Journal
TISSUE ENGINEERING
Volume 12, Issue 5, Pages 1247-1259Publisher
MARY ANN LIEBERT INC
DOI: 10.1089/ten.2006.12.1247
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Funding
- NIBIB NIH HHS [T32EB00424] Funding Source: Medline
- NIGMS NIH HHS [R25 GM0066943] Funding Source: Medline
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The development of therapeutics for orthopedic clinical indications exploiting minimally invasive surgical techniques has substantial benefits, especially for treatment of fragility fractures in the distal radius of osteoporotics and vertebral compression fractures. We have designed six formulations of injectable polyurethane foams to address these clinical indications. The polyurethanes were prepared by mixing two liquid components and injecting the reactive liquid mixture into a mold where it hardens in situ. Porous polyurethane foams were synthesized from lysine methyl ester diisocyanate, a poly(epsilon-caprolactone-co-glycolide) triol, a tertiary amine catalyst, anionic and non-ionic stabilizers, and a fatty acid pore opener. The rise time of the foams varied from 8 - 20 min. The porosity was approximately 95% and the pores varied in size from 100 - 1000 mu m. The polyurethane foams supported attachment of viable (> 95%) MG-63 cells under dynamic seeding conditions. We anticipate compelling opportunities will be available as a consequence of the favorable biological and physical properties of the injectable polyurethane foams.
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