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https://www.readbyqxmd.com/read/28929003/fatal-cobalt-toxicity-after-a-non-metal-on-metal-total-hip-arthroplasty
#1
Rinne M Peters, Pax Willemse, Paul C Rijk, Mels Hoogendoorn, Wierd P Zijlstra
This case illustrates the potential for systemic cobalt toxicity in non-metal-on-metal bearings and its potentially devastating consequences. We present a 71-year-old male with grinding sensations in his right hip following ceramic-on-ceramic total hip arthroplasty (THA). After diagnosing a fractured ceramic liner, the hip prosthesis was revised into a metal-on-polyethylene bearing. At one year postoperatively, X-rays and MARS-MRI showed a fixed reversed hybrid THA, with periarticular densities, flattening of the femoral head component, and a pattern of periarticular metal wear debris and pseudotumor formation...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28916885/geometric-analysis-and-clinical-outcome-of-two-cemented-stems-for-primary-total-hip-replacement-with-and-without-modular-necks
#2
Marcel Haversath, Christine Wendelborn, Marcus Jäger, Boris Schmidt, Wojciech Kowalczyk, Stefan Landgraeber
INTRODUCTION: Restoration of the physiological biomechanical principles of the hip is crucial in total hip replacement. The aim of this study was to compare an arthroplasty system with different offset options (a: Exeter(®)) with a dual-modular stem (b: Profemur Xm(®)). MATERIALS AND METHODS: A local and an inertial coordinate system were used to assist the description of the components' assembly in the prosthesis. A resection line of the femoral head in standard position was added to the arthroplasties and geometric parameters were measured...
September 15, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28914130/high-failure-rate-after-internal-fixation-and-beneficial-outcome-after-arthroplasty-in-treatment-of-displaced-femoral-neck-fractures-in-patients-between-55-and-70-years
#3
Stefan Bartels, Jan-Erik Gjertsen, Frede Frihagen, Cecilia Rogmark, Stein Erik Utvåg
Background and purpose - The treatment of patients between 55 and 70 years with displaced intracapsular femoral neck fracture remains controversial. We compared internal fixation (IF), bipolar hemiarthroplasty (HA) and total hip arthroplasty (THA) in terms of mortality, reoperations and patient-reported outcome by using data from the Norwegian Hip Fracture Register. Patients and methods - We included 2,713 patients treated between 2005 and 2012. 1,111 patients were treated with IF, 1,030 with HA and 572 patients with THA...
September 15, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28910774/influence-of-hip-prosthesis-size-and-its-coating-area-on-bone-remodelling
#4
B-A Behrens, A Bouguecha, M Lerch, H Windhagen, A Almohallami
We developed a numerical model to describe the bone remodelling process in periprosthetic bone tissues and validated it by means of dual energy X-ray absorptiometry methods (DEXA) with different types of hip implants. In this study we applied the numerical model to investigate the influence of implant size and of the size of the porous coated area on bone remodelling in a periprosthetic human femur in an effort to define properties of implants which would reduce bone remodelling after total hip arthroplasty...
September 11, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28906135/cement-fragment-from-hip-arthroplasty-causing-deep-femoral-artery-pseudoaneurysm
#5
Luis Gorospe, Ricardo Tobío-Calo, Ricardo Rodríguez-Díaz, Carol Fernanda Gómez-Barbosa, Isabel García Gómez-Muriel, Raquel García-Latorre
An 81-year-old woman who had undergone total hip arthroplasty 12 years earlier presented with a painful spontaneous hematoma in the proximal left thigh. A left hip radiograph showed a displaced cement fragment from the acetabular component of the hip prosthesis. Computed tomography confirmed an extruded cement fragment causing a large pseudoaneurysm of the deep femoral artery. The patient underwent successful percutaneous embolization of the pseudoaneurysm with coils.
