Fracture toughness of CoCr alloy-PMMA cement interface

Mann, Kenneth A.; Edidin, Avram A.; Ordway, Nathaniel R.; Manley, Michael

doi:10.1002/(sici)1097-4636(199723)38:3<211::aid-jbm5>3.0.co;2-s

Cited by 18 publications

(3 citation statements)

References 23 publications

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“…Such osseo-integrated cells can eliminate contact between the bone and the environment and restricting contamination at the cemented prosthetic joint. Another way to reduce loosening would be to increase mechanical interlock between bone and cement [8, 9] . This can be done by enhancing the surface roughness of the PMMA cement.…”

Section: Introductionmentioning

confidence: 99%

Material Mismatch Effect on the Fracture of a Bone-Composite Cement Interface

Khandaker¹,

Tarantini²

2012

AMSA

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The interfacial mechanics at the bone-implant interface is a critical issue for implant fixation and the filling of bone defects created by tumors and/or their excision. Our previous study found that micron and nano sizes MgO particles improved the fracture toughness of bone-cement interfaces under tension loading. The strength of bonding of different types of bone with different types of implants may not be the same. The aims of this research were to determine the influences of material mismatch due to bone orientation and a magnesium oxide (MgO) filler material for PMMA bone cement on the mechanical strength between bone and bone cement specimens. This research studied the longitudinal and transverse directions bovine cortical bone as different bone materials and poly Methyl MethAcrylate (PMMA) bone cement with and without MgO additives as different implant materials. The scope of work for this study was: (1) to determine the bending strength and modulus of different bone and bone cement specimens, (2) to determine whether inclusion of MgO particles on PMMA has any influence on these mechanical properties of PMMA, and (3) to determine whether bone orientation and inclusion of MgO particles with PMMA has any influence on the interface strength between bone and PMMA. This study showed that bone orientation has statistically significant effect on the bonding strength between bone and bone cement specimens (P value<0.05). This study also found that while MgO additive decreased the bending strength and modulus of PMMA bone cement, but the inclusion of MgO additives with PMMA bone cement has no statistically significant effect on the bonding strength between bone and bone cement specimens (P value>0.05).

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Section: Introductionmentioning

confidence: 99%

Material Mismatch Effect on the Fracture of a Bone-Composite Cement Interface

Khandaker¹,

Tarantini²

2012

AMSA

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“…A sequence of events that includes debonding along the prosthetic/polymethylmethacrylate interface, fracture through the cement mantle, fretting of the polymethylmethacrylate, and bone osteolysis has been postulated as a likely failure mechanism in cemented systcms (19). A significant number of studies have therefore been undertaken to characterize the performance and reliability of these interface systcms (1,3,8,20,26,30). Increasing the roughness of the prosthetic surfaces to enhance the mechanical bonding at the interface has been proposed as a solution.…”

Section: Discussionmentioning

confidence: 99%

Adhesion and reliability of interfaces in cemented total joint arthroplasties

Ohashi

Romero

McGowan

et al. 1998

Journal Orthopaedic Research

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Debonding of the prosthetic/polymethylmethacrylate interface has been implicated in the initial failure process of cemented total hip arthroplasties. However, little quantitative understanding of the debonding process, as well as of the optimum interface morphology for enhanced resistance to debonding, exists. Accordingly, a fracture-mechanics approach has been used in which adhesion at the interface is characterized in terms of the interface fracture energy, G (J/m2), and shown to be a strong function of the morphology, debonding length, and loading mode of the interface. Double-cantilever-beam and four-point-flexure fracture-mechanics samples containing four clinically relevant prosthetic surface preparations were prepared to survey a range of interface roughness and loading modes. Adhesion at the interface could not be characterized with a single-valued material property but was found to exhibit resistance-curve behavior in which resistance to debonding increased with both the initial debond extension and the roughness of the interface. Values of debonding initiation, Go, were relatively insensitive to the roughness of the surface and the loading mode, whereas steady-state fracture resistance of the interface, Gss, increased significantly with the roughness and shear loading of the interface. These quantitative results suggest that debonding of the prosthetic/polymethylmethacrylate interface may be primarily attributed to surface interactions such as interlocking and the pullout of rough asperities that occur behind the debond tip. A simple mechanics analysis of such interactions was performed and revealed increases in the fracture resistance of the interface that were consistent with experimentally measured values.

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“…Extensive research had been done for bone remodeling to improve interaction with the implant. Development of wear resistant material and effort on maintaining better bone quality are also important [ 3 ]. The mechanical characteristic of the fiber induced implant can be obtained by sandwiching the micron or nanosize fiber in between the implant and cement.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fiber Patterns on the Fracture of Implant/Cement Interfaces

Khandaker

Khadaka

2014

Procedia Engineering

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Electrospinning is a process by which fibers with micron to nanometer diameters can be obtained from an electrostatically driven jet of polymer solution. These fibers have a high surface area to volume ratio, which have numerous applications in biomedical implants such as total hip implant, dental implant. The present study is based on the hypothesis that the differences of the surface properties at titanium/cement interface due to incorporation of micro and sub-micron diameters fiber directions may have influence on the quality of titanium/cement union. The objectives of this research were to design and construct electrospinning unit for the fabrication uni-and bi-directions polycaprolactone (PCL) fiber on titanium and to measure the effect of fiber directions on the interface fracture strengths of sandwiched titanium (Ti) and poly methyl methacrylate (PMMA) cement samples with (uni-and bi-directions) and without fibers. Two groups of single edge sandwiched Ti/PMMA specimens were prepared. First group of specimen consists of Ti/PMMA sandwiched specimen without PCL fiber. Second group of specimen consists of Ti/PMMA sandwiched specimen with uni-and bi-direction PCL fibers. PCL fibers were ejected from the syringe via charged needle and deposited on two different grounded collectors to coat uni-and bi-directions PCL fibers on Ti plates. PMMA cement was poured and cured on the Ti plates with and without PCL fibers in a custom made mold to prepare Ti/PMMA samples with uni-and bi-directions fibers. Shear tests were conducted on each group of Ti/PMMA samples using Evex tensile test stage. Interface fracture toughness was calculated to determine the effect of fiber patterns on Ti/PMMA samples. This study successfully produced an electrospun unit that can produce uni-and bi-direction PCL fibers. Diameters of produced fibers were found to be in the range of 919 nm ~1.25 μm. This study found that the values of KIC of Ti/PMMA with uni-direction fiber were significantly higher when compared to the values of KIC of the Ti/PMMA without fiber (p<0.05), although the values of KIC of Ti/PMMA with bi-direction fiber were significantly lower when compared to the values of KIC of the Ti/PMMA without fiber. Results indicated that the addition of the fiber to Ti improved the quality of Ti/PMMA union and fiber directions have significant effect on the strength of the Ti-PMMA union.

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Fracture toughness of CoCr alloy-PMMA cement interface

Cited by 18 publications

References 23 publications

Material Mismatch Effect on the Fracture of a Bone-Composite Cement Interface

Material Mismatch Effect on the Fracture of a Bone-Composite Cement Interface

Adhesion and reliability of interfaces in cemented total joint arthroplasties

Effect of Fiber Patterns on the Fracture of Implant/Cement Interfaces

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