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Arkudas, Andreas; Balzer, Amelie; Buehrer, Gregor; Arnold, Isabel; Hoppe, Alexander; Detsch, Rainer; Newby, Phillipa; Fey, Tobias; Greil, Peter; Horch, Raymund E; Boccaccini, Aldo R; Kneser, Ulrich
Tissue engineering. Part C, Methods, 06/2013, Letnik: 19, Številka: 6Journal Article
In this study, the angiogenetic effect of sintered 45S5 Bioglass® was quantitatively assessed for the first time in the arteriovenous loop (AVL) model. An AVL was created by interposition of a venous graft from the contralateral side between the femoral artery and vein in the medial thigh of eight rats. The loop was placed in a Teflon isolation chamber and was embedded in a sintered 45S5 Bioglass® granula matrix filled with fibrin gel. Specimens were investigated 3 weeks postoperatively by means of microcomputed tomography, histological, and morphometrical techniques. All animals tolerated the operations well. At 3 weeks, both microcomputed tomography and histology demonstrated a dense network of newly formed vessels originating from the AVL. All constructs were filled with cell-rich, highly vascularized connective tissue around the vascular axis. Analysis of vessel diameter revealed constant small vessel diameters, indicating immature new vessel sprouts. This study shows for the first time axial vascularization of a sintered 45S5 Bioglass® granula matrix. After 3 weeks, the newly generated vascular network already interfused most parts of the scaffolds and showed signs of immaturity. The intrinsic type of vascularization allows transplantation of the entire construct using the AVL pedicle.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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