Constitutive models of bone graft

A successful technique for revision hip replacement (after one or more failures) uses morsellised (ground up) human allograft bone which is compacted into bone defects to replace the lost bone.

Our research has focused on understanding the mechanical behaviour of bone graft through direct shear and confined compression experiments. A comprehensive constitutive model for morsellised cortico-cancellous bone has been developed permitting realistic material modelling of graft in finite element analyses. The studies also provide specific practical suggestions to the surgeons on graft preparation and the impaction technique [1].

 

References:

  1. Phillips ATM, Pankaj, Brown DT, Oram TZ, Howie CR, Usmani AS, 2006, The elastic properties of morsellised cortico-cancellous bone graft are dependent on its prior loading, JOURNAL OF BIOMECHANICS, Vol: 39, Pages: 1517-1526, ISSN: 0021-9290
A figure showing a three-dimensional rendered view of the device used to test the material properties of MCB bone graft
Fig.1: Rendered view of the in-vitro test apparatus, used to develop the constitutive model for morsellised cortico-cancellous bone.the
A figure showing the schematic representation of the in-vitro test apparatus
Fig.2: Schematic representation of the in-vitro test apparatus.