Cobalt-chromium head wear following revision hip arthroplasty performed after ceramic fracture--a case report. Masahiro Hasegawa Department of Orthopedic Surgery, Mie University Faculty of Medicine, Tsu City, Mie 514-8507, Japan.
The relationship between cobalt/chromium ratios and the high prevalence of head-stem junction corrosion in metal-on-metal total hip arthroplasty. J. Arthroplasty 31, 1123–1127 (2016).
It was reported that patient underwent total hip arthroplasty on an unknown date. Subsequently, the patient was revised on (b)(6), 2011 due to metallosis and elevated cobalt and chromium levels following two years of ongoing grinding and subluxation. The acetabular cup, taper liner and modular head were removed and replaced.
described above). Cobalt-chromium heads can be paired with plastic or metal liners. Due to some potential concerns for metal debris formation when cobalt -chromium heads are paired with metal liners recently brought to light, cobalt-chromium heads are now most commonly used with plastic liners instead of metal liners.
CASE REPORT Delamination of a highly cross-linked polyethylene liner associated with titanium deposits on the cobalt-chromium modular femoral head following dislocation E. W. Patten, Retrieval studies of total hip replacements with highly cross-linked ultra-high-molecular- S. A. Atwood, weight polyethylene liners have shown much less surface damage than with conventional D. W. Van Citters ...
This is because elements such as cobalt, chromium, and nickel included in cobalt–chromium alloys have controversial effects on immune responses and cytotoxicity (Spriano et al., 2005). The cobalt–chromium alloys used in the second generation of total hip replacements proved to be successful after short-to medium-term follow-up clinical studies.
Particles from MoM implants, namely chromium and cobalt ions, can damage surrounding tissues and bone and enter the blood stream. This can lead to complications known as Adverse Local Tissue Reaction (ATLR) and metallosis (metal toxicity). The tissue damage associated with ATLR can cause necrosis – the death of most or all of the cells in the ...
No hip had distal femoral or acetabular osteolysis. All hips in the cobalt-chromium head group and all but two hips in the zirconia head group had radiographic evidence of bone growth into the porous surfaces of the femoral stem (zones 1, 7, 8, and 14 as defined by Gruen et al. 13 ).
Positive independent predictors for the cobalt–chromium ratio in the multivariate analysis were overall follow-up time (p = 0.004), bilateral MoM–THA (p < 0.001) and femoral head size (p = 0.007).
Cobalt-Chromium Alloy Provides excellent fatigue strength, allowing for a reduced neck geometry below the taper to provide greater range of motion. 12/14 Neck Taper Accommodates a complete selection of femoral heads with head center options. Highly Polished Surface Designed to work in conjunction with the taper geometry to enhance stem stability.
i.e. cobalt-chromium (CoCr) alloy femoral head on a titanium alloy stem. Fretting corrosion . corrosion from relative micromotion between two materials causing wear. i.e. tolerance between male and morse taper allows for micromotion and wear. contributes to trunniononsis.
A revision total hip replacement was performed in March 2011, principally because of her systemic symptoms and elevated cobalt and chromium levels. The ASR metal cup and head were removed and the stem retained. Her acetabulum was revised with an all-polyethylene cemented cup and the head was changed to a ceramic one.
Introduction Increased cobalt (Co) and chromium (Cr) serum levels are one reason for revision surgery in metal on metal (MoM) total hip arthroplasty (THA) patients. Dual mobility liners are a simple revision option; however, they preserve the metal shell and stem and it is therefore not clear if metal ion levels will fully normalize after revision surgery. Material and methods Between April ...
A Cobalt-Chromium (Co-Cr) femoral head is a good bearing material because it possesses low wear properties, while titanium alloy scratches easily leading to rapid polyethylene abrasive wear (titanium is a great material for the acetabular shell or …
2. Pazzaglia U, Apostoli P, Congiu T, Catalani S, Marchese M, Zarattini G. Cobalt, chromium and molybdenum ions kinetics in the human body: data gained from a total hip replacement with massive third body wear of the head and neuropathy by cobalt intoxication. Arch Orthop Trauma Surg. 2011;131:1299–1308.
