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https://www.readbyqxmd.com/read/27909129/metallosis-following-implantation-of-magnetically-controlled-growing-rods-in-the-treatment-of-scoliosis-a-case-series
#1
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
#2
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
#3
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
#4
Stephen Tower
No abstract text is available yet for this article.
November 2, 2016: Journal of Patient Safety
https://www.readbyqxmd.com/read/27799229/severe-metallosis-following-oxidised-zirconium-wear-in-total-hip-arthroplasty
#5
Erato Gkouliopoulou, Filon Agathangelidis, Themistoklis Vampertzis, Thomas Ntovas
No abstract text is available yet for this article.
October 31, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27765174/implant-failure-stratos-system-for-pectus-repair
#6
Prashant K Sharma, Tineke P Willems, Daan J Touw, Willem Woudstra, Michiel E Erasmus, Tjark Ebels
BACKGROUND: Three European centers have recently reported dramatic failures of the STRATOS titanium system, approved in Europe and the United States since 2007 and meant for pectus repair, without detailed exploration of its causes. METHODS: Failed implants (fractures or loosened crimp connectors) were surgically explanted from 12 patients and biopsies taken from surrounding discolored tissue. Detailed failure analysis was performed to find the cause of failures...
October 17, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27739572/early-catastrophic-failure-of-a-pinnacle-marathon%C3%A2-polyethylene-acetabular-liner-a-report-of-a-malpositioned-pinnacle-duofix-ha%C3%A2-acetabular-shell-resulting-in-point-loading-and-accelerated-wear
#7
Daniel S Hill, Kuntal Patel, Deepak Herlekar
BACKGROUND: Highly cross-linked polyethylene in total hip arthroplasty (THA) has been shown to decrease wear rate compared with a conventional polyethylene liner. However, it has also been reported that the manufacturing processes can cause early failure of the implant. CASE: We describe early catastrophic failure at <4 years following primary THA surgery of a PINNACLE MARATHON® polyethylene acetabular liner resulting from a malaligned PINNACLE DUOFIX HA® acetabular shell with resultant point loading...
October 13, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/27648325/metallosis-after-exchange-of-the-femoral-head-and-liner-following-ceramic-acetabular-liner-dissociation-in-total-hip-arthroplasty-with-a-modular-layered-acetabular-component
#8
Tomoya Takasago, Tomohiro Goto, Keizo Wada, Daisuke Hamada, Toshiyuki Iwame, Tetsuya Matsuura, Akihiro Nagamachi, Koichi Sairyo
The type of bearing material that should be used in revision surgery after the failure of ceramic-on-ceramic total hip arthroplasty (THA) remains controversial. In the case of ceramic fracture, the residual ceramic particles can cause consequent metallosis when metal implants are used for revision THA. On the other hand, in the case of THA failure without ceramic fracture, revision THA with a metal femoral head provides satisfactory results. We report an unusual case of progressive osteolysis due to metallosis that developed after revision THA for ceramic liner dissociation without a liner fracture performed using a metal femoral head and polyethylene liner...
2016: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/27615181/-are-the-cobalt-hip-prosthesis-dangerous
#9
Virginie Mistretta, William Kurth, Corinne Charlier
The placement of a hip prosthesis is one of the most common orthopedic surgical procedures. Some implants contain metal and are therefore capable of releasing metal particles like cobalt in patients who wear metal prostheses. Cobalt can be responsible of local toxicity (including metallosis, hypersensitivity reaction, and benign tumor) or systemic toxicity (including cardiomyopathy, polycythemia, hypothyroidism, and neurological disorders). To monitor potential toxicity of metal hip prostheses, an annual monitoring of patients implanted is recommended and includes clinical examination, radiological examination and blood cobalt determination...
August 2016: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/27491800/fatal-cobalt-toxicity-after-total-hip-arthroplasty-revision-for-fractured-ceramic-components
#10
Kimberly A Fox, Todd M Phillips, Joseph H Yanta, Michael G Abesamis
CONTEXT: Post-arthroplasty metallosis, which refers to metallic corrosion and deposition of metallic debris in the periprosthetic soft tissues of the body, is an uncommon complication. Systemic cobalt toxicity post-arthroplasty is extremely rare. The few known fatal cases of cobalt toxicity appear to be a result of replacing shattered ceramic heads with metal-on-metal or metal-on-polyethylene implants. Friction between residual shards of ceramic and cobalt-chromium implants allows release of cobalt into the synovial fluid and bloodstream, resulting in elevated whole blood cobalt levels and potential toxicity...
