Osteopoiquilosis.: a propósito de tres casos

Los autores presentan el estudio genealógico, clínico y radiológico de una familia con osteopoiquilosis, haciendo hincapié en el diagnóstico diferencial así como en la importancia de la biopsia en el caso de sospecha de una tumoración ósea.The authors show a genealogic, clinic and radiologic study of one family affected by osteopoikilosis. They emphasiz e the differential diagnosis as well as the importance of biopsy suspecting a bone tumor

Manejo de trauma frontal. Revisión de literatura y reporte de casos

Desde la época de Reidel (1898) han sido considerables los avances en el manejo del trauma frontal;sin embargo, el tratamiento para este trauma sigue siendo controvertido y si por alguna circunstancia el manejo no es el adecuado, se pueden presentar serias complicaciones. En este articulo se reportan siete casos manejados por el servicio de Cirugía Oral y Maxilofacial del Hospital Militar Central (HMC) de Bogotá, Colombia, y se hace una revisión de la literatura sobre manejo de fracturas de seno frontal y las diferentes técnicas utilizadas, especialmente en la obliteración del receso frontal con los materiales autógenos o aloplásticos disponibles y las complicaciones más frecuentes

La prótesis Bicontact resultados a 11 años de seguimiento

Peer Reviewe

A facile way to produce epoxy nanocomposites having excellent thermal conductivity with low contents of reduced graphene oxide

A well-dispersed phase of exfoliated graphene oxide (GO) nanosheets was initially prepared in water. This was concentrated by centrifugation and was mixed with a liquid epoxy resin. The remaining water was removed by evaporation, leaving a GO dispersion in epoxy resin. A stoichiometric amount of an anhydride curing agent was added to this epoxy-resin mixture containing the GO nanosheets, which was then cured at 90 C for 1 h followed by 160 C for 2 h. A second thermal treatment step of 200 C for 30 min was then undertaken to reduce further the GO in situ in the epoxy nanocomposite. An examination of the morphology of such nanocomposites containing reduced graphene oxide (rGO) revealed that a very good dispersion of rGO was achieved throughout the epoxy polymer. Various thermal and mechanical properties of the epoxy nanocomposites were measured, and the most noteworthy finding was a remarkable increase in the thermal conductivity when relatively very low contents of rGO were present. For example, a value of 0.25 W/mK was measured at 30 C for the nanocomposite with merely 0.06 weight percentage (wt%) of rGO present, which represents an increase of *40% compared with that of the unmodified epoxy polymer. This value represents one of the largest increases in the thermal conductivity per wt% of added rGO yet reported. These observations have been attributed to the excellent dispersion of rGO achieved in these nanocomposites made via this facile production method. The present results show that it is now possible to tune the properties of an epoxy polymer with a simple and viable method of GO addition. A

Inequidad en los años de vida potencial perdida, por departamentos en colombia 1985-2005

Objetivo Describir las diferencias en los años de vida perdidos en la expectativa de vida al nacer por Departamentos en Colombia, durante el periodo de estudio. Métodos Los datos sobre expectativa de vida al nacer por género, fueron tomados del Departamento Administrativo Nacional de Estadística (DAÑE) para los periodos: 1985-1990, 1995-2000 y 2000-2005. Los datos sobre el país con la mejor expectativa de vida en el mundo fue tomado de los reportes de la Organización Mundial de la Salud. Los años de vida perdidos en expectativa de vida (AVPP) fueron estimados a partir de las diferencias relativas entre valores regionales y los mejores valores del mundo para los periodos de estudio. Resultados El número de AVPP tuvo una tendencia a disminuir en ambos géneros durante el periodo de estudio. Sin embargo hubo Departamentos en los cuales los AVPP fueron mayores para mujeres que para hombres en los tres periodos. Adicionalmente, el peor quintil de AVPP tuvo un valor medio de 18,98 ±2,36 AVPP para hombres y 18,45+/-2,43 AVPP para mujeres en 1985-1990; 16,99+/-1,7 AVPP para hombres y 16,01+/1,46 para mujeres en 1995-2000; y 15,99+/-1,34 AVPP para hombres y 14,51 +/-0,96 AVPP para mujeres en 2000-2005. Los valores para el mejor quintil de LLY fueron respectivamente para hombres y mujeres: 7,41+/-0,65; 8,34+/-0,65 en 1985-1990; 7,22+/-0,62 y 8,59+/-0,31 en 1995-2000; y 7,72+/ 0,58 y 8,89+/-0,67 en 2000-2005. Conclusiones Hubo diferencias en la expectativa de vida al nacer entre Departamentos y géneros en los tres periodos estudiados. Hubo disparidad en el numero de AVPP, comparando con el mejor país en el mundo, por Departamentos, durante los periodos de estudio

Perceptions in the community about the use of antibiotics without a prescription: Exploring ideas behind this practice

Objective: The use of antibiotics without prescription is common in Colombia as well as in other developing countries. The objective of this study is to explore the attitudes and motivations associated with the use of antibiotics without prescription. Methods: Focus group sessions were held with residents of Bogotá. Different socioeconomic groups were approached to identify possible differences of opinion. A semi-structured interview guide was used to guide the discussion, with thematic analysis used to identify central themes. Results: In total, 21 people, aged between 25 and 50 years participated in four focus groups. The results suggest that the use of antibiotics without prescription is common practice. The main reasons included barriers to access to prescribed medications due to limited health insurance. Even those with adequate access to health insurance report being willing to use a treatment without a prescription if they have confidence in its effectiveness. The relationship with the physician is important, but pharmacy storekeepers are also highly trusted. While some participants understood that antibiotics can cure infections but cause serious adverse events, several misconceptions about antibiotics therapy were identified. These included a lack of knowledge of resistance transmissibility among communities. Conclusions: The results have implications for interventions aimed at reducing inappropriate use of antibiotics, highlighting i) how lack of access to timely care creates an incentive to self-prescribe, ii) the key role that pharmacy storekeepers play in the Colombian healthcare system and the need to include them in interventions, and iii) the misconceptions about inappropriate use of medications that need to be addressed by educational programs. These findings provide insights to other countries where antibiotics misuse is also a problem