Origins of material loss in highly worn acetabular cups of metal‐on‐metal total hip replacements

2018 ◽  
Vol 37 (1) ◽  
pp. 143-150 ◽  
Author(s):  
Zhen Lu ◽  
Edward Ebramzadeh
Keyword(s):  
Material Loss ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Metal On Metal ◽  
Hip Replacements

scholarly journals Material loss at the taper junction of retrieved large head metal‐on‐metal total hip replacements

2013 ◽  
Vol 31 (11) ◽  
pp. 1677-1685 ◽  
Author(s):  
Ashley K. Matthies ◽  
Radu Racasan ◽  
Paul Bills ◽  
Liam Blunt ◽  
Suzie Cro ◽  
...  
Keyword(s):  
Material Loss ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Large Head ◽  
Metal On Metal ◽  
Hip Replacements

scholarly journals The Performance of Mixed Manufacturer Metal On Metal Total Hip Replacements

2017 ◽  
Vol 7 (2) ◽  
Author(s):  
Richard Barker Cook ◽  
Jeremy M. Latham ◽  
Robert J.K. Wood
Keyword(s):  
Femoral Head ◽  
Hip Resurfacing ◽  
Normal Range ◽  
Material Loss ◽  
Total Hip ◽  
Loss Analysis ◽  
Total Hip Replacements ◽  
Metal On Metal ◽  
Hip Replacements ◽  
Stem Damage

Using a femoral head from one manufacturer on the stem of another manufacturer poses the risk that the taper interface between the components may not contact correctly and the performance of the joint will be impaired. The cohorts in this study are a combination of modular Birmingham Hip Resurfacing (BHR) and Adept femoral heads on CPT stems. The study reviews the geometry of the taper interfaces to establish if the taper clearance angles was outside of the normal range for other taper interfaces. In addition the rates of material loss from the bearings and taper and a ranking of the stem damage were reviewed to determine if the levels of loss were above that seen for other similar joints. The material loss analysis demonstrated that the rates or levels of loss from the bearings, taper and stem were no different to levels published for manufacturer matched joints and in many cases were lower. The results demonstrate that the taper clearance angles for the mixed manufacturer joints (BHR-CPT: 0.067 to -0.116, Adept-CPT: 0.101 to -0.056) were within the range of other studies and manufacturer matched clearances (0.134 to -0.149).Using components from different manufacturers has not in this instance increased the level of material loss from the joints, when compared to other similar manufacturer matched joints.

SURVIVORSHIP AND RETRIEVAL ANALYSIS OF SIKOMET METAL-ON-METAL TOTAL HIP REPLACEMENTS AT A MEAN OF SEVEN YEARS

2006 ◽  
Vol 88 (6) ◽  
pp. 1173-1182 ◽  
Author(s):  
INGRID MILOŠEV ◽  
RIHARD TREBŠE ◽  
SIMON KOVAČ ◽  
ANDREJ CÖR ◽  
VENČESLAV PIŠOT
Keyword(s):  
Total Hip ◽  
Retrieval Analysis ◽  
Total Hip Replacements ◽  
Metal On Metal ◽  
Hip Replacements

scholarly journals Granulation Tissue in Metal on Metal Total Hip Replacements: A Pathological Study.

1998 ◽  
Vol 47 (1) ◽  
pp. 151-154
Author(s):  
Koji Hiraoka ◽  
Fujio Higuchi ◽  
Rikimaru Kawabata ◽  
Akio Inoue
Keyword(s):  
Granulation Tissue ◽  
Pathological Study ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Metal On Metal ◽  
Hip Replacements

Quantification of self-polishing in vivo from explanted metal-on-metal total hip replacements

2011 ◽  
Vol 44 (5) ◽  
pp. 513-516 ◽  
Author(s):  
Thomas J. Joyce ◽  
Harry Grigg ◽  
David J. Langton ◽  
Antoni V.F. Nargol
Keyword(s):  
Total Hip ◽  
Total Hip Replacements ◽  
Metal On Metal ◽  
Hip Replacements

scholarly journals Does modularity of metal-on-metal hip implants increase cobalt: chromium ratio?

