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Ankle arthroplasty

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https://www.readbyqxmd.com/read/28196036/a-prospective-study-of-four-total-ankle-arthroplasty-implants-by-non-designer-investigators
#1
Tina Lefrancois, Alastair Younger, Kevin Wing, Murray J Penner, Peter Dryden, Hubert Wong, Timothy Daniels, Mark Glazebrook
BACKGROUND: There are several types of prostheses available to surgeons when performing a total ankle arthroplasty (TAA). The main objective of this study was to summarize the clinical and functional outcomes of 4 TAA prostheses: the Hintegra implant (Integra LifeSciences), the Agility implant (DePuy), the Mobility implant (DePuy), and the Scandinavian Total Ankle Replacement (STAR) implant (Small Bone Innovations [SBi]). METHODS: Patients were prospectively recruited...
February 15, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28185754/does-residual-varus-alignment-cause-increasing-varus-laxity-at-a-minimum-of-five-years-after-total-knee-arthroplasty
#2
Kazuhisa Hatayama, Masanori Terauchi, Kenichi Saito, Hiroshi Higuchi
BACKGROUND: The purpose of this study is to investigate whether varus-valgus laxity of cruciate-retaining (CR) total knee arthroplasty (TKA) changes between 1 year and >5 years after surgery based on postoperative limb alignment. METHODS: One hundred twenty-one varus osteoarthritic knees that underwent CR TKA were included. The minimum follow-up was 5 years. Weight-bearing full-leg radiographs were obtained postoperatively and the hip-knee-ankle (HKA) angle was measured...
January 17, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28155828/elbow-arthroplasty-in-patients-with-bleeding-disorders-preliminary-report-of-a-single-centre-experience
#3
Andrzej Leń, Jerzy Mirosław Jaworski, Joanna Zdziarska, Bartłomiej Skotnicki, Bogusław Frańczuk
Spontaneous or traumatic hemorrhages into joints that occur in the course of congenital bleeding disorders due to deficiencies of plasma clotting factors lead to early and extensive damage to joints. Arthropathy in those patients most commonly affects the knee, elbow and ankle. Replacement surgery of the damaged joint is the only effective way to treat such advanced changes. Although arthritis of the elbow is quite common, surgery is rarely undertaken; hence relevant reports in the literature are limited to individual or small groups of cases...
March 23, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28148666/custom-made-total-ankle-arthroplasty-for-the-salvage-of-major-talar-bone-loss
#4
J Wagener, C E Gross, C Schweizer, T Horn Lang, B Hintermann
AIMS: A failed total ankle arthroplasty (TAA) is often associated with much bone loss. As an alternative to arthrodesis, the surgeon may consider a custom-made talar component to compensate for the bone loss. Our aim in this study was to assess the functional and radiological outcome after the use of such a component at mid- to long-term follow-up. PATIENTS AND METHODS: A total of 12 patients (five women and seven men, mean age 53 years; 36 to77) with a failed TAA and a large talar defect underwent a revision procedure using a custom-made talar component...
February 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28144722/presence-of-rotational-errors-in-long-leg-radiographs-after-total-knee-arthroplasty-and-impact-on-measured-lower-limb-and-component-alignment
#5
Günther Maderbacher, Clemens Baier, Achim Benditz, Ferdinand Wagner, Felix Greimel, Joachim Grifka, Armin Keshmiri
PURPOSE: Rotation of the lower limb in weight bearing long leg radiographs has a great impact on measured component and lower limb alignment parameters. We asked which rotational errors of long leg radiographs are present in a high volume centre and which radiological and clinical consequences arise regarding measured coronal component and lower limb alignment after total knee arthroplasty. METHODS: In 100 long leg radiographs coronal femoral and tibial component alignment and hip knee ankle angle (HKA) were measured...
January 31, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28144149/can-achilles-tendon-be-used-as-a-new-distal-landmark-for-coronal-tibial-component-alignment-in-total-knee-replacement-surgery-an-observational-mri-study
#6
Uğur Tiftikçi, Sancar Serbest, Veysel Burulday
BACKGROUND: In total knee arthroplasty, it is better to use more than one reference point for correct alignment of the components. By measuring the distances of Achilles tendon (AT) and other conventional landmarks from the mechanical axis in magnetic resonance imaging (MRI) of the ankle, we aimed to demonstrate that, as a novel landmark which can help for correct alignment in the coronal plane, AT is a better option than other landmarks. MATERIALS AND METHODS: This retrospective study was done on 53 ankle MRIs that met the criteria for inclusion to the study among 158 ankle MRIs...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28139190/patient-specific-instrumentation-for-total-knee-arthroplasty
#7
Arash Nabavi, Caroline M Olwill, Mike Do, Tanya Wanasawage, Ian A Harris
PURPOSE: To assess the accuracy of total knee replacements (TKRs) performed using CT-based patient-specific instrumentation by postoperative CT scan. METHOD: Approval from the Ethics Committee was granted prior to commencement of this study. Fifty prospective and consecutive patients who had undergone TKR (Evolis, Medacta International) using CT-based patient-specific instrumentation (MY KNEE, Medacta International) were assessed postoperatively using a CT scan and the validated Perth protocol measurement technique...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28126027/functional-analysis-of-distraction-arthroplasty-in-the-treatment-of-ankle-osteoarthritis
#8
Hongmou Zhao, Wenqing Qu, Yi Li, Xiaojun Liang, Ning Ning, Yan Zhang, Dong Hu
BACKGROUND: Ankle joint distraction arthroplasty (AJDA) is an alternative surgical procedure for the management of moderate to severe ankle osteoarthritis. However, the benefit of this procedure and failure relative factors are still in debate. The purpose of the current study was to evaluate the functional outcomes of AJDA in treatment of moderate to severe ankle OA and to evaluate the relative factors correlated with treatment failure. METHODS: Forty-six van Dijk stages II and III ankle osteoarthritis patients were included...
