SciELO - Scientific Electronic Library Online

 
vol.46 issue12Occurrence of eggs and oocysts of gastrointestinal parasites in passerine birds kept in captivity in Para State, BrazilGlucose and lipid profile of obese dogs fed with different starchy sources author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Ciência Rural

On-line version ISSN 1678-4596

Abstract

MOREIRA, Rodrigo Crispim; GRAAF, Guilherme Maia Mulder Van De; PEREIRA, César Augusto  and  ZOPPA, André Luis do Valle De. Mechanical evaluation of bone gap filled with rigid formulations castor oil polyurethane and chitosan in horses. Cienc. Rural [online]. 2016, vol.46, n.12, pp.2182-2188. ISSN 1678-4596.  http://dx.doi.org/10.1590/0103-8478cr20150838.

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.

Keywords : equine; fracture; biomaterial; strenght; biomechanical test.

        · abstract in Portuguese     · text in English     · English ( pdf )