🔍 Key Findings
- Proximal Tibia Metatarsal Angle (PTMTA) was significantly increased in dogs with grade 3 and 4 MPL, making it a useful marker for severity.
- PTMTA strongly correlated with Tibial Torsion Angle (TTA) (r = 0.733) and Crural Rotation Angle (CRA) (r = 0.643), integrating multiple morphological deformities.
- Grade 4 MPL cases showed significant internal tibial torsion, increased mMPTA, and decreased MDTT/PTW—indicating both rotation and medial displacement.
- DTMTA was significantly more negative in grade 4, indicating a consistent pattern of internal foot rotation with disease severity.
- PTMTA can be visually assessed during palpation, offering preoperative utility without CT.
- Among toy poodles, PTMTA showed significant differences even between grades 3 and normal, suggesting breed-specific severity patterns.
- Corrective osteotomy may need to address tibial as well as femoral deformities in severe MPL cases with high PTMTA.
- Younger dogs with grade 4 MPL had more severe deformities, possibly due to early onset or developmental progression.
