RESUMO
The dental implant surface plays a crucial role in osseointegration. The topography and physicochemical properties will affect the cellular functions. In this research, four distinct titanium surfaces have been studied: machined acting (MACH), acid etched (AE), grit blasting (GBLAST), and a combination of grit blasting and subsequent acid etching (GBLAST + AE). Human amniotic mesenchymal (hAMSCs) and epithelial stem cells (hAECs) isolated from the amniotic membrane have attractive stem-cell properties. They were cultured on titanium surfaces to analyze their impact on biological behavior. The surface roughness, microhardness, wettability, and surface energy were analyzed using interferometric microscopy, Vickers indentation, and drop-sessile techniques. The GBLAST and GBLAST + AE surfaces showed higher roughness, reduced hydrophilicity, and lower surface energy with significant differences. Increased microhardness values for GBLAST and GBLAST + AE implants were attributed to surface compression. Cell viability was higher for hAMSCs, particularly on GBLAST and GBLAST + AE surfaces. Alkaline phosphatase activity enhanced in hAMSCs cultured on GBLAST and GBLAST + AE surfaces, while hAECs showed no mineralization signals. Osteogenic gene expression was upregulated in hAMSCs on GBLAST surfaces. Moreover, α2 and ß1 integrin expression enhanced in hAMSCs, suggesting a surface-integrin interaction. Consequently, hAMSCs would tend toward osteoblastic differentiation on grit-blasted surfaces conducive to osseointegration, a phenomenon not observed in hAECs.
Assuntos
Âmnio , Implantes Dentários , Propriedades de Superfície , Titânio , Humanos , Titânio/química , Âmnio/citologia , Âmnio/metabolismo , Osteogênese , Diferenciação Celular , Células Cultivadas , Osseointegração , Células-Tronco/citologia , Células-Tronco/metabolismo , Células-Tronco Mesenquimais/metabolismo , Células-Tronco Mesenquimais/citologia , Sobrevivência Celular , Fosfatase Alcalina/metabolismoRESUMO
As a part of bringing knowledge to healthcare professional, our team searched in the literature the effectiveness of Cetylpyridinium Chloride over SARS-CoV-2. Objectives: Explore the efficacy of Cetylpyridinium Chloride as a mouthwash in the dental attention. Methods: A literature search was realized in PubMed (MEDLINE), with the focusing on the following words: "Cetylpyridinium Chloride", "COVID-19", "Mouthwash", up to June 30, 2020. Results: There is a few information of this biocide over lower and upper airway affection, and other microorganisms. The effect of Cetylpyridinium Chloride over SARS-CoV-2 has not been proved. Although different guidelines recommend oxidative agents as a mouthwash before dental attention. Conclusion: Cetylpyridinium chloride is a cationic biocide widely used as a disinfectant in dentistry and as a mouthwash. Nevertheless, more research is needed, to know the effectiveness of CPC over SARS-CoV-2.
Como parte de entregar el conocimiento al personal medico, nuestro equipo ha realizado una búsqueda sobre la eficacia del Cloruro Cetilpiridinio (CPC) sobre el virus SARS-CoV-2. Objetivos: Explorar la eficacia del CPC como uso de colutorio en la atención dental. Material y Metodos: Busqueda en la literatura mediante Pubmed (MEDLINE), con enfoque en las palabras Cloruro Cetilpiridinio, COVID-19, Colutorio, hasta Junio 30,2020. Resultados: Existe escasa información sobre este biocida y su efecto en las vias respiratorias altas y bajas, como frente a otros microrganismos. El efecto de CPC sobre SARS-CoV- 2 no se ha visto del todo comprobado. Sin embargo diferentes protocolos de actuación dental recomiendan el uso de agentes oxidantes como colutorio previo a la atención dental. Conclusión: CPC es un biocida cationico ampliamente utilizado como desinfectante en la odontología. Sin embargo se necesita mayor evidencia cientifica para demostrar la eficiencia del CPC por sobre SARS-CoV-2.