Osso esponjoso autógeno ou homógeno conservado em glicerina a 98% na artrodese atlantoaxial em cães

Abstract

The aim of this research was to test and to compare the homogenous cancellous bone glycerin-stored with the autogenous cancellous bone graft in the atlantoaxial arthrodesis. Fifteen dogs, weighing between 8 and 12 kg, were randomly distributed in three groups denominated one (30 days), two (60 days) and three (90 days). The atlantoaxial joint was immobilized through the ventral access using Steinmann pins associated the acrylic resin. A defect was created in the right hemi-joint atlantoaxial and put 100mg of the homogenous implant and, in the left hemi-joint, 100mg of the autogenous graft. Was analyzed after 30, 60 and 90 days, survey radiographs in the joint atlantoaxial, histopathological and bone density by computed tomography of the fragments collected through biopsies. The right and left hemi-joint atlantoaxial has moderate formation in the 30 days pos-operative. In the 60 days, has bone formation with partial fusion more in the autogenous side (left) and the 90 days, the bone formation with partial fusion was high in the homogenous side (right). Computed tomography evaluation in the 30 and 60 days post-operative has high bone density in the fragments collected in the right hemi-joint atlantoaxial (homogenous implant). In the 90 days, the bone density in the fragments collected in the right and left hemi-joint were similar with tendency in cortical bone formation. The evaluation histological of the bone fragments in the left hemi-joint (cancellous bone graft) and right hemi-joint (homogenous implant) atlantoaxial were similar in the 30 and 60 days post-operative. In the 90 days, bone tissue mature and organized was observed. No has significant difference the right hemi-joint atlantoaxial (homogenous implant) with the left hemi-joint (cancellous bone graft) when comparison the grade fusion joint and bone density the fragments collected by biopsies. The use of the homogenous cancellous bone implant glycerin-stored in dogs submitted atlantoaxial arthrodesis with Steinmamm pins associated acrylic resin is a viability method for treatment in the atlantoaxial instability.