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The effect of hydroxyapatite particle size on viscoelastic properties and calcium release from a thermosensitive triblock copolymer.
- Source :
-
Colloid & Polymer Science . Jan2017, Vol. 295 Issue 1, p107-115. 9p. - Publication Year :
- 2017
-
Abstract
- Well-defined 'smart' injectable hydrogel based on hydrophilic poly(ethylene glycol) (PEG) and hydrophobic poly(lactic acid-co-glycolic acid) (PLA/PGA) copolymer (PLGA-PEG-PLGA) gelling at the body temperature was modified by bioactive hydroxyapatite (HAp) in the form of micro-, nano-, and core-shell particles (μ-HAp, n-HAp, and CS-x, respectively) to be applicable as calcium delivery system in bone regeneration. Viscoelastic moduli increased with HAp content as expected. Whereas systems containing μ-HAp or CS-x particles maintained two sol-gel and gel-sol phase transitions, the n-HAp containing system showed only one sol-gel phase transition due to the strong interactions between polymer chain and the n-HAp surface. In vitro, studies proved the controlled uniform release of calcium cations from both CS-x and n-HAp over the 9-day period without any initial burst release. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0303402X
- Volume :
- 295
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Colloid & Polymer Science
- Publication Type :
- Academic Journal
- Accession number :
- 120531370
- Full Text :
- https://doi.org/10.1007/s00396-016-3983-7