Efficacy of rhBMP-2 loaded PCL/PLGA/β-TCP guided bone regeneration membrane fabricated by 3D printing technology for reconstruction of calvaria defects in rabbit

Biomed Mater. 2014 Nov 10;9(6):065006. doi: 10.1088/1748-6041/9/6/065006.

Abstract

We successfully fabricated a three-dimensional (3D) printing-based PCL/PLGA/β-TCP guided bone regeneration (GBR) membrane that slowly released rhBMP-2. To impregnate the GBR membrane with intact rhBMP-2, collagen solution encapsulating rhBMP-2 (5 µg ml(-1)) was infused into pores of a PCL/PLGA/β-TCP membrane constructed using a 3D printing system with four dispensing heads. In a release profile test, sustained release of rhBMP-2 was observed for up to 28 d. To investigate the efficacy of the GBR membrane on bone regeneration, PCL/PLGA/β-TCP membranes with or without rhBMP-2 were implanted in an 8 mm calvaria defect of rabbits. Bone formation was evaluated at weeks 4 and 8 histologically and histomorphometrically. A space making ability of the GBR membrane was successfully maintained in both groups, and significantly more new bone was formed at post-implantation weeks 4 and 8 by rhBMP-2 loaded GBR membranes. Interestingly, implantation with rhBMP-2 loaded GBR membranes led to almost entire healing of calvaria defects within 8 weeks.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Biocompatible Materials
  • Bone Morphogenetic Protein 2 / chemistry*
  • Bone Regeneration*
  • Bone and Bones / pathology*
  • Calcium Phosphates / chemistry*
  • Collagen / chemistry
  • Lactic Acid / chemistry*
  • Membranes, Artificial
  • Microscopy, Electron, Scanning
  • Osteogenesis
  • Polyesters / chemistry*
  • Polyglycolic Acid / chemistry*
  • Polylactic Acid-Polyglycolic Acid Copolymer
  • Printing, Three-Dimensional*
  • Rabbits
  • Recombinant Proteins / chemistry
  • Skull / drug effects*
  • Skull / pathology

Substances

  • Biocompatible Materials
  • Bone Morphogenetic Protein 2
  • Calcium Phosphates
  • Membranes, Artificial
  • Polyesters
  • Recombinant Proteins
  • beta-tricalcium phosphate
  • Polylactic Acid-Polyglycolic Acid Copolymer
  • polycaprolactone
  • Polyglycolic Acid
  • Lactic Acid
  • Collagen