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Volume 30 , Issue 3
May/June 2015

Pages 512-518

Biochemical Responses of Anodized Titanium Implants with a Poly(lactide-co-glycolide)/Bone Morphogenic Protein-2 Submicron Particle Coating. Part 1: An In Vitro Study

Soo-Yeon Yoo, DDS, MSD/Seong-Kyun Kim, DDS, MSD, PhD/Seong-Joo Heo, DDS, MSD, PhD/Jai-Young Koak, DDS, MSD, PhD/Joo-Hee Lee, DDS, MSD, PhD/Ji-Man Park, DDS, PhD

PMID: 26009901
DOI: 10.11607/jomi.3701a

Purpose: This study was conducted to examine the effects of coating poly(D,L-lactide-co-glycolide) (PLGA)/recombinant human bone morphogenetic protein-2 (rhBMP-2) submicron particles by electrospray onto titanium (Ti) implants on the proliferation and differentiation capacity of mesenchymal stem cells. In addition, the duration of rhBMP-2 release was investigated. Materials and Methods: Ti disks were fabricated and divided into four groups as follows. Group C (control) was anodized at 300 V, group P was anodized and then coated with 0.2% PLGA, group B1 was anodized and then coated with PLGA/rhBMP-2 submicron particles at 200 ng per disk, and group B2 was anodized and then coated with PLGA/rhBMP-2 submicron particles at 600 ng per disk. The topography of the PLGA/rhBMP-2–coated Ti surfaces was examined, and proliferation assays, alkaline phosphatase activity tests, and rhBMP-2 releasing tests were conducted in vitro. Results: There was no difference in the roughness of control Ti disks and Ti disks coated with PLGA/rhBMP-2 submicron particles by electrospray. The proliferation of mesenchymal stem cells increased over time; at 7 days, cell proliferation on the Ti disks coated with rhBMP-2 was significantly higher than the other groups. Anodized Ti disks coated with PLGA/rhBMP-2 (groups B1 and B2) released rhBMP-2 for approximately 21 days. In accordance with the amount of rhBMP-2 released from the PLGA/rhBMP-2 construct, the differentiation capacity of mesenchymal stem cells on the PLGA/rhBMP-2–coated disks was increased significantly. Conclusion: Submicron PLGA/rhBMP-2 coating on Ti implants by electrospray facilitated cell proliferation and differentiation, which is important for early healing and integration of implants.

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