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CHAPTER 10 III The Wing: Fracture Healing and Nonhealing 115

A

B C

Figure 10-18 • A, Orientation and close-up (B) ventrodorsal views of the right elbow of a snowy owl hit by a logging truck shows badly
displaced fractures of the proximal radius and ulna, which approach but do not enter the cubital joints. C, The uninjured left elbow is
provided for comparison.

operations. The period of clinical observation is and ultimately malunion. These images convey many
approximately 14 months. During this time, the injured valuable lessons, not the least of which is the toll
bones exhibited a wide variety of radiographic appear- extracted from the regional circulation and how this
ances, including delayed union, avascular necrosis, adversely affects fracture healing (Figures 10-18 to
nonpurposeful bone deposition, infection, nonunion, 10-23).

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