Poly(methyl methacrylate) (PMMA) is a widely used polymer for dental applications, and it is mainly used in the fabrication of dental prostheses. In an increasing number of these applications, the risk of suffering bacterial or fungal infection is higher than 60% among oral-prosthesis users. Some authors have reported the failure of other implants in the human body due to biofilm formation on the surface (mainly for total hip implants). In the dental field, the formation of bacterial and fungal biofilms on prosthesis’s surface is the etiologic factor for stomatitis, mainly caused by Candida albicans and bacteria such as Staphylococcus epidermidis, Staphylococcus aureus, Pseudomonas aeruginosa and Enterococcus faecalis, as well as many others. The antibacterial and antifungal properties of silver nanoparticles (AgNPs) have been widely reported, and their use in dental materials can prevent oral infections, such as candidiasis and stomatitis, and promote better oral health in dental-prosthesis users. They can even be used in other biomedical applications that require controlling biofilm formation on surfaces. In this review, the reported studies that use composites of PMMA and AgNPs (PMMA-AgNPs) for dental applications are listed and checked, with the aim of gaining a wider perspective of the use and application of this approach in the dental field.
Antecedentes: El liquen plano bucal es una enfermedad dermatológica inflamatoria crónica de base autoinmune, con infiltración de linfocitos T que destruyen el estrato basal, lo que ocasiona estrías blancas, erosiones, úlceras y diluciones epiteliales de continuidad.Reporte de caso: Mujer de 54 años con múltiples lesiones reticulares y erosivas en región de la mucosa yugal y bordes laterales de la lengua, así como gingivitis descamativa. Se inició tratamiento con mometasona tres veces al día por 20 días e intermitentemente con miconazol en gel, para prevenir micosis iatrogénica por el corticosteroide. La paciente fue revisada a los 20 días, al cabo de los cuales se observó mejoría de 80 % de las lesiones con ulceraciones centrales, lo que permitió la ingesta de alimentos y líquidos sin dolor y mejoró la calidad de vida.Conclusiones: En las enfermedades autoinmunes es importante la correlación clínico-histopatológica para establecer el diagnóstico definitivo. El seguimiento clínico de estos pacientes se debe realizar a largo plazo, para lograr la remisión de las lesiones, control de la enfermedad y evitar futuras complicaciones.
RESUMEN: Los criterios histológicos para determinar el grado de displasia, la clasificación de Broders y el frente de invasión tumoral (FIT) son parámetros subjetivos no cuantificables que pueden indicar el grado de evolución de displasias y carcinomas. Un factor importante a considerar durante la valoración histológica, es la variabilidad del diagnóstico entre patólogos. El objetivo es estandarizar los criterios y determinar la variabilidad intra e inter observador en el diagnóstico de displasias y COCE. Se seleccionaron y estandarizaron los criterios morfológicos para el diagnóstico y se revisaron los casos seleccionados aleatoriamente por tres patólogos bucales (30 displasias y 30 carcinomas) del
ECA2 receptors have an important gene expression in the squamous cells of the tongue and salivary glands, a mechanism that is convenient for the inoculation of SARS CoV2 since it seeks to make the assembly complex through its glycoprotein or spike protein towards the ECA2 receptor of the oral mucosa. Once inoculated and favored by proteases, it is the key that allows the entry of the virion into the host cell for its subsequent replication, increase of viral load and potential deamination and infection; dental professionals must be alert to the mechanisms of infection in the oral cavity for their own protection and that of the patients who are treated by this health personnel.
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