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Metallosis

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https://www.readbyqxmd.com/read/28643347/off-resonance-based-assessment-of-metallic-wear-debris-near-total-hip-arthroplasty
#1
Kevin M Koch, Matthew F Koff, Thomas W Bauer, Parina H Shah, Andrew S Nencka, S Sivaram Kaushik, Hollis G Potter
PURPOSE: The presence of metallic debris near total hip arthroplasty can have a significant impact on longitudinal patient management. Methods for magnetic resonance imaging-based quantification of metallic debris near painful total hip replacements are described and applied to cohorts of symptomatic and control subject cases. METHODS: A combination of metal artifact reduction, off-resonance mapping, off-resonance background removal, and spatial clustering methods are utilized to quantify off-resonance signatures in cases of suspected metallosis...
June 22, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28624897/corrosion-of-harrington-rod-in-idiopathic-scoliosis-long-term-effects
#2
Beth Sherman, Tanya Crowell
PURPOSE: Metal implants have been used to treat adolescent idiopathic scoliosis since the 1960s. Only recently, however, it has the issue of metal-bone breakdown secondary to metal corrosion in situ come to light, raising concerns of possible long-term complications from the resulting metallosis and inflammation of spinal tissues. We present a case of a patient with neurological deficit, pain, and disability with Harrington rod in place for over 30 years, to bring attention to the issue of bio-corrosion of metal implants and its effect on human tissue...
June 17, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28619003/hydroxyapatite-as-a-nanomaterial-for-advanced-tissue-engineering-and-drug-therapy
#3
Juha Tuukkanen, Miho Nakamura
Hydroxyapatite (HAp) is a complicated ceramic material that varies between the way it appears in biological systems and how it is synthesized as various calcium phosphates. HAp varies in chemical composition of substituting atoms, crystallinity, grain size and electrical polarization. HAp can form solid to macro-, micro- and nanoporous structures. Also, particulate HAp can have highly porous structure. HAp can be used as coatings for metal implants in thicknesses from hundreds of microns down to hundreds of nanometers...
June 15, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28615939/effect-of-carbon-ion-implantation-on-the-tribology-of-metal-on-metal-bearings-for-artificial-joints
#4
Hironobu Koseki, Masato Tomita, Akihiko Yonekura, Takashi Higuchi, Sinya Sunagawa, Koumei Baba, Makoto Osaki
Metal-on-metal (MoM) bearings have become popular due to a major advantage over metal-on-polymer bearings for total hip arthroplasty in that the larger femoral head and hydrodynamic lubrication of the former reduce the rate of wear. However, concerns remain regarding adverse reactions to metal debris including metallosis caused by metal wear generated at the taper-head interface and another modular junction. Our group has hypothesized that carbon ion implantation (CII) may improve metal wear properties. The purpose of this study was to investigate the wear properties and friction coefficients of CII surfaces with an aim to ultimately apply these surfaces to MoM bearings in artificial joints...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28593060/fracture-of-the-tibial-baseplate-16-years-after-miller-galante-ii-total-knee-arthroplasty
#5
Kazuaki Mineta, Masahiko Okada, Soshi Matsumoto, Daisuke Hamada, Tomohiro Goto, Koichi Sairyo
We report a rare case of tibial baseplate fracture of Miller-Galante II (MG II) prosthesis. We examine the factors that may cause such late fracture and review the literature on radiographic analysis and retrieval studies. A 76-year-old woman, who had undergone bilateral MG II total knee arthroplasty due to rheumatoid arthritis 16 years earlier, presented to our department with a 3-month history of left knee pain. Plain radiographs revealed severe distortion of the medial tibial component. During revision knee arthroplasty, we observed severe metallosis in the knee joint, polyethylene insert deformation, and posteromedial coronal baseplate fracture...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28566388/magnetically-controlled-growing-rods-in-the-treatment-of-early-onset-scoliosis-a-note-of-caution
#6
P R P Rushton, I Siddique, R Crawford, N Birch, M J Gibson, M J Hutton
The MAGnetic Expansion Control (MAGEC) system is used increasingly in the management of early-onset scoliosis. Good results have been published, but there have been recent reports identifying implant failures that may be associated with significant metallosis surrounding the implants. This article aims to present the current knowledge regarding the performance of this implant, and the potential implications and strategies that may be employed to identify and limit any problems. We urge surgeons to apply caution to patient and construct selection; engage in prospective patient registration using a spine registry; ensure close clinical monitoring until growth has ceased; and send all explanted MAGEC rods for independent analysis...
