Paciente, sexo masculino, 24 anos, apresentava lesão de cárie na face oclusal do elemento dentário 37 e restauração oclusal de amálgama insatisfatória, no elemento 36. Sendo proposto e realizado tratamento restaurador com Single Bond Universal 3M/ESPE e resina composta bulk fill (3M/ESPE). De acordo com o caso descrito, foi possível observar que os materiais e técnica empregados restituíram forma e função dos dentes envolvidos, preservando a vitalidade pulpar com estética considerada satisfatória. As resinas bulk fill empregadas oferecem praticidade e diminuição do tempo clínico, tendo aplicabilidade clínica satisfatória na reabilitação estética e funcional de dentes posteriores.

ABSTRACT Bulk Fill Composite resins are restorative materials that present low tension and polymerization shrinkage, allowing them to be inserted in a single increment of up to 4 mm of thickness, in a restorative cavity. This paper aims to report a clinical case of restorations done on posterior teeth with Bulk Fill restorative system, using selective acid-etching with self-etch adhesive system. Patient, male, 24 years old, presented a carious lesion on the occlusal surface of dental element 37 and an occlusal unsatisfactory amalgam restoration, on element 36. A restorative treatment with Universal Bond 3M / ESPE and bulk fill composite resin (3M / ESPE) was done. According to the case described, it was possible to observe that the materials and techniques used restored the form and function of the teeth involved, preserving pulp vitality with a satisfactory aesthetic result. The bulk fill resins employed offer practicality and decrease clinical time, with satisfactory clinical applicability in the aesthetic and functional rehabilitation of posterior teeth.