January 1, 2017: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/28900863/metal-on-metal-hip-joint-prostheses-a-retrospective-case-series-investigating-the-association-of-systemic-toxicity-with-serum-cobalt-and-chromium-concentrations
#6
James H Ho, Jerrold B Leikin, Paul I Dargan, John R H Archer, David M Wood, Jeffrey Brent
INTRODUCTION: There have been concerns about prosthesis failure and the potential for systemic toxicity due to release of cobalt and chromium from metal-on-metal hip joint prostheses (MoM-HP). There is conflicting evidence on whether there is a correlation between higher cobalt and chromium concentrations and systemic toxicity. METHODS: We undertook a retrospective review of consecutive patients with MoM-HP referred for outpatient review in toxicology clinics in London, UK, and in the USA recorded in the Toxicology Investigators Consortium (ToxIC) Registry from June 2011 to June 2015...
September 12, 2017: Journal of Medical Toxicology: Official Journal of the American College of Medical Toxicology
https://www.readbyqxmd.com/read/28900737/the-benefit-of-the-systematic-revision-of-the-acetabular-implant-in-favor-of-a-dual-mobility-articulation-during-the-treatment-of-periprosthetic-fractures-of-the-femur-a-49-cases-prospective-comparative-study
#7
A Perrin, M Saab, S Putman, K Benad, E Drumez, C Chantelot
INTRODUCTION: The SOFCOT symposium (2005) on periprosthetic fractures of the femur (PFFs) highlighted a high rate of dislocation (15.6% at 6 months) after change of prosthesis. So far, no study has ever proved the benefit of dual-mobility articulation during PFFs revisions. We conducted a comparative study on two prospective cohorts in order to (1) assess the influence of systematic acetabular revision in favor of a double mobility on dislocation rate (2) and in order to evaluate the rate of morbidity associated with this extra surgical procedure...
September 12, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28899125/reduction-of-metal-artifacts-from-unilateral-hip-arthroplasty-on-dual-energy-ct-with-metal-artifact-reduction-software
#8
Dong Yue, Cheng Fan Rong, Cai Ning, Hu Liang, Liu Ai Lian, Wang Ru Xin, Luo Ya Hong
Background The evaluation of hip arthroplasty is a challenge in computed tomography (CT). The virtual monochromatic spectral (VMS) images with metal artifact reduction software (MARs) in spectral CT can reduce the artifacts and improve the image quality. Purpose To evaluate the effects of VMS images and MARs for metal artifact reduction in patients with unilateral hip arthroplasty. Material and Methods Thirty-five patients underwent dual-energy CT. Four sets of VMS images without MARs and four sets of VMS images with MARs were obtained...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28885644/detection-of-total-hip-arthroplasties-at-airport-security-checkpoints-how-do-updated-security-measures-affect-patients
#9
Kimona Issa, Todd P Pierce, Chukwuweieke Gwam, Anthony Festa, Anthony J Scillia, Michael A Mont
INTRODUCTION: There have been historical reports on the experiences of patients with total hip arthroplasty (THA) passing through standard metal detectors at airports. The purpose of this study was to analyse those who had recently passed through airport security and the incidence of: (i) triggering of the alarm; (ii) extra security searches; and (iii) perceived inconvenience. METHODS: A questionnaire was given to 125 patients with a THA during a follow-up appointment...
