The coronal seal delayed but did not prevent leakage of microorganisms. There was no difference between the various medicaments.

The aim of this study was to compare coronal microleakage in two conditions. Twenty-eight extracted upper molars were endodontically treated and divided into two groups and controls: group A: prefabricated post and core permanently cemented; and group B: prepared for a post and restored with a temporary post crown cemented with a temporary cement. The teeth were thermocycled, immersed in black India ink for 1 week, and made transparent. Results indicated that the permanently cemented, prefabricated post and core produced the best seal (p < 0.01); leakage was significantly greater with the temporary post crown and was similar to that of a positive control group.

Anualmente, 1,3 bilhão de toneladas de alimentos são desperdiçados ou se perdem ao longo das cadeias produtivas. Este volume representa 30% de toda a comida produzida por ano no planeta (FAO, 2011). As perdas estão relacionadas à escolhas e padrões da produção agrícola, infraestrutura, canais de distribuição, armazenamento incorreto, técnicas de colheita e comportamento dos consumidores (FAO, 2011). Deste modo, o objetivo desta pesquisa é determinar os principais pontos na cadeia de distribuição do tomate em que as perdas ocorrem a fim de tornar as rotinas de trabalho mais eficientes e reduzir as perdas.