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Search Results: 1 - 10 of 40427 matches for " Jorge Alberto Arismendi "
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Estudio del desempe?o preclínico y clínico de una amalgama dental comercial
Gómez Tabares,Carlos Arturo; Arismendi Echavarría,Jorge Alberto;
Revista Facultad de Odontología Universidad de Antioquia , 2010,
Abstract: introduction: silver amalgam is a dental material which is used in restorative clinical dentistry for posterior teeth. the purpose of this study was to evaluate the preclinical performance of the nu alloy dp? dental amalgam in plastic teeth, and, then to evaluate the clinical performance of the restorative material after eighteen months of being placed in the mouth. methods: 153 nu alloy dp? dental amalgam restorations were made in the preclinical phase and the dentists′ perception was recorded. subsequently 306 restorations were made in patients in order to evaluate the clinical performance of the restorative material. results: a good evaluation was reported by the dentists in the preclinical study regarding the following variables: cohesion, carving, burnishing and polishing, with favorable answer percentages between 68% and 86%. ninety two restorations were examined at the end of the clinical study with following results: excellent evaluation for oclusal wear, cohesive failure of the material, and radiographic evaluation variables; and good evaluation for marginal integrity, surface texture and discoloration variables. conclusions: good performance results were obtained with nu alloy dp? dental amalgam in the preclinical phase which are reflected subsequently in the clinical evaluation results. the results found in the evaluation at eighteen months allowed us to conclude that the clinical performance was excellent. dental amalgam requires maintenance appointments in order to carry out its polishing every six months and to keep its surface texture and brightness which were obtained in the first appointments.
Estudio del desempe o preclínico y clínico de una amalgama dental comercial Preclinical and clinical evaluation of a commercial dental amalgam
Carlos Arturo Gómez Tabares,Jorge Alberto Arismendi Echavarría
Revista Facultad de Odontología Universidad de Antioquia , 2010,
Abstract: INTRODUCCIóN: la amalgama de plata es un material restaurador para uso en dientes posteriores. El propósito de este estudio fue observar las características de trabajo de la amalgama dental Nu Alloy dp en dientes de ivorina y, posteriormente, evaluar algunas cualidades clínicas de este material restaurador, dieciocho meses después de ser colocado en boca. MéTODOS: se realizaron 153 restauraciones de amalgama dental Nu Alloy dp en dientes de ivorina en el laboratorio y se registró la percepción de los odontólogos. Posteriormente se realizaron 306 obturaciones en pacientes para evaluar el comportamiento clínico del material restaurador. RESULTADOS: en el estudio de laboratorio se reportó una evaluación buena de los odontólogos para las variables condensación, tallado, bru ido y pulido con porcentajes de respuesta favorables entre el 68 y 86%. En el estudio clínico se revisaron 92 obturaciones al final del estudio, dieciocho meses de seguimiento, con los siguientes resultados: evaluación excelente para las variables desgaste oclusal, falla cohesiva y evaluación radiográfica; buena valoración para las variables de integridad marginal, textura superficial y decoloración. CONCLUSIONES: de la fase de laboratorio se puede decir que la amalgama dental Nu Alloy dp presentó buena valoración de sus características de manipulación, las cuales se reflejan posteriormente en los resultados obtenidos en la evaluación clínica. Con los resultados encontrados en la revisión clínica a dieciocho meses se concluye que el comportamiento clínico de la amalgama fue excelente. INTRODUCTION: silver amalgam is a dental material which is used in restorative clinical dentistry for posterior teeth. The purpose of this study was to evaluate the preclinical performance of the Nu Alloy dp dental amalgam in plastic