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https://www.readbyqxmd.com/read/29164328/metallosis-after-traumatic-loosening-of-bryan-cervical-disc-arthroplasty-a-case-report-and-literature-review
#1
Chih-Chan Yang, Chien-Lun Tang, Chung-Yuh Tzeng, Hsi-Kai Tsou
PURPOSE: Cervical disc arthroplasty has been a popular alternative to traditional arthrodesis treatment for maintaining postoperative cervical spine mobility. However, certain adverse reactions to cervical disc arthroplasty have emerged during the last few decades. METHODS: Metallosis or metalloma is a rarely reported complication after spinal fusion or spinal arthroplasty surgery. We report on the first metallosis case occurring in a patient who received Bryan Disc implantation approximately 8 years earlier...
November 21, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29130357/biological-effects-of-metal-degradation-in-hip-arthroplasties
#2
Donatella Granchi, Lucia Maria Savarino, Gabriela Ciapetti, Nicola Baldini
Metals and metal alloys are the most used materials in orthopedic implants. The focus is on total hip arthroplasty (THA) that, though well tolerated, may be associated with local and remote adverse effects in the medium-long term. This review aims to summarize data on the biological consequences of the metal implant degradation that have been attributed predominantly to metal-on-metal (MoM) THA. Local responses to metals consist of a broad clinical spectrum ranging from small asymptomatic tissue lesions to severe destruction of bone and soft tissues, which are designated as metallosis, adverse reactions to metal debris (ARMD), aseptic lymphocytic vasculitis associated lesion (ALVAL), and pseudotumors...
November 13, 2017: Critical Reviews in Toxicology
https://www.readbyqxmd.com/read/29128529/laser-processed-calcium-phosphate-reinforced-cocrmo-for-load-bearing-applications-processing-and-wear-induced-damage-evaluation
#3
Himanshu Sahasrabudhe, Susmita Bose, Amit Bandyopadhyay
To mitigate shortcomings in current biomedical CoCrMo alloy, composites of CoCrMo with calcium phosphate (CaP) were envisioned. CoCrMo alloy was reinforced with CaP to enhance the wear resistance of the alloy. A powder based direct energy additive manufacturing technique of Laser Engineered Net Shaping (LENS™) was used for processing of CoCrMo alloy with 1% and 3% (by weight) of CaP in the form of hydroxyapaptite. Addition of CaP was found to stabilize the ε (HCP) phase along with the more common γ (FCC) phase of the CoCrMo alloy, and the microstructure showed discontinuous chromium carbide phase...
November 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28980106/severe-metallosis-and-elevated-chromium-in-serum-following-implantation-of-the-joint-unloading-implant-system
#4
Matthias Wolff, Carl Haasper, Akos Zahar, Christian Gauck, Thorsten Gehrke, Mustafa Citak
In recent years, the minimally invasive joint-preserving implant system has been developed. The main goal of this device is to unload the medial knee compartment without affecting the lateral compartment. The current authors describe a severe metallosis and elevated chromium in serum following implantation of the joint unloading implant system of a 50-year-old male patient, presented to our hospital 3 years after implantation of a KineSpring System into his left knee due to unicompartmental medial osteoarthritis (OA) in an external hospital...
October 4, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28972737/friction-stir-processing-of-stainless-steel-for-ascertaining-its-superlative-performance-in-bioimplant-applications
#5
G Perumal, A Ayyagari, A Chakrabarti, D Kannan, S Pati, H S Grewal, S Mukherjee, S Singh, H S Arora
Substrate-cell interactions for a bioimplant are driven by substrate's surface characteristics. In addition, the performance of an implant and resistance to degradation are primarily governed by its surface properties. A bioimplant typically degrades by wear and corrosion in the physiological environment, resulting in metallosis. Surface engineering strategies for limiting degradation of implants and enhancing their performance may reduce or eliminate the need for implant removal surgeries and the associated cost...
October 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28917519/endoscopic-or-arthroscopic-iliopsoas-tenotomy-for-iliopsoas-impingement-following-total-hip-replacement-a-prospective-multicenter-64-case-series
#6
W Guicherd, N Bonin, T Gicquel, J E Gedouin, X Flecher, M Wettstein, M Thaunat, N Prevost, E Ollier, O May
INTRODUCTION: Impingement between the acetabular component and the iliopsoas tendon is a cause of anterior pain after total hip replacement (THR). Treatment can be non-operative, endoscopic or arthroscopic, or by open revision of the acetabular component. Few studies have assessed these options. The present study hypothesis was that endo/arthroscopic treatment provides rapid pain relief with a low rate of complications. METHODS: A prospective multicenter study included 64 endoscopic or arthroscopic tenotomies for impingement between the acetabular component and the iliopsoas tendon, performed in 8 centers...
