Fracture properties of bovine tibial bone

Moyle, D.D.; Gavens, A.J.

doi:10.1016/0021-9290(86)90187-9

Cited by 30 publications

(7 citation statements)

References 20 publications

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“…[21][22][23] In our study, the tubule apertures were aligned at the initial crack tip providing the required microscopic discontinuities for the start of crack propagation.…”

Section: Discussionmentioning

confidence: 99%

“…Some earlier studies indicate that the radius of the initial crack tip has little effect on the measurement of fracture toughness, and these studies thus postulated that crack propagation starts from microscopic discontinuities at the periphery of the initial crack. [21][22][23] In our study, the tubule apertures were aligned at the initial crack tip providing the required microscopic discontinuities for the start of crack propagation.…”

Section: Discussionmentioning

confidence: 99%

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Fracture toughness of human dentin

Iwamoto

Ruse²

2003

J Biomedical Materials Res

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The purpose of this study was to determine the fracture toughness (K(IC)) of human dentin and to test the null hypothesis that K(IC) is not affected by the orientation of dentinal tubules relative to the plane of crack propagation. Triangular prisms (4 x 4 x 4 x 8 mm) were obtained from human molars and tested using the notchless triangular prism (NTP) specimen K(IC) test. Dentin prisms were prepared so that the plane of crack propagation would have three different orientations relative to the orientation of dentinal tubules: perpendicular (PE), parallel aligned (PAA), and parallel transverse (PAT). The prepared specimens were secured in the specimen holder and loaded in tension until fracture or crack arrest. The maximum load recorded was used to calculate K(IC). There was no significant difference between the K(IC) of PAA specimens (1.97 +/- 0.17 MPa/m(1/2)) and PAT (2.02 +/- 0.18 MPa/m(1/2)). The K(IC) for the PE specimens (1.13 +/- 0.36 MPa/m(1/2)) was significantly lower. The SEM images of the fractured surfaces showed distinct differences that were correlated with the determined K(IC) values. The fractured surfaces of PAA and PAT specimens were rougher compared to PE specimens. Both the hyper mineralized peritubular dentin and the orientation of collagen fibrils surrounding the tubules could be responsible for the significant differences in K(IC). The results of this study identified a significant anisotropy of dentin with respect to its K(IC).

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“…[21][22][23] In our study, the tubule apertures were aligned at the initial crack tip providing the required microscopic discontinuities for the start of crack propagation.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Fracture toughness of human dentin

Iwamoto

Ruse²

2003

J Biomedical Materials Res

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“…Using the critical distance method and the experimental results for two groups of data, α=0.3 was estimated which is therefore comparable with the Coulomb-Mohr constant. Fracture properties of bone vary in a wide range according to the literature [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The variation in fracture properties stems from the different testing conditions and different types of bone is used.…”

Section: Discussionmentioning

confidence: 99%

“…Some research has been performed to obtain the critical crack length of bone. In the literature the critical crack size of bone has been found to vary between 0.3mm and 1.8mm [10,12,15,16]. Bonfield and Datta [10] looked at tensile specimens of bovine femora containing transverse cracks on the edge and centre.…”

Section: Discussionmentioning

confidence: 99%

“…The critical crack length perpendicular to the tensile stress axis was determined to be 0.36mm at the strain rate of 7×10 -6 to 3×10 -2 sec -1 . Moyle and Gavens [12] analysed bovine plexiform tibia with different crack lengths (4-12mm) and tip radii in transverse direction. They found the critical crack length to be 1.8 mm but Kc was overestimated about 11.2MNm -1/2 .…”

Section: Discussionmentioning

confidence: 99%

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Simulation of bone indentation

Kasiri¹,

Reilly²,

Taylor³

2007

Modelling in Medicine and Biology VII

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Finite Element (FE) methods have been widely used to model fractures. The Theory of Critical Distances (TCD) was proposed to predict the fatigue fracture of materials. With the introduction of FE models, this theory has been developed and extensively applied to different materials. FE models of fractures usually need a high resolution meshing or remeshing due to introducing new cracks. This can be a disadvantage, e.g. when the fracture plane of the material is under compression. In this paper the TCD was adopted to predict the multiaxial fracture of bone with the aim of studying the effects of geometry on fracture force.

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Fracture toughness of bone using a compact sandwich specimen: Effects of sampling sites and crack orientations

Wang

Agrawal

1996

J. Biomed. Mater. Res.

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The energy required to propagate a crack through bone can be estimated in terms of its fracture toughness, which is an intrinsic property and an important measure of the material's susceptibility to fracture. However, in the past detailed fracture toughness characterization of bone has been limited due to specimen size limitations. To address this issue the present study used a compact sandwich specimen and examined the variation in fracture toughness of bovine femoral bone as a function of testing sites and crack orientations. Two crack orientations, radial and circumferential, and three testing sites situated along the thickness of bone were investigated. The results indicated that there were statistically significant differences in fracture toughness between the testing sites for both radial and circumferencial cracks. Crack orientation also appeared to influence the fracture toughness at two of the test sites. The microstructure of bone and its fracture surface morphology were examined using microscopy and exhibited differences corresponding to the differences in fracture toughness, thus suggesting a correlation between microstructure and fracture toughness.

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Fracture properties of bovine tibial bone

Cited by 30 publications

References 20 publications

Fracture toughness of human dentin

Fracture toughness of human dentin

Simulation of bone indentation

Fracture toughness of bone using a compact sandwich specimen: Effects of sampling sites and crack orientations

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