Influence of femoral stem surface finish on the apparent static shear strength at the stem–cement interface

Zhang, Hongyu; Brown, Linfield C.; Blunt, Liam; Barrans, Simon

doi:10.1016/j.jmbbm.2007.06.001

Cited by 34 publications

(25 citation statements)

References 26 publications

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“…19 It is generally accepted that long-term durability of cemented THA requires meticulous attention to three elements and their two corresponding interfaces, which are in this order: femoral stem, stem-cement interface, cement, bone-cement interface, and bone. 59 Several researchers have shown that the long-term stability of cemented THA depends critically on the lasting integrity of the bond between bone and cement. 54 Clinical evidence supports the same idea that failure along the bonecement interface inducing loosening of the implant is prevalent.…”

Section: Introductionmentioning

confidence: 99%

Does Increased Bone–Cement Interface Strength have Negative Consequences for Bulk Cement Integrity? A Finite Element Study

2008

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Implant loosening is one of the most important modes of failure of cemented total hip replacement. It may be related to the cement strength, cement-prosthesis interface, cement-bone interface, surgical technique, or stem design. The main purpose of this study is to investigate the effect of bone-cement interface mechanical properties on cement degradation. The computational methodology proposed herein combines a previously developed bone-cement interface damage model and an accumulative damage model for bulk cement. This has been applied to a finite element model of an Exeter cemented hip implant. A higher strength of the bone-cement interface due to a higher amount of interdigitated bone results in faster cement deterioration. Over time, damage both at the bone-cement interface and in the cement mantle worsens. Also, a larger debonded area was predicted proximally, as observed in clinical practice. We conclude that the computational model proposed herein allows a realistic simulation of the bone-cement interface debonding and cement degradation, being a useful tool in the design of this kind of medical devices.

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Section: Introductionmentioning

confidence: 99%

Does Increased Bone–Cement Interface Strength have Negative Consequences for Bulk Cement Integrity? A Finite Element Study

2008

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“…The increased interfacial strength at the interface, as demonstrated by Zhang [34], will modify the slip mechanisms acting between the surfaces. The role of slip mechanisms in degradation of fretting contact is well documented in the tribology and tribocorrosion literature.…”

Section: Effects Of the Increased Surface Roughness On The Evolving Tmentioning

confidence: 99%

“…Debonding at the stem-cement interface has been a topic of discussion for many years. Zhang et al [34] investigated the role surface roughness plays in the debonding of metallic and PMMA bone cements. Polished surfaces were seen to debond at 2.3kN, the same maximum load used in this study, whilst surfaces subjected to the same blasting process, a load of 4.0kN was required to initiate debonding.…”

Section: Effects Of the Increased Surface Roughness On The Evolving Tmentioning

confidence: 99%

The role of surface pre-treatment on the microstructure, corrosion and fretting corrosion of cemented femoral stems

Bryant

Farrar²,

Freeman³

et al. 2016

Biotribology

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The use of cemented femoral stems is common practice worldwide with strong clinical data supporting their use.Over the years, different surface processing techniques have been employed to enhance the performance of the stem-cement interface. As a result different clinical outcomes and visual presentation at revision has been observed. Whilst research has focussed on increasing adhesion and better load bearing capacity, the effects of surface processing on the degradation of cemented femoral stems has not been investigated. The aims of this study was to investigate the effects of surface processing on the subsurface microstructure, surface chemistry and tribocorrosion degradation mechanisms of cemented tapered femoral stems subjected to polishing and blasting (Vaquasheen) processes. Cemented femoral stems were orientated and loaded according to for 500,000 cycles in 0.9% NaCl at 37 ˚C. A three-electrode electrochemical cell was integrated into the mechanical test to facilitate in-situ corrosion measurements. The severity and mechanism of damaged were assessed scanning and transmission electron microscopy, X-ray photoelectron spectrometry, solution mass spectrometry and white light interferometry. Surface processing was seen to drastically influence the level of corrosion within the interface with polished surfaces demonstrating the highest levels of corrosion. Surface analysis consistently demonstrated the presence of a SiO2 layer on the vaquasheened stems thought to originate from the glass bead blast matrix. This resulted in lower levels of corrosion both under static and tribocorrosion assessment. In conclusion, blasted surfaces resulted in lower wear induced corrosion when compared to the polished surfaces. However the total metallic ion levels did not follow the same trend. This is thought to be due to the formation of metallic debris and dissolution of debris due to abrasion of the femoral stems. Over the years, different surface processing techniques have been employed to enhance the performance of the stem-cement interface. As a result different clinical outcomes and visual presentation at revision has been observed. Whilst research has focussed on increasing adhesion and better load bearing capacity, the effects of surface processing on the degradation of cemented femoral stems has not been investigated. The aims of this study was to investigate the effects of surface processing on the subsurface microstructure, surface chemistry and tribocorrosion degradation mechanisms of cemented tapered femoral stems subjected to polishing and blasting (Vaquasheen) processes. Cemented femoral stems were orientated and loaded according to for 500,000 cycles in 0.9% NaCl at 37 ˚C. A three-electrode electrochemical cell was integrated into the mechanical test to facilitate in-situ corrosion measurements. The severity and mechanism of damaged were assessed scanning and transmission electron microscopy, X-ray photoelectron spectrometry, solution mass spectrometry and white light interferometry. Surface processin...

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“…50 It is widely considered that the long-term stability of cemented hip implants critically depends on three elements (bone, cement, and femoral stem) and their two corresponding interfaces (the stem-cement and bone-cement interfaces). 4,58 Several researches have investigated cement failure, and small cement fractures are thought to play a significant role in the initiation of failure. 14,18,57 Fatigue failure of the cement mantle has been also identified as a possible loosening mechanism of the femoral prosthesis.…”

Section: Introductionmentioning

confidence: 99%

Comparative Finite Element Analysis of the Debonding Process in Different Concepts of Cemented Hip Implants

Pérez

Palacios

2010

Ann Biomed Eng

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Damage accumulation in the cement mantle and debonding of the bone-cement interface are basic events that contribute to the long-term failure of cemented hip reconstructions. In this work, a numerical study with these two process coupled is presented. Previously uniform bone-cement interface mechanical properties were only considered. In this work, a new approach assuming nonuniform and random bone-cement interface mechanical properties was applied to investigate its effect on cement degradation. This methodology was also applied to simulate and compare the degradation process of the cement and bone-cement interface in three different concepts of design: Exeter, Charnley, and ABG II stems. Nonuniform and random mechanical properties of the bone-cement interface implied a simulation closer to reality. The predicted results showed that the cement deterioration and bone-cement interface debonding is different for each implant depending on the stem geometry. Lower cement deterioration was obtained for the Charnley stem and lower bone-cement interface debonding was predicted for the Exeter stem, while the highest deterioration (cement and bone-cement interface) was produced for the ABG II stem.

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Influence of femoral stem surface finish on the apparent static shear strength at the stem–cement interface

Cited by 34 publications

References 26 publications

Does Increased Bone–Cement Interface Strength have Negative Consequences for Bulk Cement Integrity? A Finite Element Study

Does Increased Bone–Cement Interface Strength have Negative Consequences for Bulk Cement Integrity? A Finite Element Study

The role of surface pre-treatment on the microstructure, corrosion and fretting corrosion of cemented femoral stems

Comparative Finite Element Analysis of the Debonding Process in Different Concepts of Cemented Hip Implants

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