Anatomic caudal distal radial angle - Dog - axes and angles - Radius - vet-Anatomy
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Anatomic caudal distal radial angle

Anatomic caudal distal radial angle

  • Acronym: aCdDRA

Definition

Stephan Mahler

The anatomic caudal distal radial angle (aCdDRA) is a landmark used to assess angular deformities of the radius and provide guidance for corrections. It is determined from a mediolateral radiograph, or multiplanar reconstructed CT images of the radius.

The anatomic caudal distal radial angle is measured between the distal anatomic radial axis and the distal radial joint orientation line in the sagittal plane.

The following mean value have been reported for the anatomic caudal distal radial angle:

  • Medium and Large breed dogs : 78.3 +/- 4.8° (Fox et al. 2006)

  • Small-breed nonchondrodystrophic dogs : 83.08 +/- 3.14° (Duncan et al.2022)

  • Shih-Tzu : 84.27 +/- 1.79° (Jeong et al. 2020)

  • Welsh Corgi : 59.90 +/- 4.44° (Kwon et al2022)

  • Dachshund : 64.79 +/- 4.43° (Kwon et al2022)

  • Pekingese : 66.53 +/- 3.59° (Kwon et al2022)

  • Matesese : 77.59 +/- 4.72° (Kwon et al2022)

  • Poodle : 71.11 +/- 3.80° (Kwon et al2022)

  • Beagle : 75.62 +/- 3.87° (Kwon et al2022)

  • Labrador Retrievers : 77° (range 75.9 to 78.0°) (Fox and Tomlinson 2018)

References

Kwon et al. (2022). Evaluation of the radial procurvatum using the center of rotation of angulation methodology in chondrodystrophic. Dogs Front Vet Sci; 8:774993. doi: 10.3389/fvets.2021.774993

Fox J, Tomlinson JL. Principles of Angular Limb Deformity Correction. In: Tobias KM, Johnston SA, editors. Veterinary Surgery Small Animal. St Louis (MI): Elsevier Saunders; 2012. p.657-668.

Fox et al. (2006). Principles of Uniapical and Biapical Radial Deformity Correction Using Dome Osteotomies and the Center of Rotation of Angulation

Methodology in Dogs. Veterinary Surgery;35:67–77. doi:10.1111/j.1532-950X.2005.00114.x

Jeong J et al. (2020) Measurement of Thoracic Limb Joint Reference Angles in Purebred Shih-Tzu Dogs by Computed Tomography. J Vet Clin 37(4):169 doi.org/10.17555/jvc.2020.08.37.4.169

Duncan et al. (2022). Assessment of normal radial joint orientation angles in nonchondrodystrophic small-breed dogs. J Am Vet Med Assoc. Sep 1;261(1):1-4. doi: 10.2460/javma.22.07.0286.

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