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118 SECTION I III The Birds

A

B
Figure 10-21 • A, Immediate postoperative ventrodorsal close-up view of the owl’s second wing operation reveals a new strategy, one that

unfortunately will prove no more successful than the first. Here the objective is to immobilize the fractures by placing pins into the ulna

and nearby humerus, with the wing in maximal flexion, and then securing the implants to an exterior bar. B, A similar follow-up view made
1 month later shows localized medullary clouding, a phenomenon peculiar to birds in which new bone deposition is largely or exclusively
confi ned to the endosteum rather than the periosteum. It is important to recognize that these sorts of bone deposits may occur as a result
of a variety of stimuli and are nonspecifi c.

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