A 7 mo old male rottweiler was evaluated for a right hind limb lameness caused by malunion of a Salter-Harris type II fracture. Radiographs and computed tomography (CT) revealed that the right distal femur had valgus, procurvatum, external rotation, and was 35% (70 mm) shorter than the contralateral femur. Distal femoral wedge ostectomies were performed to acutely correct the angular and rotational deformities. Lengthening of the femur was accomplished by distraction osteogenesis performed over 53 days at a second, proximal diaphyseal osteotomy using a circular fixator construct.
No abstract available
Elbow dysplasia is a common debilitating condition of large and giant breed dogs. Environmental factors and a complex genetic heritability play a role in predisposing dogs to elbow dysplasia with two aetiopathogeneses suggested for the development of the disease. Osteochondrosis was initially thought to cause elbow dysplasia, but more recent evidence has strongly supported various forms of jointincongruity as the most likely cause in most cases.
There is a high incidence of patellar luxation (PL) in Pomeranian dogs from Thailand. DNA samples were collected from 59 dogs originating from 15 families. PL was present in 75% of the dogs with a male:female ratio of 1:1.95. Polymorphic microsatellites situated close to the COL6A1, COL6A3, COL9A1, COL9A2, and COL9A3 genes were analyzed for linkage to the phenotype. Sibling-pair analysis revealed that none of the collagen markers analyzed had a high non-parametric linkage score with the highest score, 1.56, for COL9A2 (P=0.07).
A five-month-old Airedale Terrier was presented with a history of right thoracic limb lameness. Clinical and radiographic examinations revealed caudolateral luxation of the right radial head. Surgical intervention involved an oblique proximal radial osteotomy and gradual craniomedial traction of the radial head using an external skeletal fixator (ESF) incorporating a traction device. The radial head was gradually reduced over 16 days. After radiographic confirmation of appropriate radial head reduction, a consolidation phase followed, with removal of the traction ESF after 24 days.
Objective-To report thoracolumbar caudal articular process malformations with secondary constrictive fibrosis of the spinal cord in Pugs. Design-Retrospective case series. Animals-11 Pugs with neurologic dysfunction resulting from constriction of fibrous tissue secondary to thoracolumbar caudal articular process malformation and 5 Pugs with no neurologic dysfunction.
To determine the effect of elevation of the distal femur on radiographic determination of the anatomic lateral distal femoral angle (aLDFA) in an in vitro canine model.
In vitro study.
Cadaveric canine femora (n = 7 pairs).
To determine if medial patellar luxation (MPL) in Yorkshire Terriers is associated with tibial torsion.
Prospective cross-sectional study.
Yorkshire Terriers (n = 30; 60 tibiae).
Each MPL was graded using a categorical grading scheme. Computed tomography of the tibiae was performed and tibial torsion angle (TTA) was assessed. MPL grade was analyzed with a general linear model where the independent variables include sex, neutering status, age, weight, and TTA.
A 26-week-old female Boerboel was referred for evaluation of progressive left thoracic limb lameness. Computed tomography and radiographic evaluation revealed radiolucency of the caudal region of the proximal humeral metaphysis, absence of the humeral head, and gross distortion of the glenoid. Given the severe glenohumeral deformation, arthrodesis of the left shoulder was performed using orthogonal locking bone plates, lag screw fixation, and bone grafting. Despite late implant failure, arthrodesis was successful in this case, and satisfactory limb function was restored.
This is a report of mandibulo-zygomatic arch synostosis in a dog 7 mo after trauma to the maxilla. Advanced diagnostic imaging was considered essential for characterization of the condition and treatment planning. Surgical excision of the bony proliferation and physiotherapy resulted in improved function within 6 wk.