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Micro‐Nanostructures of Cellulose‐Collagen for Critical Sized Bone Defect Healing
Author(s) -
Aravamudhan Aja,
Ramos Daisy M.,
Nip Jonathan,
Kalajzic Ivo,
Kumbar Sangamesh G.
Publication year - 2018
Publication title -
macromolecular bioscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.924
H-Index - 105
eISSN - 1616-5195
pISSN - 1616-5187
DOI - 10.1002/mabi.201700263
Subject(s) - materials science , polymer , stromal cell , nanostructure , regeneration (biology) , biodegradable polymer , biomedical engineering , bone healing , tissue engineering , matrix (chemical analysis) , bone tissue , nanotechnology , chemical engineering , chemistry , composite material , anatomy , microbiology and biotechnology , medicine , engineering , pathology , biology
Bone tissue engineering strategies utilize biodegradable polymeric matrices alone or in combination with cells and factors to provide mechanical support to bone, while promoting cell proliferation, differentiation, and tissue ingrowth. The performance of mechanically competent, micro‐nanostructured polymeric matrices, in combination with bone marrow stromal cells (BMSCs), is evaluated in a critical sized bone defect. Cellulose acetate (CA) is used to fabricate a porous microstructured matrix. Type I collagen is then allowed to self‐assemble on these microstructures to create a natural polymer‐based, micro‐nanostructured matrix (CAc). Poly (lactic‐co‐glycolic acid) matrices with identical microstructures serve as controls. Significantly higher number of implanted host cells are distributed in the natural polymer based micro‐nanostructures with greater bone density and more uniform cell distribution. Additionally, a twofold increase in collagen content is observed with natural polymer based scaffolds. This study establishes the benefits of natural polymer derived micro‐nanostructures in combination with donor derived BMSCs to repair and regenerate critical sized bone defects. Natural polymer based materials with mechanically competent micro‐nanostructures may serve as an alternative material platform for bone regeneration.

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