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- W2002399504 abstract "Porous biodegradable poly(DL-lactic-co-glycolic acid) foams were seeded with rat marrow stromal cells and implanted into the rat mesentery to investigate in vivo bone formation at an ectopic site. Cells were seeded at a density of 6.83 × 105 cells/cm2 onto polymer foams having pore sizes ranging from either 150 to 300 or 500 to 710 μm and cultured for 7 days in vitro prior to implantation. The polymer/cell constructs were harvested after 1, 7, 28, or 49 days in vivo and processed for histology and gel permeation chromatography. Visual observation of hematoxylin and eosin–stained sections and von Kossa–stained sections revealed the formation of mineralized bonelike tissue in the constructs within 7 days postimplantation. Ingrowth of vascular tissue was also found adjacent to the islands of bone, supplying the necessary metabolic requirements to the newly formed tissue. Mineralization and bone tissue formation were investigated by histomorphometry. The average penetration depth of mineralized tissue in the construct ranged from 190 ± 50 μm for foams with 500–710-μm pores to 370 ± 160 μm for foams with 150–300-μm pores after 49 days in vivo. The mineralized bone volume per surface area and total bone volume per surface area had maximal values of 0.028 ± 0.021 mm (500–710-μm pore size, day 28) and 0.038 ± 0.024 mm (150–300-μm, day 28), respectively. As much as 11% of the foam volume penetrated by bone tissue was filled with mineralized tissue. No significant trends over time were observed for any of the measured values (penetration depth, bone volume/surface area, or percent mineralized bone volume). These results suggest the feasibility of bone formation by osteoblast transplantation in an orthotopic site where not only bone formation from transplanted cells but also ingrowth from adjacent bone may occur. © 1997 John Wiley & Sons, Inc. J Biomed Mater Res, 36, 1–8 1997." @default.
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- W2002399504 date "1997-07-01" @default.
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- W2002399504 title "Student research award in the doctoral degree candidate category, Society for Biomaterials 23rd Annual Meeting, New Orleans, LA, April 30-May 4, 1997: Ectopic bone formation by marrow stromal osteoblast transplantation using poly(DL-lactic-co-glycolic acid) foams implanted into the rat mesentery" @default.
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- W2002399504 doi "https://doi.org/10.1002/(sici)1097-4636(199707)36:1<1::aid-jbm1>3.0.co;2-p" @default.
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