Department of Clinical Sciences
Contact Information: Email: firstname.lastname@example.org; Phone: 607-253-3060
Sponsor: American Kennel Club Canine Health Foundation
Grant Number: 01718-A
Title: Effect of Ulnar Ostectomy on Intra-articular Pressure Mapping of the Canine Elbow ex vivo
Annual Direct Cost: $11,150
Project Period: 03/01/2012-02/28/2013
DESCRIPTION (provided by applicant): We aim to test the normal intra-articular elbow joint contact pressures, to determine the effect of an experimentally induced radio-ulnar step, and then to evaluate the efficacy of one of the two surgical treatments for restoration of normal contact pressures. The two treatments tested are a proximal ulnar ostectomy with an IM pin (PUO) and a distal ulnar ostectomy with interosseous ligament release (DUO). A series of experiments will be performed: Paired, radiographically normal forelimbs of dogs euthanized for reasons unrelated to this study will be collected, soft tissues removed and instrumented as described in previous studies. A type II external skeletal fixator with linear motors will be applied to the intact radius. Real-time contact pressures within the medial and lateral elbow compartments will be measured using custom thin-film pressure sensors in a materials testing system at 200 N of cyclic axial load. After determination of normal contact pressures, a 1.5 mm radial ostectomy is performed and the radius shortened with the external fixator and linear motors, after which contact pressures will be acquired again. Legs will then be randomized into treatment groups (PUO or DUO), the surgery performed, followed by pressure data acquisition in the same manner.