January 26, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28122388/clinical-study-of-3d-imaging-and-3d-printing-technique-for-patient-specific-instrumentation-in-total-knee-arthroplasty
#9
Bing Qiu, Fei Liu, Bensen Tang, Biyong Deng, Fang Liu, Weimin Zhu, Dong Zhen, Mingyuan Xue, Mingjiao Zhang
Patient-specific instrumentation (PSI) was designed to improve the accuracy of preoperative planning and postoperative prosthesis positioning in total knee arthroplasty (TKA). However, better understanding needs to be achieved due to the subtle nature of the PSI systems. In this study, 3D printing technique based on the image data of computed tomography (CT) has been utilized for optimal controlling of the surgical parameters. Two groups of TKA cases have been randomly selected as PSI group and control group with no significant difference of age and sex (p > 0...
January 25, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28120025/the-accuracy-of-a-hand-held-navigation-system-in-total-knee-arthroplasty
#10
Bryan Loh, Jerry Yongqiang Chen, Andy Khye Soon Yew, Hee Nee Pang, Darren Keng Jin Tay, Shi-Lu Chia, Ngai Nung Lo, Seng Jin Yeo
INTRODUCTION: This study aims to evaluate the effectiveness of a new hand-held navigation system. The authors of this study hypothesize that this navigation system will improve overall lower limb alignment and implant placement without causing a delay in surgery. PATIENTS AND METHODS: Two hundred consecutive patients diagnosed with tricompartmental osteoarthritis and underwent total knee arthroplasty by a senior surgeon were included in this study. One hundred patients underwent TKA using the hand-held navigation system, while the other 100 patients underwent TKA using the conventional technique...
January 24, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28117217/experience-of-total-knee-arthroplasty-using-a-novel-navigation-system-within-the-surgical-field
#11
Richard Niehaus, David Schilter, Paolo Fornaciari, Christian Weinand, Marcus Boyd, Marcel Ziswiler, Stefan Ehrendorfer
BACKGROUND: With the aim of improving component alignment and outcome in total knee arthroplasty (TKA), several computer-assisted devices (CAD) have been developed. METHODS: In February 2014, the present unit started to use a new imageless navigation system with accelerometric pods within the surgical field for all primary TKAs; there was no need for optical trackers or cameras. This paper presents the results of the first 72 TKAs using this iAssist system in 71 prospectively collected and retrospectively analyzed patients...
January 20, 2017: Knee
https://www.readbyqxmd.com/read/28116268/pseudoaneurysm-of-the-posterior-tibial-artery-following-removal-of-tibial-plate-a-rare-case
#12
Salman Ghaffari, Hossein Farsavian, Seyed Mohamad Mehdi Daneshpoor, Masoud Shayesteh
INTRODUCTION: Pseudoaneurysm is a rare complication reported after any surgery such as ORIF of fracture, plate removal, ankle or knee arthroscopy or arthroplasty. To our knowledge, pseudoaneurysms of the posterior tibial artery after tibial plate removal are a rare phenomenon. We report a case of a 18-year-old male patient who had pseudoaneurysm of posterior tibial artery following plate removal. CASE PRESENTATION: A 18-year-old male was referred to our outpatient clinic because of mass-like lesion in his left calf...
July 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28110363/bone-morphotypes-of-the-varus-and-valgus-knee
#13
E Thienpont, P E Schwab, O Cornu, J Bellemans, J Victor
BACKGROUND: Coronal deformity correction with total knee arthroplasty (TKA) is an important feature in the treatment of osteoarthritis (OA). The hypothesis of this study was that bone morphology would be different in varus and valgus deformity, both before osteoarthritis development as well as during and after the disease process of OA. MATERIALS AND METHODS: Retrospective study with measurements on preoperative and postoperative full leg standing radiographs of 96 patients who underwent TKA...