teeth, and, then to evaluate the clinical performance of the restorative material after eighteen months of being placed in the mouth. METHODS: 153 Nu Alloy dp dental amalgam restorations were made in the preclinical phase and the dentists′ perception was recorded. Subsequently 306 restorations were made in patients in order to evaluate the clinical performance of the restorative material. RESULTS: a good evaluation was reported by the dentists in the preclinical study regarding the following variables: cohesion, carving, burnishing and polishing, with favorable answer percentages between 68% and 86%. Ninety two restorations were examined at the end of the clinical study with following results: excellent evaluation for oclusal wear, cohesive failure of the material, and rad
Implantes cortos. Reporte de 30 implantes: Parte I: oseointegración
Arismendi,Jorge Alberto; Cabrales,Manuel; Duque,Jaiver Andrés; Casta?eda,Wilmer;
Revista Facultad de Odontología Universidad de Antioquia , 2011,
Abstract: introduction: the purpose of this clinical report is to present the collected results with an implant system that modifies the classical protocol regarding drilling speed, use of irrigation, native bone collecting and prosthetic options including crown integrated to the abutment, extraoral cementing of the crown and universal position of abutment screw. regarding implant design, it′s important to highlight the use of short implants, with reduced platform, lateral wings instead of screw threads, abutment connection by means of friction and modified implant surface. methods: 30 bicon? implants, all six-mm of length, were placed in order to perform single tooth restorations in 22 patients. the surgical protocol was performed according to indications of the manufacturer in two surgical stages. the implants were uncovered and all metal-ceramic crowns were cemented. results: the percentage of osseointegration success was 100% at the time of uncovering, without pain or mobility during function, no signs of infection and healthy appearance of peri-implant tissues. there were no radiographic changes at the x-ray evaluation. conclusion: considering the limitations of this study, it can be concluded that with the modified surgical protocol and the structural design of the bicon? implant (bicontmdental implants, boston, ma) a 100% osseointegration success was achieved on 30 implants with modified surface and reduced platform, placed in different areas of the oral cavity for single-tooth restoration.
Carga inmediata sobre implante único: estudio clínico prospectivo
Arango,Paola Andrea; Porras,Andrés Felipe; Arismendi E,Jorge Alberto;
Revista Facultad de Odontología Universidad de Antioquia , 2009,
Abstract: introduction: immediate loading of implants has become a viable treatment alternative that offers multiple benefits for patients such as providing immediate function and esthetics, reduction of surgical trauma and less treatment time. a controlled prospective clinical trial was conducted to evaluate the success of immediately loaded implants for single-tooth restoration following consensus protocols in recent literature. methods: twenty-one 3.75 x 13mm rbm-treated surface internal connection implants (renova?, lifecore biomedical inc., chaska mn. ) were placed in 17 systemically healthy patients (6 males, 11 females), ages between 18 and 74 years who required single-tooth replacement in the anterior and premolar regions of both jaws. results: the 18-month cumulative success rate for this study was 95.2%. according to the statistical analysis in this study, immediate loading of implants for single-tooth restoration compares favorably to the two-stage protocol and a direct correlation between the distance from bone to contact point and papilla filling was found. conclusions: results from the present study indicate that the single-tooth restoration in the anterior area with immediately loaded surface-treated threaded titanium implants and no occlusal function is a viable treatment alternative with a success rate greater than 95%, comparable to the conventional loading protocol.
