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Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_8 | Pages 41 - 41
1 Apr 2017
Dolkart O Yehuda H Zarfati Y Brosh T Chechik O Maman E
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Background

The effect of corticosteroids on tendon properties is poorly understood, and current data are insufficient and conflicting. The objective of this study was to evaluate the effects of corticosteroids injection on intact and injured rotator cuff (RC) through biomechanical and radiographic analyses in a rat model.

Methods

70 rats were assigned to seven groups:1)control - saline injection;2) no tear + single methylprednisolone acetate (MTA) injection; 3) no tear + triple MTA injection; 4) tear + single saline injection; 5) tear + single MTA injection; 6) tear+ triple saline injections; 7) tear+ triple MTA injections. Triple injections were repeated once a week. Following unilateral supraspinatus (SSP) injuries, MTA was injected subacromialy. Rats were sacrificed 1 week after last injection. Shoulders were harvested, grossly inspected, SSP was evaluated biomechanically. Bone density at the tendon insertion site on the greater tuberosity (GT) were assessed with micro-computed tomography (CT).