January 21, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28079703/metal-artifact-reduction-magnetic-resonance-imaging-around-arthroplasty-implants-the-negative-effect-of-long-echo-trains-on-the-implant-related-artifact
#14
Neil M Kumar, Cesar de Cesar Netto, Lew C Schon, Jan Fritz
OBJECTIVES: Long echo train length (ETL) is an often recommended but unproven technique to decrease metal artifacts on magnetic resonance imaging (MRI) scans. Therefore, we quantitatively and qualitatively assessed the effects of ETL on metal artifact on MRI scans using a cobalt-chromium-containing arthroplasty implant system. MATERIALS AND METHODS: Using a total ankle arthroplasty system implanted into a human cadaver ankle and a clinical 1.5 T MRI system, turbo spin echo (TSE) pulse sequences were acquired with ETL ranging from 3 to 23 and receiver bandwidth (BW) from 100 to 750 Hz/pixel, whereas effective echo time and spatial resolution were controlled...
January 9, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28061741/economic-analysis-and-patient-satisfaction-associated-with-outpatient-total-ankle-arthroplasty
#15
Tyler Gonzalez, Erica Fisk, Christopher Chiodo, Jeremy Smith, Eric Bluman
BACKGROUND: Total ankle arthroplasty (TAA) is a rapidly growing treatment for end-stage ankle arthritis that is generally performed as an inpatient procedure. The feasibility of outpatient total ankle arthroplasty (OTAA) has not been reported in the literature. We sought to establish proof of concept for OTAA by comparing outpatient vs inpatient perioperative complications, postoperative emergency department (ED) visits, readmissions, patient satisfaction, and cost analysis. METHODS: From July 2010 to September 2015, a total of 36 patients underwent TAA...
December 1, 2016: Foot & Ankle International
https://www.readbyqxmd.com/read/28053250/the-painful-total-ankle-arthroplasty-a-diagnostic-and-treatment-algorithm
#16
REVIEW
E Vulcano, M S Myerson
The last decade has seen a considerable increase in the use of in total ankle arthroplasty (TAA) to treat patients with end-stage arthritis of the knee. However, the longevity of the implants is still far from that of total knee and hip arthroplasties. The aim of this review is to outline a diagnostic and treatment algorithm for the painful TAA to be used when considering revision surgery. Cite this article: Bone Joint J 2017;99-B:5-11.
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28043936/do-foot-ankle-assessments-assist-the-explanation-of-1-year-knee-arthroplasty-outcomes
#17
L S Gates, C J Bowen, M T Sanchez-Santos, A Delmestri, N K Arden
OBJECTIVE: Whilst a number of risk factors for poor patient reported outcome measures (PROMs) following knee arthroplasty (KA) have been identified, unexplained variability still remains. The role of pre-operative foot and ankle status on such outcomes has not been investigated. The aim of this study was therefore to determine the association of clinical foot and ankle assessments with patient reported outcomes 1 year following KA. DESIGN: One hundred and fifteen participants from the Clinical Outcomes in Arthroplasty Study (COASt), underwent detailed foot and ankle assessments at baseline, prior to KA (2012-2014) and were followed up for self-reported outcomes 1 year after surgery...
December 30, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28030511/ankle-distraction-arthroplasty-indications-technique-and-outcomes
#18
Mitchell Bernstein, Jay Reidler, Austin Fragomen, S Robert Rozbruch
Ankle distraction is an alternative to ankle arthrodesis or total ankle arthroplasty in younger patients with arthritis. Ankle distraction involves the use of external fixation to mechanically unload the ankle joint, which allows for stable, congruent range of motion in the setting of decreased mechanical loading, potentially promoting cartilage repair. Adjunct surgical procedures are frequently done to address lower-extremity malalignment, ankle equinus contractures, and impinging tibiotalar osteophytes. Patients can bear full weight during the treatment course...
February 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28029391/off-hour-surgery-among-orthopedic-subspecialties-at-an-urban-quaternary-care-level-1-trauma-center
#19
Amanda Lans, Stein J Janssen, David Ring
PURPOSE: We sought to determine and quantify which subspecialties of orthopedic surgeons are operating off hours in an urban, quaternary-care, level 1 trauma center. MATERIALS AND METHODS: We used our clinical registry to identify 43,211 orthopedic surgeries performed between January 2008 and December 2011. Our outcome measures were the number and proportion of off-hour surgeries performed as well as the number and proportion of off-hours per subspecialty. The denominators were the total number of surgeries and the total number of surgical hours worked per subspecialty...
October 28, 2016: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28017574/correcting-severe-varus-deformity-using-trial-components-during-total-knee-arthroplasty
#20
Man S Kim, In J Koh, Young J Choi, Yong D Kim, Yong In
BACKGROUND: Extensive medial soft tissue release may be necessary to correct severe varus deformity during total knee arthroplasty (TKA). However, this procedure may result in instability. Here, we describe a novel soft tissue balancing technique, which can minimize medial release in severe varus deformity during TKA. METHODS: Fifty knees (40 patients) with hip-knee-ankle angle of more than 20° of varus were corrected using this technique (group 1). After achieving flexion gap balancing by needle puncturing and spreading of the superficial medial collateral ligament, extension gap balancing was obtained by gradual extension with the trial components in place...
December 1, 2016: Journal of Arthroplasty
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