Diaphyseal proximal tibial angle
Diaphyseal proximal tibial angle
- Acronym: DPTA
Definition
The diaphyseal proximal tibial angle (DPTA) (or diaphyseal tibial axis/proximal tibial axis angle) is a measurement used to assess the anatomy of the tibia and its modification in predisposed dogs or dogs at risk for cranial cruciate ligament rupture. It is determined from a mediolateral radiograph of the tibial. The X-ray beam is centred at the stifle joint, with the normal standing joint angles of the pelvic limb. The mediolateral projection is considered acceptable when the medial condyle and lateral condyle of femur are superimposed.
The diaphyseal proximal tibial angle is the angle between the proximal tibial axis and the anatomic tibial (or diaphyseal tibial) axis
The following values have been published for the diaphyseal proximal tibial angle in healthy dogs:
>20 kg dogs : 4.1+/-2.2° (Osmond et al. 2016)
Labrador Retrievers : 4.5 +/- 2.3° (Vedrine et al. 2013)
Yorkshire Terriers : 10.8 +/- 4.3° (Vedrine et al. 2013)
Small breed dogs :10.2+/-7.3° (Witte 2015)
References
Osmond CS, Marcellin-Little DJ, Harrysson OL, Kidd LB. Morphometric assessment of the proximal portion of the tibia in dogs with and without cranial cruciate ligament rupture. Vet Radiol Ultrasound. 2006 Mar-Apr;47(2):136-41. doi: 10.1111/j.1740-8261.2006.00119.x. PMID: 16553144.
Vedrine B, Guillemot A, Fontaine D, Ragetly GR, Etchepareborde S. Comparative anatomy of the proximal tibia in healthy Labrador Retrievers and Yorkshire Terriers. Vet Comp Orthop Traumatol. 2013;26(4):266-70. doi: 10.3415/VCOT-12-02-0018. Epub 2013 Apr 24.
Witte PG. Tibial anatomy in normal small breed dogs including anisometry of various extracapsular stabilizing suture attachment sites. Vet Comp Orthop Traumatol. 2015;28(5):331-8. doi: 10.3415/VCOT-14-12-0186. Epub 2015 Jul 21. PMID: 26195139.
