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Total ankle arthroplasty

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https://www.readbyqxmd.com/read/28331989/does-the-tibia-component-design-affect-the-need-for-offset-stems-in-revision-total-knee-arthroplasty
#1
X Foruria, T Schmidt-Braekling, D Arana Nabarte, M Faschingbauer, M Kasparek, F Boettner
INTRODUCTION: The stem/keel location varies between anatomic and symmetric revision tibial baseplates. The current study investigates the impact of an anatomic versus symmetric stem location on the need for offset couplers in revision total knee arthroplasty. MATERIALS AND METHODS: Hip to ankle standing radiographs and lateral radiographs of 75 patients were analyzed using digital templating software. The offset in the anterior-posterior as well as medial-lateral plane between the center of the tibial diaphysis and the stem of the tibial baseplate were determined for an anatomic and symmetric tibial baseplate, respectively...
March 22, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28330757/does-new-instrumentation-improve-radiologic-alignment-of-the-oxford%C3%A2-medial-unicompartmental-knee-arthroplasty
#2
Ki-Mo Jang, Hong Chul Lim, Seung-Beom Han, Chandong Jeong, Seul-Gi Kim, Ji-Hoon Bae
BACKGROUND: A new instrument system has been introduced to improve the accuracy and reproducibility of implant positioning in Oxford® unicompartmental knee arthroplasty (UKA). This study aimed to determine if the new instrumentation could improve postoperative implant positioning and limb alignment, and reduce the occurrence of outliers in Oxford® UKA. METHODS: A total of 77 cases of Oxford® UKA with the new instrumentation were included. Individual matching for the conventional instrument group was performed according to age, sex, and body mass index...
March 19, 2017: Knee
https://www.readbyqxmd.com/read/28306181/total-ankle-replacement-in-patients-with-haemophilic-arthropathy-primary-arthroplasty-and-conversion-of-painful-ankle-arthrodesis-to-arthroplasty
#3
M Preis, T Bailey, M Jacxsens, A Barg
INTRODUCTION: There are two general surgical approaches for operative treatment of end-stage haemophilic ankle arthropathy: ankle arthrodesis and total ankle replacement (TAR). AIM: The aim of this study was to determine intraoperative and postoperative complications and evaluate the mid-term clinical and radiographic outcomes of TAR in patients with haemophilic arthropathy. METHODS: Fourteen patients with a mean age of 51.4 ± 10.2 years (range = 32...
March 17, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28302462/the-impact-of-mechanical-and-restricted-kinematic-alignment-on-knee-anatomy-in-total-knee-arthroplasty
#4
Abdulaziz M Almaawi, Jonathan R B Hutt, Vincent Masse, Martin Lavigne, Pascal-Andre Vendittoli
BACKGROUND: Total knee arthroplasty (TKA), aiming at neutral mechanical alignment (MA), inevitably modifies the patient's native knee anatomy. Another option is kinematic alignment (KA), which aims to restore the original anatomy of the knee. The aim of this study was to evaluate the variations in lower limb anatomy of a patient population scheduled for TKA, and to assess the use of a restricted KA TKA protocol and compare the resulting anatomic modifications with the standard MA technique...
February 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28299385/no-impact-of-under-correction-and-joint-line-obliquity-on-clinical-outcomes-of-total-knee-arthroplasty-for-the-varus-knee
#5
Richard D Rames, Michael Mathison, Zachary Meyer, Robert L Barrack, Denis Nam
PURPOSE: It has been hypothesized that under-correction of a preoperative varus deformity may be more natural and improve outcomes after total knee arthroplasty (TKA). This study's purpose was to assess the impact of hip-knee-ankle (HKA) alignment and joint line obliquity on TKA outcomes for the varus knee. METHODS: All patients with a preoperative varus deformity received both preoperative and postoperative standing, full-length radiographs from which two independent observers performed radiographic measurements including the HKA axis and mechanical medial proximal tibial angle (mMPTA)...
March 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28263806/one-stage-computer-assisted-total-knee-arthroplasty-and-tibial-osteotomy
#6
S Denjean, F Chatain, O Tayot
Same-stage tibial osteotomy may deserve consideration in candidates to total knee arthroplasty (TKA) who have severe bone deformities, particularly at extra-articular sites. This strategy obviates the need for either a major and technically difficult ligament release procedure, which may compromise ligament balancing, or the use of a semi-constrained prosthesis. This technical note describes a one-stage, computer-assisted technique consisting in TKA, followed by corrective tibial osteotomy to obtain an overall mechanical axis close to 180° without extensive ligament balancing...
March 2, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28261425/intermittent-pneumatic-compression-for-the-prevention-of-venous-thromboembolism-after-total-hip-arthroplasty
#7
Hong Suk Kwak, Jai Ho Cho, Jung Taek Kim, Jeong Joon Yoo, Hee Joong Kim
BACKGROUND: Venous thromboembolism (VTE) is a relatively common and potentially life threatening complication after major hip surgery. There are two main types of prophylaxis: chemical and mechanical. Chemical prophylaxis is very effective but causes bleeding complications in surgical wounds and remote organs. On the other hand, mechanical methods are free of hemorrhagic complications but are less effective. We hypothesized that mechanical prophylaxis is effective enough for Asians in whom VTE occurs less frequently...
March 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28196036/a-prospective-study-of-four-total-ankle-arthroplasty-implants-by-non-designer-investigators
#8
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
#9
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/28148666/custom-made-total-ankle-arthroplasty-for-the-salvage-of-major-talar-bone-loss
#10
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
#11
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
#12
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
#13
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/28122388/clinical-study-of-3d-imaging-and-3d-printing-technique-for-patient-specific-instrumentation-in-total-knee-arthroplasty
#14
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
#15
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
#16
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/28110363/bone-morphotypes-of-the-varus-and-valgus-knee
#17
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
#18
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
#19
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
#20
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
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