Abstract
Prospective randomized controlled animal model. The purpose of this study is to determine whether the readministration of human recombinant bone morphogenetic protein-2 (rhBMP-2) induces an immune response and inhibits successful fusion in repeat posterolateral spinal surgery. Little research has been performed on the effectiveness or immunoreactivity of rhBMP-2 (Infuse, Medtronic, Memphis, TN) in the context of its reuse in posterolateral fusion spinal surgery at adjacent levels. A total of 34 New Zealand White rabbits underwent posterior intertransverse process fusion with the use of rhBMP-2 delivered on an absorbable collagen sponge (rhBMP-2/ACS). Two rabbits were killed early leaving 32 total rabbits. Serologic studies (Type I bovine collagen and rhBMP-2 antibodies) were obtained at 2-week intervals throughout the experiment. At 10 weeks, posteroanterior radiographs confirmed solid fusion masses in all rabbits. The 32 rabbits were randomly separated into 2 groups of 16, and each group underwent an adjacent level, bilateral intertransverse process fusion with either rhBMP-2/ACS or iliac crest. There was no statistical difference in fusion rates with repeat use of rhBMP-2 (n = 15/16, 94%) or iliac crest (n = 11/16, 69%) (P = ...Continue Reading
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Aug 27, 2013·The Spine Journal : Official Journal of the North American Spine Society·Martin F HoffmannDebra L Sietsema
Sep 3, 2013·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Adel Al-AsfourChrister Dahlin
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