The aim of this study was to analyze the chemical composition and surface topography of commercially pure titanium implants, obtained from three trademarks frequently used in dentistry. There were nine titanium implants of the following systems: As Technology, Neodent and Sistema Nacional de Implantes. These materials were divided into three groups, with three implants in each group. Photoelectron Spectroscopy Excited by X-ray (XPS) was used to determine the chemical composition, while to characterize the surface topography we used Scanning Electron Microscopy (SEM). Titanium, carbon, silicon and oxygen were identified in all samples analyzed. Other contaminants were: silicon, aluminum, sulfur, lead, phosphorus, calcium, sodium and nitrogen. We identified impurities on the surface of all implants analyzed. We consider necessary to development more studies relating the presence and concen...

Squamous cell carcinoma (SCC) is the most prevalent malignancy in the oral cavity. Because most of the SCC cases are diagnosed late, treatment has been linked to radical and disfiguring surgery, as well as high rates of recurrence and unfavorable forecasts. Currently, technological advances allow more conservative surgical treatments. In addition, new models of chemotherapy and radiotherapy significantly affect treatment and outcome of patients. However, some researchers have reported only a small improvement in the survival rate in advanced SCC, the same that continues presenting an extremely poor prognosis. SCC initial cases have a better prognosis when compared to advanced cases. Therefore, the prevention, early diagnosis and prompt treatment setting are essential to prevent premature deaths, aesthetic disfigurement and functional sequels caused by this disease.

The aim of this study was to analyze the chemical composition and surface topography of commercially pure titanium implants, obtained from three trademarks frequently used in dentistry. There were nine titanium implants of the following systems: As Technology, Neodent and Sistema Nacional de Implantes. These materials were divided into three groups, with three implants in each group. Photoelectron Spectroscopy Excited by X-ray (XPS) was used to determine the chemical composition, while to characterize the surface topography we used Scanning Electron Microscopy (SEM). Titanium, carbon, silicon and oxygen were identified in all samples analyzed. Other contaminants were: silicon, aluminum, sulfur, lead, phosphorus, calcium, sodium and nitrogen. We identified impurities on the surface of all implants analyzed. We consider necessary to development more studies relating the presence and concen...

Squamous cell carcinoma (SCC) is the most prevalent malignancy in the oral cavity. Because most of the SCC cases are diagnosed late, treatment has been linked to radical and disfiguring surgery, as well as high rates of recurrence and unfavorable forecasts. Currently, technological advances allow more conservative surgical treatments. In addition, new models of chemotherapy and radiotherapy significantly affect treatment and outcome of patients. However, some researchers have reported only a small improvement in the survival rate in advanced SCC, the same that continues presenting an extremely poor prognosis. SCC initial cases have a better prognosis when compared to advanced cases. Therefore, the prevention, early diagnosis and prompt treatment setting are essential to prevent premature deaths, aesthetic disfigurement and functional sequels caused by this disease.

En el presente estudio se identificaron las bacterias anaerobias estrictas y facultativas frecuentes en necrosis pulpares sépticas asintomáticas. Se tomaron muestras bacterianas de 18 conductos radiculares con diagnóstico Clínico y radiográfico de necrosis pulpar séptica asintomática de pacientes con rango de edades de entre 18 a 60 años que iniciaron su tratamiento en el departamento de endodoncia de la División de Estomatología del Hospital Militar Central. Las muestras fueron transportadas y cultivadas en condiciones de anaerobiosis. Luego, fueron subcultivadas con la finalidad de obtener cultivos puros que estuvieran aptos para la identificación microbiana. El procedimiento de identificación utilizado fue el sistema API 20 A para anaerobios. El procedimiento de identificación utilizado fue el Sistema API 20 A para anaerobios. Los resultados mostraron que los géneros bac...

Las prótesis maxilofaciales retenidas en implantes extrabucales o fijaciones cráneofaciales son herramientas claves en la rehabilitación de pacientes con alteraciones faciales debido a resecciones asociada con enfermedades, traumas graves, malformaciones y otros. El uso de implantes craneofaciales se caracteriza, principalmente, por ser procedimientos quirúrgicos rápidos, efectuados con anestesia general o local, con poca morbilidad y gran versatilidad para tratar diferentes áreas cráneofaciales como la región orbitaria, auricular y nasal, entre otras. Sin embargo, aún existen dudas respecto a los protocolos e indicaciones de tratamientos asi como en otros tópicos de relevancia. La siguiente revisión bibliográfica tiene como objetivo recolectar la información científica disponible respecto de las fijaciones cráneofaciales abordando diferentes elementos de la evolución y p...