|Case study: 3D printing using computed tomography (CT)
Bob Jackson, 2 year old, male neutered, English Springer Spaniel
Humeral intercondylar fissure (HIF) is a condition of the canine elbow, which is poorly understood. It was originally thought to be caused by the failure of the medial and lateral humeral condyles to fuse between eight and twelve weeks of age- incomplete ossification of the humeral condyle (IOHC). However, new evidence suggests HIFs may develop later in life, possibly as a result of abnormal loading. A genetic component is highly suspected given that spaniel breeds are largely affected. The condition can be asymptomatic, result in forelimb lameness or can give rise to a stress fracture.
Bob first presented as an emergency with a humeral bi-condylar “Y” fracture of the left elbow (Figure 1a). This was successfully repaired and Bob gradually returned to normal exercise post-surgery (Figure 1b). No intercondylar fissures were seen at the time on radiographs of the right elbow.
Figure 1 a) Left elbow bi-condylar fracture b) Post-operative radiograph of fracture repair using a combination of lag screws, locking compression plates and a SOP plate.