September 5, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28883822/the-role-of-the-chemokine-system-in-tissue-response-to-prosthetic-by-products-leading-to-periprosthetic-osteolysis-and-aseptic-loosening
#10
REVIEW
Tereza Dyskova, Jiri Gallo, Eva Kriegova
Millions of total joint replacements are performed annually worldwide, and the number is increasing every year. The overall proportion of patients achieving a successful outcome is about 80-90% in a 10-20-years time horizon postoperatively, periprosthetic osteolysis (PPOL) and aseptic loosening (AL) being the most frequent reasons for knee and hip implant failure and reoperations. The chemokine system (chemokine receptors and chemokines) is crucially involved in the inflammatory and osteolytic processes leading to PPOL/AL...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28883009/total-knee-prosthesis-infected-with-mycobacterium-tuberculosis
#11
Fatehi E Elzein, Mohammed Haris, Saad S Alolayan, Nisreen Al Sherbini
Mycobacterium tuberculosis (MTB) infection of a prosthetic joint is rarely reported in developed countries.(1) Typically, MTB infection involves the hips or knees, and the infection can occur secondary to crushing and degradation of the granuloma during surgery or, less commonly, from distant foci spreading through the blood. In the present case, MTB infection likely resulted from haematogenous spread since multiple hot spots suggestive of MTB infection were noted in other sites. Early diagnosis allows for antitubercular therapy with retention of the prosthesis, while late diagnosis frequently results in removal and reimplantation of the joint...
September 7, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28873093/machine-learning-techniques-for-the-optimization-of-joint-replacements-application-to-a-short-stem-hip-implant
#12
Myriam Cilla, Edoardo Borgiani, Javier Martínez, Georg N Duda, Sara Checa
Today, different implant designs exist in the market; however, there is not a clear understanding of which are the best implant design parameters to achieve mechanical optimal conditions. Therefore, the aim of this project was to investigate if the geometry of a commercial short stem hip prosthesis can be further optimized to reduce stress shielding effects and achieve better short-stemmed implant performance. To reach this aim, the potential of machine learning techniques combined with parametric Finite Element analysis was used...
2017: PloS One
https://www.readbyqxmd.com/read/28869812/the-effects-of-prosthetic-foot-stiffness-on-transtibial-amputee-walking-mechanics-and-balance-control-during-turning
#13
Courtney E Shell, Ava D Segal, Glenn K Klute, Richard R Neptune
BACKGROUND: Little evidence exists regarding how prosthesis design characteristics affect performance in tasks that challenge mediolateral balance such as turning. This study assesses the influence of prosthetic foot stiffness on amputee walking mechanics and balance control during a continuous turning task. METHODS: Three-dimensional kinematic and kinetic data were collected from eight unilateral transtibial amputees as they walked overground at self-selected speed clockwise and counterclockwise around a 1-meter circle and along a straight line...
August 15, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28869754/the-irisin-hormone-profile-and-expression-in-human-bone-tissue-in-the-bone-healing-process-in-patients
#14
Sancar Serbest, Uğur Tiftikçi, Hacı Bayram Tosun, Üçler Kısa
BACKGROUND Whether or not there is a relationship between the newly-discovered irisin hormone and bone healing is not yet known. The aim of this study was to investigate what effect irisin hormone has on the bone healing process. MATERIAL AND METHODS The study included 21 adult patients with a diagnosed fracture of the lower extremity (femur or tibia). Informed consent was obtained from all the patients. A total of four venous blood samples were taken from the patients: before fracture stabilization, then postoperatively on days 1, 10, and 60...
September 4, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28862217/evaluation-of-the-accuracy-of-various-dose-calculation-algorithms-of-a-commercial-treatment-planning-system-in-the-presence-of-hip-prosthesis-and-comparison-with-monte-carlo
#15
Kheirollah Mohammadi, Mohsen Hassani, Mahdi Ghorbani, Bagher Farhood, Courtney Knaup
PURPOSE: High atomic number elements are commonly used in a hip prosthesis which can cause uncertainty in accurate dose calculations in radiation therapy. The aim of this study is to assess the accuracy of the three various algorithms of ISOgray treatment planning system in the presence of hip prosthesis by Monte Carlo (MC). MATERIALS AND METHODS: A MC model of Siemens PRIMUS linear accelerator has been built and verified by the measured data of the different algorithms of ISOgray treatment planning systems (TPS) in 6 and 15 MV photon beam energies...