Carga inmediata sobre implante único: estudio clínico prospectivo Immediate load in single-tooth restorations: a clinical prospective study
Paola Andrea Arango,Andrés Felipe Porras,Jorge Alberto Arismendi E
Revista Facultad de Odontología Universidad de Antioquia , 2009,
Abstract: INTRODUCCIóN: la carga inmediata se ha convertido en una alternativa viable de tratamiento que ofrece múltiples beneficios a los pacientes como funcióacute;n y estética inmediata, reducción del trauma quirúrgico y disminución del tiempo total de tratamiento. Se hizo un estudio prospectivo controlado para la colocación de implantes en casos clínicos de restauración de diente único que recogiese el consenso propuesto en la literatura para evaluar el éxito clínico bajo el protocolo de carga inmediata: implantes de conexión interna, cónicos, de superficie texturizada y un mínimo de 32 Ncm de torque inicial. MéTODOS: se colocaron 21 implantes Renova (Lifecore Biomedical Inc., Chaska, MN ) en 17 pacientes adultos (6 hombres y 11 mujeres) rango de edad entre 18 y 74 a os, sistémicamente sanos con necesidad de reemplazo de diente único en sectores anterior y premolar de ambos maxilares. RESULTADOS: la tasa de éxito acumulativa a 18 meses fue de 95,2%. Se obtuvieron valores de íxito similares a los reportados con el protocolo de carga convencional y se encontró correlación directa entre la distancia desde el hueso al punto de contacto y el porcentaje de presencia de papila en el espacio interproximal. CONCLUSIóN: los resultados indican que el protocolo de carga inmediata para el tratamiento de restauraciones de diente único en la zona anterior mediante implantes temporalizados inmediatamente, sin función oclusal, es una alternativa viable con tasas de éxitos mayores al 95%, comparables a las logradas con el protocolo de carga convencional. INTRODUCTION: immediate loading of implants has become a viable treatment alternative that offers multiple benefits for patients such as providing immediate function and esthetics, reduction of surgical trauma and less treatment time. A controlled prospective clinical trial was conducted to evaluate the success of immediately loaded implants for single-tooth restoration following consensus protocols in recent literature. METHODS: twenty-one 3.75 x 13mm RBM-treated surface internal connection implants (Renova , Lifecore Biomedical Inc., Chaska Mn. ) were placed in 17 systemically healthy patients (6 males, 11 females), ages between 18 and 74 years who required single-tooth replacement in the anterior and premolar regions of both jaws. RESULTS: the 18-month cumulative success rate for this study was 95.2%. According to the statistical analysis in this study, immediate loading of implants for single-tooth restoration compares favorably to the two-stage protocol and a direct correlation between the distance from bone to contact p
Estudio comparativo de implantes de superficie lisa y rugosa: Resultados a 36 meses Machined versus rough surface implants, a clinical study: 36-month follow-up
Jorge Alberto Arismendi,Ana Lucía Mesa,Luz Piedad García,Juan Fernando Salgado
Revista Facultad de Odontología Universidad de Antioquia , 2010,
Abstract: INTRODUCCIóN: la estabilidad primaria es esencial para una oseointegración ideal y depende de las características micro- y macroscópicas del implante. Las características superficiales de un implante influyen de manera importante en la respuesta clínica en términos de oseointegración y sus resultados deben evaluarse a largo plazo. En la literatura se discute sobre los beneficios de utilizar implantes de superficie rugosa para mejorar la oseointegración. El objetivo de este estudio fue evaluar la oseointegración de dos grupos de implantes, uno de superficie lisa o maquinada y otro de superficie rugosa o modificada. MéTODOS: se efectuó seguimiento clínico y radiográfico a 12, 24 y 36 meses a dos grupos de implantes de conexión externa, tipo tornillo, de la casa comercial Lifecore , uno con 30 implantes de superficie lisa (SuperCAT ) y otro con 30 implantes de superficie rugosa (RBM ). Las mediciones a 12, 24 y 36 meses de función fueron comparadas entre sí para determinar el comportamiento de la cresta ósea marginal utilizando la plataforma del implante como referencia. RESULTADOS: en los implantes de superficie lisa a los 24 y 36 meses, la pérdida promedio de altura de la cresta ósea fue 1,5mm. En los implantes de superficie rugosa a los 24 meses la pérdida ósea promedio fue 1,4mm, y a los 36 meses fue 1,5mm en promedio. CONCLUSIONES: el seguimiento clínico y radiográfico de dos grupos de implantes con superficies diferentes no presentó diferencias estadísticamente significativas en cuanto a las variables evaluadas, para casos de restauración de diente único sobre implantes. INTRODUCTION: the implant surface affects the clinical response in terms of osseointegration and should be evaluated in the long term. In the last years, literature has strongly recommended the use of modified surface implants, in order to improve osseointegration. The primary stability is essential to obtain osseointegration and it depends on the micro and macro characteristics of the implant and bone structure. The usage of active surfaces is an advantage, but it does not modify the bone density. The aim of this study is to undertake a clinical and radiographic evaluation between two different groups of implants, machined versus modified surfaces. METHODS: a 24 to 36 months clinical and radiographic follow-up was done to two groups of Lifecore implants, one group with 30 machined implants (Super CAT ), and the other one with 30 modified surface (RBM ) external hex connection and screw type implants. Measurements were taken to determine the bone crest behavior using the implant pla
