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https://www.readbyqxmd.com/read/28641476/direct-medical-costs-of-accidental-falls-for-adults-with-transfemoral-amputations
#1
Benjamin Mundell, Hilal Maradit Kremers, Sue Visscher, Kurtis Hoppe, Kenton Kaufman
BACKGROUND: Active individuals with transfemoral amputations are provided a microprocessor-controlled knee with the belief that the prosthesis reduces their risk of falling. However, these prostheses are expensive and the cost-effectiveness is unknown with regard to falls in the transfemoral amputation population. The direct medical costs of falls in adults with transfemoral amputations need to be determined in order to assess the incremental costs and benefits of microprocessor-controlled prosthetic knees...
June 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28630841/bipolar-hemiarthroplasty-in-a-patient-with-above-knee-amputation-surgical-technique
#2
Ramesh Perumal, Santhosh Ram Gaddam, J Vasudeva, J Dheenadhayalan, S Rajasekaran
INTRODUCTION: Femoral neck fractures are a common occurrence in lower limb amputees. Good post-operative results of hip hemiarthroplasty have been described in below-knee amputees. However, to our knowledge, very few such cases have been reported in above-knee amputees. CASE REPORT: We present a case of a 75-year-old male patient who underwent above-knee amputation of the right lower limb for severe crush injury right leg and a bipolar hemiarthroplasty for an ipsilateral fracture neck of femur sustained in the same road traffic accident...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28616704/metallic-ion-release-after-knee-prosthesis-implantation-a-prospective-study
#3
Adrien Lons, Sophie Putman, Gilles Pasquier, Henri Migaud, Elodie Drumez, Julien Girard
INTRODUCTION: Metal-on-metal (MoM) hip replacement bearings produce metallic ions that can cause health complications. Metallic release also occurs with other materials, but data on metallic ion levels after knee arthroplasty are sparse. We postulate that knee replacement generates elevating metallic ions (chromium (Cr), cobalt (Co) and titanium (Ti)) during the first year after implantation. PATIENTS AND METHODS: This ongoing prospective study included all patients who underwent the same type of knee arthroplasty between May and December 2013...
June 14, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28608283/geometric-morphometric-analysis-reveals-age-related-differences-in-the-distal-femur-of-europeans
#4
Etienne Cavaignac, Frederic Savall, Elodie Chantalat, Marie Faruch, Nicolas Reina, Philippe Chiron, Norbert Telmon
BACKGROUND: Few studies have looked into age-related variations in femur shape. We hypothesized that three-dimensional (3D) geometric morphometric analysis of the distal femur would reveal age-related differences. The purpose of this study was to show that differences in distal femur shape related to age could be identified, visualized, and quantified using three-dimensional (3D) geometric morphometric analysis. METHODS: Geometric morphometric analysis was carried out on CT scans of the distal femur of 256 subjects living in the south of France...
December 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/28607784/use-of-nonvascularized-autologous-fibular-strut-graft-in-the-treatment-of-major-bone-defect-after-periprosthetic-knee-fracture
#5
Vincenzo Giordano, Bruno Parilha Coutinho, Mateus Kenji Miyahira, Felipe Serrão Mendes de Souza, Ney Pecegueiro do Amaral
We present the case of a patient who suffered a comminuted supracondylar periprosthetic femur fracture. The patient was an 86-year-old lady who suffered a minor fall at home and presented at our hospital with a right comminuted distal femur fracture around a total knee arthroplasty. The patient was submitted to a cruciate-sacrificing total knee replacement 6 years before at the same institution. Despite severe metaphyseal fragmentation and short distal fragment, the prosthesis was stable; thus, open fracture reduction and stabilization with internal fixation were performed...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28606122/anterior-tibial-curved-cortex-is-a-reliable-landmark-for-tibial-rotational-alignment-in-total-knee-arthroplasty
#6
Joong Il Kim, Jak Jang, Ki Woong Lee, Hyuk Soo Han, Sahnghoon Lee, Myung Chul Lee
BACKGROUND: Rotational alignment of the tibial component is important for long-term success of total knee arthroplasty (TKA). This study aimed to compare five axes in normal and osteoarthritic (OA) knees to determine a reliable landmark for tibial rotational alignment in TKA. METHODS: One hundred twenty patients with OA knees and 40 with normal knees were included. The angle between a line perpendicular to the surgical transepicondylar axis and each of five axes were measured on preoperative computed tomography...
