RESUMO
Background: Circular external skeletal fixator Ilizarov is a fixation method widely used to stabilize fractures. The method is performed using several components but the ring stands out as the fundamental component of this device, and compression loads in the same plane of the ring are mainly due to the wires connected from one side to another of the implant. The axial load is reached on the rings with a proper tension distractor device connected to the wires and fixed with bolts, washers and nuts during surgical procedure. Additional loads to axial tension are employed during patient`s physical activities after surgery. The study aimed to compare the resistance to axial compression load and analyze the alloy composition of the Ilizarov rings with different diameter sizes and alloys. Materials, Methods & Results: We tested two diameters of rings acquired from three manufacturers for mechanical axial compression. Manufacture sample (N = 30 rings of each trademark) was divided into two groups (60 and 80 diameter mm). The tests to evaluate strength and deformation parameters were performed in a universal testing machine Kratos ® 3.000 MP KE model, equipped with a load cell of 3000 N with test speed of 10 mm per minute. We also evaluated the elemental alloy composition by the method of the TTPIXE (Thick Target Proton Induced X-Ray Emission) in external PIXE...
Assuntos
Animais , Cães , Fenômenos Biomecânicos , Fixadores Externos/veterinária , Suporte de Carga , Técnica de Ilizarov/veterináriaRESUMO
Background: Circular external skeletal fixator Ilizarov is a fixation method widely used to stabilize fractures. The method is performed using several components but the ring stands out as the fundamental component of this device, and compression loads in the same plane of the ring are mainly due to the wires connected from one side to another of the implant. The axial load is reached on the rings with a proper tension distractor device connected to the wires and fixed with bolts, washers and nuts during surgical procedure. Additional loads to axial tension are employed during patient`s physical activities after surgery. The study aimed to compare the resistance to axial compression load and analyze the alloy composition of the Ilizarov rings with different diameter sizes and alloys. Materials, Methods & Results: We tested two diameters of rings acquired from three manufacturers for mechanical axial compression. Manufacture sample (N = 30 rings of each trademark) was divided into two groups (60 and 80 diameter mm). The tests to evaluate strength and deformation parameters were performed in a universal testing machine Kratos ® 3.000 MP KE model, equipped with a load cell of 3000 N with test speed of 10 mm per minute. We also evaluated the elemental alloy composition by the method of the TTPIXE (Thick Target Proton Induced X-Ray Emission) in external PIXE...(AU)
Assuntos
Animais , Cães , Fixadores Externos/veterinária , Suporte de Carga , Fenômenos Biomecânicos , Técnica de Ilizarov/veterináriaRESUMO
O terceiro osso metacarpiano equino é uma região de particular interesse devido ao grande número de lesões a que está sujeito. Assim, justifica-se o estudo detalhado da sua estrutura anatômica, dimensões e composição elementar para o aprimoramento de técnicas de diagnóstico, tratamento e prevenção de lesões. Neste trabalho,foi estudada a composição macroelementar óssea de 30 pares de osso terceiro metacarpiano equino e sua relação com a idade, sexo, peso, raça, alimentação e atividade dos animais. As concentrações médias de cálcio e fósforo das amostras foram 205 ± 62 mg/g e 97 ± 32 mg/g, respectivamente. A relação [Ca]/[P] encontrada foi de 2,12 ± 0,13, indicando que a proporção entre o cálcio e fósforo no tecido ósseo é constante e aproximadamente igual à razão 2:1. A análise estatística dos dados mostrou normalidade para todo o conjunto de medidas. A avaliação entre os animais com atividade física intensa e os animais com atividade física leve, em que a quantidade de material mineralizado para o primeiro e segundo conjuntos são, respectivamente, [Ca] = 222 ± 57 mg/g e [Ca] = 179 ± 47 mg/g, evidenciou a existência de correlação estatística entre o depósito de material mineral e a função exercida pelos animais. Para as demais características, não foram verificadas evidências estatísticas de inter-relações. Tais achados serão subsídios para estudos posteriores acerca de possíveis correlações com enfermidades de origem fisiológica ou nutricional frente à casuística de fraturas e outras afecções comuns ao aparelho locomotor equino.
