title: Fracture properties of growth plate cartilage compared to cortical and trabecular bone in ovine femora.
abstract: Fracture mechanical parameters (notch tensile strength, specific fracture energy/crack resistance and specific crack initiation energy) of epiphyseal plate cartilage, trabecular bone (metaphysis) and cortical bone (diaphysis) were determined on ovine femur specimens. The fracture behaviour before and after crack initiation was recorded in force-displacement diagrams from wedge splitting tests. Crack propagation was stable both during and after the formation of a principal crack. This is the main advantage of the wedge-splitting method by Tschegg in comparison with tensile tests. Microscopy of the epiphyseal plate during fracture showed fibre elongation and tearing in the crack tip region. The results of this study can help to understand the mechanics of epiphyseal plate injuries and the obtained values can be used for computational simulations and models.
authors.affiliation: Institute for Building Construction and Technology E-206-4, Vienna University of Technology, Karlsplatz 13, 1040 Vienna, Austria. elmar.tschegg@tuwien.ac.at
authors.forename: E K
authors.initials: EK
authors.lastname: Tschegg
authors.forename: A
authors.initials: A
authors.lastname: Celarek
authors.forename: S F
authors.initials: SF
authors.lastname: Fischerauer
authors.forename: S
authors.initials: S
authors.lastname: Stanzl-Tschegg
authors.forename: A M
authors.initials: AM
authors.lastname: Weinberg
mesh_terms: D000818:Animals; D002356:Cartilage / Q000293:injuries*; D005269:Femur / Q000293:injuries*; D050723:Fractures, Bone; D008422:Materials Testing / Q000295:instrumentation / Q000379:methods*; D000072042:Salter-Harris Fractures; D012756:Sheep; D013718:Tensile Strength