June 12, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28602534/bilateral-total-hip-and-knee-arthroplasties-average-10-year-follow-up
#7
John B Meding, Philip M Faris, Ken E Davis
BACKGROUND: The present study investigates the clinical and radiographic outcomes in patients with all 4 major lower extremity joints replaced. METHODS: A retrospective review of our institution's database identified 125 patients in whom both hips and both knees were replaced. The mean time between the first and last arthroplasty was 6.6 years. Preoperative diagnoses included osteoarthritis in 80% and rheumatoid arthritis in 20%. The average age at the time of the first arthroplasty was 63...
May 22, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28602486/supramacroparticulate-pe-in-6-different-joint-endoprostheses-localisations-an-indicator-for-pe-damage
#8
Simon Krenn, Marc Thomsen, Sylvia Usbeck, Leslie F Scheuber, Friedrich Boettner, Manfred Georg Krukemeyer, Monika Huber, Jan Philippe Kretzer, Thorsten Gehrke, Veit Krenn
In the histopathological particle algorithm polyethylene (PE) particles with maximum lengths of more than 100μm - called PE supramacroparticles - are identified exclusively for knee joint and hip prostheses. However, a definitive characterisation, detection in all joint localisations and a causal clarification of the pathogenesis are lacking. In this study a total of 175 SLIM (synovial-like interface membrane) cases with PE supramacroparticles of knee joint prostheses (n=89), hip joint prostheses (n=44), ankle joint prostheses (n=36) and prostheses in three localisations of the upper extremities (n=6) were systematically investigated...
March 31, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28601246/clinical-outcome-of-medial-pivot-compared-with-press-fit-condylar-sigma-cruciate-retaining-mobile-bearing-total-knee-arthroplasty
#9
Young-Hoo Kim, Jang-Won Park, Jun-Shik Kim
BACKGROUND: The purpose of this study was to compare the long-term clinical results, radiographic results, range of knee motion, patient satisfaction, and the survival rate of Medial-Pivot posterior cruciate-substituting, knee prosthesis and a press-fit condylar (PFC) Sigma cruciate-retaining mobile-bearing knee prosthesis in the same patients. METHODS: One hundred eighty-two patients received Medial-Pivot knee prosthesis in one knee and a PFC Sigma knee prosthesis in the contralateral knee...
May 18, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28600383/validation-of-static-and-dynamic-radiostereometric-analysis-of-the-knee-joint-using-bone-models-from-ct-data
#10
K Stentz-Olesen, E T Nielsen, S De Raedt, P B Jørgensen, O G Sørensen, B L Kaptein, M S Andersen, M Stilling
OBJECTIVES: Static radiostereometric analysis (RSA) using implanted markers is considered the most accurate system for the evaluation of prosthesis migration. By using CT bone models instead of markers, combined with a dynamic RSA system, a non-invasive measurement of joint movement is enabled. This method is more accurate than current 3D skin marker-based tracking systems. The purpose of this study was to evaluate the accuracy of the CT model method for measuring knee joint kinematics in static and dynamic RSA using the marker method as the benchmark...
June 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28593060/fracture-of-the-tibial-baseplate-16-years-after-miller-galante-ii-total-knee-arthroplasty
#11
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/28591928/-does-sports-activity-influence-total-knee-arthroplasty-durability-analysis-with-a-follow-up-of-12-years
#12
Christina Valle, Michael Sperr, Christina Lemhöfer, Karla Elida Bartel, Marcus Schmitt-Sody
Background Total knee replacement is the only surgical option to treat painful degenerative osteoarthritis, restore knee function, improve quality of life, and enable patients to return to sports activity. With an aging population expecting an active life after retirement, patients' expectations of improvement after surgery are increasing as well. In view of the growing demand for higher performance, exercise and athletic activity, clinicians have been increasingly forced to question how much athletic activity a patient may resume after total knee replacement, and what types of athletic activity seem to be acceptable...
