Laboratory of Veterinary Emergency Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.
Veterinary Medical Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.
Vet Comp Orthop Traumatol. 2022 Sep;35(5):314-320. doi: 10.1055/s-0042-1749151. Epub 2022 Jun 27.
Trochleoplasty is often performed in dogs with medial patellar luxation (MPL); however, the current guidelines on when to perform a trochleoplasty in dogs are vague. The sulcus angle (SA) is used to assess the femoral trochlear morphology in humans. The aim of this study is to describe a method to measure the SA and other parameters of trochlea morphology in dogs using computed tomography. First, we searched for a suitable measuring location for the SA. Transverse images of the femurs were obtained as perpendicular planes to the tangent of the femoral trochlea which was 0 to 60 degrees (every 5 degrees) to the anatomical axis of the femur. The deepest point of the femoral trochlea was found in the transverse images perpendicular to the tangent of the femoral trochlea which was at 15 degrees to the anatomical axis of the femur. The SA and the other parameters of femoral trochlea morphology were measured at the deepest point of the femoral trochlea. The SA of the stifle joints with grade 3 and 4 MPL was significantly higher than the SA of stifle joints not affected by MPL. There was no significant difference in the SA between dogs affected by grade 1 and 2 MPL and dogs not affected by MPL. Further studies are needed to establish whether the SA can be used as selection criteria for trochleoplasty.
滑车成形术常用于治疗犬内侧髌骨脱位（MPL）；然而，目前关于何时对犬进行滑车成形术的指南较为模糊。滑车沟角（SA）用于评估人类股骨滑车形态。本研究旨在描述一种使用计算机断层扫描（CT）测量犬 SA 及其他滑车形态参数的方法。首先，我们寻找合适的 SA 测量位置。股骨的横断面图像是垂直于股骨滑车切线的平面，股骨滑车切线与股骨解剖轴的夹角为 0 至 60 度（每 5 度一次）。在垂直于股骨滑车切线的横断面上可以找到股骨滑车的最深处，该切线与股骨解剖轴的夹角为 15 度。在股骨滑车的最深处测量 SA 和其他股骨滑车形态参数。3 级和 4 级 MPL 的膝关节 SA 明显高于不受 MPL 影响的膝关节 SA。1 级和 2 级 MPL 犬与不受 MPL 影响的犬之间的 SA 无显著差异。需要进一步研究以确定 SA 是否可作为滑车成形术的选择标准。
