Coutin Julia V, Lewis Daniel D, Kim Stanley E, Reese David J
Virginia-Maryland Regional College of Veterinary Medicine, Blacksburg, VA, USA.
J Am Anim Hosp Assoc. 2013 May-Jun;49(3):216-23. doi: 10.5326/JAAHA-MS-5836. Epub 2013 Mar 27.
A 7 mo old male rottweiler was evaluated for a right hind limb lameness caused by malunion of a Salter-Harris type II fracture. Radiographs and computed tomography (CT) revealed that the right distal femur had valgus, procurvatum, external rotation, and was 35% (70 mm) shorter than the contralateral femur. Distal femoral wedge ostectomies were performed to acutely correct the angular and rotational deformities. Lengthening of the femur was accomplished by distraction osteogenesis performed over 53 days at a second, proximal diaphyseal osteotomy using a circular fixator construct. This bifocal approach yielded approximately 30 mm of femoral lengthening and a confluent column of regenerate bone that bridged the distraction gap. When evaluated 14 mo after surgery, the dog held the right hip, stifle, and hock in a slightly extended posture when standing and had a subtle asymmetric hind limb gait. The stride of the right hind limb was slightly shortened with compensatory circumduction of the left hind limb during the swing phase of the stride.
一只7个月大的雄性罗威纳犬因Salter-Harris II型骨折畸形愈合导致右后肢跛行而接受评估。X线片和计算机断层扫描（CT）显示，右股骨远端有外翻、前凸、外旋，且比对侧股骨短35%（70毫米）。进行了股骨远端楔形截骨术以急性纠正角度和旋转畸形。股骨延长通过在第二次近端骨干截骨处使用环形固定器结构进行53天的牵张成骨来完成。这种双焦点方法使股骨延长了约30毫米，并形成了一个融合的再生骨柱，跨越了牵张间隙。术后14个月评估时，该犬站立时右髋、 stifle和跗关节保持轻微伸展姿势，后肢步态有轻微不对称。右后肢的步幅略有缩短，在步幅摆动阶段左后肢有代偿性环行。
