Evaluation of the esthetic properties of developmental defects of enamel: a spectrophotometric clinical study

Objectives. Detailed clinical quantification of optical properties of developmental defect of enamel is possible with spectropho- tometric evaluation. Developmental defects of enamel (DDE) are daily encountered in clinical practice. DDE are an alteration in quality and quantity of the enamel, caused by disruption and/or damage to the enamel organ during amelogenesis. Methods. Several clinical indices have been developed to categorize enamel defects based on their nature, appearance, microscopic features, or cause. A sample of 39 permanent teeth presenting DDE on labial surface was examined using the DDE Modified Index and SpectroShade evaluation. The spectrophotometric approach quantifies L∗ (luminosity), a∗ (quantity of green-red), and b∗ (quantity of blue- yellow) of different DDE. Conclusions. SpectroShade evaluation of the optical properties of the enamel defect enhances clinical understanding of severity and extent of the defect and characterizes the enamel alteration in terms of color discrepancy and surface characterization

Effect of biofilm removal from the occlusal tooth surfaces on fluorescence measurements. A clinical study

Aim: Early diagnosis and monitoring of caries lesions are the most important issues of primary and secondary prevention policies.The intraoral VistaCamiX(DurrDental, Bietigheim‐Bissingen,Germany) uses the fluorescence phenomenon for a non‐invasive, quantitative caries diagnosis. In order to make a precise evaluation the tooth surface must be completely cleaned and without biofilm. The current study aimed to evaluate the effects of biofilm removal, using air‐polishing device (Combi,MectronSpA) with glycine, on fluorescence VistaCam iX camera quantitative measurements of caries. Methods: Patients with complete permanent dentition without any kind of restorative treatments in the lateral and posterior section of upper and lower dental arches were enrolled. The occlusal surfaces of molars and premolars were photographed using the fluorescence terminal Proof of the intraoral camera VistaCam iX before and after air polishing glycine procedures, registering the highest value gained for each occlusal surface. Results:133cuspidate permanent teeth of patients aged between 13 and 25 were analyzed. Descriptive analysis showed an average of 0.82 (SD=0.65; Min=0.00; Max=1.80; Median=1.20) and of 0.93 (SD=0.60; Min=0.00; Max=1.70; Median=1.20) for values before and after treatment, respectively.The scores assigned by VistaCam iX Proof fluorescence based camera to the occlusal surfaces, after the air‐polishing treatment, are averagely higher than those before treatment, especially in the diagnosis of initial tooth decay. Conclusion: Biofilm removal with glycine air‐polishing improves the VistaCam camera accuracy in recognizing healthy tissue from the decayed one, due to the fact that air-polishing treatment increases the decayed tissue reaction to the fluorescence

Periurbanos hacia el consenso. Recopilación de trabajos

El presente es una recopilación de los trabajos presentados por los equipos de la Estación Experimental Agropecuaria AMBA y sus agencias de Extensión, en el Segundo Encuentro Nacional y Congreso Científico: “Por la soberanía alimentaria y tecnológica para asegurar un derecho humano a la alimentación adecuada”. El mismo se llevó a cabo del 13 al 16 de octubre de 2022 en Tecnópolis, Villa Martelli, Buenos Aires, Argentina.EEA AMBAFil: Mas, Debora Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria AMBA. Área de Comunicación; ArgentinaFil: Guerra, Federico Gaston. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria AMBA. Oficina de Desarrollo Local de Lomas Zamora – Agencia San Vicente; Argentin

Dental hypomineralized enamel resin infiltration. Clinical indications and limits

Enamel hypomineralized lesions are often encountered in clinical practice. Among non-operative treatment options with topical fluoride or casein-phosphopeptide amorphous calcium phosphate) resin infiltrative procedure shows predictable results with minimum patient’s compliance. Enamel resin infiltration clinical procedure and inclusion criteria for enamel resin infiltration treatment have been reported

MAPA PÉ-YARA: O “CAMINHO” DA COMUNICAÇÃO DOS CEGOS E BAIXA VISÃO NAS ESCOLAS PÚBLICAS DO AMAZONAS.

RESUMO O cenário educacional desta pesquisa foi o Amazonas e aborda a criação de um mapa para cegos e baixa visão “gestado” na Faculdade de Educação, no Núcleo de Pesquisa Educotec, e financiado pela Fundação de Amparo à Pesquisa do Estado do Amazonas (Fapeam). Neste artigo, faremos uma análise da pesquisa realizada com o Pé-Yara, o mapa do Amazonas, e verificaremos a trajetória passada pelos pesquisadores na busca de recursos para transformá-lo em produto para as escolas públicas. O mapa propõe uma nova abordagem comunicacional aos estudantes cegos e de baixa visão, com possibilidade de lhes garantir uma educação inclusiva que lhe assegure o direito de aprender brincando. A pesquisa foi centrada na proposta inovadora de criação de um mapa e tem como base o contexto amazônico, no qual os estudantes pouco conhecem os contextos políticos, econômicos, sociais, históricos e educacionais do seu estado. A proposta inicial trabalha uma ferramenta inovadora que surge para ajudar os estudantes e professores a diminuírem as barreiras existentes na escola e propõe ajudá-los a se socializar e descobrir o mundo ao seu redor. O Pé-Yara é mais do que um mapa; é um jogo que, além de ser “quebra-cabeça” com peças em madeira nas formas dos municípios do estado do Amazonas, propõe uma interação com a tecnologia educomunicacional. Com pedido de patente já feita pela Pró-Reitoria de Tecnologia e Inovação (Protec), a Universidade Federal do Amazonas (Ufam) aguarda os trâmites do processo para viabilizar o mais novo produto patenteado e tombado pela UFAM. O Pé-Yara, o mapa Tátil Mapa do Amazonas foi criado com base em teorias construtivistas e interacionistas, a fim de promover o desenvolvimento de conhecimento para crianças e jovens de hoje.   Palavras-chave: Geografia. Mapa. Cegueira. Interface

