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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.45  No.10 (2004)  >  pp.3060-3064

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Effect of Long-Term Formalin Preservation on Bending Properties and Fracture Toughness of Bovine Compact Bone

Hisao Kikugawa1) and Takashi Asaka2)
1) Department of Mechanical Engineering, School of Engineering II, Tokai University
2) Department of Applied Chemistry, School of Engineering, Tokai University

To precisely determine the mechanical properties of a bone, the effects of the preservation method on its mechanical properties need to be minimized. It seems likely that prolonged exposure to formalin (formaldehyde solution) will have some affect the mechanical properties of bone. This study investigated the effect of the formalin fixation method on the bending properties and fracture toughness of bovine cortical bone after short-term and relatively long-term preservation. To determine the elements and the quantities eluted from bone into formalin solution (the preservation medium), qualitative and quantitative analyses were performed by inductively coupled plasma atomic emission spectroscopy (ICP-AES). Formalin fixation augments the bending stiffness of the cortical bone while diminishing its fracture toughness. As the bending strength diminishes concurrently with removal of Ca2+, this implies that inorganic components of bone contribute to its bending strength.

bone, mechanical properties, fracture toughness, mechanical test, formalin preservation, eluted element analysis

Received: June 08, 2004
Accepted: August 17, 2004 , Published online: June 24, 2005
Copyright (c) 2005 The Japan Institute of Metals



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