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Apresenta breve revisão bibliográfica sobre filmes e revestimentos comestíveis, abordando sua produção e os diferentes tipos de filmes e revestimentos de proteína, lipídios e amidos. Discute as propriedades dos filmes como barreiras contra a transmissão de oxigênio e vapor de água. Conclui que o aperfeiçoamento e adaptação da estrutura físico-química e métodos de aplicação dos filmes e revestimentos às características composicionais dos produtos propiciará seu crescimento para outros segmentos da produção de alimentos.

Apresenta breve revisão bibliográfica sobre as alterações fisiológicas, bioquímicas e microbiológicas que comumente acometem os alimentos minimamente processados. Conclui que o aperfeiçoamento das condições de processamento e o desenvolvimento de embalagens apropriadas para as características composicionais do produto propiciará produção promissora de alimentos minimamente processados.

Objective: To investigate the body of evidence in the literature about the most favorable time for initiating orthodontic treatment in patients with severe crowding caused by tooth size arch length deficiency (TSALD). Materials and Methods: Electronic databases (PubMed, Ovid Medline, Scopus, Virtual Health Library, and The Cochrane Library) were searched for articles published between 1900 and April 2014. Studies were included that evaluated treatment of patients with severe crowding caused TSALD, who were treated with first premolar extraction. The association between the stage of development of occlusion at which treatment was started, and the primary and/or secondary outcomes of early and late treatment were investigated. Results: After application of the eligibility criteria and reading of the full texts, six articles were included in the final review. Of these six articles, all of which were retrospective, four showed that the primary outcome (correction of severe crowding) of the early and late groups was improved, but without statistically significant differences after treatment. Therefore, the findings of secondary outcomes in the literature (postretention crowding relapse, duration of total and active treatment [treatment with appliances], external apical root resorption, and soft tissue profile) were the target of this study. These studies presented low or moderate methodological quality and control of bias. Conclusions: Both early and late extraction had a similar effect on correction of crowding. Early treatment had two favorable secondary outcomes (less relapse and reduced active treatment time) vs late treatment. However, the levels of evidence were not sufficient to assert which protocol was superior. (Angle Orthod. 2015;85:510-517.)

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