Three-Dimensional Electrodeposition of Calcium Phosphates on Porous Nanofibrous Scaffolds and Their Controlled Release of Calcium for Bone Regeneration

ACS Appl Mater Interfaces. 2020 Jul 22;12(29):32503-32513. doi: 10.1021/acsami.0c11003. Epub 2020 Jul 13.

Abstract

To mimic the bone matrix of mineralized collagen and to impart microporous structure to facilitate cell migration and bone regeneration, we developed a nanofibrous (NF) polymer scaffold with highly interconnected pores and three-dimensional calcium phosphate coating utilizing an electrodeposition technique. The mineral content, morphology, crystal structure, and chemical composition could be tailored by adjusting the deposition temperature, voltage, and duration. A higher voltage and a higher temperature led to a greater rate of mineralization. Furthermore, nearly linear calcium releasing kinetics was achieved from the mineralized 3D scaffolds. The releasing rate was controlled by varying the initial electrodeposition conditions. A higher deposition voltage and temperature led to slower calcium release, which was associated with the highly crystalline and stoichiometric hydroxyapatite content. This premineralized NF scaffold enhanced bone regeneration over the control scaffold in a subcutaneous implantation model, which was associated with released calcium ions in facilitating osteogenic cell proliferation.

Keywords: bone regeneration; calcium phosphate; nanofibrous; proliferation; three-dimensional.

MeSH terms

  • Animals
  • Biocompatible Materials / chemistry*
  • Bone Regeneration*
  • Calcium / chemistry
  • Calcium / metabolism*
  • Calcium Phosphates / chemistry*
  • Cells, Cultured
  • Electroplating*
  • Male
  • Mice
  • Mice, Nude
  • Particle Size
  • Porosity
  • Rabbits
  • Surface Properties

Substances

  • Biocompatible Materials
  • Calcium Phosphates
  • Calcium