Flückiger Mark A, Steffen Frank, Hässig Michael, Morgan Joseph P
Prof. Dr. med. vet. Mark A. Flückiger, Dysplasia Committee, Department of Small Animal Clinics, University of Zurich, Winterthurerstrasse 260, 8057 Zürich, Switzerland, Phone: +41 795 265 673, Fax: +41 446 358 940, E-mail:
Prof. Dr. med. vet. Michael Hässig, Section of Herd Health, Department of Farm Animal Clinics, University of Zurich, Winterthurerstrasse 260, 8057 Zürich, Switzerland, Phone : +41 446 358 260, Fax: +41 446 358 904, E-mail:
Vet Comp Orthop Traumatol. 2017 Mar 20;30(2):137-142. doi: 10.3415/VCOT-16-05-0072. Epub 2017 Jan 17.
This study examines the relationship between the morphology of the lumbosacral transitional vertebra (LTV) and asymmetrical development of the hip joints in dogs.
A total of 4000 dogs which had been consecutively scored for canine hip dysplasia were checked for the presence of a LTV. A LTV was noted in 138 dogs and classified depending on the morphology of the transverse processes and the degree of contact with the ilium.
In dogs with an asymmetrical LTV, the hip joint was significantly more predisposed to subluxation and malformation on the side of the intermediate or sacral-like transverse process (p <0.01), on the side of the elevated pelvis (p <0.01), or when an asymmetrical LTV resulted in pelvic rotation on its long axis (p <0.01), whereas hip joint conformation was less affected on the side featuring a free transverse process (p <0.01).
The results support our hypothesis that an asymmetrical LTV favours pelvic rotation over its long axis, resulting in inadequate femoral head coverage by the acetabulum on one side. Inadequate coverage of the femoral head favours subluxation, malformation of the hip joint, and secondary osteoarthritis. Asymmetrical hip conformation may therefore be the sequela of a LTV and mask or aggravate genetically induced canine hip dysplasia.
本研究探讨犬腰骶部移行椎（LTV）形态与髋关节不对称发育之间的关系。
对4000只连续进行犬髋关节发育不良评分的犬进行LTV检查。138只犬发现有LTV，并根据横突形态和与髂骨的接触程度进行分类。
在具有不对称LTV的犬中，髋关节在中间型或骶骨样横突侧（p<0.01）、骨盆抬高侧（p<0.01），或当不对称LTV导致骨盆沿其长轴旋转时（p<0.01），明显更易发生半脱位和畸形，而在具有游离横突的一侧，髋关节形态受影响较小（p<0.01）。
结果支持我们的假设，即不对称LTV有利于骨盆沿其长轴旋转，导致一侧髋臼对股骨头的覆盖不足。股骨头覆盖不足易导致半脱位、髋关节畸形和继发性骨关节炎。因此，不对称的髋关节形态可能是LTV的后遗症，并掩盖或加重遗传性犬髋关节发育不良。
