PMC7838352_01
Preoperative radiographs taken by the referring veterinarian. Note the lack of apparent fractures in the right stifle.
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F1
A single radiograph taken by the referring veterinarian showed no evidence of fracture or other orthopedic disease (Figure 1).
(A) Placement of the patient in dorsal recumbency with the patella pointing upwards (head is to the left of picture); (B) Craniolateral skin incision is created centered proximal-distal along the lateral border of the patella; (C) Manual luxation of the patella medially, which exteriorizes the trochlear groove. Note the shallow concavity present within the intertrochlear groove; (D) Trochlear wedge recession being performed with a reciprocating saw.
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F2
Curved Mayo scissors were used to extend the arthrotomy and the patella was luxated medially (Figure 2).
(A) Lateral to medial view of the trochlear groove following temporary removal of an osteochondral wedge segment; (B) Proximal to distal (skyline) view of the trochlear groove following recession and replacement of osteochondral wedge.
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F3
Surgical, Largo, Florida, US) was used to perform a wedge recession. Sufficient depth of the groove was confirmed by replacing the patella into the groove and afterwards ensuring a sufficient portion of the wedge was seated within the groove (Figure 3).
(A) The tibial tuberosity is transposed 0.75 cm laterally and secured with two 0.0625" Kirschner wires. A lateral to medial bone tunnel is manually drilled in the cranial cortex of the tibia immediately distal to the osteotomy; (B) After passing the wire through the distal bone tunnel, the wire was passed in a figure of 8 pattern to wrap over the proximally situated Kirschner wires; (C) The wires are tightened to secure the tension band. The Kirschner wires and cerclage wire are trimmed short.
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F4
Two 0.0625 inch K wires were placed in the proximal tibia, and an 18 gauge tension band placed routinely (Figure 4).
Post-operative right stifle. A vertical radiolucent tibial tuberosity transposition osteotomy is evident on the mediolateral (A) view. Stabilizing anchor pins, cerclage wire and bone tunnel are observed on both the craniocaudal (B) and mediolateral views. The position of the patella is normal.
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F5
Post-operative radiographs of the image were obtained (Figure 5).
Seven week recheck right stifle. The distal half of the osteotomy exhibits a mineral opacity on the mediolateral view (A). The position of the patella remains normal with no change in the appearance of the internal stabilization on the craniocaudal (B) or mediolateral views.
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F6
Post-operative radiographs were obtained and considered normal (Figure 6).