November 2016: Clinical Toxicology
https://www.readbyqxmd.com/read/27412499/metallosis-after-swanson-spacer-as-indication-for-volar-synovectomy-12-years-after-implantation
#11
Klemens Trieb
: The treatment of metacarpophalangeal destruction by rheumatoid arthritis is often an indication for joint replacement, here the swanson spacer still has his place. The flexible spacer may be implanted with or without titanium guide sleeves ("grommets"). However, the imaginary abrasion protection for the silicone grommets may in turn lead through micro-movements to wear as it is observed in the case shown here. PATIENTS AND METHODS: One over a period of 30 years suffering from rheumatoid arthritis 69 years old female patient is presented...
July 8, 2016: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/27343056/how-reliable-is-the-alpha-defensin-immunoassay-test-for-diagnosing-periprosthetic-joint-infection-a-prospective-study
#12
Tommaso Bonanzinga, Akos Zahar, Michael Dütsch, Christian Lausmann, Daniel Kendoff, Thorsten Gehrke
BACKGROUND: A key issue in the treatment of periprosthetic joint infection (PJI) is the correct diagnosis. The main problem is lack of diagnostic tools able to diagnose a PJI with high accuracy. Alpha-defensin has been proposed as a possible solution, but in the current literature, there is a lack of independent validation. QUESTIONS/PURPOSES: We performed a prospective study to determine (1) what is the sensitivity, specificity, and positive and the negative predictive values of the alpha-defensin immunoassay test in diagnosing PJI; and (2) which clinical features may be responsible for false-positive and false-negative results? METHODS: Preoperative aspiration was performed in all patients presenting with a painful hip/knee arthroplasty, including both primary and revision implants...
June 24, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27299099/orthogonal-double-plating-and-autologous-bone-grafting-of-postoperative-humeral-shaft-nonunion-a-rare-case-report-and-review-of-literature
#13
Sreenivasulu Metikala, Prabhudheer Bhogadi
INTRODUCTION: Nonunion following surgical stabilization of humeral shaft fractures, although infrequent, remains a challenge as limited surgical options are available. The difficulties in re-fixation are due to osteolysis produced by the loose implant components and disuse osteopenia of the entire bone segment. We share our experience in the management of a long standing diaphyseal nonunion of humerus following titanium LCP fixation. CASE REPORT: A 58 years old woman presented with 20 months old nonunion following titanium LCP fixation of her closed humeral shaft fracture, done elsewhere...
October 2015: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/27295601/cobalt-chromium-metallosis-with-normal-electroretinogram
#14
Lola M Grillo, Huy V Nguyen, Stephen H Tsang, Donald C Hood, Jeffrey G Odel
BACKGROUND: Ocular cobalt toxicity is a rare phenomenon reported with increased frequency due to the rise of cobalt-chromium metal hip implants. We report the case of a 66-year-old previously healthy man who developed decreased vision due to cobalt-chromium toxicity from a metal-on-metal hip arthroplasty. Our objective was to determine whether the origin of his visual loss was due to toxicity of the optic nerve, of the retina, or of both. METHODS: Ocular examination, 10-2 SITA-Standard Humphrey Visual Field (VF), standard full-field electroretinogram (ERG) as indicated by the International Society for Clinical Electrophysiology of Vision (ISCEV), multifocal electroretinogram (mfERG), multifocal visual evoked potentials (mfVEP), and optical coherence tomography (OCT) were conducted...
December 2016: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/27293285/midterm-results-of-36-mm-metal-on-metal-total-hip-arthroplasty
#15
Hawar Akrawi, Fahad S Hossain, Stefan Niculescu, Zaid Hashim, Arron Biing Ng, Ajit Shetty
BACKGROUND: Despite the many perceived benefits of metal-on-metal (MoM) articulation in total hip arthroplasty (THA), there have been growing concerns about metallosis and adverse reaction to metal debris (ARMD). Analysis of size 36 mm MoM articulation THAs is presented. These patients were evaluated for patient characteristics, relationship between blood metal ions levels and the inclination as well as the version of acetabular component, cumulative survival probability at final followup and functional outcome at final followup...
