Consistent quasistatic and acoustic elasticity determination of poly-L-lactide-based rapid-prototyped tissue engineering scaffolds

Krzysztof W. Luczynski , Tomasz Brynk , Barbara Ostrowska , Wojciech Święszkowski , Roland Reihsner , Christian Hellmich

Abstract

This paper is concerned with reliable and physically sound elasticity determination of rapid-prototyped tissue engineering scaffolds made of poly-L-lactide (PLLA), with and without small portions of tricalcium phosphate (TCP) inclusions. At the level of overall scaffolds, that is, that of several millimeters, multiple uniaxial loading–unloading (quasistatic) tests were performed, giving access to the scaffolds' Young's moduli, through stress–strain characteristics during unloading. In addition, acoustic tests with 0.05 MHz frequency delivered an independent access to elastic properties, in terms of the normal components of the scaffolds' stiffness tensors. The latter strongly correlate, in a linear fashion, with the Young's moduli from the unloading tests, revealing porosity independence of Poisson's ratio. The magnitude of the latter is in full agreement with literature data on polymers. Both of these facts underline that both ultrasound tests and quasistatic unloading tests reliably provide the elastic properties of tissue engineering scaffolds. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 101A:138–144, 2013.
Author Krzysztof W. Luczynski - [Technische Universitat Wien]
Krzysztof W. Luczynski,,
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, Tomasz Brynk (FMSE / DMD)
Tomasz Brynk,,
- Division of Materials Design
, Barbara Ostrowska (FMSE / DMD)
Barbara Ostrowska,,
- Division of Materials Design
, Wojciech Święszkowski (FMSE / DMD)
Wojciech Święszkowski,,
- Division of Materials Design
, Roland Reihsner - [Technische Universitat Wien]
Roland Reihsner,,
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, Christian Hellmich - [Technische Universitat Wien]
Christian Hellmich,,
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Journal seriesJournal of Biomedical Materials Research Part A, ISSN 1549-3296, [1552-4965]
Issue year2013
Vol101A
No1
Pages138-144
Publication size in sheets0.5
Keywords in Englishelastic energy, elasticity, PLLA scaffold, quasistatic unloading tests, ultrasound tests
ASJC Classification2506 Metals and Alloys; 2204 Biomedical Engineering; 2502 Biomaterials; 2503 Ceramics and Composites
DOIDOI:10.1002/jbm.a.34316
URL http://onlinelibrary.wiley.com/doi/10.1002/jbm.a.34316/abstract
Languageen angielski
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 35.0, 25-06-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 25-06-2020, ArticleFromJournal
Publication indicators Scopus Citations = 26; WoS Citations = 21; GS Citations = 14.0; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.111; WoS Impact Factor: 2013 = 2.841 (2) - 2013=3.16 (5)
Citation count*14 (2015-05-14)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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