Subprodutos da fresagem femoral ou osso esponjoso autógeno na osteossíntese femoral com hastes bloqueadas em cães

Abstract

The aim of this research was to evaluate the interlocking nails technique in femoral fractures in dogs and evaluate the use of femoral intramedullary reaming byproducts as an adjuvant to bone healing. Twelve dogs, weighing between 15 and 18 kg, were randomly distributed in three groups according to the type of graft used in the fracture denominated I (control- untreated), II (the byproducts of femoral intramedullary reaming) and III(autogenous cancellous bone). Transverse osteotomy was performed in the middle portion of the femur and posterior osteosynthesis with inrelocking nails. After was carried out the grafting with by-products of intramedullary reaming or autogenous cancellous bone in sufficient quantity to fill the surface of the fracture. In order to compare the performance of the groups treatment were performed radiographic evaluations at 15, 30, 60 and 90 days postoperatively (PO), and clinical evaluation of the daily march up to the 7th postoperative day, and after weekly until the 60th days after surgery. The radiographic analysis revealed that at 30 postoperatively day the mean scores of consolidation in the dogs of the group that received grafts of intramedullary reaming by-products were higher than the other groups. At 45 and 60 postoperative days radiographic images also indicated the superiority of group II in relation to other groups. Clinical evaluation of the march on the 15th postoperative day showed the best performance of the dogs treated with grafting of femoral reaming by-products. 75% of these animals were in grade V of lameness. There was no statistical difference between the grafting of femoral intramedullary reaming byproducts and autogenous cancellous bone in relation to radiographic consolidation scores and degrees of lameness, at different times after surgery. The interlocking nails were considered an efficient method for osteosynthesis of femoral diaphyseal fractures in dogs, without alterations or inconvenience in postoperative period. The grafting of femoral intramedullary reaming byproducts proved to be a viable and effective adjuvant in healing bone fractures of long bones of dogs and we recommend this technique to be evaluated in dogs from traumatic fractures.