Mechanical cranial proximal tibial angle
Mechanical cranial proximal tibial angle
- Acronym: mCrPTA
Definition
The mechanical cranial 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 cranial proximal tibial angle is the angle between the mechanical tibial axis and the proximal tibial joint orientation line in the cranial aspect fo the tibial
The following results have been found for the mechanical cranial proximal tibial angle in healthy dogs
Small breeds: 88° [71–102] (Garnoeva et al. 2018)
Toy Poodles: 117.5 ± 4.7° (Radiography) (Yasukawa et al. 2016)
Medium to large bree dog: 63,6 ± 4,2° (Radiography) (Dismukes et al. 2008)
Toy Poodles: 111.3 ± 3.3° (CT) (Yasukawa et al. 2016)
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
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.
