Structural properties and resistance to bending at three points in the middle part of the diaphysis of the proximal phalanx of the horse´s manus
Abstract
Diseases of musculokeletal system produce disabilities in horses. Morfological study of the bone reflects the importance of providing biomechanical knowledge. The aims of this work were to determine the structural properties of the proximal phalanx of the finger of manus, and its relationship with the resistance to flexion at three points in different age groups in horses. The proximal phalanges of 10 creole mongrel horses were studied in two age groups, weight and length of the bone were taken, a transverse osteotomy was performed in the middle part of the diaphysis, and it was measured cortical thickness and areas.
The right proximal phalanx was subjected to a three point flexion test. The variables under study were subjected to descriptive and inferential statistical analyses. Differences are observed between areas, the total area is greater than the cortical area and the cortical area is greater than the medullary cavity (p <0,05). The total area depends on the weight of the bone (R²= 0,70, p =0,0026), 70% of the total área is explained by weight. The strength of the bone depends on the total área (R2= 0,77, p =0,0008), weight (R2= 0,73, p=0,0015) and age of animals, the olders horses showed greater resistance (p <0,05).
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