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Search Results: 1 - 10 of 4757 matches for " Veeck Elaine Bauer "
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Comparison among dental, skeletal and chronological development in HIV-positive children: a radiographic study
Holderbaum, Rejane Maria;Veeck, Elaine Bauer;Oliveira, Helena Willhelm;Silva, Carmem Lúcia;Fernandes, ?ngela;
Brazilian Oral Research , 2005, DOI: 10.1590/S1806-83242005000300010
Abstract: the goal of this study was to evaluate skeletal, dental and chronological development in an hiv-positive group of children, as compared with a control group, during a four-year period. panoramic radiographs and hand and wrist radiographs of 60 children were taken. the children, of both sexes, aged 5 years and 2 months to 15 years and 5 months, were selected as follows: 30 hiv-positive volunteers who had acquired the disease vertically, and 30 volunteers who did not present the hiv infection or any other systemic disease. all radiographs were technically standardized and analyzed according to criteria established by nolla (dental age), greulich and pyle (bone age), and ekl?f and ringertz (bone age). the results were submitted to student's t-test at a 5% level of significance. based on the comparison between the chronological age and the dental or the skeletal age, significant differences were observed between hiv-positive and hiv-negative children, both in 1999 and in 2003 (p < 0.05). considering the results obtained with the methodology used, it was concluded that hiv-positive children of both sexes presented delayed bone development despite the administration of antiretroviral drugs, and that hiv-positive female children presented younger dental ages compared with their chronological ages in 1999 and in 2003; and hiv-positive males, in 1999.
Influence of soft tissues on mandibular gray scale levels
Souza, Paulo Henrique Couto;Costa, Nilza Pereira da;Veeck, Elaine Bauer;
Brazilian Oral Research , 2004, DOI: 10.1590/S1806-83242004000100008
Abstract: the purpose of this study was to analyze the gray levels, expressed in pixels, of the mandibular retromolar region, with regard to the influence of muscular and fat soft tissues near this region. fifteen dry mandibles were x-rayed with the presence of soft tissue simulators. the radiographs were digitized and evaluated by digora? software. a one cm thick layer of wax was used as a simulator of the muscular soft tissue. animal fat samples of different thicknesses - 0.5, 1.0, 1.5 and 2.0 cm - were used as a simulator of the fat soft tissue. results showed that the fat soft tissue simulator influenced the gray level values in pixels of the mandibular retromolar region when analyzed in different thicknesses using the digora? digitized image software.
Measurement of the optical density of packable composites: comparison between direct and indirect digital systems
Graziottin, Luiz Felipe Rodrigues;Costa, Nilza Pereira da;Silveira, Ivori Dutra da;Veeck, Elaine Bauer;
Pesquisa Odontológica Brasileira , 2002, DOI: 10.1590/S1517-74912002000400004
Abstract: the aim of this study was to measure the optical density of four packable composite resins with widths of 1, 2, 3 and 4 mm, by means of digora? (direct) and dentscan dentview? (indirect) digital imaging systems, in order to compare both methods. twenty acrylic plates, with the proposed thicknesses, were used, each one containing a sample of each resin. each acrylic plate was radiographed three times, under a standardized technique. for the digora? system, an optical plate was used under each resin sample, and, for the dentscan dentview? system, occlusal films were employed, totalizing 60 exposures for each system. optical plates and films were scanned and three consecutive optical readouts were carried out, totalizing 1,440 readouts. the results were submitted to statistical analysis and revealed that the average optical density of the four resins always increased as thickness increased. regarding the comparisons between the composite resins, in both analysis the resin with the greater optical density was surefil? followed by prodigy? condensable, alert? and solitaire?. the correlations between the results of digora? and dentscan dentview? were significant for the different thicknesses and materials. the observed tendency is that as the values obtained with the digora? system increase, so do the values obtained with dentscan dentview?. while thickness increased, the values of optical density in both digora? and dentscan dentview? tended to approach each other. the digora? system presented smaller amplitude between the results obtained in adjacent thicknesses.
