Effects of fiber orientation on the frictional properties and damage of regenerative articular cartilage surfaces
File(s)Accardi-TissueEngA-2013-accver.docx (1.01 MB)
Accepted version
Author(s)
Type
Journal Article
Abstract
Articular cartilage provides a low-friction, wear-resistant surface for diarthrodial joints. Due to overloading and overuse, articular cartilage is known to undergo significant wear and degeneration potentially resulting in osteoarthritis (OA). Regenerative medicine strategies offer a promising solution for the treatment of articular cartilage defects and potentially localized early OA. Such strategies rely on the development of materials to restore some aspects of cartilage. In this study, microfibrous poly(ɛ-caprolactone) scaffolds of varying fiber orientations (random and aligned) were cultured with bovine chondrocytes for 4 weeks in vitro, and the mechanical and frictional properties were evaluated. Mechanical properties were quantified using unconfined compression and tensile testing techniques. Frictional properties were investigated at physiological compressive strains occurring in native articular cartilage. Scaffolds were sheared along the fiber direction, perpendicular to the fiber direction and in random orientation. The evolution of damage as a result of shear was evaluated via white light interferometry and scanning electron microscopy. As expected, the fiber orientation strongly affected the tensile properties as well as the compressive modulus of the scaffolds. Fiber orientation did not significantly affect the equilibrium frictional coefficient, but it was, however, a key factor in dictating the evolution of surface damage on the surface. Scaffolds shear tested perpendicular to the fiber orientation displayed the highest surface damage. Our results suggest that the fiber orientation of the scaffold implanted in the joint could strongly affect its resistance to damage due to shear. Scaffold fiber orientation should thus be carefully considered when using microfibrous scaffolds.
Date Issued
2013-07-27
Date Acceptance
2013-07-01
Citation
Tissue Engineering: Parts A, B, and C, 2013, 19 (19-20), pp.2300-2310
ISSN
1937-3368
Publisher
Mary Ann Liebert
Start Page
2300
End Page
2310
Journal / Book Title
Tissue Engineering: Parts A, B, and C
Volume
19
Issue
19-20
Copyright Statement
© 2013 Mary Ann Liebert, Inc.. Final publication is available from Mary Ann Liebert, Inc., publishers htps://dx.doi.org/10.1089/ten.tea.2012.0580
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000323933400022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
EP/G026114/1
Subjects
Science & Technology
Life Sciences & Biomedicine
Cell & Tissue Engineering
Biotechnology & Applied Microbiology
Cell Biology
BIOTECHNOLOGY & APPLIED MICROBIOLOGY
CELL & TISSUE ENGINEERING
CELL BIOLOGY
CHONDROCYTE TRANSPLANTATION GRAFTS
SOFT ROUGH CONTACTS
NANOFIBROUS SCAFFOLDS
ELECTROSPUN SCAFFOLDS
FIBROUS SCAFFOLDS
IN-VIVO
MATRIX
LUBRICATION
DIFFERENTIATION
COMPRESSION
Publication Status
Published