September 13, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28913397/cardiac-transplant-due-to-metal-toxicity-associated-with-hip-arthroplasty
#7
Sheldon Moniz, Sean Hodgkinson, Piers Yates
Concerns regarding metal-on-metal (MoM) bearing couples in total hip arthroplasty are well documented in the literature with cobalt (Co) and chromium (Cr) toxicity causing a range of both local and systemic adverse reactions. We describe the case of a patient undergoing cardiac transplantation as a direct result of Co and Cr toxicity following a MoM hip replacement. Poor implant positioning led to catastrophic wear generating abundant wear particles leading to Co and Cr toxicity, metallosis, bony destruction, elevated metal ion levels, and adverse biological responses...
September 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28781016/blood-metal-ion-levels-have-limited-utility-in-the-surveillance-of-asymptomatic-large-head-metal-on-metal-total-hip-arthroplasties
#8
Manish Kiran, Catherine Armstrong, Deepak Shivarathre, Viju K Peter
BACKGROUND: Blood cobalt (Co) and chromium (Cr) ion levels have been used as surveillance tools for adverse reaction to metal debris (ARMD) in metal-on-metal (MoM) articulations with varying thresholds in different countries. The aim of our study is to present the serial 12-year blood Co and Cr levels in a cohort of MoM total hip arthroplasties (THAs) with femoral head size ≥36 mm and analyze their utility in asymptomatic patients at current thresholds. METHODS: A total of 256 patients with unilateral MoM THA with femoral head size ≥36 mm were included in this study with data collected prospectively...
July 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28709788/making-sense-of-metal-allergy-and-hypersensitivity-to-metallic-implants-in-relation-to-hand-surgery
#9
REVIEW
Thomas J Christensen, Shefali A Samant, Alexander Y Shin
All metals implanted into a biological system undergo some degree of corrosion depending upon its composition. The electrochemical process of corrosion produces free metal ions, which may activate the host's immune system through a variety of mechanisms. Whereas dermal metal hypersensitivity is common, affecting 10% to 15% of the population, the immune reaction from implanted metals is much less common (< 0.1%), but has been associated with metal allergy and hypersensitivity producing a multitude of patient symptoms...
September 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28695178/delayed-diagnosis-of-catastrophic-ceramic-liner-failure-with-resultant-pelvic-discontinuity-and-massive-metallosis
#10
Benjamin A Winston, Ryland P Kagan, Thomas W Huff
With newer-generation ceramic components used in total hip arthroplasty, component fracture is a rare complication. However rare, when ceramic component fracture does occur, prompt identification and revision is necessary as delay can lead to dramatic failure with resultant metallosis as the extremely hard ceramic debris abrades remaining components. We present a case of a 70-year-old woman with ceramic liner fracture and an estimated 10-year delay in intervention with failure resulting in pelvic discontinuity and massive metallosis with associated cutaneous manifestation...
June 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28695177/unusual-presentation-of-failed-metal-on-metal-total-hip-arthroplasty-with-features-of-neoplastic-process
#11
Robert P Runner, Briggs M Ahearn, George N Guild
Metal-on-metal (MoM) total hip arthroplasty (THA) is associated with increased incidence of failure from metallosis, adverse tissue reactions, and the formation of pseudotumors. This case highlights a 53-year-old female with an enlarging painful thigh mass 12 years status post MoM THA. Radiographs and advanced imaging revealed an atypical mass with cortical bone destruction and spiculation, concerning for periprosthetic malignancy. Open frozen section biopsy was performed before undergoing revision THA in a single episode of care...
June 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28651457/metallosis-in-a-dog-as-a-long-term-complication-following-total-hip-arthroplasty
#12
Mallory J DiVincenzo, Galit H Frydman, Michael P Kowaleski, Charles R Vanderburg, Barry Lai, Trisha J Oura, Samuel H Jennings
Metallosis is the accumulation of metallic debris in soft tissues resulting from wear following total joint replacement. A dog was evaluated for lameness 4 years after total hip arthroplasty using a titanium alloy and cobalt chromium total hip system. Radiographs revealed severe acetabular component wear, implant-bone interface deterioration, and peri-acetabular osteolysis. During surgical revision, black periarticular tissue surrounded the implants. Histologically, there was fibrosis and granulomatous inflammation with abundant, intra- and extracellular, black, granular material and smaller amounts of clear punctate to acicular material...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28643347/off-resonance-based-assessment-of-metallic-wear-debris-near-total-hip-arthroplasty
#13
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
#14
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
#15
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
#16
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
#17
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
#18
REVIEW
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
#19
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
#20
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
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