Does Surface Topography Play a Role in Taper Damage in Head-neck Modular Junctions?

Pourzal, Robin; Hall, Deborah A.; Ha, Nguyen Q.; Urban, Robert M.; Levine, Brett R.; Jacobs, Joshua J.; Lundberg, Hannah J.

doi:10.1007/s11999-016-4933-x

Cited by 51 publications

(47 citation statements)

References 39 publications

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“…The observed prevalence of the four damage scores for each material couple is in agreement with our earlier study with a smaller retrieval group. 22 The main difference was a considerably greater occurrence of mildly damaged head and stem tapers for Co/Ti compared to Co/Co couples. The damage modes observed in the present study included all of those reported previously for historic devices with the exception of selective leaching.…”

Section: Discussionmentioning

confidence: 96%

Mechanical, chemical and biological damage modes within head‐neck tapers of CoCrMo and Ti6Al4V contemporary hip replacements

et al. 2017

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Total hip replacement (THR) failure due to mechanically assisted crevice corrosion within modular head-neck taper junctions remains a major concern. Several processes leading to the generation of detrimental corrosion products have been reported in first generation modular devices. Contemporary junctions differ in their geometries, surface finishes, and head alloy. This study specifically provides an overview for CoCrMo/CoCrMo and CoCrMo/Ti6Al4V head-neck contemporary junctions. A retrieval study of 364 retrieved THRs was conducted which included visual examination and determination of damage scores, as well as the examination of damage features using scanning electron microscopy. Different separately occurring or overlapping damage modes were identified that appeared to be either mechanically or chemically dominated. Mechanically dominated damage features included plastic deformation, fretting, and material transfer, whereas chemically dominate damage included pitting corrosion, etching, intergranular corrosion, phase boundary corrosion, and column damage. Etching associated cellular activity was also observed. Furthermore, fretting corrosion, formation of thick oxide films, and imprinting were observed which appeared to be the result of both mechanical and chemical processes. The occurrence and extent of damage caused by different modes was shown to depend on the material, the material couple, and alloy microstructure. In order to minimize THR failure due to material degradation within modular junctions, it is important to distinguish different damage modes, determine their cause, and identify appropriate counter measures, which may differ depending on the material, specific microstructural alloy features, and design factors such as surface topography. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1672-1685, 2018.

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Section: Discussionmentioning

confidence: 96%

Mechanical, chemical and biological damage modes within head‐neck tapers of CoCrMo and Ti6Al4V contemporary hip replacements

et al. 2017

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“…Therefore, it seems likely that specific microstructural characteristics can make a cast or wrought CoCrMo alloy only more or less prone to some corrosion modes. There still must be other contributing factors such as micromotion, taper angular mismatch, surface topography, assembly load, and synovial fluid composition that initially enable the process of MACC [25,31,41,43]. For example, fretting and imprinting processes may lead to widening of the crevices allowing joint fluid to enter and potentially change the chemical environment.…”

Section: Discussionmentioning

confidence: 99%

Alloy Microstructure Dictates Corrosion Modes in THA Modular Junctions

Pourzal

Hall

Ehrich

et al. 2017

Clinical Orthopaedics &Amp; Related Research

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“…They observed a change in the smooth surface of the head taper when it articulated against a “rough” neck taper. Pourzal et al 39 found a correlation between the stem surface topography and Goldberg damage scores 11 for retrieved implants. Moharrami et al 40 suggested that the increased hardness of titanium oxide might be responsible for abrasive wear of the harder more wear resistantCoCrMo.…”

Section: Discussionmentioning

confidence: 99%

Fretting corrosion of Si₃N₄ vs CoCrMo femoral heads on Ti‐6Al‐V trunnions

Khullar

Zhu

Gilbert

2020

Journal Orthopaedic Research

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Fretting corrosion at the head‐neck taper junction was compared between silicon nitride (Si3N4) and commercially available cobalt chrome (CoCrMo) femoral heads on titanium (Ti‐6Al‐4V) trunnions. An electrochemical setup was used to capture the fretting currents (characterized by oxide abrasion and repassivation) during cyclic loading. Onset load, pull‐off force (disassembly load), short term and long term (1 million cycles) fretting currents were used to compare the fretting corrosion performance between the test group (Si3N4/Ti‐6Al‐4V) and the control group (CoCrMo/Ti‐6Al‐4V). Incremental cyclic fretting corrosion tests showed that the Si3N4/Ti‐6Al‐4V combination had statistically lower (P < .05) average fretting current of 0.189 µA (SD = 0.114 µA) compared to 0.685 µA (SD = 0.630 µA) for CoCrMo/Ti‐6Al‐4V for cyclic load of 3200 N. Similarly, for the one million cycle fretting corrosion tests, the Si3N4/Ti‐6Al‐4V couples had statistically lower (P < .05) average current (0.048 µA, SD = 0.025 µA) vs CoCrMo/Ti‐6Al‐4V couples (0.366 µA, SD = 0.143 µA). The Si3N4 heads also had higher onset loads (P < .05) for fretting (vs CoCrMo, 2200 N vs 1740 N) indicating a difference in surface contact mechanics between the two groups. Scanning electron microscopy with energy dispersive spectroscopy confirmed material transfer from the trunnions to the heads for both groups tested, and from head to trunnion for the CoCrMo heads. Minimal Si3N4 transfer was noted. The electrochemical, mechanical, and microscopic inspection data supported the hypothesis that Si3N4/Ti‐6Al‐4Vcombination had better fretting corrosion performance compared to CoCrMo/Ti‐6Al‐4V.

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Does Surface Topography Play a Role in Taper Damage in Head-neck Modular Junctions?

Cited by 51 publications

References 39 publications

Mechanical, chemical and biological damage modes within head‐neck tapers of CoCrMo and Ti6Al4V contemporary hip replacements

Mechanical, chemical and biological damage modes within head‐neck tapers of CoCrMo and Ti6Al4V contemporary hip replacements

Alloy Microstructure Dictates Corrosion Modes in THA Modular Junctions

Fretting corrosion of Si₃N₄ vs CoCrMo femoral heads on Ti‐6Al‐V trunnions

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Does Surface Topography Play a Role in Taper Damage in Head-neck Modular Junctions?

Cited by 51 publications

References 39 publications

Mechanical, chemical and biological damage modes within head‐neck tapers of CoCrMo and Ti6Al4V contemporary hip replacements

Mechanical, chemical and biological damage modes within head‐neck tapers of CoCrMo and Ti6Al4V contemporary hip replacements

Alloy Microstructure Dictates Corrosion Modes in THA Modular Junctions

Fretting corrosion of Si3N4 vs CoCrMo femoral heads on Ti‐6Al‐V trunnions

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Fretting corrosion of Si₃N₄ vs CoCrMo femoral heads on Ti‐6Al‐V trunnions