J Vet Sci.  2014 Dec;15(4):563-568. 10.4142/jvs.2014.15.4.563.

Feasibility of utilizing the patellar ligament angle for assessing cranial cruciate ligament rupture in dogs

  • 1Department of Veterinary Surgery, College of Veterinary Medicine, Konkuk University, Seoul 143-701, Korea. swjeong@konkuk.ac.kr


The patellar ligament angle (PLA) was assessed in 105 normal stifle joints of 79 dogs and 33 stifle joints of 26 dogs with a ruptured cranial cruciate ligament (CrCL). The PLA of stifles with complete CrCL rupture was significantly lower than that of normal stifles, particularly at a flexion angle of 60~80degrees in both plain and stress views. If the PLA was <90.55degrees on the stress view with a 60~80degrees flexion angle, the dog was diagnosed with a complete rupture of the CrCL with a sensitivity of 83.9% and specificity of 100%. In conclusion, measuring the PLA is a quantitative method for diagnosing complete CrCL rupture in canines.


cranial cruciate ligament rupture; dog; patellar ligament angle
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