J Korean Assoc Maxillofac Plast Reconstr Surg.  2008 Jul;30(4):323-332.

Bone tissue engineering using PLLA/HA composite scaffold and bone marrow mesenchymal stem cell

• Kim B
• Jang H
• Rim J
• Lee E
• Kim D

Abstract

AIM OF THE STUDY: Scaffolds are crucial to tissue engineering/regeneration. Biodegradable polymer/ceramic composite scaffolds can overcome the limitations of conventional ceramic bone substitutes such as brittleness and difficulty in shaping. In this study, poly(L-lactide)/hydroxyapatite(PLLA/HA) composite scaffolds were fabricated for in vivo bone tissue engineering. MATERIAL & METHODS: In this study, PLLA/HA composite microspheres were prepared by double emulsion- solvent evaporation method, and were evaluated in vivo bone tissue engineering. Bone marrow mesenchymal stem cell from rat iliac crest was differentiated to osteoblast by adding osteogenic medium, and was mixed with PLLA/HA composite scaffold in fibrin gel and was injected immediately into rat cranial bone critical size defect(CSD:8mm in diameter). At 1. 2, 4, 8 weeks after implantation, histological analysis by H-E staining, histomorphometric analysis and radiolographic analysis were done. RESULTS: BMP-2 loaded PLLA/HA composite scaffolds in fibrin gel delivered with osteoblasts differentiated from bone marrow mesenchymal stem cells showed rapid and much more bone regeneration in rat cranial bone defects than control group. CONCLUSION: This results suggest the feasibility and usefulness of this type of scaffold in bone tissue engineering.

Keyword

Bone marrow mesenchymal stem cell; Bone regeneration; Bone tissue engineering; Poly(Llactide)/ hydroxyapatite(PLLA/HA) composite scaffolds

MeSH Terms

Animals
Bone and Bones
Bone Marrow
Bone Regeneration
Bone Substitutes
Ceramics
Durapatite
Fibrin
Mesenchymal Stromal Cells
Microspheres
Osteoblasts
Rats
Bone Substitutes
Ceramics
Durapatite
Fibrin