Peer-reviewed veterinary case report
Hindlimb bone and posture changes in Toy poodles with grade 2 knee
By Tomo, Yuma et al.·Published in Veterinary and comparative orthopaedics and traumatology : V.C.O.T·2022·Department of Veterinary Medicine, Japan·View original on PubMed →
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Original publication title: Evaluation of Hindlimb Deformity and Posture in Dogs with Grade 2 Medial Patellar Luxation during Awake Computed Tomography Imaging while Standing.
- Species:
- dog
Plain-English summary
A group of Toy Poodles with grade 2 medial patellar luxation (MPL) were examined to see how their hindlimb posture changed when their kneecap was out of place. The study found that while these dogs did not have any bone deformities, they did show significant postural abnormalities, such as unusual rotations in their femur and tibia, when their kneecap was luxated. This means that if your dog has MPL, you might notice them standing or walking differently when their kneecap is dislocated. Understanding these changes can help your veterinarian provide better treatment options.
People also search for: Toy Poodle kneecap dislocation · dog patellar luxation symptoms · how to treat medial patellar luxation in dogs
Abstract
OBJECTIVE:  The aim of this study was to determine the degree of bone deformities and hindlimb postural abnormalities in a standing position in awake Toy poodles with and without grade 2 medial patellar luxation (MPL) using high speed 320-row computed tomography (CT). METHODS:  The limbs with grade 2 MPL (MPL-G2 group) and without any orthopaedic disorders (control group) were imaged in a standing position, without sedation or anaesthesia, using CT. In MPL-G2 group, images were obtained when the patella was luxated (G2-L group) and reduced (non-luxation, G2-NL group). Bone morphologies of the femur and tibia were quantified three-dimensionally. Hindlimb standing posture was evaluated by measuring femoral rotation and abduction angles, tibial rotation angle, metatarsal rotation angle, foot rotation angle, angle between the femoral anatomical axis and the mechanical axis of hindlimb and stifle joint line convergence angle. RESULTS:  There were no significant differences in bone morphologic parameters between the MPL-G2 group (5 limbs) and the control group (6 limbs). In the G2-NL group, there were no significant hindlimb postural abnormalities. In contrast, in the G2-L group, significant hindlimb postural abnormalities including external rotation of femur, internal rotation of tibia and foot, external rotation of tarsal joint, large stifle joint convergence angle, genu varum and toe-in standing were observed. CONCLUSION:  Dogs with grade 2 MPL have no bone deformities but show abnormal standing posture when the patella is luxated.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/34933377/