Enhanced cell ingrowth and proliferation through three-dimensional nanocomposite scaffolds with controlled pore structures

Kee Won Lee, Shanfeng Wang, Mahrokh Dadsetan, Michael J Yaszemski, Lichun Lu

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

We present enhanced cell ingrowth and proliferation through cross-linked three-dimensional (3D) nanocomposite scaffolds fabricated using poly(propylene fumarate) (PPF) and hydroxyapatite (HA) nanoparticles. Scaffolds with controlled internal pore structures were produced from computer-aided design (CAD) models and solid freeform fabrication (SFF) technique, while those with random pore structures were fabricated by a NaCl leaching technique for comparison. The morphology and mechanical properties of scaffolds were characterized using scanning electron microscopy (SEM) and mechanical testing, respectively. Pore interconnectivity of scaffolds was assessed using X-ray microcomputed tomography (micro-CT) and 3D imaging analysis. In vitro cell studies have been performed using MC3T3-E1 mouse preosteoblasts and cultured scaffolds in a rotating-wall-vessel bioreactor for 4 and 7 days to assess cell attachment, viability, ingrowth depth, and proliferation. The mechanical properties of crosslinked nanocomposite scaffolds were not significantly different after adding HA or varying pore structures. However, pore interconnectivity of PPF/HA nanocomposite scaffolds with controlled pore structures has been significantly increased, resulting in enhanced cell ingrowth depth 7 days after cell seeding. Cell attachment and proliferation are also higher in PPF/HA nanocomposite scaffolds. These results suggest that cross-linked PPF/HA nanocomposite scaffolds with controlled pore structures may lead to promising bone tissue engineering scaffolds with excellent cell proliferation and ingrowth.

Original languageEnglish (US)
Pages (from-to)682-689
Number of pages8
JournalBiomacromolecules
Volume11
Issue number3
DOIs
StatePublished - Mar 8 2010

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Pore structure
Scaffolds
Nanocomposites
Durapatite
Hydroxyapatite
Fumarates
Propylene
Layered manufacturing
Tissue Scaffolds
Mechanical properties
Mechanical testing
Cell proliferation
Scaffolds (biology)
Bioreactors
Tissue engineering
Leaching
Tomography
Polypropylenes
Computer aided design
Bone

ASJC Scopus subject areas

  • Bioengineering
  • Biomaterials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Enhanced cell ingrowth and proliferation through three-dimensional nanocomposite scaffolds with controlled pore structures. / Lee, Kee Won; Wang, Shanfeng; Dadsetan, Mahrokh; Yaszemski, Michael J; Lu, Lichun.

In: Biomacromolecules, Vol. 11, No. 3, 08.03.2010, p. 682-689.

Research output: Contribution to journalArticle

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