A resistência à compressão dos fixadores externos monoplanares em modelos de tíbias de poliuretano

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Background:The use of external fixators is one of the most used treatment for bone diseases specially in the tibia shaft fractures. The knowledge in mechanics is a condition to understand how to improve the use of such devices. Objective: This is an experimental study with the objective of analyses the increase of rigidity in synthetic tibia bones with external fixators. Methods: The external fixators were used in the monoplanar, half pin configuration submitted to an axial compression load using the connecting bar in different distances from the surface of the models. The experiment used 36 polyurethane models, cutted in the middle to simulated a diaphyseal instable fracture. The models were shared in 3 groups of 12, each group using different distances of 3, 5 and 7 centimeters. The study used the Instron testing machine which the models were submitted to the axial load until the fragments that were separated by a gap made full contact. Results: The analyses showed a statistical difference between the group 3 cm (p=0,0000089) and the others two (5 and 7cm) when the distance between the bar and the model were diminished. Conclusion: The connecting bar closer to the surface is more stable than the others to stand compression load.

ASSUNTO(S)

cirurgia tíbia fixadores externos

ACESSO AO ARTIGO

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