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https://www.readbyqxmd.com/read/28341278/early-outcomes-of-kinematic-alignment-in-primary-total-knee-arthroplasty-a-meta-analysis-of-the-literature
#1
P Maxwell Courtney, Gwo-Chin Lee
BACKGROUND: Kinematic alignment in total knee arthroplasty (TKA) seeks to more anatomically align the knee prosthesis to promote more physiological kinematics. However, there are questions about the durability, function, and complication rate of a non-mechanically aligned TKA. Therefore, the purpose of this study is to perform a systematic review and meta-analysis to evaluate early outcomes after kinematic alignment. METHODS: Two independent reviewers performed a systematic review of the English literature using both the MEDLINE and Embase databases searching for studies on kinematic TKA...
February 27, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28337656/what-factors-are-associated-with-femoral-component-internal-rotation-in-tka-using-the-gap-balancing-technique
#2
Seung-Yup Lee, Hong-Chul Lim, Ki-Mo Jang, Ji-Hoon Bae
BACKGROUND: When using the gap-balancing technique for TKA, excessive medial release and varus proximal tibial resection can be associated with internal rotation of the femoral component. Previous studies have evaluated the causes of femoral component rotational alignment with a separate factor analysis using unadjusted statistical methods, which might result in treatment effects being attributed to confounding variables. QUESTIONS/PURPOSES: (1) What pre- and intraoperative factors are associated with internal rotation of the femoral component in TKA using the gap balancing technique? (2) To what degree does femoral component rotation as defined by the navigation system differ from rotation as measured by postoperative CT? METHODS: Three hundred seventy-seven knees that underwent computer-assisted primary TKA attributable to degenerative osteoarthritis with varus or mild valgus alignment in which medial soft tissue release was performed, and those with preoperative radiographs including preoperative CT between October 2007 and June 2014 were included in the study...
March 23, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28336947/an-ideal-dielectric-coat-to-avoid-prosthesis-rf-artefacts-in-magnetic-resonance-imaging
#3
U Zanovello, L Matekovits, L Zilberti
The number of people submitted to total hip or knee arthroplasty increased in the last years and it is likely to grow further. Hence, the importance of a proper investigation tool that allows to determine and recognize the potential presence of perioperative and/or postoperative diseases becomes clear. Although the Magnetic Resonance Imaging (MRI) technique demonstrated several advantages over the other common tomography tools, it suffers from the arise of image artefacts if it is performed in presence of metallic prostheses...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28335753/leuconostoc-mesenteroides-periprosthetic-knee-infection-an-unusual-fastidious-gram-positive-bacteria-a-case-report
#4
Rafael Franco-Cendejas, Claudia A Colín-Castro, Melissa Hernández-Durán, Luis E López-Jácome, Silvestre Ortega-Peña, Guillermo Cerón-González, Samuel Vanegas-Rodríguez, Jaime A Mondragón-Eguiluz, Eduardo Acosta-Rodríguez
BACKGROUND: Periprosthetic joint infections are mainly caused by Gram-positive cocci. Leuconostoc mesenteroides is a rare microorganism mainly causing bloodstream infections. At times, it might be confused with another type of cocci and give rise to misdiagnosed infections. Molecular diagnosis and biofilm production comprise important techniques to guide antibiotic treatment. CASE PRESENTATION: A 68-year-old Hispanic female with a previous history of bilateral knee arthroplasty presented with acute right-knee inflammation and gait impairment...
March 23, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28332044/no-difference-between-cemented-and-cementless-total-knee-arthroplasty-in-young-patients-a-review-of-the-evidence
#5
REVIEW
Edoardo Franceschetti, Guglielmo Torre, Alessio Palumbo, Rocco Papalia, Jón Karlsson, Olufemi R Ayeni, Kristian Samuelsson, Francesco Franceschi
PURPOSE: The present piece of work provides improved knowledge about the evidence related to TKA in patients 60 years of age or younger, with special focus on fixation methods. Main concern of the review is to analyse the difference of survival rate and complications of cemented and cementless implants. METHODS: An electronic search was carried out between October and December 2015, through CINAHL, PubMed and the Cochrane Central Registry of Controlled Trials web databases...
March 22, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28331851/predicting-factors-for-allogeneic-blood-transfusion-and-excessive-postoperative-blood-loss-after-single-low-dosage-intra-articular-tranexamic-acid-application-in-total-knee-replacement
#6
Paphon Sa-Ngasoongsong, Siwadol Wongsak, Noratep Kulachote, Pongsthorn Chanplakorn, Patarawan Woratanarat, Viroj Kawinwonggowit
Background. Recently, intra-articular tranexamic acid (IA-TXA) application has become a popular method for perioperative blood loss (PBL) reduction in total knee replacement (TKR). Nevertheless, through our knowledge, no previous studies had shown the correlation perioperative factors and the risk of excessive PBL or need of blood transfusion (BT) after IA-TXA. Materials and Methods. A retrospective study was conducted in patients underwent 299 primary TKRs, using IA-TXA, during 2-year period (2013-2014). Patient's characteristic and perioperative data were reviewed and collected...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28326442/long-term-follow-up-of-a-non-randomised-prospective-cohort-of-one-hundred-and-ninety-two-total-knee-arthroplasties-using-the-nexgen-implant
#7
Alfredo Schiavone Panni, Franceso Falez, Rocco D'Apolito, Katia Corona, Carlo Perisano, Michele Vasso
PURPOSE: The purpose of this study was to retrospectively analyse the clinical, functional and radiological outcomes, and the long-term survivorship of the NexGen Legacy Posterior Stabilised (LPS) knee prosthesis (Zimmer Biomet, Warsaw, IN, USA). METHODS: Between 1996 and 2001, 197 primary NexGen LPS total knee arthroplasties (TKAs) were implanted by a single surgeon; 132 prostheses in 124 patients with a minimum follow-up of 15 years were included in the study...