June 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28489745/adverse-local-tissue-reaction-after-2-revision-hip-replacements-for-ceramic-liner-fracture-a-case-report
#7
Iulian Antoniac, Mihai Negrusoiu, Mihai Mardare, Claudiu Socoliuc, Ancuţa Zazgyva, Marius Niculescu
INTRODUCTION: In younger patients, ceramic-on-ceramic (CoC) bearing surfaces are usually recommended for total hip replacement (THR) because of their low wear rate and longer expected functional life. Although technical advancements have reduced the risk of ceramic bearings fracture, this complication remains a major concern. CASE DESCRIPTION: We present the case of a 56-year-old patient undergoing 3 revision hip arthroplasties of the right hip due to ceramic liner fractures...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28459777/analysis-of-explanted-magnetically-controlled-growing-rods-from-7-uk-spinal-centers
#8
Thomas J Joyce, Simon L Smith, Paul R P Rushton, Andrew J Bowey, Michael J Gibson
STUDY DESIGN: Analysis of explanted MAGnetic Expansion Control (MAGEC) growing rods. OBJECTIVE: To analyze explanted MAGEC rods used in management of early onset scoliosis and identify the mode of failure in such cases. SUMMARY OF BACKGROUND DATA: Magnetically controlled growing rods are increasingly used as the option of choice for early onset scoliosis. However, being more complex than conventional growing rods they are perhaps more likely to succumb to multifarious failure modes...
April 28, 2017: Spine
https://www.readbyqxmd.com/read/28367690/histological-analysis-of-early-osteolysis-in-total-ankle-arthroplasty
#9
Oliver N Schipper, Steven L Haddad, Peter Pytel, Ying Zhou
BACKGROUND: The purpose of this study was to perform a histological comparative analysis of tibiotalar joint samples taken from areas of osteolysis adjacent to total ankle arthroplasties vs control synovial specimens to determine the reaction to and presence of polyethylene (PE) particles. METHODS: A total of 57 pathology samples were identified in the osteolysis group, while 11 were identified in the control group. For each sample, hematoxylin and eosin, Oil Red O (ORO), and macrophage marker CD163-stained slides were created...
April 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28341314/fretting-and-corrosion-at-the-backside-of-modular-cobalt-chromium-acetabular-inserts-a-retrieval-analysis
#10
T David Tarity, Chelsea N Koch, Jayme C Burket, Timothy M Wright, Geoffrey H Westrich
BACKGROUND: Adverse local tissue reaction formation has been suggested to occur with the Modular Dual Mobility (MDM) acetabular design. Few reports in the literature have evaluated fretting and corrosion damage between the acetabular shell and modular metal inserts in this modular system. We evaluated a series of 18 retrieved cobalt chromium MDM inserts for evidence of fretting and corrosion. METHODS: We assessed the backsides of 18 MDM components for evidence of fretting and corrosion in polar and taper regions based on previously established methods...
March 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28276193/assessment-of-corrosion-in-retrieved-spine-implants
#11
V C Panagiotopoulou, H S Hothi, H A Anwar, S Molloy, H Noordeen, K Rezajooi, J Sutcliffe, J A Skinner, A J Hart
Recently the use of dissimilar metals in spine instrumentation has increased, especially in the case of adult deformities, where rods made from Cobalt Chrome alloys (CoCr) are used with Titanium (Ti) screws. The use of dissimilar metals increases the risk of galvanic corrosion and patients have required revision spine surgery due to severe metallosis that may have been caused by corrosion. We aimed to assess the presence of corrosion in spine implant retrievals from constructs with two types of material combinations: similar (Ti/Ti) and dissimilar (CoCr/Ti)...
March 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28216759/pseudotumor-due-to-metallosis-after-total-elbow-arthroplasty
#12
Roberto Rotini, Graziano Bettelli, Michele Cavaciocchi, Lucia Savarino
The incidence of primary total elbow arthroplasty (TEA) in young patients is increasing. The indications for revision surgery are also rising. Here, we report a rare case of pseudotumor detected in a patient 16 years after TEA. Intraoperative findings revealed a necrotic mass characterized by a conspicuous metallosis in the soft tissues around the prosthesis, which caused ulnar nerve dislocation. Due to this anatomical change, a lesion of the nerve was accidentally produced during revision surgery. The case report emphasizes that the indications for elbow replacement, as well as the patient education about the permanent physical limitations, should be carefully considered...
January 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28195859/metallosis-identified-via-intraoperative-cell-salvage-a-case-report
#13
Lauren M Parker, Mark H Yazer, Jonathan H Waters
Intraoperative cell salvage, whereby shed surgical blood is recovered for autologous reinfusion, is frequently used during hip arthroplasty because of the potential for significant blood loss. The following cases describe 2 instances in which chromium and cobalt particles from patients' metal-on-metal hip implants were identified within the blood recovery system. Results of heavy metal testing during the second case suggest that the use of a leukocyte reduction filter effectively reduces metal concentrations to below normal circulating levels...
