Transfer of metallic debris from the metal surface of an acetabular cup to artificial femoral heads by scraping: Comparison between alumina and cobalt–chrome heads

2008 ◽  
Vol 85B (1) ◽  
pp. 204-209 ◽  
Author(s):  
Chong Bum Chang ◽  
Jeong Joon Yoo ◽  
Won Seok Song ◽  
Deug Joong Kim ◽  
Kyung-Hoi Koo ◽  
...  
Keyword(s):  
Metal Surface ◽  
Acetabular Cup ◽  
Femoral Heads ◽  
Cobalt Chrome

An Experimental Study of Metallic Transfer on Ceramic Femoral Heads

2009 ◽  
Author(s):  
Douglas M. Doud ◽  
Preston R. Beck ◽  
Donald R. Petersen ◽  
Jack E. Lemons ◽  
Alan W. Eberhardt
Keyword(s):  
Experimental Study ◽  
Femoral Head ◽  
Life Expectancy ◽  
Metal Transfer ◽  
Acetabular Cup ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Femoral Heads ◽  
Hip Replacements ◽  
Postoperative Dislocation

Postoperative dislocation of total hip replacements has been documented to occur at a rate of approximately 2.4–3.9% [1–3]. Such events may result in the transfer of titanium from the acetabular cup to the femoral head, both during the dislocation and surgical reduction of the dislocated joint [3,4]. If the head is reduced with this transfer present, the joint life expectancy, which depends on articulating surfaces remaining smooth, is reduced [4]. Although the presence of metal transfer on retrieved femoral heads after dislocation is documented, no previous studies have attempted to quantify the forces or contact stresses at which metal transfer occurs.

Wear Performance of 28 Millimeter Femoral Heads with the Harris Galante Cup: Comparison of Alumina and Cobalt Chrome

2003 ◽  
pp. 177-182
Author(s):  
Ch. Hendrich ◽  
S. Goebel ◽  
Ch. Roller ◽  
S. Kirschner ◽  
J. M. Martell
Keyword(s):  
Wear Performance ◽  
Femoral Heads ◽  
Cobalt Chrome

Five-year comparison of wear using oxidised zirconium and cobalt–chrome femoral heads in total hip arthroplasty

2015 ◽  
Vol 97-B (7) ◽  
pp. 883-889 ◽  
Author(s):  
S. S. Jassim ◽  
S. Patel ◽  
N. Wardle ◽  
J. Tahmassebi ◽  
R. Middleton ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Total Hip ◽  
Femoral Heads ◽  
Cobalt Chrome

scholarly journals Wear and migration of highly cross-linked and conventional cemented polyethylene cups with cobalt chrome or Oxinium femoral heads: A randomized radiostereometric study of 150 patients

2011 ◽  
Vol 29 (8) ◽  
pp. 1222-1229 ◽  
Author(s):  
Thomas Kadar ◽  
Geir Hallan ◽  
Arild Aamodt ◽  
Kari Indrekvam ◽  
Mona Badawy ◽  
...  
Keyword(s):  
Femoral Heads ◽  
And Migration ◽  
Cobalt Chrome

scholarly journals Results of primary THA using 36 mm femoral heads on first-generation highly cross-linked polyethylene in patients less than 60 years of age: Minimum 10-year follow-ups

2020 ◽  
Vol 28 (1) ◽  
pp. 230949901989644
Author(s):  
Myung-Rae Cho ◽  
Chung-Mu Jun ◽  
Kyung-Tae Kim ◽  
Suk Kyun Song ◽  
Won-Kee Choi
Keyword(s):  
Wear Rate ◽  
First Generation ◽  
Femoral Stem ◽  
Long Term Results ◽  
Harris Hip Score ◽  
Acetabular Cup ◽  
Wear Rates ◽  
Femoral Heads ◽  
The Mean