March 22, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28326414/minimum-5-year-follow-up-results-and-functional-outcome-of-rotating-platform-high-flexion-total-knee-arthroplasty-a-prospective-study-of-701-knees
#8
Sanjeev Jain, Aditya C Pathak, K Kalaivanan
BACKGROUND: To evaluate the midterm clinical outcome, functional outcome, associated complications, and survivorship of high-flexion posterior-stabilized rotating-platform total knee arthroplasty. METHODS: We prospectively analyzed 701 knees in 501 patients, who underwent total knee arthroplasty using high-flexion posterior-stabilized rotating-platform prosthesis. Patients were assessed preoperatively and postoperatively for their ability to kneel, do full squats, do half squats, and sit cross-legged by using a patient-administered questionnaire...
September 2016: Arthroplast Today
https://www.readbyqxmd.com/read/28326209/neisseria-meningitidis-infecting-a-prosthetic-knee-joint-a-new-case-of-an-unusual-disease
#9
Berta Becerril Carral, Elvira Alarcón Manoja, Salvador López Cárdenas, Jesús Canueto Quintero
Primary meningococcal meningitis is an infrequent but known disease. However, the infection of a prosthetic joint with Neisseria meningitidis is rare. We hereby describe the second case of an arthroplasty infected with Neisseria meningitidis that responded favourably to prosthesis retention with surgical debridement, in combination with antibiotics treatment.
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28322115/lower-extremity-kinematics-of-curve-sprinting-displayed-by-runners-using-a-transtibial-prosthesis
#10
Yumeng Li, Kathy J Simpson, Lee Nolan, Marilyn Miller, Benjamin Johnson
The purpose of the study was to determine if the kinematics exhibited by skilled runners wearing a unilateral, transtibial prosthesis during the curve section of a 200-m sprint race were influenced by interaction of limb-type (prosthetic limb (PROS-L) vs. nonprosthetic limb (NONPROS-L)) and curve-side (inside and outside limb relative to the centre of the curve). Step kinematics, toe clearance and knee and hip flexion/extension, hip ab/adduction for one stride of each limb were generated from video of 13 males running the curve during an international 200 m transtibial-classified competition...
March 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28321330/ct-venography-after-knee-replacement-surgery-comparison-of-dual-energy-ct-based-monochromatic-imaging-and-single-energy-metal-artifact-reduction-techniques-on-a-320-row-ct-scanner
#11
Masafumi Kidoh, Daisuke Utsunomiya, Seitaro Oda, Takeshi Nakaura, Yoshinori Funama, Hideaki Yuki, Kenichiro Hirata, Masahiro Hatemura, Tomohiro Namimoto, Yasuyuki Yamashita
BACKGROUND: An optimal metal artifact reduction (MAR) technique is needed for a reliable and accurate image-based diagnosis. PURPOSE: Using a 320-row scanner, we compared the dual-energy computed tomography (CT)-based monochromatic and the single-energy metal artifact reduction (SEMAR) techniques for CT venography (CTV) to identify the better imaging method for diagnosing deep vein thrombosis (DVT) in patients who had undergone knee replacement surgery. MATERIAL AND METHODS: Twenty-three consecutive patients with suspected DVT after unilateral knee replacement surgery underwent dual-energy CT (135/80 kVp)...
February 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28318387/a-qualitative-study-of-the-challenges-of-providing-pre-prosthetic-rehabilitation-in-rural-south-africa
#12
Liezel Ennion, Anton Johannesson Johannesson
BACKGROUND: There is a known shortage of rehabilitation staff in rural settings and a sharp increase in the number of lower limb amputations being performed. A lack of adequate pre-prosthetic rehabilitation will result in worse physical and psychological outcomes for a person with a lower limb amputation, and they will not be eligible to be fitted with a prosthesis. OBJECTIVE: To explore therapists' experiences with providing pre-prosthetic rehabilitation in a rural setting...
