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Search Results: 1 - 10 of 68629 matches for " José; Sepúlveda Infante "
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Carcinoma odontogénico de células claras
Flores Alvarado,Sergio Alberto; Morales Casas,José; Sepúlveda Infante,Rogelio; Romero de León,Elías;
Revista Cubana de Estomatolog?-a , 2011,
Abstract: clear cell odontogenic carcinoma is a rare malignant odontogenic neoplasm, with a predilection for the anterior segment of the jaws, and presenting basically in women between the fifth and seventh decades of life. ccoc is composed histopathologycally by strands or groups of cells showing clear cytoplasm associated with cells showing eosinophilic cytoplasm and some times with tall columnar cells that resambled ameloblasts. ccoc is considered a low-grade malignancy but in some cases its behavior is aggressive giving local and distant metastasis, so the recommended treatment is a radical resection and follows the patient very close. ccoc should be diferenciated microscopically from other local and metastatic lesions that are composed with clear cells also, in order to render a proper diagnosis and treatment. we are presenting a clinical case corresponding to a 69 years old female patient, with a 10 year history of a slow growing anterior mandibular lesion without lymph node or distant metastasis, with a biopsy diagnosis of clear cell odontogenic carcinoma, the patient was treated by partial resection of the anterior mandible and reconstructed with a titanium plate.
Carcinoma odontogénico de células claras Odontogenic carcinoma of clear cells
Sergio Alberto Flores Alvarado,José Morales Casas,Rogelio Sepúlveda Infante,Elías Romero de León
Revista Cubana de Estomatolog?-a , 2011,
Abstract: El carcinoma odontogénico de células claras es un raro tumor odontogénico que se presenta principalmente en la parte anterior de la mandíbula, mayormente en mujeres entre la quinta y séptima década de vida. Se caracteriza histológicamente por redes de células con citoplasma claro mezcladas con células que contienen citoplasma eosinófilo. Es sumamente agresivo y puede presentar metástasis local o a distancia. Al emplearse el tratamiento por enucleación y curetaje, frecuentemente da lugar a recurrencia, por lo que se aconseja el tratamiento radical de resección mandibular hasta una zona libre de lesión. El carcinoma odontogénico de células claras debe ser considerado en el diagnóstico diferencial de tumores mandibulares que presenten células claras para el establecimiento del plan de tratamiento adecuado. Se debe incluir el seguimiento a largo plazo del paciente. Se presenta el caso de un paciente femenino de 69 a os de edad, con una lesión presente en la región presinfisaria derecha, sin afectación de ganglios linfáticos regionales o metástasis aparente. Se efectuó osteotomía segmentaria mandibular y reconstrucción con placa de titanio. Clear cell odontogenic carcinoma is a rare malignant odontogenic neoplasm, with a predilection for the anterior segment of the jaws, and presenting basically in women between the fifth and seventh decades of life. CCOC is composed histopathologycally by strands or groups of cells showing clear cytoplasm associated with cells showing eosinophilic cytoplasm and some times with tall columnar cells that resambled ameloblasts. CCOC is considered a low-grade malignancy but in some cases its behavior is aggressive giving local and distant metastasis, so the recommended treatment is a radical resection and follows the patient very close. CCOC should be diferenciated microscopically from other local and metastatic lesions that are composed with clear cells also, in order to render a proper diagnosis and treatment. We are presenting a clinical case corresponding to a 69 years old female patient, with a 10 year history of a slow growing anterior mandibular lesion without lymph node or distant metastasis, with a biopsy diagnosis of clear cell odontogenic carcinoma, the patient was treated by partial resection of the anterior mandible and reconstructed with a titanium plate.
Construction of a Potentiostat to Perform Electrochemical Impedance Spectroscopy (EIS) Tests  [PDF]
Francisco Sepúlveda, José Hernández, Andrés Manríquez
Modern Instrumentation (MI) , 2017, DOI: 10.4236/mi.2017.62002
Abstract: In this work, it was developed the construction of a potentiostat for the execution of Electrochemical Impedance Spectroscopy (EIS) experiments, using an Agilent 33220a signal generator, a RIGOL 1064b oscilloscope and a protoboard for the connection of operational amplifiers to an electrochemical cell. The coordination of the global operation, in addition to data acquisition, was performed using a code generated in the LabVIEW program. The system analyzed was the corrosion of an 1100 aluminum plate in water, in order to compare the results obtained by other authors. The data acquisition consisted in obtaining the values of amplitude, RMS voltage and phase angle between the generated power signals and the current output, in order to obtain the impedance of the system, for different signal frequencies. Finally, the values obtained were plotted on a Nyquist diagram. In this way, the objective of this article is to demonstrate that with conventional laboratory equipment it is possible to implement an experimental device, capable of delivering results similar to those obtained by commercial equipment.