Comparación clínica y radiográfica del efecto del péndulo con anclaje esquelético vs. dentoalveolar Clinical and radiographic comparison of the pendulum effect with skeletal anchorage versus dentoalveolar anchorage
Sandra Liliana Gómez Gómez,John Jairo Betancur Pérez,Jorge Alberto Arismendi,Jorge Humberto Gil Cardona
Revista Facultad de Odontología Universidad de Antioquia , 2012,
Abstract: INTRODUCCIóN: este estudio pretende comparar clínica y radiográficamente los efectos producidos por el distalizador péndulo en dos formas de anclaje: esquelético y dentoalveolar, en pacientes con maloclusiones clase II de la Facultad de Odontología de la Universidad de Antioquia. MéTODOS: se hizo un estudio preexperimental comparativo. Se utilizó una muestra de 19 pacientes con edades entre los 15 y 26 a os, divididos en dos grupos: 9 pacientes tratados con péndulo de anclaje esquelético y 10 con péndulo de anclaje dentoalveolar. A todos los pacientes se les tomaron radiografías cefálicas laterales y modelos de estudio, al inicio y al final del tiempo de evaluación (6 meses). RESULTADOS: los resultados clínicos y radiográficos muestran diferencias significativas en los efectos producidos a nivel de incisivos y molares. El péndulo con anclaje dentoalveolar presentó en promedio proinclinación de los incisivos de 4°, mientras que el péndulo con anclaje esquelético no mostró variación. En cuanto al efecto producido en los molares se observó mayor cantidad de distalación por inclinación (14,1°) en el péndulo con anclaje dentoalveolar que en el péndulo con anclaje esquelético (7,34°). CONCLUSIONES: el péndulo bajo las dos modalidades de anclaje mostró ser un dispositivo eficaz para distalar molares, sin embargo es importante tener en cuenta el efecto que se quiere producir sobre los incisivos, pues cada uno produce resultados diferentes. INTRODUCTION: This study seeks to clinically and radiographically compare the effects produced by the distalization pendulum in both skeletal and dentoalveolar anchorage, in patients with Class II malocclusions at the Universidad de Antioquia's School of Dentistry METHODS: a pre-experimental comparative study was carried out on a sample of 19 patients aged 15-26 years, divided into two groups: 9 patients treated with bone anchorage pendulum and 10 with dentoalveolar anchorage pendulum. Lateral cephalic radiographs of each patient were taken and study models were done at the beginning and the end of evaluation period (6 months). RESULTS: both clinical and radiographic results show significant differences in the effects produced at the incisors and molars. The pendulum with dentoalveolar anchorage presented an average incisor proclination of 4°, while the pendulum with skeletal anchorage showed no variation. Concerning the effect produced in molars, a greater amount of distalization as a result of inclination was observed in the pendulum with dentoalveolar anchorage (14.1°) in comparison to the one with skeletal anchorage (7.34
Estudio comparativo de implantes de superficie lisa y rugosa: Resultados a 36 meses
Arismendi,Jorge Alberto; Mesa,Ana Lucía; García,Luz Piedad; Salgado,Juan Fernando; Casta?o,Catalina; Mejía,Richard;
Revista Facultad de Odontología Universidad de Antioquia , 2010,
Abstract: introduction: the implant surface affects the clinical response in terms of osseointegration and should be evaluated in the long term. in the last years, literature has strongly recommended the use of modified surface implants, in order to improve osseointegration. the primary stability is essential to obtain osseointegration and it depends on the micro and macro characteristics of the implant and bone structure. the usage of active surfaces is an advantage, but it does not modify the bone density. the aim of this study is to undertake a clinical and radiographic evaluation between two different groups of implants, machined versus modified surfaces. methods: a 24 to 36 months clinical and radiographic follow-up was done to two groups of lifecore? implants, one group with 30 machined implants (super cat?), and the other one with 30 modified surface (rbm?) external hex connection and screw type implants. measurements were taken to determine the bone crest behavior using the implant platform as reference at 24-36 months of function and were compared with the 12 months measurements. results: in machined implants at 24-36 months, the average marginal bone loss was 1.5 mm. in modified surface implants at 24 months, the average marginal bone loss was 1.4 mm, and at 36 months, the loss was 1.5 mm. conclusions: there are no statistical significant differences between the two groups of machined and modified implant surface, for single tooth restoration, as it relates to clinical and radiographic follow up.
