J Zoo Wildl Med.: Holding power of three different pin designs in the femur and ulna of the common buzzard (Buteo buteo).
Article Type: Reprint
Subject: Hawks (Health aspects)
Fractures (Care and treatment)
Authors: Lopez Garcia, M.
Lopez Beceiro, A.M.
Juarez, V.V.
Pub Date: 03/01/2012
Publication: Name: Journal of Avian Medicine and Surgery Publisher: Association of Avian Veterinarians Audience: Academic Format: Magazine/Journal Subject: Health Copyright: COPYRIGHT 2012 Association of Avian Veterinarians ISSN: 1082-6742
Issue: Date: March, 2012 Source Volume: 26 Source Issue: 1
Product: SIC Code: 3841 Surgical and medical instruments
Geographic: Geographic Scope: United States Geographic Code: 1USA United States
Accession Number: 288978090
Full Text: External skeletal fixation is generally considered the best stabilization technique for immobilizing avian long-bone fractures, but one of its major complications is the failure of bone fixation pin interface or the loss of holding power. Consequently, this study is aimed at elucidating which pin design offers more pull-out strength in certain bones of the common buzzard (Buteo buteo). To achieve this objective, 3 pin designs (a smooth design and 2 negative profile threaded designs, with different thread pitch) were placed in 5 positions along the femur and ulna of the common buzzard. The pin pull-out strength was measured with the purpose of comparing medullary and pneumatic bones, insertion sites, and pin designs. Threaded pins with a negative profile showed greater holding power than smooth pins (P < .05). When comparing holding power between the ulna and femur, no differences were found for smooth pins, whereas threaded pins showed more pull-out strength in the ulna than in the femur (P < .05). There were no differences observed related to pin location along the same bone when considering the same pin type. These results suggest that negative profile threaded pins have more holding power than smooth pins and that pneumatic bones provide less pull-out strength to negative profile threaded pins than medullary bones.

2011;42:552-557.
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