Pedicle screw-rod fixation of the canine lumbosacral junction.
Vet Surg
; 41(6): 720-32, 2012 Aug.
Article
in En
| MEDLINE
| ID: mdl-22823009
ABSTRACT
OBJECTIVE:
To assess pedicle screw-rod fixation (PSRF) of the canine lumbosacral junction (LSJ) ex vivo and in vivo. STUDYDESIGN:
Ex vivo cadaver study and in vivo pilot study. SAMPLE POPULATION Six canine cadaveric lumbosacral spinal specimens and 3 Greyhound dogs diagnosed with degenerative lumbosacral stenosis (DLSS).METHODS:
Ex vivo study PSRF of the LSJ was performed in 6 spinal specimens using guidelines and was evaluated by radiography, computed tomography, and magnetic resonance imaging. In vivo study 3 Greyhounds diagnosed with DLSS had dorsal laminectomy and partial discectomy combined with PSRF of the LSJ. Curettage of the endplates with insertion of an autologous cancellous bone graft was performed to promote spinal fusion. During 18-month follow-up, dogs were monitored by clinical evaluation, diagnostic imaging, and force plate analysis. Dogs were euthanatized for reasons unrelated to PSRF or their lumbosacral disease, and postmortem imaging and histopathologic investigations of the LSJ were performed.RESULTS:
Ex vivo study Sixteen of 24 inserted screws had an acceptable placement. In vivo study Ten of 12 inserted screws had acceptable placement. Clinical signs of ``lower'' back pain resolved at 4 weeks after surgery. Diagnostic imaging and histopathology showed no bony spinal fusion of the LSJ. Force plate analysis revealed a trend toward improved pelvic limb function relative to preoperative function.CONCLUSIONS:
PSRF of the LSJ of large breed dogs is technically possible. Improvements to the surgical technique to induce spinal fusion and assessment in a larger sample size are required before it can be recommended.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Spinal Cord Compression
/
Spinal Fusion
/
Bone Screws
/
Dog Diseases
/
Lumbosacral Region
Type of study:
Guideline
Limits:
Animals
Language:
En
Journal:
Vet Surg
Year:
2012
Document type:
Article
Affiliation country:
Netherlands