Tangential Radiographic Projection for Investigation of the Equine Temporomandibular Joint

To (1) describe a tangential radiographic projection of the equine temporomandibular joint (TMJ) and (2) optimize the radiographic angle and determine its use in standing sedated horses. Descriptive study. Cadaveric equine skulls (n=11); 8 horses with a history of quidding or headshaking. Tangential...

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Veröffentlicht in:Veterinary surgery 2009-07, Vol.38 (5), p.601-606
Hauptverfasser: Townsend, N. B, Cotton, J. C, Barrkzai, S. Z
Format: Artikel
Sprache:eng
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Zusammenfassung:To (1) describe a tangential radiographic projection of the equine temporomandibular joint (TMJ) and (2) optimize the radiographic angle and determine its use in standing sedated horses. Descriptive study. Cadaveric equine skulls (n=11); 8 horses with a history of quidding or headshaking. Tangential radiographic projections were taken of a TMJ of a cadaveric skull before and after intra-articular injection of radiographic contrast. Additional tangential radiographic projections were taken after TMJ dissection and placement of a wire along the articular surface of the mandibular condyle. Subsequently, 3 tangential radiographs were taken of both TMJs of 10 skulls at 75°, 70°, and 65° to the dorsal plane (Rt/Le15Cd70D-Le/RtRVO). Each of the 3 images for each TMJ was ranked by 4 observers who were unaware of the projection angle. Interobserver variation was calculated using a Friedman analysis of variance and significance of the most prevalent angle with a 1-sample repeated measures test. Tangential radiographic projections of both TMJs were then taken of 8 standing sedated horses. Tangential radiographic projections allowed the lateral half of the TMJ to be viewed without superimposition of other structures and the anatomic orientation was determined. A 70° projection to the dorsal plane was ranked as significantly better than other views (P
ISSN:0161-3499
1532-950X
DOI:10.1111/j.1532-950X.2009.00536.x