Interfacial fracture toughness between bovine cortical bone and cements

Lucksanasombool, P.; Higgs, W. A. J.; Higgs, R. J. E. D.; Swain, Michael V.

doi:10.1016/s0142-9612(02)00464-7

Cited by 34 publications

(37 citation statements)

References 33 publications

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“…The uniaxial test, as described within this manuscript, overwhelmingly tested mode II failure (high phase angle) and suffers from the same limitations of all pull-out and push-out tests; namely, the measured interfacial adhesion strength is dominated by surface roughness and failure to account for the mismatch of the elastic modulus across the interface. 61 This results in sensitivity to sample configuration and significant variance in the measured shear strength. To avoid these limitations, fracture mechanics approaches have been used to measure interfacial bonding.…”

Section: Pull-out Strengthmentioning

confidence: 99%

“…Therefore, end-point failure tests may neither be the most sensitive nor physiologically relevant, since they select for only the strongest contact area and do not measure the true interfacial adhesion strength. 61 In contrast, interfacial fatigue testing would allow for sensitive monitoring of the elastic stiffness over the entire region, and give a more accurate indication of the fracture toughness.…”

Section: Pull-out Strengthmentioning

confidence: 99%

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Peri‐implant bone formation and implant integration strength of peptide‐modified p(AAM‐co‐EG/AAC) interpenetrating polymer network‐coated titanium implants

Barber

Ranieri

et al. 2006

J Biomedical Materials Res

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Interpenetrating polymer networks (IPNs) of poly (acrylamide-co-ethylene glycol/acrylic acid) functionalized with an -Arg-Gly-Asp- (RGD) containing 15 amino acid peptides, derived from rat bone sialoprotein (bsp-RGD(15), were grafted to titanium implants in an effort to modulate bone formation in the peri-implant region in the rat femoral ablation model. Bone-implant contact (BIC) and bone formation within the medullary canal were determined using microcomputed tomography at 2 and 4 weeks postimplantation. BIC for bsp-RGD(15)-IPN implants was enhanced relative to hydroxyapatite tricalcium phosphate (HA-TCP) coated implants, but was similar to all other groups. Aggregate bone formation neither indicated a dose-dependent effect of bsp-RGD(15) nor a meaningful trend. Mechanical testing of implant fixation revealed that only the HA-TCP coated implants supported significant (>1 MPa) interfacial shear strength, despite exhibiting lower overall BIC, an indication that bone ingrowth into the rougher coating was the primary mode of implant fixation. While no evidence was found to support the hypothesis that bsp-RGD(15)-modified IPN coated implants significantly impacted bone-implant bonding, these results point to the lack of correlation between in vitro studies employing primary osteoblasts and in vivo wound healing in the peri-implant region.

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Section: Pull-out Strengthmentioning

confidence: 99%

Section: Pull-out Strengthmentioning

confidence: 99%

Peri‐implant bone formation and implant integration strength of peptide‐modified p(AAM‐co‐EG/AAC) interpenetrating polymer network‐coated titanium implants

Barber

Ranieri

et al. 2006

J Biomedical Materials Res

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show abstract

“…This test has been used in a number of investigations to determine the bonding properties of interfaces [26][27][28][29] and was selected here because it allowed us to evaluate the interfacial fracture energy. [30] The tests were performed using a universal testing machine with a crosshead speed of 50 mm/min.…”

Section: Mechanical Testingmentioning

confidence: 99%

Contributions to the interfacial adhesion in co-sintered bilayers

Boonyongmaneerat

Schuh

2006

Metall Mater Trans A

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The adhesive strength of co-sintered bilayers is influenced by several factors, including the nature of bonding along the joined interface, residual stresses evolved during processing, and the sintered properties of the individual layers. Here these separate contributions are isolated through careful control of the co-sintering process for W/Al 2 O 3 bilayers, and in particular through control of the W-layer properties by using the process of activated sintering. Four-point bending delamination tests are used to evaluate adhesion and strength of the bilayers, and the interfacial fracture mechanics of the system is numerically studied using finite element simulations. Improvements in sintered density are found to increase the adhesive strength of the system only up to a point, beyond which shrinkage mismatch compromises the intrinsic toughness of the interface.

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“…Materials scientists are increasingly interested in fractures at the interface between two dissimilar materials, because they are fundamental for understanding thin-film coatings [Hutchinson and Suo 1992;Diao and Kato 1994;Mishnaevsky and Gross 2005], electronic packaging, adhesion [Straffelini 2001;Packham 2003], and composites and biomaterials [Wang and Agrawal 2000;Lucksanasombool et al 2003]. Experiments cumulatively show that the waviness at the interface profoundly effects interfacial crack propagation.…”

Section: Introductionmentioning

confidence: 99%

“…Previously, serrations and hackles were modeled by first identifying a scalar material parameter with the interfacial roughness and then investigating its effect on interfacial fracture and strength [Cao and Evans 1989;Ramulu et al 2001;Lucksanasombool et al 2003;Packham 2003]. Because the method is simple, it fails to capture micromechanical and microgeometric details at the interface and around the crack's tip.…”

Section: Introductionmentioning

confidence: 99%

Serration effects on interfacial cracks

Pelegri¹,

Shan

2007

JOMMS

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To investigate the effect of serrations in an interfacial crack between dissimilar materials, we introduce into the Finite Element (FE) framework a unit cell (UC) at microscale. By assigning material-specific properties to these unit cells, we can model various serration profiles and distributions and calculate their effect on the mixed-mode stress intensity factor (SIF), including its magnitude and phase angle. The simulation demonstrates that serration profoundly changes the local behavior of an interfacial crack. The serrations decrease the SIF in mode I, increase it in mode II, and, when the serration's height-towidth ratio increases, the mode mixity SIF increases as well. We find that sparse serration confines variation in the SIFs to the local peaks and that dense serrations cause widespread undulations in the SIF's magnitude and phase angle.

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Interfacial fracture toughness between bovine cortical bone and cements

Cited by 34 publications

References 33 publications

Peri‐implant bone formation and implant integration strength of peptide‐modified p(AAM‐co‐EG/AAC) interpenetrating polymer network‐coated titanium implants

Peri‐implant bone formation and implant integration strength of peptide‐modified p(AAM‐co‐EG/AAC) interpenetrating polymer network‐coated titanium implants

Contributions to the interfacial adhesion in co-sintered bilayers

Serration effects on interfacial cracks

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