Southern Chile, trout and salmon country: invasion patterns and threats for native species Sur de Chile, país de truchas y salmones: patrones de invasión y amenazas para las especies nativas
DORIS SOTO,IVáN ARISMENDI,JORGE GONZáLEZ,JOSé SANZANA
Revista chilena de historia natural , 2006,
Abstract: In order to evaluate the present distribution patterns of salmonids and their potential effects on native fish, we sampled 11 large lakes and 105 streams, encompassing a total of 13 main hydrographic watersheds of southern Chile (39° to 52°S). Overall, trout (Salmo trutta and Oncorhynchus mykiss) accounted for more than 60 % of total fish abundance and more than 80 % of total biomass, while 40 % of the streams sampled did not have native fish. Salmon, introduced for aquaculture, such as O. kisutch, Salmo salar, and O. tshawytscha, were only present in lakes with salmon farming and did not seem to be reproducing naturally in affluent streams. We tested the effect of river geographic origin (Andes mountains, central valley, or Coastal range) on fish abundance and found that rainbow trout was more restricted to the Andean streams with higher water discharge, while brown trout was widely distributed and did not relate to any of several catchment attributes measured. The abundance of native fish was greater in lakes than in streams and the highest native fish biodiversity occurred in streams of the central valley. The most common native species were Galaxias maculatus, G. platei, Brachygalaxias bullocki, Aplochiton zebra and Basilichthys australis. Streams with higher conductivity, larger pool areas, more fine sediments, and low brown trout densities were more suitable for native fish. Thus, catchments with higher anthropogenic disturbance appeared as refuges for native species. Given the descriptive nature of our study we can only presume the negative impacts of trout and salmon on native fish; an effect which should be superimposed on biogeographical conditioning of present distribution. Yet based on the present abundance and distribution patterns of salmonids and native fish, negative effects are very likely. Conservation of native fish biodiversity in central valley streams, far from protected areas or national parks and fully exposed to human perturbations represents a great challenge. We propose to enhance conservation by exerting a stronger sport fishing pressure on trout in those streams Para evaluar la distribución y abundancia actual de salmónidos y peces nativos muestreamos 11 lagos grandes y 105 arroyos, cubriendo 13 cuencas principales en el sur de Chile desde 39° a 52°S. En general las truchas (Salmo trutta y Oncorhynchus mykiss) representaron más de 60 % de la abundancia total de peces y más de 80 % de la biomasa total, además 40 % de los arroyos muestreados no presentaron peces nativos. Los salmones traídos para acuicultura tales como O. kisut
Reading Comprehension in Face-to-Face and Web-Based Modalities: Graduate Students' Use of Reading and Language Learning Strategies in EFL
Arismendi Gómez,Fabio Alberto; Colorado López,Doris; Grajales Marin,Luisa Fernanda;
Colombian Applied Linguistics Journal , 2011,
Abstract: few studies in colombia have explored and compared students' reading comprehension processes in efl, in different modalities of instruction. this article reports on some findings of a larger study in which two groups of graduate law students took a reading comprehension course in english, delivered in two different modalities of instruction: face-to-face and web-based. both courses were served by an english teacher from the school of languages at universidad de antioquia. the data gathered from class observations, in-depth interviews, questionnaires, tests, the teacher's journal and data records in the platform provided insights about the students' use of reading and language learning strategies in both modalities. findings suggest that students applied the reading strategies explicitly taught during the courses and some language learning strategies for which they did not receive any instruction.
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