Search results for "CIENCIAS DE LA SALUD"
showing 10 items of 2623 documents
Consideraciones y diferencias en el tratamiento de un diente fusionado
2004
malformaciones dentales referentes a bigeminismos, fusiones dentarias, etc. presentan una prevalencia que oscila de 0,5 a 5%, dependiendo de factores geográficos, raciales o genéticos. Ello puede comportar una modificación en el tratamiento a llevar a cabo en cada caso particular. La presencia de anomalias en la forma, tamaño y número de dientes es mayor en los llamados síndromes genéticos pediátricos, en muchos de los cuales el retraso mental es una característica asociada. El objetivo de este trabajo es analizar dos casos clínicos similares de fusión dentaria en un incisivo central y trazar un plan de tratamiento individualizado, diferente según las características de cada paciente. El pr…
Silver nanoparticles in resin luting cements: antibacterial and physiochemical properties
2016
Background Silver has a long history of use in medicine as an antimicrobial and anti-inflammatory agent. Silver nanoparticles (NAg) offer the possibility to control the formation oral biofilms through the use of nanoparticles with biocidal, anti-adhesive, and delivery abilities. This study aims to evaluate the antibacterial effect of resin luting cements with and without NAg, and their influence on color, sorption and solubility. Material and methods NAg were incorporated to two dual-cured resin cements (RelyX ARC (RA) color A1 and RelyX U200 (RU) color A2) in two concentrations (0.05% and 0.07%, in weight), obtaining six experimental groups. Disc specimens (1x6mm) were obtained to verify t…
Effect of two different tooth bleaching techniques on microhardness of giomer
2016
Background Tooth bleaching is a safe and conservative treatment modality to improve the esthetic appearance of discolored teeth. One of the problems with the use of bleaching agents is their possible effect on surface microhardness of resin-based materials. The present study was carried out to evaluate the effect of in-office and at-home bleaching on surface microhardness of giomer. Material and Methods Seventy-five disk-shaped giomer samples (Beautifil II) were prepared and cured with a light-curing unit. The samples were randomly assigned to three groups (n=25). In group 1 (control), the samples were stored in distilled water for 14 days. The samples in groups 2 and 3 underwent a bleachin…
A comparative study of aesthetic perceptions of malocclusion among general practice dentists, orthodontists and the public using a visual analogue sc…
2016
Background Perception of malocclusion varies among individuals and among patients and practitioners. Although several indices that tend to coincide in many aspects and unify criteria, no single index has been recognised as the most suitable for assessing orthodontic treatment need. Moreover, orthodontists are not always aware of the differences in perception of malocclusion between patients and practitioners. Objetives To examine the perception of dental anaesthetics amongst dentists, orthodontists and the general population, study the relationship between the perception of dental aesthetics and the severity of the malocclusion, using the visual analogue scale and the IOTN-AC, and investiga…
Spectrophotometric evaluation of dental bleaching under orthodontic bracket in enamel and dentin
2013
Aware of the diffusion capacity of bleaching in the dental tissues, many orthodontists are subjecting their patients to dental bleaching during orthodontic treatment for esthetic purposes or to anticipate the exchange of esthetic restorations after the orthodontic treatment. For this purpose specific products have been developed in pre-loaded whitening trays designed to fit over and around brackets and wires, with clinical efficacy proven. Objective: The objective of this study was to evaluate, through spectrophotometric reflectance, the effectiveness of dental blea - ching under orthodontic bracket. Material and methods: Thirty-two bovine incisors crown blocks of 8 mm x 8 mm height lengths…
Comportamiento clínico y radiológico de 290 implantes con superficie tratada mediante un primer grabado de ácido fluorhídrico y un segundo de ácido f…
2005
Objetivo: El presente trabajo ofrece los resultados sobre el comportamiento clínico y radiográfico, durante dos años, de 290 implantes tratados con un primer grabado de HF y un segundo de HF y HNO3 y que fueron sometidos a carga protética a las ocho semanas de su inserción. Diseño del estudio: Se trata de un estudio observacional prospectivo sobre 290 implantes colocados en 56 pacientes con un rango de edad entre 28 y 81 años. La selección se hizo previo estudio radiológico de proyecciones panorámica y tomográfica para realizar posteriormente el tratamiento implantológico con carga protésica y control evolutivo clínico (15 días, 1, 3, 6, 12, 18 y 24 meses) y radiológico (12 y 24 meses). Res…
Bursitis Hamular y su posible sintomatología craneofacial referida: reporte de dos casos
2006
El diagnostico del dolor craneofacial esta condicionado al manejo interdisciplinario por lo confuso de su presentación especialmente en la ausencia de signos únicos y objetivos. La bursitis es una entidad patológica recientemente notificada en la zona hamular y que debe ser vinculada al diagnostico por exclusión en desordenes temporomandibulares (DTM) y patologías de oído, nariz y garganta, debido a la sintomatología similar a la de otras condiciones que afectan la región de cabeza y cuello. La bursitis del proceso hamular es un patología dolorosa que puede fácilmente ser confundida con neuralgia del glosofaríngeo o del trigémino que genera gran incomodidad en la orofaringe con sintomatolog…
Cholesterol granuloma in the wall of a mandibular dentigerous cyst: a rare case report
2010
Cholesterol granuloma is an inflammatory reaction to cholesterol crystals deposition. It may develop in a variety of sites including the middle ear, mastoid process or even paranasal sinuses. Very few cases of cholesterol granuloma occurring in the jaws were reported. This report presents a rare case of cholesterol granuloma that developed in the wall of a large mandibular dentigerous cyst. The condition was treated with hemimandibulectomy followed by reconstruction with a free fibular flap.
Burkitt's lymphoma of the jaws in the Amazon region of Brazil
2014
Objectives: To describe the clinicopathologic and immunohistochemical features of Burkitt's lymphoma of the jaws in 7 patients of Northern Brazil. Study Design: Clinical data concerning gender, age, affected site, clinical presentation, symptomatology and follow-up were collected from the clinical files. Histopathology was complemented with a broad immunohistochemical panel and in situ hybridization for Epstein-Barr virus (EBV). Results: Most of the patients were infants and 5 out of 7 were males. The mandible was affected in 5 cases and all patients also presented abdominal involvement. All cases were positive for CD45, CD20, CD79a, CD10, Bcl-6 and EBV. Ki-67 proliferative index was approx…
Implantes inmediatos a la exodoncia: situación actual
2004
Los implantes inmediatos son insertados en el mismo acto quirúrgico en el cual se extrae el diente a sustituir. Su porcentaje de éxito varía según diferentes autores entre un 92,7 % y 98,0 %. Su principal indicación es la sustitución de dientes con patologías sin posibilidad de tratamiento. Entre sus ventajas, respecto a los implantes diferidos, están el disminuir la reabsorción ósea del alvéolo post-extracción, el acortar el tiempo de tratamiento rehabilitador y evitar una segunda cirugía de implantación. Como inconvenientes están el requerir, generalmente, técnicas de regeneración ósea guiada con membranas, con el riesgo de exposición e infección de la misma; y la necesidad de injertos mu…