NDLI: Investigation of the Morphology of the Lacunocanalicular System of Cortical Bone Using Atomic Force Microscopy

Content Provider	Springer Nature Link
Author	Reilly, Gwendolen C. Knapp, Helmut F. Stemmer, Andreas Niederer, Peter Kthe Tate, Melissa L.
Copyright Year	2001
Abstract	Mechanical loading has been implicated as a powerful driving mechanism for interstitial fluid flow through bone. However, little information is available with regard to the morphology of bone fluid spaces, e.g., the canalicular wall, which would be expected to dictate the type of flow regime developing in the lacunocanalicular system under mechanical loads. The purpose of this study was to examine the fine structure of the lacunocanalicular system in cortical bone using atomic force microscopy (AFM), resin casting methods, and selective etching of the specimen surface. A resincast replica of the canalicular wall was produced and surface morphology and dimensions were observed using AFM in tapping mode. Material contrast was obtained using surface potential measurements. A striped pattern perpendicular to the canaliculus long axis with a periodicity of 125 nm dominated the structure of the canalicular wall; it is likely that this was caused by the imprint of collagen fibrils arranged in parallel, lining the canaliculus wall. The largest dimension measured for canalicular diameter was on the order of 500 nm. The regular dips and ridges caused by the collagen that lines the wall are a source of roughness which may influence shear stresses imparted by the fluid on the cell surface as well as mixing of solutes within the lacunocanalicular system. In addition, the lacunocanalicular wall lining is likely to affect physicochemical interactions between the fluid and bone matrix. This has important implications for modeling and understanding the microfluid mechanics and rheology of the fluid-filled lacunocanalicular network. © 2001 Biomedical Engineering Society. PAC01: 8719Tt, 8764Dz
Starting Page	1074
Ending Page	1081
Page Count	8
File Format	PDF
ISSN	00906964
Journal	Annals of Biomedical Engineering
Volume Number	29
Issue Number	12
e-ISSN	15739686
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2001-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biochemistry Mechanics Biophysics/Biomedical Physics Vibration, Dynamical Systems, Control Biomedical Engineering
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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