Methods: We performed a retrospective study of a prospective longitudinal cohort of 82 consecutive patients (89 hips) who underwent primary THA with an HXLPE acetabular liner and a cobalt-chromium femoral head. The mean age at the time of surgery for the cohort was 38.8 years (range 12-50).
Cobalt/chromium head and socket use Synthetic Substitute, Metal in 0SRuse Synthetic Substitute, Metal in 0SR
ns and normal levels of serum chromium ions. Gross trunnion failure, apparently caused by corrosion, required femoral stem revision in all of the patients. Conclusion: Decreased neck diameter, longer trunnion length, and large-sized cobalt-chromium heads are possible contributors to early failure after primary total hip arthroplasty due to trunnionosis. Surgeons should be mindful of ...
with a new stainless-steel femoral head, and the cemented all-polyethylene cup remained in situ. Metal heads made of cobalt-chromium alloy are believed to be more resistant to abrasive wear than heads made of stainless steel (Kempf and Sem-Figure 2. The removed cobalt-chromium head showing loss of the superior part of the head because of severe ...
If you're allergic to nickel, cobalt or chromates, Dr. Anthony suggests swapping costume jewelry for jewelry made from higher-quality metals. Metals less likely to cause a reaction include ...
cobalt-chromium head in vivo at minimum 4-year follow-up compared with a 26 mm head retrospectively. Materials and Methods:Between December 2001 and July 2003, 44 primary cementless THAs were performed in 41 patients used with the Trilogy cup system (Zimmer) and the Versys stem system (Zimmer). As the bearing surface, a 32 mm
In its August 29, 2016 letter to orthopedic surgeons, Stryker explained that the LFIT V40 Head was recalled because of a high incidence of "taper lock failure". Stryker identified various potential hazards associated with LFIT V40 taper lock failure, including metallosis (elevated cobalt or chromium in the blood) which can result in an ...
G Model IJSCR 1305 1–5 CASE REPORT – OPEN ACCESS International Journal of Surgery Case Reports xxx (2015) xxx–xxx Contents lists available at ScienceDirect International Journal of Surgery Case Reports journal homepage: 1 Normalization of chromium and cobalt values after femoral 2 head replacement 3 Q1 Claudio Iacobellis a,∗, Antonio Berizzi a, Assunta Pozzuoli b ...
femoral head and/or acetabulum. Although their use is decreasing due to safety concerns, cobalt-chromium femoral heads were still used in 51% of total hip arthro-plasties in 2014. 3. There is rising concern about the adverse effects of metal ions released from these joint replacements. However, little published evidence is
The metal on metal design of DePuy's ASR hip replacement system can cause metal toxicity due to chromium and cobalt ions floating around in the blood. Some patients are at a higher risk than others and doctors say that it's important for anyone with a DePuy hip replacement to check chromium and cobalt ion levels in the blood.
The study aims to identify the concentration-dependent role of bovine serum albumin (BSA) and γ-globulin in the lubricating ability of a cobalt-chromium femoral head. The frictional coefficients of the cobalt-chromium femoral head decreased with increasing BSA concentrations from 10 to 40 mg/ml and showed statistical differences between any of the BSA concentration groups, …
Approximately 1 million metal-on-metal (MoM) 6 hip prostheses have been implanted worldwide to alleviate pain, restore hip function, and improve overall quality of life. These implants contain femoral and acetabular bearing surfaces that are typically composed predominantly of …
1. Biointerphases. 2014 Sep;9(3):031007. doi: 10.1116/1.4886255. Role of hyaluronic acid and phospholipid in the lubrication of a cobalt-chromium head for total hip arthroplasty.
Every component was removed and the cobalt-chromium femoral head was severely worn, with a hole in it (Figure 4). Laboratory exam of the head revealed an 18 g of metal loss, explaining heavy metal intoxication. Ceramic particles around polyethylene and chromium-cobalt head were also found, contributing to metal debris formation.
Cobalt Chromium Heads ... Revision rate trends from within the MicroPort Orthopedics Inc. database evaluated for the modular head Metal on Metal THA systems show an increasing overall trend from 2009 to present and it was found that there was a specific hazard/harm for suspected tissue reaction to metal debris over one percent for modular head ...
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