Results from this study were presented at the European Veterinary Diagnostic Imaging meeting in Giessen, Germany on Saturday July 24, 2010.
ASSESSMENT OF FIVE OBLIQUE RADIOGRAPHIC PROJECTIONS OF THE CANINE TEMPOROMANDIBULAR JOINT
Article first published online: 15 JUN 2012
© 2012 Veterinary Radiology & Ultrasound
Veterinary Radiology & Ultrasound
Volume 53, Issue 5, pages 501–506, September/October 2012
How to Cite
Hammond, G., King, A. and LaPaglia, J. (2012), ASSESSMENT OF FIVE OBLIQUE RADIOGRAPHIC PROJECTIONS OF THE CANINE TEMPOROMANDIBULAR JOINT. Veterinary Radiology & Ultrasound, 53: 501–506. doi: 10.1111/j.1740-8261.2012.01956.x
- Issue published online: 11 SEP 2012
- Article first published online: 15 JUN 2012
- Manuscript Accepted: 3 MAY 2012
- Manuscript Received: 28 MAR 2012
- Vacation Scholarship from the Wellcome Trust
Investigation of temporomandibular joint (TMJ) disease requires a clear diagnostic image, which can be challenging to obtain using conventional radiography. The aim of this study was to compare five different oblique radiographic views with the head in lateral recumbency, assessing the clarity of visualization of the normal TMJ anatomy. The views under investigation were the laterorostral–laterocaudal oblique at a 10° and 20° rotation of the head (“nose-up” view), laterorostral–laterocaudal oblique with a rostrocaudal X-ray beam angulation of 10° and 20°, and a parallax view with the beam centered over C2 and collimated to include the TMJ region, using the divergence of the X-ray beam to project the TMJs separately on the radiograph. The views were performed on both TMJs of thirty canine cadavers and were graded independently by experienced and inexperienced observers. Grading was performed on the mandibular fossa, condylar process, joint space, retroarticular process, and the overall TMJ, and was based on a four-point scale. Mean grades for each component and for the overall joint were compared for each observer and each projection. Mean grades were significantly (P < 0.05) higher for the “Nose-up” projections than the angled beam or parallax projections, as was interobserver agreement, and both observers showed significantly higher (P < 0.05) mean grades for the 20o “Nose-up” angulation than the 10o “Nose-up” angulation. These results suggest that a latero 20o rostral–laterocaudal oblique gives the best representation of the anatomy of the TMJ of the dog of the projections assessed, and should be considered when investigating clinical cases of TMJ disease.