Spine

OBJECTIVE: To develop a patient-specific 3-dimensional (3D) printed drill guide for placement of cervical transpedicular screws and to assess its accuracy.

STUDY DESIGN: Prospective case-series.

SAMPLE POPULATION: Thirty-two cervical pedicle screws (CPS) placed in 3 large breed dogs.

Category: Spine

OBJECTIVE: This case series describes the clinical presentation, management and outcome of three cats diagnosed with cervical intervertebral disc disease that underwent decompressive ventral slot surgery.

METHODS: This is a retrospective case series evaluating client-owned cats undergoing a ventral slot surgical procedure to manage cervical intervertebral disc disease (n = 3).

RESULTS: A routine ventral slot surgery was performed in each case without complication, resulting in postoperative neurological improvement in all three cases.

Category: Spine

OBJECTIVE: To determine the biomechanical behavior of a novel distraction-stabilization system, consisting of an intervertebral distraction bolt, polyaxial screws, and connecting rods, in the canine lumbosacral spine.

STUDY DESIGN: Biomechanical study.

SAMPLE POPULATION: Cadaveric canine lumbosacral spines (L4-Cd3) (N = 8).

Category: Spine

OBJECTIVE: To evaluate the occurrence and frequency of abnormalities at the second and third cervical vertebral junction (C2/3) in dogs with and without atlantoaxial instability (AAI).

STUDY DESIGN: Retrospective multi-institutional case-controlled case series.

ANIMALS: One hundred and seventeen dogs with AAI and 117 dogs without AAI.

Category: Spine

OBJECTIVES: Ventral atlantoaxial stabilization techniques are challenging surgical procedures in dogs. Available surgical guidelines are based upon subjective anatomical landmarks, and limited radiographic and computed tomographic data.

Category: Imaging - Spine

A 7-year-old cat was referred with pelvic limb ataxia. Radiography and CT revealed bone resorption of the L1 vertebral arch, and myelography identified a compressive extradural lesion.

The mass was surgically removed and histopathologically diagnosed as giant cell osteosarcoma. Three years later, the recurrent tumor resection and vertebral fixation were performed. Six months later, vertebrectomy was performed to radically excise the recurrent mass and a titanium spinal cage was placed.

Category: Spine

Atlanto-axial (AA) instability due to ligament insufficiency is a common cause of cervical spinal cord compression in toy breeds. However, in some dogs a difference in size between the atlas and the axis leads to joint incongruence that exacerbates AA subluxation and makes surgical treatment challenging.

Category: Imaging - Spine

OBJECTIVE: To determine the accuracy and safety of pin placement for lateral vertebral stabilization to the reference dorsal stabilization.

STUDY DESIGN: A randomized noninferiority trial.

SAMPLE POPULATION: Twenty Greyhound cadaveric lumbar spines (L1-L6).

OBJECTIVE: To determine the influence of preoperative computed tomography (CT) versus magnetic resonance (MR) on hemilaminectomies planned to treat thoracolumbar (TL) intervertebral disc (IVD) extrusions in chondrodystrophic dogs.

STUDY DESIGN: Prospective clinical study.

SAMPLE POPULATION: Forty chondrodystrophic dogs with TL IVD extrusion and preoperative CT and MR studies.

Category: Spine

OBJECTIVE: To determine the stability of a simulated complete L7-S1 fracture-luxation immobilized with SOP locking plate system, compared to pins and polymethylmethacrylate (PMMA).

STUDY DESIGN: In vitro biomechanical study.

ANIMALS: Cadaver specimens of 18 skeletally mature large-breed dogs.