Frecuencia de diagnósticos histopatológicos en un periodo de 20 a?os (1989-2008)
Romero de León,Elías; Sepúlveda Infante,Rogelio;
Revista Cubana de Estomatolog?-a , 2010,
Abstract: to submit data on the histopathological diagnosis made in the oral pathology department of stomatology of autonomous university in nuevo león, monterrey, mexico during from 1989 to 2008. from 2 183 biopsies, bone tissue lesions accounted for 637 cases (29.2 %) and those that soft tissue summarized 1 529 (70 %), from dental tissue 17 samples (0.8 %) were processed. for bone tissue the more frequent diagnoses were: periapical granulomas, periapical cyst, dentigerous cyst and odontogenic keratocyst (keratogenic odontogenic tumor). the more frequent diagnoses for the soft tissue are: fibroma, pyogenic granulomas, mucocele, epidermoid carcinoma and papiloma. in maxillary there were 292 cases, in maxilla 258 and in 87 samples there was no specification from which maxillary was obtained the biopsy. in soft tissue, from gum 505 biopsies were obtained, from inferior lip 164, from soft tissue 157 were not specified, tongue 147, alveolar mucosa 146, hard palate 89 and other areas underwent 321 biopsies. from female patients 1 370 biopsies were obtained (62.8 %) and from male patients 796 biopsies (36.4 %). there was a coincidence of 1 482 cases (67.9 %) between the clinical diagnosis and the histopathological one, the no coincident ones summarized 172 (7.9 %) and 529 cases (24.2 %) where there wasn't clinical diagnosis being acceptable according to similar studies, but could be significantly improved by a continuous education.
Proporción de concordancia entre los diagnósticos clínico e histopatológico bucofaciales durante 20 a?os
Sepúlveda Infante,Rogelio; Romero de León,Elías;
Revista Cubana de Estomatolog?-a , 2011,
Abstract: to determine the proportion of agreement between the clinical and histopathologic diagnoses of study biopsies in the oral pathology department. from the registry book from years 1989 to 2008 the histopathologic diagnoses of 2 183 biopsies were collected codifying the different study variables and were processed using epi info to obtain the frequencies end percentages. this study presents a 7.9 % of agreement, a slight agreement of 13.8 %, no-agreement of 7.9 % and without clinical diagnosis of 24.2 %. the salivary glands lesions showed the high agreement for the 66.8 % and for the bone tissue the non-odontogenic cysts occupied the first place of agreement for the 80.0 %. there was an acceptable agreement higher than other similar studies. there is the possibility to improve these features by means of a continuous updating of the clinical diagnoses.