February 15, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28114963/neuropsychiatric-symptoms-following-metal-on-metal-implant-failure-with-cobalt-and-chromium-toxicity
#14
Ben Green, Emily Griffiths, Solomon Almond
BACKGROUND: There were at least 31,171 metal-on-metal (MoM) hip implants in the UK between 2003 and 2011. Some of these were subject to failure and widescale recalls and revisions followed. METHOD: This is a presentation of ten cases (mean age 60 years) where we evaluated neuropsychiatric morbidity following metal-on-metal hip implant failure and revision. Implants were ASR total hip replacement (acetabular implant, taper sleeve adaptor and unipolar femoral implants) performed between 2005 and 2009...
January 24, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28097115/granulomatous-lung-disease-a-novel-complication-following-metallosis-from-hip-arthroplasty
#15
Theodoros Balbouzis, Thomas Georgiadis, Peter Grigoris
A case of a female patient with local and systemic complications of metallosis, following catastrophic wear of a revised hip arthroplasty, is presented. The patient had a history of a fractured ceramic-on-ceramic implant, exchanged with a metal-on-polyethylene prosthesis. Systemic complications included sarcoidosis-like reactions, presenting as granulomatous lung disease, along with chorioretinitis, erythema nodosum, and cardiomyopathy. High local and circulating cobalt and chromium levels established the diagnosis...
December 2016: Hip & Pelvis
https://www.readbyqxmd.com/read/27977422/metallosis-identified-via-intraoperative-cell-salvage
#16
Lauren M Parker, Mark H Yazer, Jonathan H Waters
Intraoperative cell salvage, whereby shed surgical blood is recovered for autologous reinfusion, is frequently used during hip arthroplasty because of the potential for significant blood loss. The following cases describe 2 instances in which chromium and cobalt particles from patients' metal-on-metal hip implants were identified within the blood recovery system. Results of heavy metal testing during the second case suggest that the use of a leukocyte reduction filter effectively reduces metal concentrations to below normal circulating levels...
December 12, 2016: A & A Case Reports
https://www.readbyqxmd.com/read/27909129/metallosis-following-implantation-of-magnetically-controlled-growing-rods-in-the-treatment-of-scoliosis-a-case-series
#17
K H Teoh, C von Ruhland, S L Evans, S H James, A Jones, J Howes, P R Davies, S Ahuja
AIMS: We present a case series of five patients who had revision surgery following magnetic controlled growing rods (MGCR) for early onset scoliosis. Metallosis was found during revision in four out of five patients and we postulated a mechanism for rod failure based on retrieval analysis. PATIENTS AND METHODS: Retrieval analysis was performed on the seven explanted rods. The mean duration of MCGR from implantation to revision was 35 months (17 to 46). The mean age at revision was 12 years (7 to 15; four boys, one girl)...
December 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27900702/metallosis-in-shoulder-arthroplasty-an-integrative-review-of-literature
#18
REVIEW
Paritosh Gogna, Paolo Paladini, Giovanni Merolla, Carlo Alberto Augusti, De Falco Maddalena, Giuseppe Porcellini
Shoulder arthroplasty has gained popularity as an efficient means of achieving pain relief and improved function in a variety of complex shoulder disorders. Despite promising reports, given the increasing number of shoulder arthroplasty procedures, various causes that may contribute to failure of a well-functioning arthroplasty are being increasingly recognized. One such disastrous condition is metallosis, a subject which has not been much talked off with reference to shoulder arthroplasty. This article besides reviewing the existing literature intends to discuss the possible causes that contribute to metallosis and devise a protocol for its timely diagnosis and management...
December 2016: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/27898357/catastrophic-metallosis-after-tumoral-knee-prosthesis-failure-a-case-report
#19
Luca La Verde, Domenico Fenga, Maria Silvia Spinelli, Francesco Rosario Campo, Michela Florio, Michele Attilio Rosa
INTRODUCTION: Metallosis is a condition characterized by an infiltration of periprosthetic soft tissues and bone by metallic debris resulting from wear or failure of joint arthroplasties. PRESENTATION OF CASE: Authors describe a case of a 45-year-old man treated for an osteosarcoma of the distal femur with a modular prosthesis when he was 18 years old, he developed massive metallosis with skin dyspigmentation after 17 years. His medical\surgical history was remarkable for a left tumoral knee prosthesis implanted 21 years ago...
November 18, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27811592/hip-metallosis-and-corrosion-a-million-harmed-due-to-fda-inaction
#20
Stephen Tower
No abstract text is available yet for this article.
November 2, 2016: Journal of Patient Safety
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