[COVID-19 in the midst of a "perfect storm" in neoliberal capitalism: critical reflections on its impacts in Brazil].

The impacts of the recent coronavirus pandemic on Brazilian society revealed a scenario that goes beyond a health crisis. This article sets out to present the causes and consequences of a systemic crisis in the neoliberal economic order based on the prominence of markets and social exclusion, while the role of the State - as the guardian of social rights - is neglected. The methodology adopted follows a critical interdisciplinary perspective from the fields of political economy and social sciences, located in socioeconomic reports referred to in this analysis.

Measurement of interfacial porosity at the acrylic resin/denture tooth interface.

Purpose: Small pores of almost uniform shape and size are common in polymeric materials; however, significant porosity can weaken a denture base resin and promote staining, harboring of organisms such as Candida albicans, and bond failures between the artificial tooth and denture base resin. The aim of this study was to investigate the porosity at the interface of one artificial tooth acrylic resin (Trilux, copolymer of polymethyl methacrylate, ethylene glycol dimethacrylate, and color pigments) and three denture base resins: Acron MC (microwave-polymerized), Lucitone 550 (heat-polymerized), and QC-20 (heat-polymerized).

Materials And Methods: Ten specimens of each denture base resin with artificial tooth were processed.