In vitro/in vivo biocompatibility and mechanical properties of bioactive glass nanofiber and poly(epsilon-caprolactone) composite materials.
In this study, a poly(epsilon-caprolactone) (PCL)/bioactive glass (BG) nanocomposite was fabricated using BG nanofibers (BGNFs) and compared with an established composite fabricated using microscale BG particles. The BGNFs were generated using sol-gel precursors via the electrospinning process, chopped into short fibers and then incorporated into the PCL organic matrix by dissolving them in a tetrahydrofuran solvent. The biological and mechanical properties of the PCL/BGNF composites were evaluated and compared with those of PCL/BG powder (BGP). Because the PCL/BG composite containing 20 wt % BG showed the highest level of alkaline phosphatase (ALP) activity, all evaluations were performed at this concentration except for that of the ALP activity itself. In vitro cell tests using the MC3T3 cell line demonstrated the enhanced biocompatibility of the PCL/BGNF composite compared with the PCL/BGP composite. Furthermore, the PCL/BGNF composite showed a significantly higher level of bioactivity compared with the PCL/BGP composite. In addition, the results of the in vivo animal experiments using Sprague-Dawley albino rats revealed the good bone regeneration capability of the PCL/BGNF composite when implanted in a calvarial bone defect. In the result of the tensile test, the stiffness of the PCL/BG composite was further increased when the BGNFs were incorporated. These results indicate that the PCL/BGNF composite has greater bioactivity and mechanical stability when compared with the PCL/BG composite and great potential as a bone regenerative material.
Department of Materials Science and Engineering, Seoul National University, Seoul, Korea.
Ji-Hoon
JH
Jo
Eun-Jung
EJ
Lee
Du-Sik
DS
Shin
Hyoun-Ee
HE
Kim
Hae-Won
HW
Kim
Young-Hag
YH
Koh
Jun-Hyeog
JH
Jang
D016475:3T3 Cells; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D001861:Bone Regeneration / Q000502:physiology; D001842:Bone and Bones / Q000166:cytology / Q000502:physiology; D055119:Elastic Modulus; D005898:Glass / Q000737:chemistry*; D008422:Materials Testing; D051379:Mice; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D010006:Osteoblasts / Q000166:cytology / Q000378:metabolism; D011091:Polyesters / Q000737:chemistry*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength
D001672:Biocompatible Materials; D011091:Polyesters; C016240:polycaprolactone