The equine third metacarpal bone has been seen as a region of particular interest due to the large number of injuries to which it is subject. Thus, the detailed study of its anatomical structure, size and elemental composition is justified for the improvement of diagnostic techniques, treatment and prevention of injuries. In this work it has been studied the macro elemental composition of 30 pairs of equine third metacarpal bone and its relation with age, sex, weight, breed, nutrition and activity of animals. The average concentrations of calcium and phosphorus of the samples were 205 ± 62 mg/g and 97 ± 32 mg/g, respectively. The ratio [Ca] / [P] was found to be 2.12 ± 0.13, indicating that the ratio of calcium and phosphorus in bone tissue is constant and approximately equal to the ratio 2:1. The statistical analysis showed normal values for the entire set of measurements. In the evaluation of the animals with intense physical activity, and animals with light physical activity, it was found that the amount of mineralized material for the first and second sets respectively ([Ca] = 222 ± 57 mg/g [Ca] = 179 ± 47 mg/g), showing the existence of statistical correlation between the deposit of mineral material and the function performed by the animals. For the other characteristics were not found statistical evidence of correlations. These findings will be input for further studies of possible correlations with diseases of nutritional origin or physiological outside the series of fractures and other disease common to the equine locomotor system.
Assuntos
Animais , Cavalos/classificação , Ferimentos e Lesões/veterinária , Metacarpo/anatomia & histologia , Minerais , Osso e Ossos/anatomia & histologiaRESUMO
O terceiro osso metacarpiano equino é uma região de particular interesse devido ao grande número de lesões a que está sujeito. Assim, justifica-se o estudo detalhado da sua estrutura anatômica, dimensões e composição elementar para o aprimoramento de técnicas de diagnóstico, tratamento e prevenção de lesões. Neste trabalho,foi estudada a composição macroelementar óssea de 30 pares de osso terceiro metacarpiano equino e sua relação com a idade, sexo, peso, raça, alimentação e atividade dos animais. As concentrações médias de cálcio e fósforo das amostras foram 205 ± 62 mg/g e 97 ± 32 mg/g, respectivamente. A relação [Ca]/[P] encontrada foi de 2,12 ± 0,13, indicando que a proporção entre o cálcio e fósforo no tecido ósseo é constante e aproximadamente igual à razão 2:1. A análise estatística dos dados mostrou normalidade para todo o conjunto de medidas. A avaliação entre os animais com atividade física intensa e os animais com atividade física leve, em que a quantidade de material mineralizado para o primeiro e segundo conjuntos são, respectivamente, [Ca] = 222 ± 57 mg/g e [Ca] = 179 ± 47 mg/g, evidenciou a existência de correlação estatística entre o depósito de material mineral e a função exercida pelos animais. Para as demais características, não foram verificadas evidências estatísticas de inter-relações. Tais achados serão subsídios para estudos posteriores acerca de possíveis correlações com enfermidades de origem fisiológica ou nutricional frente à casuística de fraturas e outras afecções comuns ao aparelho locomotor equino.(AU)
The equine third metacarpal bone has been seen as a region of particular interest due to the large number of injuries to which it is subject. Thus, the detailed study of its anatomical structure, size and elemental composition is justified for the improvement of diagnostic techniques, treatment and prevention of injuries. In this work it has been studied the macro elemental composition of 30 pairs of equine third metacarpal bone and its relation with age, sex, weight, breed, nutrition and activity of animals. The average concentrations of calcium and phosphorus of the samples were 205 ± 62 mg/g and 97 ± 32 mg/g, respectively. The ratio [Ca] / [P] was found to be 2.12 ± 0.13, indicating that the ratio of calcium and phosphorus in bone tissue is constant and approximately equal to the ratio 2:1. The statistical analysis showed normal values for the entire set of measurements. In the evaluation of the animals with intense physical activity, and animals with light physical activity, it was found that the amount of mineralized material for the first and second sets respectively ([Ca] = 222 ± 57 mg/g [Ca] = 179 ± 47 mg/g), showing the existence of statistical correlation between the deposit of mineral material and the function performed by the animals. For the other characteristics were not found statistical evidence of correlations. These findings will be input for further studies of possible correlations with diseases of nutritional origin or physiological outside the series of fractures and other disease common to the equine locomotor system.(AU)