{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T16:32:06Z","timestamp":1774542726082,"version":"3.50.1"},"reference-count":54,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2005,3,3]],"date-time":"2005-03-03T00:00:00Z","timestamp":1109808000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Biomedical Materials Res"],"published-print":{"date-parts":[[2005,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Tympanoplasty operations to improve hearing impairment require a wide middle ear cavity and reconstruction of columellar formations. There is no specific material for use in the reconstruction of columellar formations. Tissue response to BMP has been employed as regenerative material. To our knowledge, however, there are no reports of the reconstruction of columellar formations using recombinant human bone morphogenetic protein\u20102\/bovine collagen composites in the middle ear. The purpose of this study is to investigate whether recombinant human bone morphogenetic protein\u20102\/bovine collagen composites (rhBMP\u20102 composites) are appropriate for use as regenerative material for tympanoplasty. In the form of pellets, rhBMP\u20102 composites were implanted as columellae into the tympanic cavity. At 2, 4, 6, 8, and 12 weeks after surgery, the middle ear of the animals (n = 4 at each week) was stained with hematoxylin\u2010eosin for light microscopic observation. All composites were in the process of ossification or had ossified according to their developmental stages and were covered with a single layer of squamous or cuboidal epithelium. The new bone formed in these composites was persistently stable and displayed some columellar conditions assessed by histological examination. This study led to the conclusion that rhBMP\u20102 composites make excellent regenerative material for auditory ossicles. \u00a9 2005 Wiley Periodicals, Inc. 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