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Journal of Bioactive and Compatible Polymers
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Microporous Scaffolds from Poly(Lactide-Co-{epsilon}-Caprolactone) Composites with Hydroxyapatite and Tricalcium Phosphates Using Supercritical CO2 for Bone Tissue Engineering

Hali·l Murat Aydin

Chemical Engineering Department and Bioengineering Division, Hacettepe University, and TüBI·TAK, Center of Excellence: BI·YOMüH, Beytepe, 06532, Ankara, Turkey

Erhan Pi·ski·n

Chemical Engineering Department and Bioengineering Division, Hacettepe University, and TüBI·TAK, Center of Excellence: BI·YOMüH, Beytepe, 06532, Ankara, Turkeypiskin{at}hacettepe.edu.tr

Ayla Çalimli

Chemical Engineering Department, Ankara University, Tandog, 06100, Ankara, Turkey

A copolymer of L-lactide and {epsilon}-caprolactone (M n: 73,523, M w: 127,990 and PI: 1.74) was synthesized by ring-opening polymerization and confirmed by FTIR, 1 H-NMR and DSC. The copolymer ratio of L-lactide to {epsilon}-caprolactone, determined by 1H-NMR, was 89/11. Specific amounts of hydroxyapatite or tricalcium phosphate were blended in the copolymer matrix to form new composites. Films were made by solvent casting the copolymer and the composite materials. The films were subjected to supercritical CO2 at 3300psi and 70°C to create porous structures. The pore sizes were in the range of 40–80 µm. The porous films (both copolymer and composite) degraded in Ringer solutions much faster than corresponding untreated non-porous films.

Key Words: bone tissue engineering • microporous scaffolds • biodegradable copolymers • hydroxyapatite • tricalcium phosphates • supercritical CO2

Journal of Bioactive and Compatible Polymers, Vol. 19, No. 5, 383-394 (2004)
DOI: 10.1177/0883911504046688
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