Frecuencia de diagnósticos histopatológicos en un periodo de 20 a os (1989-2008) Histopathological diagnosis frequency during 20 years (1989-2008)
Elías Romero de León,Rogelio Sepúlveda Infante
Revista Cubana de Estomatolog?-a , 2010,
Abstract: Presentar datos sobre el diagnóstico histopatológico que se realizó en el Departamento de Patología Oral de la Facultad de Odontología de la Universidad Autónoma de Nuevo León, Monterrey, México, durante el periodo 1989 a 2008. De 2 183 biopsias, las lesiones de tejido óseo comprendieron 637 casos (29,2 %) y las de tejido blando sumaron 1 529 (70,0 %), de tejido dental se procesaron 17 muestras (0,8 %). Los diagnósticos más frecuentes para tejido óseo fueron: granuloma periapical, quiste periapical, quiste dentígero y queratoquiste odontogénico (tumor odontogénico queratoquístico). Los diagnósticos más frecuentes de tejido blando fueron: fibroma, granuloma piógeno, mucocele, carcinoma epidermoide y papiloma. En el maxilar se presentaron 292 casos, en la mandíbula 258 y en 87 muestras no se especificó el maxilar de donde se obtuvo la biopsia. En el tejido blando, de encía se obtuvieron 505 biopsias; labio inferior 164, tejido blando sin especificar 157, lengua 147, mucosa alveolar 146, paladar duro 89 y otras áreas presentaron 321 muestras. De pacientes femeninos fueron 1 370 muestras (62,8 %) y los masculinos con 796 biopsias (36,4 %). Hubo coincidencia entre el diagnóstico clínico con el histopatológico de 1 482 casos (67,9 %), los casos no coincidentes fueron 172 (7,9 %) y 529 casos (24,2 %) donde no se proporcionó diagnóstico clínico, lo cual es aceptable de acuerdo a estudios similares, pero puede ser mejorado substancialmente a través de educación continua. To submit data on the histopathological diagnosis made in the Oral Pathology Department of Stomatology of Autonomous University in Nuevo León, Monterrey, Mexico during from 1989 to 2008. From 2 183 biopsies, bone tissue lesions accounted for 637 cases (29.2 %) and those that soft tissue summarized 1 529 (70 %), from dental tissue 17 samples (0.8 %) were processed. For bone tissue the more frequent diagnoses were: periapical granulomas, periapical cyst, dentigerous cyst and odontogenic keratocyst (keratogenic odontogenic tumor). The more frequent diagnoses for the soft tissue are: fibroma, pyogenic granulomas, mucocele, epidermoid carcinoma and papiloma. In maxillary there were 292 cases, in maxilla 258 and in 87 samples there was no specification from which maxillary was obtained the biopsy. In soft tissue, from gum 505 biopsies were obtained, from inferior lip 164, from soft tissue 157 were not specified, tongue 147, alveolar mucosa 146, hard palate 89 and other areas underwent 321 biopsies. From female patients 1 370 biopsies were obtained (62.8 %) and from male patients 796 biopsies (36.4 %).
Proporción de concordancia entre los diagnósticos clínico e histopatológico bucofaciales durante 20 a os Proportion of agreement between the clinical and the histopathologic diagnosis during 20 years
Rogelio Sepúlveda Infante,Elías Romero de León
Revista Cubana de Estomatolog?-a , 2011,
Abstract: Se realizó un estudio para determinar la proporción de concordancia entre los diagnósticos clínico e histopatológico de las biopsias estudiadas en el departamento de Patología Bucal de la Facultad de Odontología de la Universidad Autónoma de Nuevo León. Se recopilaron los diagnósticos histopatológicos de 2 183 biopsias a partir del libro de registro de los a os 1989 a 2008. Se asignaron códigos a las distintas variables estudiadas y se procesaron con Epi Info para obtener las frecuencias y porcentajes. El estudio presentó una concordancia del 54,1 %, ligera discordancia del 13,8 %, no concordancia de 7,9 % y sin diagnóstico clínico un 24,2 %. Las lesiones en glándulas salivales presentaron la mayor concordancia con un 66,8 % y para tejido óseo los quistes no odontogénicos ocuparon el primer lugar de concordancia con el 80,0 %. Se encontró una concordancia aceptable, superior a otros estudios similares. Existe la posiblidad de mejorar el nivel científico mediante la actualización continua de los clínicos. To determine the proportion of agreement between the clinical and histopathologic diagnoses of study biopsies in the Oral Pathology Department. From the registry book from years 1989 to 2008 the histopathologic diagnoses of 2 183 biopsies were collected codifying the different study variables and were processed using Epi Info to obtain the frequencies end percentages. This study presents a 7.9 % of agreement, a slight agreement of 13.8 %, no-agreement of 7.9 % and without clinical diagnosis of 24.2 %. The salivary glands lesions showed the high agreement for the 66.8 % and for the bone tissue the non-odontogenic cysts occupied the first place of agreement for the 80.0 %. There was an acceptable agreement higher than other similar studies. There is the possibility to improve these features by means of a continuous updating of the clinical diagnoses.
