Mechanical caudal proximal tibial angle - Dog - axes and angles - Tibia - vet-Anatomy
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Mechanical caudal proximal tibial angle

Mechanical caudal proximal tibial angle

  • Acronym: mCdPTA

Definition

The mechanical caudal proximal 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 caudal proximal tibial angle is the angle between the mechanical tibial axis and the proximal tibial joint orientation line.

The following results have been found for the mechanical caudal proximal tibial angle in healthy dogs

  • Small breeds: 65 +/-3,02° (Radiography) (Olimpo et al. 2016)

  • Small breeds: 63° (54–84) (Radiography) (Garnoeva et al. 2018)

  • Chihuahua: 63.1 +/- 1.5° (Radiography) (Phetkaew et al. 2018)

  • Medium to large breed dogs 63.6+/- 3.7° (Radiography) (Dismukes et al. 2008)

  • Chihuahua: 65.3 +/- 2.6° (CT) (Phetkaew et al. 2018)

  • English Bulldogs: 63.25 +/- 6.15° (CT) (Lusetti et al. 2017)

References

  • Dismukes DI, Tomlinson JL, Fox DB, Cook JL, Witsberger TH. Radiographic measurement of canine tibial angles in the sagittal plane. Vet Surg. 2008 Apr;37(3):300-5. doi: 10.1111/j.1532-950X.2008.00381.x.

  • 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

  • Lusetti F, Bonardi A, Eid C, Brandstetter de Belesini A, Martini FM. Pelvic limb alignment measured by computed tomography in purebred English Bulldogs with medial patellar luxation. Vet Comp Orthop Traumatol. 2017 May 10;30(3):200-208. doi: 10.3415/VCOT-16-07-0116. Epub 2017 May 5.

  • 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.

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