Bone Biomechanics
Mostrando 13-24 de 34 artigos, teses e dissertações.
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13. Biomechanics and structural adaptations of the rat femur after hindlimb suspension and treadmill running
We microscopically and mechanically evaluated the femurs of rats subjected to hindlimb unloading (tail suspension) followed by treadmill training. Female Wistar rats were randomly divided into five groups containing 12-14 rats: control I (118 days old), control II (139 days old), suspended (tail suspension for 28 days), suspended-released (released for 21 da
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-04
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14. Administração de cloreto de mercúrio a ratas em desenvolvimento : efeitos sobre o tecido ósseo de ratas adultas de diferentes idades
The bone tissue is influenced by internal and external factors and heavy metals, as mercury, are examples of external or environmental factors. The mercury chloride (HgCl2) when absorbed by human body, deposits in the bone and fat tissue and dislocates bones and muscles minerals to circulation, being able to provoke illnesses. In this study, Wistar rats were
Publicado em: 2009
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15. Efeitos do acetato de chumbo em tecido ósseo de ratos
Lead is a ubiquitous pollutant in the environmental ecosystem which distribution is mainly anthropogenic, come from burning fossil fuels, mining and various industrial products. There is little knowledge of the involvement of this element on the bone metabolism. This study aimed to determine possible changes in adult rat bone, contaminated with lead acetate
Publicado em: 2009
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16. Avaliação da deformação gerada na região peri-implantar de prótese fixa implantossuportada, com a utilização de extensômetros lineares elétricos / Evaluation of peri-implant bone deformation of a mandibular cantilevered implant-supported prosthesis, with the use of strain gages
O comportamento mecânico das próteses parciais fixas implanto-suportadas são foco de vários estudos, onde o entendimento do processo de transmissão de forças mastigatórias e suas reações na estrutura óssea peri-implantar ainda não são totalmente compreendidos. Por isso, o objetivo deste trabalho foi verificar a deformação gerada na região peri
Publicado em: 2009
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17. Efeitos do cloreto mercúrico sobre o tecido ósseo de ratos
The mercury is used in the industry, medicine, agriculture and other fields. However, little is known about its involvement with the bone metabolism. The aim of this study was to evaluate the physical, biochemical and biomechanical bone parameters in adult rats contaminated with mercuric chloride during the development phase. The animals were separated as co
Publicado em: 2008
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18. Bone preservation: a tafonomic study of the human bones remains of the contry shell-mounds of the valley of the Ribeira de Iguape, SP / Preservação óssea: um estudo tafonômico dos remanescentes ósseos humanos dos sambaquis fluviais do vale do Ribeira de Iguape, SP
In Brazil, the archaeological sites known as "Sambaquis" - shell-mounds are geographically distributed in the coastal line and near by some rivers too. The taphonomic analyses are been applied to the study of the human bones recovered from the shell-mounds sites Capelinha, Moraes and Pavão XVI all them from the valley of the river Ribeira de Iguape, South o
Publicado em: 2008
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19. Study of the effect of pulsed electric field on bone healing in rats tibia / Estudo do efeito de campo elétrico pulsado no reparo ósseo em tíbia de ratos
The concept that electrical stimulation promotes the repair of fractures has a long history, dated of 1812. The mechanism for which electrical stimulation promotes osteogenesis is still subject of scientific speculation, however that method non-pharmacological, used in the present work has already showed positive effects in the promotion and incentive of ost
Publicado em: 2007
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20. Correlação eletromiografica e cefalometrica da biomecanica mandibular com o movimento mastigatorio predominante / Etectromyographic correlation and cephalometric of mandibular biomechanical with the predominant masticatory movement
The study of the craniomandibular biomechanics is related to the system of predominant lever and of the relation between function and mechanically induced deformations. This study has the purpose of evaluating the chewing muscular dynamics and correlating the chewing movement side that is more vertical and/or more horizontal set up by the photomeasurement Pl
Publicado em: 2007
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21. Biomechanics analysis of restored teeth with cast intra-radicular retainer, with and without ferrule / Análise biomecânica de dentes restaurados com retentor intra-radicular fundido, com e sem férula
The aim was to evaluate the influence of variations in the radicular ferrule format given by the casing core on stress developed in the root in a three-dimensional model of one upper second premolar submitted to four load conditions: wedge, vestibular lever, proximal lever and torsion. Six models were built according the average dimensions obtained from the
Publicado em: 2007
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22. Influence of the pilot hole preparation and screw frequency insertion of the implant on the insertion torque and pulling out resistance / Influência do preparo do orifício piloto e da freqüencia de colocação do implante no seu torque de inserção e resistência ao arrancamento
The aim of the study was to evaluate the influence of the diameter of the pilot hole and the frequency of screw placement on pullout out resistance and insertion torque of the pedicle screw. Pedicle screws of 5, 6 and 7mm of the USS system for vertebral fixation were inserted into wood, polyurethane, polyethylene and bovine bone. The pilot hole for screw ins
Publicado em: 2007
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23. O efeito da carga compressiva repetitiva sobre a placa de crescimento : estudo experimental em ratos / The effect of the Repetitives Impacts in Growth Plate : experimental Study in Rats
Os impactos repetitivos decorrentes do esporte podem interferir no crescimento ósseo. Com o objetivo de tentar elucidar o efeito mecânico dos impactos repetitivos sobre a placa de crescimento ósseo, da tíbia proximal, um estudo experimental em ratos foi realizado. Inicialmente, foi desenvolvida uma máquina para a produção de impactos repetitivos na t�
Publicado em: 2007
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24. Use of the sodium alendronate in rats submitted to plaster cast immobilization. Analysis of the mechanical properties of the femur and of the femoral neck radiographic density. / Uso de alendronato de sódio em ratas submetidas à imobilização gessada. Análise de propriedades mecânicas do fêmur e da densidade óssea radiográfica do colo femoral
A imobilização prolongada do aparelho locomotor, embora usada com finalidades terapêuticas, leva à osteopenia, o que causa enfraquecimento ósseo. Foi investigado se o uso concomitante do alendronato de sódio (um inibidor da atividade osteoclástica) é capaz de diminuir ou prevenir o enfraquecimento ósseo causado pela imobilização. Ratas fêmeas Wis
Publicado em: 2007