Composite bilayered scaffolds with bio-functionalized ceramics for cranial bone defects : An in vivo evaluation

Arun Kumar Teotia, Deepak Bushan Raina, Hanna Isaksson, Magnus Tägil, Lars Lidgren, Jukka Seppälä, Ashok Kumar*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

Despite having substantial regenerative capabilities, bone regeneration in critical injuries may be insufficient and require an additional intervention. With advancements in material science and production technology it is now possible to generate complex scaffolds with controlled architectures for repairing these injuries. Additionally, these materials can be functionalized with bioactive molecules to enhance osteoinductivity. In the present work, we developed a multifunctional composite bilayered scaffold (BS), integrating a ceramic nanocement (NC) and macroporous composite scaffold (CG) for cranial injuries, mimicking bone architecture. The scaffolds were functionalized with recombinant human bone morphogenetic protein-2 (rhBMP-2) (BMP) (2 μg/scaffold) and zoledronic acid (ZA) (10 μg/scaffold).We hypothesized that the composite scaffolds would support proliferation of osteoblast progenitor cells and provide controlled release of loaded bioactive molecules to induce bone regeneration. Higher amounts of mineralized tissue (MT) deposition was observed with functionalized scaffolds 12 weeks post in vivo implantation in 8.5mm critical cranial defect in rats. Contrary to our expectations, BS + ZA functionalized scaffolds had highest MT deposition (13.9mm3), followed by CG + ZA + BMPwith 9.2mm3 and BS + ZA + BMPwith 7.6mm3 of MT deposition, all significantly higher than non-functionalized CG(7.2mm3) or BS (4.9mm3) scaffolds and the empty [Teotia et al 2017 ACS Appl. Mater. Interfaces, 9, 6816iV6828] groups. The results supported an osteopromotive multifunctional scaffold implantation in critical defects.

Original languageEnglish
Article number014002
Number of pages10
JournalMultifunctional Materials
Volume2
Issue number1
DOIs
Publication statusPublished - Mar 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • Bisphosphonates
  • Bone morphogenetic proteins
  • Ceramics
  • Cranioplasty
  • Multifunctional materials
  • Nano-hydroxyapatite

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  • Macroporous Hybrid Scaffolds

    Seppälä, J.

    01/02/201631/12/2018

    Project: Academy of Finland: Other research funding

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