Purpose: Long-term results of total hip arthroplasty (THA) using highly cross-linked polyethylene (HXLPE) and metal femoral head with more than 10 years of follow-up have already been reported. However, most studies included results with a head size of 28 mm that could affect wear rates. The aim of this study was to evaluate the results of 36-mm metallic femoral heads on first-generation HXLPE in patients less than 60 years of age with a minimum follow-up of 10 years. Methods: Retrospective analysis included 54 cases from 47 patients. The mean age at the time of surgery was 47.22 years and the mean follow-up period was 131.04 months. Porous-coated cementless acetabular cups (Trilolgy®; Zimmer Inc., Warsaw, Indiana, USA) and HXLPE acetabular liners (Longevity®; Zimmer Inc.) were used for all cases. Acetabular cup abduction angles, anteversion angles, and wear rates of liner were measured using polyWare pro 3D distal version 5.10. Results: The average modified Harris hip score at the final follow-up was 88.48 (range 80–96). Average Merle d’Aubigne and Postel score was 15.57 (range 14–18). There was no acetabular cup or femoral stem failing due to aseptic loosening. The average steady-state wear rate determined using radiographs taken at 1 year postoperatively and at the latest follow-up was 0.053 ± 0.025 mm/year. There were no statistically significant differences in liner wear rate with respect to age, variety of the femoral stem, or liner thickness. Conclusion: Results of THA with 36-mm metallic femoral heads on first-generation HXLPE in patients less than 60 years of age were satisfactory.

scholarly journals Acetabular Component Deformation under Rim Loading Using Digital Image Correlation and Finite Element Methods

2010 ◽  
Vol 24-25 ◽  
pp. 275-280 ◽  
Author(s):  
H. Everitt ◽  
S.L. Evans ◽  
C.A. Holt ◽  
Rob Bigsby ◽  
Imran Khan
Keyword(s):  
Finite Element ◽  
Digital Image Correlation ◽  
Wall Thickness ◽  
Digital Image ◽  
Image Correlation ◽  
Acetabular Cup ◽  
Simple Method ◽  
Press Fit ◽  
Outside Diameter ◽  
Cobalt Chrome

Total hip replacement is a highly successful operation; restoring function and reducing pain in arthritis patients. In recent years, thinner resurfacing acetabular cups have been introduced in order to preserve bone stock and reduce the risk of dislocation. However concerns have been raised that deformation of these cups could adversely affect the lubrication regime of the bearing; leading to equatorial and edge contact, possibly causing the implants to jam. This study aims to assess the amount of deformation which occurs due to the tight peripheral fit experienced during press-fit by applying rim loading to three different designs of acetabular cup: a clinically successful cobalt chrome resurfacing cup, a prototype composite resurfacing cup and a clinically successful polyethylene monobloc cup. Digital Image Correlation (DIC) was used to measure the deformation and to validate Finite Element (FE) models. DIC provided a non-contacting method to measure displacement; meaning the load could be increased continuously rather than in steps as in previous studies. The physical testing showed that the cobalt chrome cups were significantly stiffer than the composite prototype and polyethylene cups. The FE models were in good agreement with the experimental results for all three cups and were able to predict the deformation to within 10%. FE models were also created to investigate the effect of cup outside diameter and wall thickness on stiffness under rim loading. Increasing outside diameter resulted in a linear reduction in stiffness for all three materials. Increasing the wall thickness resulted in an exponential increase in cup stiffness. Rim loading an acetabular shell does not accurately simulate the in vivo conditions; however it does provide a simple method for comparing cups made of different materials.

scholarly journals Bearing-Foreign Material Deposition on Retrieved Co-Cr Femoral Heads: Composition and Morphology

2015 ◽  
Vol 2015 ◽  
pp. 1-9
Author(s):  
Nishant M. Tikekar ◽  
Anneliese D. Heiner ◽  
Thomas E. Baer ◽  
Karen M. Kruger ◽  
John J. Callaghan ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Optical Profilometry ◽  
Foreign Material ◽  
X Ray ◽  
Material Deposition ◽  
Dislocation Reduction ◽  
Femoral Heads ◽  
Acetabular Shell ◽  
Hip Arthroplasties ◽  
Cobalt Chrome

Bearing-foreign material deposition onto a femoral head can occur from contact with an acetabular shell due to dislocation, reduction, or subluxation. The purpose of this study was to comprehensively characterize deposit regions on retrieved cobalt-chrome femoral heads from metal-on-polyethylene total hip arthroplasties that had experienced such adverse events. The morphology, topography, and composition of deposition regions were characterized using macrophotography, optical profilometry, scanning electron microscopy, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy. The deposit areas were relatively large, they were much rougher than the surrounding undamaged clean areas, and they displayed several distinct morphologies. Titanium alloy elements were the predominant constituents. Calcium and phosphorous were also detected within the deposit areas, in a composition that could nucleate abrasive hydroxyapatite. In addition, tungsten-rich particles, likely present as tungsten carbide, were observed on top of the titanium deposits. The increased roughness associated with these deposition features would be expected to accelerate damage and wear of the opposing liner and hence accelerate the development of osteolysis.

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