Avalia??o radiográfica da idade óssea em crian?as infectadas pelo HIV por via vertical
Oliveira, Helena Willhelm de;Veeck, Elaine Bauer;Souza, Paulo Henrique Couto;Fernandes, ?ngela;
Radiologia Brasileira , 2006, DOI: 10.1590/S0100-39842006000100007
Abstract: objective: to evaluate the development of children with vertically transmitted hiv infection by comparing two methods for bone age assessment. materials and methods: a total of 100 children aged between 4 years and two months and 11 years and 9 months were studied. the hands and wrists of the children were x-rayed using standard techniques and the films were subsequently analyzed according to the greulich & pyle (1959) and by ekl?f & ringertz (1967) methods. results: the results showed statistically significant differences between the two methods, with the ekl?f & ringertz method being distinguished by higher sensitivity (p < 0.05). in the group of female patients statistically significant differences were seen between control and hiv+ cases (seven cases) when assessed using this method (p < 0.05). conclusion: the study showed that hiv influenced skeletal development in this group of patients.
Measurement of the optical density of packable composites: comparison between direct and indirect digital systems
Graziottin Luiz Felipe Rodrigues,Costa Nilza Pereira da,Silveira Ivori Dutra da,Veeck Elaine Bauer
Pesquisa Odontológica Brasileira , 2002,
Abstract: The aim of this study was to measure the optical density of four packable composite resins with widths of 1, 2, 3 and 4 mm, by means of Digora (direct) and DentScan DentView (indirect) digital imaging systems, in order to compare both methods. Twenty acrylic plates, with the proposed thicknesses, were used, each one containing a sample of each resin. Each acrylic plate was radiographed three times, under a standardized technique. For the Digora system, an optical plate was used under each resin sample, and, for the DentScan DentView system, occlusal films were employed, totalizing 60 exposures for each system. Optical plates and films were scanned and three consecutive optical readouts were carried out, totalizing 1,440 readouts. The results were submitted to statistical analysis and revealed that the average optical density of the four resins always increased as thickness increased. Regarding the comparisons between the composite resins, in both analysis the resin with the greater optical density was SurefilTM followed by ProdigyTM Condensable, AlertTM and Solitaire . The correlations between the results of Digora and DentScan DentView were significant for the different thicknesses and materials. The observed tendency is that as the values obtained with the Digora system increase, so do the values obtained with DentScan DentView . While thickness increased, the values of optical density in both Digora and DentScan DentView tended to approach each other. The Digora system presented smaller amplitude between the results obtained in adjacent thicknesses.
Avalia o radiográfica da idade óssea em crian as infectadas pelo HIV por via vertical
Oliveira Helena Willhelm de,Veeck Elaine Bauer,Souza Paulo Henrique Couto,Fernandes ?ngela
Radiologia Brasileira , 2006,
Abstract: OBJETIVO: O presente trabalho teve por objetivo avaliar o desenvolvimento de crian as infectadas pelo vírus da imunodeficiência adquirida (HIV) por contamina o vertical, comparando-se dois métodos determinantes da idade óssea. MATERIAIS E MéTODOS: Analisou-se uma amostra de 100 crian as, com idades variando de 4 anos e 2 meses a 11 anos e 9 meses, que realizaram radiografias de m o e punho tecnicamente padronizadas e que, posteriormente, foram analisadas segundo os critérios dos métodos de Greulich e Pyle (1959) e de Ekl f e Ringertz (1967). RESULTADOS: Os resultados obtidos mostraram diferen as estatísticas entre os métodos de análise radiográfica do desenvolvimento esquelético utilizados, com destaque para a maior sensibilidade em rela o ao método de Ekl f e Ringertz (p < 0,05). O grupo feminino apresentou diferen as estatisticamente significantes entre os casos controle e HIV+ (sete casos) quando avaliados por este método (p < 0,05). CONCLUS O: Constatou-se, com a presente pesquisa, que houve a influência do HIV sobre o desenvolvimento esquelético neste grupo de pacientes.
Comparison of chemical composition of packable resin composites by scanning electron microscopy
Silva, Ana Amélia Bianchi e;Veeck, Elaine Bauer;Oliveira, José Pedro Peixoto de;Souza, Paulo Henrique Couto;
Journal of Applied Oral Science , 2005, DOI: 10.1590/S1678-77572005000100014
Abstract: objectives: the purpose of this study was to compare the chemical composition of four different shades (incisal/extra-light, a2, a3 and b3) of two packable resin composites (solitaire?, and prodigy condensabletm). methods and materials: the specimens measured 4mm in diameter and 4mm in thickness. five specimens were made for each shade of the materials. they were light cured for 40 seconds at a power of 600mw/cm2. subsequently, the specimens were removed from the plates and ground to powder and then pressed into holes measuring 4mm in diameter in a teflon matrix, using the plates of the same material as base and cover. specimens were evaluated under sem with an x-ray detector for the spectroscopic test by energy dispersing. results: the chemical components found in both materials were practically the same, but in different proportions. carbon, oxygen, aluminum, silica, fluoride and barium were found. conclusions: the chemical composition of each same material varied according to each shade analyzed.