May 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27270787/severe-polyethylene-wear-requiring-revision-total-hip-arthroplasty-in-three-dogs
#16
Valerie E Nesser, Michael P Kowaleski, Randy J Boudrieau
OBJECTIVE: To describe the occurrence of severe polyethylene wear of the acetabular component in 3 dogs that ultimately led to implant failure, and to report the outcome of revision of total hip arthroplasty (THA) in these cases. STUDY DESIGN: Case report ANIMALS: Dogs (n=3). RESULTS: Three dogs with hip dysplasia underwent routine THA before 2 years of age. All dogs became acutely lame 4-5 years after THA. Radiographs revealed acetabular cup wear in all cases, shell fragmentation in 2 cases, and additional stem failure in 1 case...
July 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/27248335/acute-disassembly-and-dissociation-of-a-dual-mobility-next-generation-prosthesis
#17
Jason Samona, Brian Flanagan, Norman Walter
The use of bipolar components in hip surgery was introduced more than 40 years ago with the rationale of a dual-mobility hip implant. This design used a small femoral head that would decrease the rate of wear because of the smaller surface area but would still provide implant stability because of the larger outer shell that articulated with the acetabulum, decreasing dislocation rates. In April 2011, the E1 Active Articulation Hip System (Biomet, Warsaw, Indiana) was introduced to the orthopedic market. It is considered to be part of the next generation of bipolar designs, with similar designs available from competing companies, such as Stryker (Mahwah, New Jersey)...
September 1, 2016: Orthopedics
https://www.readbyqxmd.com/read/27189390/metallosis-with-pseudotumour-formation-long-term-complication-following-cementless-total-hip-replacement-in-a-dog
#18
Nicola J Volstad, Susan L Schaefer, Laura A Snyder, Jeffrey B Meinen, Susannah J Sample
CASE DESCRIPTION: A 10-year-old female Belgian Teruven dog was presented to our clinic for total hip revision following a diagnosis of implant (cup) failure with metallosis and abdominal pseudotumour formation. The patient had a cementless metal-on-polyethylene total hip replacement performed nine years prior to presentation. CLINICAL FINDINGS: The clinical findings, including pseudotumour formation locally and at sites distant from the implant and pain associated with the joint replacement, were similar to those described in human patients with this condition...
July 19, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/27172284/metallosis-presenting-as-a-progressive-neurologic-deficit-four-years-after-a-posterior-spinal-fusion-for-adolescent-idiopathic-scoliosis-a-case-report
#19
Seth H Richman, Andrew J Razzano, Melanie A Morscher, Patrick M Riley
STUDY DESIGN: Case report. OBJECTIVE: To report a case of progressive pain and paraparesis secondary to metallosis four years after a pediatric posterior spinal fusion (PSF). SUMMARY OF BACKGROUND DATA: Metallosis as a late complication of pediatric spinal surgery is rarely reported. Myelographic computed tomography (CT) can be helpful in establishing the diagnosis. The use of serum chromium levels as a means of definitive diagnosis has been suggested, but has only been reported retrospectively...
May 11, 2016: Spine
https://www.readbyqxmd.com/read/26923378/radiological-identification-of-zweym%C3%A3-ller-type-femoral-stem-prosthesis-in-revision-cases
#20
Saverio Affatato, Saverio Comitini, Matteo Fosco, Aldo Toni, Domenico Tigani
INTRODUCTION: Since 1979 the number of patients treated with femoral stems has continued to grow, as well as the number of stems with features similar to the Zweymüller prosthesis produced by different companies. Identification can be problematic in case requiring revision. In the present paper, we present an overview of morphometric differences between the different stem designs, which can be useful for radiologic identification in revision cases. METHODS: By doing some research on the Internet of specialized sites and worldwide literature, we searched for all femoral stems agreeing with Zweymüller principles (cementless, straight, tapered, rectangular cross-sectioned femoral stems)...
February 29, 2016: International Orthopaedics
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