July 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28861206/comparison-of-pasteurized-autograft-prosthesis-composite-reconstruction-and-resection-hip-arthroplasty-for-periacetabular-tumors
#16
Seung Yong Lee, Dae-Geun Jeon, Wan Hyeong Cho, Won Seok Song, Chang-Bae Kong
BACKGROUND: Because of the high complication rate of anatomical reconstruction after periacetabular resection, the strategy of resection alone has been revisited. However, in terms of complications and functional outcome, whether resection hip arthroplasty (RHA) shows a superior result to that of pelvic ring reconstruction remains controversial. METHODS: We compared 24 RHAs and 16 pasteurized autograft-prosthesis composite (PPC) reconstructions regarding the complication rates, operative time, blood loss, and functional outcome...
September 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28860397/diagnosis-of-prosthetic-joint-infection-with-alpha-defensin-using-a-lateral-flow-device-a-multicentre-study
#17
MULTICENTER STUDY
P Berger, M Van Cauter, R Driesen, J Neyt, O Cornu, J Bellemans
AIMS: The purpose of this current multicentre study is to analyse the presence of alpha-defensin proteins in synovial fluid using the Synovasure lateral flow device and to determine its diagnostic reliability and accuracy compared with the prosthetic joint infection (PJI) criteria produced by the Musculoskeletal Infection Society (MSIS). PATIENTS AND METHODS: A cohort of 121 patients comprising 85 total knee arthroplasties and 36 total hip arthroplasties was prospectively evaluated between May 2015 and June 2016 in three different orthopaedic centres...
September 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28857428/dose-uncertainties-associated-with-a-set-density-override-of-unknown-hip-prosthetic-composition
#18
James D Rijken, Christopher J Colyer
The dosimetric uncertainties associated with radiotherapy through hip prostheses while overriding the implant to a set density within the TPS has not yet been reported. In this study, the uncertainty in dose within a PTV resulting from this planning choice was investigated. A set of metallic hip prosthetics (stainless steel, titanium, and two different Co-Cr-Mo alloys) were CT scanned in a water bath. Within the TPS, the prosthetic pieces were overridden to densities between 3 and 10 g/cm(3) and irradiated on a linear accelerator...
August 30, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28854938/the-assessment-of-femoral-shaft-morphology-in-the-sagittal-plane-in-chinese-patients-with-osteoarthritis-a-radiographic-analysis
#19
Zhengyuan Bao, Liang Qiao, Jianghui Qin, Jiacheng Xu, Sheng Zhou, Dongyang Chen, Dongquan Shi, Jin Dai, Yao Yao, Qing Jiang, Zhihong Xu
BACKGROUND: The purpose of this study was to analyze femoral shaft sagittal parameters in Chinese osteoarthritis (OA) patients undergoing total knee arthroplasty (TKA) and identify whether the parameters in the coronal plane could be predictors of those in the sagittal plane. METHODS: Standard long-standing anteroposterior and femoral lateral radiographs of 50 lower limbs in 50 Chinese OA patients were included. Sagittal femoral bowing angle (sFBA), angle between femoral distal anterior cortex axis and sagittal mechanical axis (DACSMA), angle between femoral distal anterior cortex axis and sagittal distal anatomic axis (DACSDAA), and angle between femoral sagittal mechanical axis and sagittal distal anatomic axis (SMADAA) were measured...
August 30, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28840118/designing-an-optimized-novel-femoral-stem
#20
Parto Babaniamansour, Mehdi Ebrahimian-Hosseinabadi, Anousheh Zargar-Kharazi
BACKGROUND: After total hip arthroplasty, there would be some problems for the patients. Implant loosening is one of the significant problems which results in thigh pain and even revision surgery. Difference between Young's modulus of bone-metal is the cause of stress shielding, atrophy, and subsequent implant loosening. MATERIALS AND METHODS: In this paper, femoral stem stiffness is reduced by novel biomechanical and biomaterial design which includes using proper design parameters, coating it with porous surface, and modeling the sketch by the software...
July 2017: Journal of Medical Signals and Sensors
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