2019 ◽  
pp. 112070001987363
Author(s):  
Kevin C Ilo ◽  
Karim Aboelmagd ◽  
Harry S Hothi ◽  
Asaad Asaad ◽  
John A Skinner ◽  
...  
Keyword(s):  
Metal Ion ◽  
Hip Implants ◽  
Cobalt Chromium ◽  
Metal Debris ◽  
Material Loss ◽  
Total Hip ◽  
Modular Stem ◽  
Metal On Metal ◽  
Hip Replacements ◽  
Hip Arthroplasties

Background: Blood metal ion levels are used in the surveillance of metal-on-metal (MoM) hip implants. Modular implants contain an extra source of metal debris that may affect the ratio of metal ions in the blood. Methods: This was a retrospective study of 503 patients with hip replacements made by a single manufacturer (Smith & Nephew, Warwick, UK) with the same bearing surface. There were 54 total hip arthroplasties, 35 Birmingham Mid-Head Resections and 414 hip resurfacings. Whole blood metal ion levels and their ratios were analysed to investigate the effect of a modular junction. Results: The cobalt:chromium ratios were greater in the total hip arthroplasty group (mean 2.3:1) when compared to the resurfacings group (mean 1.3:1, p = <0.05) and Birmingham Mid-Head Resection group (mean 1.1:1, p = 0.11). Conclusions: This study demonstrated a trend for a higher cobalt:chromium ratio in patients with MoM total hip replacement that may be due to metal debris from the modular stem-head junction. Further work is required to correlate clinical data with retrieval analysis to confirm the effect of taper material loss on the cobalt:chromium ratio.

Outcome of Revision Arthroplasty for Failed Metal-On-Metal Total Hip Replacements; is there a Relation with Metal Ions?

2017 ◽  
Vol 27 (3) ◽  
pp. 235-240 ◽  
Author(s):  
Hafiz J. Iqbal ◽  
Waheeb A.K. Al-Azzani ◽  
Esther Jackson-Taylor ◽  
Elizabeth Clatworthy ◽  
Alun John
Keyword(s):  
Metal Ions ◽  
Revision Surgery ◽  
Revision Arthroplasty ◽  
Poor Correlation ◽  
Metal Debris ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Metal On Metal ◽  
Hip Replacements ◽  
Oxford Hip Score

Purpose We aimed to assess the early outcome following revision arthroplasty for failed metal-on-metal (MoM) total hip replacements (THR) due to adverse reaction to metal debris (ARMD). Methods We reviewed 106 consecutive revision arthroplasties. Case notes and radiological investigations were reviewed to assess the complications. Oxford Hip Score (OHS) and Euroqol (EQ-5D-3L) scores were used to assess the functional outcome and improvement of quality of life. Results At a mean follow-up of 20 months (12-48 months), the mean OHS was 28.7. Pain improved in 61% patients. A majority of patients were in level 2 for all the EQ-5D-3L dimensions. The overall complication rate was 16%. Survivorship free from further revision for any cause was 94.3% at 48 months. There was no correlation between pre-revision blood metal ions and the final outcome. Conclusions Revision surgery for failed MoM hip replacement due to ARMD is associated with a relatively higher rate of complications and risk of chronic pain. There is poor correlation between serum metal ions and development of ARMD and outcome following revision surgery.

Modern Metal on Metal Articulation for Total Hip Replacements

1996 ◽  
Vol 333 ◽  
pp. 108???117 ◽  
Author(s):  
Lawrence D. Dorr ◽  
Kevin R. Hilton ◽  
Zhinian Wan ◽  
George D. Markovich ◽  
Roy Bloebaum
Keyword(s):  
Total Hip ◽  
Total Hip Replacements ◽  
Metal On Metal ◽  
Hip Replacements

scholarly journals Four-year study of cobalt and chromium blood levels in patients managed with two different metal-on-metal total hip replacements

2003 ◽  
Vol 21 (2) ◽  
pp. 189-195 ◽  
Author(s):  
Christian Lhotka ◽  
Thomas Szekeres ◽  
Ilse Steffan ◽  
Klaus Zhuber ◽  
Karl Zweymüller
Keyword(s):  
Blood Levels ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Metal On Metal ◽  
Hip Replacements
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