Mechanical cranial distal tibial angle - Dog - axes and angles - Tibia - vet-Anatomy
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Mechanical cranial distal tibial angle

Mechanical cranial distal tibial angle

  • Acronym: mCrDTA

Definition

Stephan Mahler

The mechanical cranial distal tibial angle is a measurement used to assess angular deformities of the tibia and provide guidance for corrections. Is determined from a mediolateral radiograph or a multiplanar reconstructed CT images of the entire tibia. For radiographic evaluation, the dog is positioned in lateral recumbency and a mediolateral radiograph is taken: the view includes the tibia, the stifle joint and the tarsal joint: the beam is centered on the mid-tibial diaphysis with the stifle and tarsus joints both at 90° flexion.

The mechanical cranial distal tibial angle is the angle between the mechanical tibial axis and the distal tibial joint orientation line, at the cranial aspect fo the tibia.

The following results have been found for the mechanical cranial distal tibial angle in healthy dogs:

  • Small breeds: 91° [70–101] (Radiography) (Garnoeva et al. 2018)

  • Toy Poodles: 91.0 ± 4.6° (Radiography) (Yasukawa et al. 2016)

  • Small Breed dogs: 86.3 ± 1.5° (Radiography) (Olimpo et al. 2016)

  • Chihuahuas: 91.9 +/- 2.4° (Radiography) (Phetkaew et al. 2018)

  • Toy Poodles: 98.5 ± 3.8° (CT) (Yasukawa et al. 2016)

  • Chihuahuas: 94.9 +/-3.1° (CT) (Phetkaew et al. 2018)

References

  • Garnoeva, R, Roydev, R, Paskalev, M et al. Radiographic measures of pelvic limb malalignment in small breed dogs with various grades of medial patellar luxation. Comp Clin Pathol 2018;27, 1551–1555. doi.org/10.1007/s00580-018-2772-8

  • Olimpo M, Piras LA, Peirone B. Pelvic limb alignment in small breed dogs: a comparison between affected and free subjects from medial patellar luxation. Vet Ital. 2016 Jan-Mar;52(1):45-50. doi: 10.12834/VetIt.71.206.3.

  • Phetkaew T, Kalpravidh M, Penchome R, Wangdee C. A Comparison of Angular Values of the Pelvic Limb with Normal and Medial Patellar Luxation Stifles in Chihuahua Dogs Using Radiography and Computed Tomography. Vet Comp Orthop Traumatol. 2018 Feb;31(2):114-123. doi: 10.3415/VCOT-17-05-0067. Epub 2018 Mar 13. Erratum in: Vet Comp Orthop Traumatol. 2018 Feb;31(2):a1.

  • Yasukawa S, Edamura K, Tanegashima K, Seki M, Teshima K, Asano K, Nakayama T, Hayashi K. Evaluation of bone deformities of the femur, tibia, and patella in Toy Poodles with medial patellar luxation using computed tomography. Vet Comp Orthop Traumatol. 2016;29(1):29-38. doi: 10.3415/VCOT-15-05-0089. Epub 2015 Dec 7.

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