Optical density and chemical composition of microfilled and microhybrid composite resins
Braun, Ana Paula;Grassi Soares, Clarissa;Glüer Carracho, Helena;Pereira da Costa, Nilza;Bauer Veeck, Elaine;
Journal of Applied Oral Science , 2008, DOI: 10.1590/S1678-77572008000200010
Abstract: this study evaluated the optical density of two microfilled and two microhybrid resins, as well as the composition of these materials with regard to their optical density. cavities prepared in 12 2-mm- or 4-mm-thick acrylic plastic plates were filled with z250 (3m-espe), a110 (3m-espe), charisma (heraeus-kulzer) and durafillvs (heraeus-kulzer). the resin increments (2-mm-thick) were light-cured for 40 s. three 0.12-s radiographic exposures were made of each #2 acrylic plastic plate. denoptix system optical plates were used to obtain the digital images. three readings of the composite resin surface were made in each radiograph, totalizing 216 readings. the mean of highest and lowest grey-scale values was obtained. two specimens of each composite resin were prepared for sem analysis of the chemical elements related to optical density, using energy dispersive x-ray analysis (edx). the results were subjected to shapiro-wilk's test, anova, tukey's test at 1% level of significance and pearson's correlation. the mean grey-scale values at 2 mm and 4 mm were: z250 = 154.27a and 185.33w; a110 = 46.77b and 63.05y; charisma = 163.40c and 200.46z; durafillvs = 43.92b and 58.99x, respectively. pearson's test did not show any positive correlation between optical density and percentage weight of optical density chemical elements. it was concluded that the microhybrid resins had higher optical density means than the microfilled resins; among the evaluated resins, charisma had the highest optical density means.
Seqüela após redu??o de fratura zigomática empregando fio de Kirschner: relato de caso
Vier, Fabiana Vieira;Marinho, Sandra Aparecida;Gabriel, Jo?o Guilherme;Costa, Nilza Pereira da;Veeck, Elaine Bauer;Warszawsky, Denise;
Radiologia Brasileira , 2005, DOI: 10.1590/S0100-39842005000200014
Abstract: in this study we present and discuss a case of a patient in which a kirschner wire was used for fixation of a fractured zygomatic bone. the kirschner wire was not removed after four weeks as recommended in the literature but only after behaving as foreign body.
Efeitos da radioterapia no tecido ósseo
Cunha, Samantha Seara Da;Sarmento, Viviane Almeida;Ramalho, Luciana Maria Pedreira;Freitas, André Carlos de;Almeida, Darcy de;Tavares, Maria Eulina;Souza, Jaílton Caetano;Veeck, Elaine Bauer;Costa, Nilza Pereira da;
Radiologia Brasileira , 2007, DOI: 10.1590/S0100-39842007000300011
Abstract: objective: to investigate the effects of radiotherapy on bone tissues and the accuracy of gray level measurements on radiographic images. materials and methods: four wistar rats were submitted to external radiotherapy (single 3000 cgy dose) on an area of 2 cm × 2 cm of their right legs. the animals were sacrificed six weeks after radiotherapy, and both irradiated and contralateral (non-irradiated) legs were removed, dissected, evaluated for thickness, x-rayed in a standardized form and histologically processed (stained with hematoxylin-eosin and picrosirius red). the radiographs were digitalized and the gray level average was measured with the imagetool? software. results: the femur thickness of non-irradiated legs was greater than that of the irradiated legs (p < 0.05). radiographically, the findings indicated a higher bone density in the non-irradiated legs, although with no statistically significant difference (p > 0.05). histological analysis of the irradiated legs demonstrated a decrease in the number of osteocytes and haversian canals, although with no statistically significance (p > 0.05). on the other hand, a significant increase in adipocytes was observed, resulting in a reduction of medullary tissue in the irradiated legs (p < 0.05), besides a higher osteoblastic activity in the non-irradiated legs (p < 0.05). conclusion: radiotherapy within the above mentioned parameters determined a decrease in activity of bone remodeling, which could be radiographically detected in the majority of the evaluated specimens.
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