Factors Related to Imprinting Corrosion in Modular Head-Neck Junctions

Citters, Douglas W. Van; Martin, Audrey; Currier, John H.; Park, Sang‐Hyun; Edidin, Avram A.

doi:10.1520/stp159120140138

Cited by 11 publications

(21 citation statements)

References 15 publications

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“…This global damage feature was often visible with the naked eye and was commonly referred to as imprinting. 12 Imprinting occurred in both Co/Co or Co/Ti material couples (Figure 10). Imprinting was present in 77% of head tapers of Co/Co couples and in 88% of head tapers of Co/Ti couples.…”

Section: Resultsmentioning

confidence: 99%

“…Some studies also suggest that imprinting can be the result of mechanical and electrochemical processes, but agreement on the exact process has yet to be reached. 11,12,23 Also, it is important to consider that in many cases several damage modes occur simultaneously or consecutively and therefore the resulting damage features can overlap. In some cases, one damage mode may enable others over time.…”

Section: Discussionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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

et al. 2017

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“…Features smaller than 3 mm in diameter cannot be fully probed using this protocol due to the size of the ruby probe tip. Errors of this nature have been shown to have negligible impact in other material loss studies . Additionally, in cases of extreme component deformation (e.g., severe plastic deformation during removal from the patient), the current scanning technique may not reach the full extent of the component edges, resulting in an underestimation of the total volumetric wear.…”

Section: Discussionmentioning

confidence: 99%

“…Errors of this nature have been shown to have negligible impact in other material loss studies. 21 Additionally, in cases of extreme component deformation (e.g., severe plastic deformation during removal from the patient), the current scanning technique may not reach the full extent of the component edges, resulting in an underestimation of the total volumetric wear. Finally, the algorithm relies heavily on the correct identification of the geometric boundaries which are determined either via user input or by a set of carefully selected requirements to identify the region boundaries.…”

Section: /Yearmentioning

confidence: 99%

Analysis of polyethylene wear of reverse shoulder components: A validated technique and initial clinical results

2017

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One of the most prevalent phenomena associated with reverse total shoulder arthroplasty (rTSA) is scapular notching. Current methods examine only the damage to the scapula and no methods are available for quantifying the total wear volume of the polyethylene humeral bearing. Quantifying the polyethylene material loss may provide insight into the mechanism for scapular notching and into the particle dose delivered to the patient. A coordinate measurement machine (CMM) and custom computer algorithms were employed to quantify the volumetric wear of polyethylene humeral bearings. This technique was validated using two never-implanted polyethylene humeral liners with a controlled amount of wear in clinically relevant locations. The technique was determined to be accurate to within 10% of the known value and within 5 mm of the gravimetrically determined values. Following validation, ten retrieved polyethylene humeral liners were analyzed to determine a baseline for future clinical tests. Four of the ten polyethylene humeral liners showed visible and measureable wear volumes ranging from 40 to 90 mm total with a maximum wear rate as high as 470 mm /year in one short duration and significantly damaged humeral liner. This validated technique has the potential to relate patient outcomes such as scapular notching grades to polyethylene release into the body. While the total wear volumes are less than reported in literature for cases of osteolysis in knee and hip patients, dosages are well within the osteolytic thresholds that have been suggested, indicating that osteolysis may be a clinical concern in the shoulder. This work provides the basis for future studies that relate volumetric wear to patient outcomes. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:980-987, 2017.

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“…Recently, other damage pathways such as proximal-distal running etched troughs on head taper surfaces (column damage; Fig. 1D) [10,20,25], imprinting of the stem topography into the head taper surface [5,48], and cell-induced corrosion processes [16,20] have also been described.…”

Section: Introductionmentioning

confidence: 99%