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1.
Rev. mex. ing. bioméd ; 37(2): 115-122, May.-Aug. 2016. graf
Article in English | LILACS | ID: biblio-961317

ABSTRACT

Abstract: Gutta-percha with a sealer cement has been used for many years as a fill for root canal therapies, new materials and techniques have been recently developed that could increase the success rate of endodontic treatments. It is important to compare materials that are used today, with those that are coming to the market, which possess considerable advantages that may well increase the rate of successful treatments. The purpose of this research is to evaluate the adhesion properties of a new bioceramic sealer: EndoSequence® BC SealerTM using BC Points. For this, the following techniques were used: Single cone obturation and lateral condensation with AH-Plus. The results demonstrated differences between the groups of AH-Plus and BC-Sealer. On the bond strength that was applied in the different thirds of the root canal, the sealer cement BC-Sealer proved to be the best adhesion material in all thirds of the root canal being significantly more noticeable in the apical third. The two sealants are effective root canal adhesives, used properly, any of there may grant an acceptable result.


Resumen: A pesar de que la gutapercha con cemento sellador ha sido utilizada durante muchos años, últimamente se han desarrollado nuevos materiales y técnicas que podrían incrementar la tasa de éxito en los tratamientos endodónticos. Es importante comparar materiales que en la actualidad se utilizan con los nuevos que están saliendo al mercado con considerables ventajas que puedan así aumentar el índice de tratamientos exitosos. Por lo tanto, el propósito de esta investigación es evaluar las propiedades de adhesión de un nuevo sellador biocerámico EndoSequence® BC SealerTM usando BC Points. Para esto, se utilizó la técnica de obturación cono único y condensación lateral con AH- Plus. Se encontraron diferencias entre los grupos de AH-Plus y BC-Sealer. Sobre la fuerza de adhesión que se aplicó en los diferentes tercios del conducto radicular, el cemento sellador BC-Sealer demostró ser el material con mejor adhesión en todos los tercios del conducto radicular siendo significativamente más notable en tercio apical. Los dos cementos selladores son efectivos para la adhesión en los conductos radiculares, cualquiera de estos bien utilizados otorgará un resultado aceptable.

2.
Rev. colomb. cardiol ; 14(5): 331-336, sept.-oct. 2007. ilus
Article in Spanish | LILACS | ID: lil-481578

ABSTRACT

Antecedentes: aunque el ecocardiograma y el cateterismo cardiaco se utilizan como primera instancia en el diagnóstico de cardiopatías congénitas, la angiografía por tomografía computarizada es un examen mínimamente invasivo que, mediante imágenes en dos/tres dimensiones en tiempo real, favorece el adecuado abordaje diagnóstico de pacientes con este tipo de patologías, en quienes se requiere una evaluación rápida y precisa de su anatomía extracardiaca. Objetivo: describir la experiencia institucional (agosto 2005-2006) en el uso de la angiografía por tomografía computarizada como método diagnóstico complementario en la evaluación de los pacientes pediátricos con cardiopatías congénitas. Método: estudio descriptivo - serie de casos. Se evaluaron pacientes pediátricos con diagnóstico clínico y ecocardiográfico de cardiopatías congénitas que se estudiaron con el escanógrafo General Electric Multislice Lightspeed/16 cortes. Resultados: mediante angiografía por tomografía, se evaluaron 58 pacientes de 2,4 ± 4,03 años de edad, con historia de cardiopatías congénitas. El 33,8% tuvo diagnóstico de atresia pulmonar, el 6,7% de atresia tricúspide, el 13,5% de doble tracto de salida del ventrículo derecho, el 11, 8% de tetralogía de Fallot, el 11,8% de coartación aórtica, el 3,3% de arco aórtico interrumpido; el 10,3% de ductus arterioso persistente, el 6,7% de drenaje venoso anómalo y el 5,1% de transposición de grandes arterias. Se obtuvieron imágenes de alta calidad que permitieron evaluar de forma precisa la anatomía vascular. Conclusiones: en los pacientes descritos, la angiografía por tomografía resultó ser una herramienta útil en el abordaje diagnóstico ya que permitió reconstruir su anatomía de manera tridimensional. Se requieren nuevos estudios que permitan evaluar la sensibilidad, la especificidad y el nivel de concordancia de esta técnica frente a otros métodos diagnósticos invasivos disponibles para el diagnóstico de este tipo de enfermedades.


Antecedents: although echocardiogram and cardiac catheterization are used as first option tools for congenital heart diseases diagnosis, computed tomography angiography is a minimally invasive exam that through two to three dimensional images in real time gives an adequate approach to patients having this type of pathologies that require a rapid and precise evaluation of its extracardiac anatomy. Objective: describe the institutional experience from August 2005 to August 2006 in the use of angiography by tomography as a complementary diagnostic method in the evaluation of pediatric patients with congenital heart diseases. Method: serial descriptive study. 58 pediatric patients with clinical and echocardiographic diagnosis of congenital heart diseases were evaluated through the General Electric Multislice Lightpeed/16 scanner. Results: 58 patients with history of congenital heart disease were evaluated through CT angiography. Mean age was 2.4 ± 4.03 years. Twenty (33.8%) had diagnosis of pulmonary atresia, four (6.7%) had tricuspid atresia, eight (13.5%) had double-outlet right ventricle, seven (11.8%) had tetralogy of Fallot, nine (15.2%) had alterations of the aortic arch, seven (11.8%) had coarctation of the aorta, two (3.3%) had interrupted aortic arch, six (10.3%) had persistent ductus arteriosus, four (6.7%) had anomalous venous drainage and three (5.1%) had transposition of the great arteries. High quality images that allowed assessing the precise vascular anatomy were obtained. Conclusions: computed tomography angiography turned out to be a useful tool in the diagnostic approach of congenital heart diseases, because it allowed a tridimensional anatomic reconstruction. New studies that may permit the assessment of sensitivity, specificity and concordance level of this technique with other invasive diagnostic methods available for the diagnosis of this type of diseases, are required.


Subject(s)
Angiography , Heart Defects, Congenital , Tomography
3.
Braz. j. med. biol. res ; 34(3): 413-415, Mar. 2001. tab
Article in English | LILACS | ID: lil-281624

ABSTRACT

Ascending aorta coarctation was produced by a minimally invasive technique in rabbits. Animal mortality was 5 percent. Morphometric and hemodynamic parameters were evaluated. A parabiotically isolated heart model was used to assess the hemodynamic parameters. Left ventricular weight/body weight ratio and muscle area showed clear evidence of hypertrophy when compared to control. The hemodynamic changes in the isolated heart model suggested decreased diastolic and systolic function in the coarcted group. The present model produced hypertrophy with low mortality rates as a result of its less invasive nature


Subject(s)
Animals , Aorta/surgery , Aortic Coarctation/surgery , Hypertrophy, Left Ventricular/physiopathology , Minimally Invasive Surgical Procedures/methods , Body Weight , Hemodynamics , Models, Animal , Rabbits
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