Mechanical evaluation of bone gap filled with rigid formulations castor oil polyurethane and chitosan in horses
| Autor: | César Augusto Martins Pereira, Guilherme Maia Mulder van de Graaf, Rodrigo Crispim Moreira, André Luis do Valle de Zoppa |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
010407 polymers medicine.medical_specialty Materials science medicine.medical_treatment Strain (injury) Bone tissue 01 natural sciences lcsh:Agriculture 03 medical and health sciences chemistry.chemical_compound strenght medicine lcsh:Agriculture (General) Composite material Reduction (orthopedic surgery) Polyurethane Fixation (histology) equine BIOMATERIAIS 030102 biochemistry & molecular biology General Veterinary lcsh:S biomaterial medicine.disease lcsh:S1-972 0104 chemical sciences Surgery medicine.anatomical_structure chemistry fracture Castor oil Third metacarpal bone Animal Science and Zoology Deformation (engineering) biomechanical test Agronomy and Crop Science medicine.drug |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Ciência Rural v.46 n.12 2016 Ciência Rural Universidade Federal de Santa Maria (UFSM) instacron:UFSM Ciência Rural, Vol 46, Iss 12, Pp 2182-2188 |
| Popis: | Often fractures of long bones in horses are comminuted and form bone gaps, which represent a major challenge for the fixation of these fractures by loss of contact between the fragments. Bone grafts help in treating this kind of fracture and synthetic materials have been gaining ground because of the limitations of autologous and heterologous grafts. In this study were performed compressive non destructive test in 10 bones with complete cross-bone gap in mid-diaphyseal of the third metacarpal bone of horses. Using a mechanism of "crossing" the 10 bones were used in the three groups (control, castor oil poliuretane and chitosan) according to the filling material. After the test with maximum load of 1000N bone had a gap filled by another material and the test was repeated. Deformations caused on the whole bone, plate and bone tissue near and distant of gap were evaluated, using strain gauges adhered to the surface at these locations. There was a reduction in bone deformation from 14% (control) to 3,5% and 4,8% by filling the gap with Chitosan and castor oil respectively, and a reduction of strain on the plate of 96% and 85% by filling gap with chitosan and castor respectively. An increase in intensity and direction of deformations occurred in bone near to gap after its filling; however, there was no difference in bone deformations occurring far the gap. |
| Databáze: | OpenAIRE |
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