Oferta e participação nas práticas corporais e atividades físicas na Atenção Primária: análise de 2014 a 2022

Objective: to analyze the temporal trend and macro-regional distribution of the offer of collective activities of body practices and physical activities (BPPA) and the number of participants in Primary Health Care (PHC), developed by all health professionals and by Physical Education Professionals (PEF). Methods: ecological time series study, using data from the Health Information System for PHC (Sisab) between 2014 and 2022, using Joinpoint regression analysis. Results: at the national level, an increase in the number of collective BPPA and PHC participants developed by all health professionals and by PEF was identified between 2014 and 2019, followed by a reduction in both in 2020. In 2021 and 2022 further increases occurred. Conclusion: even though the Covid-19 pandemic occurred, an exceptional scenario and upward trends were identified both in the offer of collective BPPA and participants.Objetivo: analisar a tendência temporal e distribuição macrorregional da oferta de atividades coletivas de práticas corporais e atividades físicas (PCAF) e do número de participantes na Atenção Primária (APS), desenvolvidas por todos os profissionais de saúde e por Profissionais de Educação Física (PEF). Métodos: estudo ecológico de série temporal, usando dados do Sistema de Informação em Saúde para a Atenção Básica (Sisab) entre 2014 e 2022, por meio da análise de regressão Joinpoint. Resultados: em âmbito nacional, identificou-se aumento do quantitativo de atividades coletivas de PCAF e de participantes na APS desenvolvidas por todos os profissionais de saúde e por PEF entre 2014 e 2019, seguido de uma redução de ambos em 2020. Em 2021 e 2022 ocorreu novo aumento. Conclusão: ainda que tenha ocorrido a pandemia da Covid-19, um cenário de excepcionalidade, foram identificadas tendências de aumento tanto na oferta de atividades coletivas de PCAF quanto de participantes

Treatment of severe fluorosis by a combined use of: at-home bleaching and at-office resin infiltration. A case report

Introduction: Severe Enamel Fluorosis is frequently found in young adolescents with aesthetic concerns. Colourimetric alterations could vary from diffuse opacities to demarcated brown and white areas. Material and methods: One young patient with a severe fluorosis was treated by a combined use of at-home bleaching and at-office resin infiltration. Results: In all the affected teeth, existing aesthetic enamel alterations, were successfully treated by the combined use of bleaching and Icon® resin application. Given the minimal substance loss due to the erosion infiltration procedure, the patient was extremely satisfied with the results. Conclusions: Our case report show the capability of treating severe fluorosis with bleaching and subsequent Icon® resin infiltration. Longer observation periods in studies with larger patients population are needed to validate the clinical significance found in this case report

Stanniocalcin 2 contributes to aggressiveness and is a prognostic marker for oral squamous cell carcinoma

Stanniocalcin 2 (STC2), a glycoprotein that regulates calcium and phosphate homeostasis during mineral metabolism, appears to display multiple roles in tumorigenesis and cancer progression. This study aimed to access the prognostic value of STC2 in oral squamous cell carcinoma (OSCC) and its implications in oral tumorigenesis. STC2 expression was examined in 2 independent cohorts of OSCC tissues by immunohistochemistry. A loss-of-function strategy using shRNA targeting STC2 was employed to investigate STC2 in vitro effects on proliferation, apoptosis, migration, invasion, epithelial-mesenchymal transition (EMT) and possible activation of signaling pathways. Moreover, STC2 effects were assessed in vivo in a xenograft mouse cancer model. High expression of STC2 was significantly associated with poor disease-specific survival (HR: 2.67, 95% CI: 1.37-5.21, p = 0.001) and high rate of recurrence with a hazard ratio of 2.80 (95% CI: 1.07-5.71, p = 0.03). In vitro downregulation of STC2 expression in OSCC cells attenuated proliferation, migration and invasiveness while increased apoptotic rates. In addition, the STC2 downregulation controlled EMT phenotype of OSCC cells, with regulation on E-cadherin, vimentin, Snaill, Twist and Zeb2. The reactivation of STC2 was observed in the STC2 knockdown cells in the in vivo xenograft model, and no influence on tumor growth was observed. Modulation of STC2 expression levels did not alter consistently the phosphorylation status of CREB, ERK, JNK, p38, p70 S6K, STAT3, STAT5A/B and AKT. Our findings suggest that STC2 overexpression is an independent marker of OSCC outcome and may contribute to tumor progression via regulation of proliferation, survival and invasiveness of OSCC cells.Peer reviewe