Grupos recurrentes de peces y crustáceos demersales en la zona centro-sur de Chile
Menares,Brunilda; Sepúlveda,José I;
Investigaciones marinas , 2005, DOI: 10.4067/S0717-71782005000100006
Abstract: the community structure of demersal fishes and crustaceans and its' relationship to hydrographic and bottom features was evaluated based on data from bio-oceanographic cruises made off the s-central chilean coast between 31o and 41os from 25 july to 01 september 1993. the shannon-weaver diversity index, sanders' similarity index, fager's ranking procedures, fager & mcgowan recurrent group analysis, and canonical correlation analysis were used for interpretations of the data. the area studied showed a faunal similarity composed of 35 species in common, with merluccius gayi and hippoglossina macrops as dominant species in the system. three associations of fishes and crustaceans were identified, including one distributed between the upper limit of the continental shelf and the bathyal zone, a second was limited to the edge of the continental shelf, and the third to the upper region of the slope. the recurrent groups were associated with subsurface equatorial water and antarctic intermediate water
Grupos recurrentes de peces y crustáceos demersales en la zona centro-sur de Chile Recurrent groups of demersal fishes and crustaceans of the south-central zone off Chile
Brunilda Menares,José I Sepúlveda
Investigaciones Marinas , 2005,
Abstract: Se estudia la estructura comunitaria de peces y crustáceos demersales, su relación con las condiciones hidrográficas, y el tipo de sustrato en áreas de pesca de Merluccius gayi, en la zona centro-sur de Chile (31o a 41oS) entre el 25 de julio y el 1 de septiembre de 1993. Con este propósito se calcularon los índices de diversidad (Shannon-Weaver), Similitud (Sanders), Grupos Recurrentes (Fager y McGowan), Importancia Relativa (Fager), y se realizó el Análisis de Correlación Canónica. El área de estudio presentó una similitud faunística constituida por 35 especies comunes, de las cuales Merluccius gayi e Hippoglossina macrops fueron las especies dominantes del sistema. Se reconoce tres asociaciones de fauna íctica y de crustáceos bentodemersales. Una se distribuye entre el límite de la plataforma continental y la zona batial; otra, restringida al límite de la plataforma continental y la tercera, en la zona del talud superior. Las asociaciones de los grupos recurrentes se encuentran asociadas a las Aguas Ecuatoriales Subsuperficiales y a la mezcla entre el Agua Ecuatorial Subsuperficial y el Agua Intermedia Antártica The community structure of demersal fishes and crustaceans and its' relationship to hydrographic and bottom features was evaluated based on data from bio-oceanographic cruises made off the S-central Chilean coast between 31o and 41oS from 25 July to 01 September 1993. The Shannon-Weaver diversity index, Sanders' similarity index, Fager's ranking procedures, Fager & McGowan recurrent group analysis, and Canonical Correlation Analysis were used for interpretations of the data. The area studied showed a faunal similarity composed of 35 species in common, with Merluccius gayi and Hippoglossina macrops as dominant species in the system. Three associations of fishes and crustaceans were identified, including one distributed between the upper limit of the continental shelf and the bathyal zone, a second was limited to the edge of the continental shelf, and the third to the upper region of the slope. The recurrent groups were associated with Subsurface Equatorial Water and Antarctic Intermediate Water
Importance of origin in rice purchasing decisions in Talca and Temuco, Chile
Schnettler,Berta; Ruiz,Danilo; Sepúlveda,Oriana; Sepúlveda,José; Denegri,Marianela;
Ciencia e investigación agraria , 2009, DOI: 10.4067/S0718-16202009000200008
Abstract: considering the increase in imports of forestry, farming and livestock products to chile, the existence of different consumer segments was evaluated according to the relative importance of origin in decisions to purchase rice in talca and temuco in central-southern chile. with this purpose, a direct survey was administered to 800 consumers, 400 in talca (maule region) and 400 in temuco (araucania region). using a conjoint analysis and hierarchical clustering, five market segments were distinguished. the largest group (35.4%) gave great importance to the origin of the rice. the second largest group (25.1%) gave greater relevance to the packaging. for the third and fourth largest groups (15.4 and 12.5%, respectively), the cost of the product was the most important attribute. the smallest group (11.6%) gave slightly higher importance to the origin of the rice than the other attributes. only this final group preferred imported rice. therefore, the results of this investigation make it possible to conclude that the origin of the rice is an important attribute for 47% of the consumers in talca and temuco, chile. the other groups based their purchase decisions on the price or the product packaging. the highest proportion of consumers (88.4%) preferred domestic rice.
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