June 2017: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/28589052/safe-and-effective-reduction-technique-for-intertrochanteric-fracture-with-ipsilateral-below-knee-amputated-limb
#13
Hironori Ochi, Tomonori Baba, Takahiro Hamanaka, Yu Ozaki, Taiji Watari, Yasuhiro Homma, Mikio Matsumoto, Kazuo Kaneko
The positioning of the patient on the fracture table is critical for the successful reduction and operative fixation of intertrochanteric hip fractures. However, this manipulation is challenging with patients who have undergone amputations of their legs. A 97-year-old man presented to the emergency department with symptom of right hip pain following a mechanical fall. He had a below-knee amputation on his right leg following a traffic accident as a 19-year-old and had a below-knee patellar tendon bearing prosthesis fitted to his lower limb for mobility...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28584518/an-investigation-into-a-gear-based-knee-joint-designed-for-lower-limb-prosthesis
#14
M S H Bhuiyan, I A Choudhury, M Dahari, Y Nukman, S Z Dawal
A gear-based knee joint is designed to improve the performance of mechanical-type above-knee prostheses. The gear set with the help of some bracing, and bracket arrangement, is used to enable the prosthesis to follow the residual limb movement. The motion analysis and finite-element analysis (FEA) of knee joint components are carried out to assess the feasibility of the design. The maximum stress of 29.74 MPa and maximum strain of 2.393e-004 are obtained in the gear, whereas the maximum displacement of 7...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28580792/biomechanical-analysis-of-the-universal-2-implant-in-total-wrist-arthroplasty-a-finite-element-study
#15
M K Gislason, E Foster, M Bransby-Zachary, D H Nash
Little is known about the mechanics of in vivo loading on total wrist prostheses where many studies have looked at the mechanics of other types of arthroplasty such as for the hip and the knee which has contributed to the overall success of these types of procedures. Currently surgeons would prefer to carry out arthrodesis on the wrist rather than consider arthroplasty as clinical data have shown that the outcome of total wrist arthroplasty is poorer than compared to the hip and knee. More research is needed on the loading mechanisms of the implants in order to enhance the design of future generation implants...
August 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28566789/prosthetic-knee-joint-infection-due-to-mycobacterium-abscessus
#16
Priyadarshi Amit, Sumeet Rastogi, Sks Marya
Infected total knee arthroplasty (TKA) due to Mycobacterium abscessus is very rare with only three such cases described in literature. Only one case was managed successfully, however, with a prolonged course of anti tubercular therapy. In this case report, we present an elderly lady with infected TKA after 2 years of the primary procedure. Although initially it grew different bacteriae, M. abscessus was isolated during the second debridement. She was successfully treated with total of 5 months of second line anti tubercular drugs with revision prosthesis performed during chemotherapy...
May 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28561156/revision-total-knee-arthroplasty-using-a-constrained-condylar-knee-prosthesis-combined-with-a-posterior-stabilized-articular-surface
#17
Shang-Wen Tsai, Cheng-Fong Chen, Po-Kuei Wu, Chao-Ming Chen, Wei-Ming Chen
No abstract text is available yet for this article.
May 23, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28560009/analysis-of-different-bicruciate-retaining-tibial-prosthesis-design-using-a-three-dimension-finite-element-model
#18
Peiheng He, Xing Li, Shuai Huang, Minghao Liu, Weizhi Chen, Dongliang Xu
The recent interest in bicruciate-retaining prostheses has aimed to address the need for an implant that can mimic a natural knee. Arguments have always existed about survivorship, including loosening and subsidence, as well as tibial preparation in bicruciate-retaining tibial prostheses. The aim of this study was to investigate the biomechanics of a new modular design and other bicruciate-retaining designs using a three-dimensional finite element model under different load conditions to discover which prosthesis was more suitable...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28552448/surgeon-s-preference-in-total-knee-replacement-a-quantitative-examination-of-attributes-reasons-for-alteration-and-barriers-to-change
#19
Christopher J Vertullo, Peter M Grimbeek, Stephen E Graves, Peter L Lewis
BACKGROUND: The reasons why surgeons prefer a particular total knee replacement (TKR) to other viable options with lower cost or lower revision risk remain uncertain. This study examined the concept of surgeon's preference in TKR; including the self-assigned utility of their preferred prosthesis, reasons to alter usual preference and barriers to permanently changing preference. METHODS: Using a multinational electronic survey, 347 TKR performing orthopedic surgeons were studied using anonymous mandatory responses, mutually exclusive closed options, multiple responses blocking, automatic stem randomization, Likert scale weighting, and an absence of neutral options...
April 27, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28551052/fresh-osteochondral-allotransplants-outcomes-failures-and-future-developments
#20
M Tschon, F Veronesi, S Giannini, M Fini
Osteochondral allografts are used to treat many different conditions as acute traumatic large-sized lesions, degenerative osteoarthritis, osteochondritis dissecans, avascular necrosis or in case of failure of previous procedures particularly in young patients for whom primary prosthesis is not desirable. Fresh allografts present the advantage of having mature viable hyaline cartilage, not causing donor morbidity, allowing the restoration of even large defects in a single surgical session. Conversely, they could account for risks of disease transmission, immunologic reactions, and for limited availability...
May 11, 2017: Injury
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