March 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28314214/gait-biomechanics-following-lower-extremity-trauma-amputation-vs-reconstruction
#13
Elizabeth Russell Esposito, Daniel J Stinner, John R Fergason, Jason M Wilken
BACKGROUND: Surgical advances have substantially improved outcomes for individuals sustaining traumatic lower extremity injury. Injuries once requiring lower limb amputation are now routinely managed with limb reconstruction surgery. However, comparisons of functional outcomes between the procedures are inconclusive. PURPOSE: To compare gait biomechanics after lower limb reconstruction and transtibial amputation. METHODS: Twenty-four individuals with unilateral lower limb reconstruction wearing a custom ankle-foot orthosis (Intrepid Dynamic Exoskeletal Orthosis), 24 with unilateral, transtibial amputation, and 24 able-bodied control subjects underwent gait analysis at a standardized Froude speed based on leg length...
February 21, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28302460/one-stage-exchange-arthroplasty-a-surgical-technique-update
#14
David A George, Fares S Haddad
BACKGROUND: Standard surgical treatment for a periprosthetic knee infection has been based on a staged surgical technique, in order to assure infection eradication prior to implantation of a new prosthesis. METHODS: In this article, we discuss our surgical technique in undertaking a single-stage exchange of a chronic knee periprosthetic infection. RESULTS: This technique, which is based on the fundamental principles of controlling infection, preventing recurrence, and restoring function, has been shown to deliver high success rates...
February 24, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28293922/highly-variable-femoral-morphology-in-osteoarthritic-chinese-are-prostheses-today-sufficiently-suitable
#15
Yunjie Zhang, Xiaofeng Wang, Zongming Wu, Qing Xia, Yunchao Shao
Background We aimed to retrospectively investigate the morphology of the resected surfaces of femurs in Chinese patients who underwent total knee arthroplasty (TKA) and to assess the suitability of contemporary femoral components. Methods Measurements on three-dimensional reconstruction after virtual bone cutting were performed on 142 knees from Chinese TKA candidates. The anteroposterior (AP) and mediolateral (ML) dimensions, aspect ratio (ML/AP), and posterior condylar angle (PCA) were measured in the axial plane; the height and length of medial and lateral anterior condyles and the maximal width of the anterior condyles were measured in the frontal plane...
March 14, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28287044/no-effect-of-teriparatide-on-migration-in-total-knee-replacement
#16
Håkan Ledin, Lars Good, Torsten Johansson, Per Aspenberg
Background and purpose - Aseptic loosening is a main cause of late revision in total knee replacement (TKR). Teriparatide, a recombinant parathyroid hormone (PTH), stimulates osteoblasts and has been suggested to improve cancellous bone healing in humans. This might also be relevant for prosthesis fixation. We used radiostereometric analysis (RSA) to investigate whether teriparatide influences prosthesis fixation. Early migration as measured by RSA can predict future loosening. Patients and methods - In a randomized controlled trial with blind evaluation, 50 patients with osteoarthritis of the knee were allocated to a teriparatide treatment group (Forsteo, 20 μg daily for 2 months postoperatively) or to an untreated control group...
March 13, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28282797/relief-of-knee-flexion-contracture-and-gait-improvement-following-adaptive-training-for-an-assist-device-in-a-transtibial-amputee-a-case-study
#17
Sol-Bi Kim, Chang-Yong Ko, Jinho Son, Sungjae Kang, Jeicheong Ryu, Museong Mun
BACKGROUND: Management of a knee contracture is important for regaining gait ability in transtibial amputees. However, there has been little study of prosthesis training for enhancing mobility and improving range of motion in cases of restricted knee extension. OBJECTIVE: This study aimed to evaluate the effects of adaptive training for an assist device (ATAD) for a transtibial amputee with a knee flexion contracture (KFC). A male transtibial amputee with KFC performed 4 months of ATAD with a multidisciplinary team...
2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/28280845/-function-of-prosthesis-components-in-lower-limb-amputees-with-bone-anchored-percutaneous-implants-biomechanical-aspects
#18
S Blumentritt
BACKGROUND: Bone anchorage of an artificial limb has been proven to be an alternative intervention for amputees when prosthesis use is seriously reduced because of stump problems. Little is known about how prosthesis components interact with bone and joints and which potential the optimum use provides with respect to quality of treatment of leg amputees. OBJECTIVE: Does osseointegration influence the motor activity of residual limbs differently compared with socket prostheses? How should prosthesis components be aligned? What type of prosthetic knee joints should be preferred in transfemoral amputees? MATERIAL AND METHODS: Transfer of biomechanical knowledge of socket prosthetics to bone-anchored prostheses...
March 9, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28271089/total-knee-arthroplasty-in-severe-unstable-knee-case-report-and-literature-review
#19
Mohammad Naghi Tahmasebi, Gholamreza Ghorbani Amjad, Mohammad Hassan Kaseb, Kaveh Bashti
Multiplanar or global laxity in arthritic knee is rare, most of this patients have neuromuscular disorder (post poliomyelitis, spinal dystrophy) or history of knee trauma. Ligament insufficiency and severe bone loss is significant in this patient. The estimated prevalence for the concurrence of charcot marie-tooth (CMT) with myasthenia gravis (MG) suggests an extremely rare event. We have presented a 54-year-old female patient with CMT and MG complaining of progressive pain, swelling, and crepitation of the knee joints who had been undergone total knee arthroplasty (TKA) with rotating hinge prosthesis...
January 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/28269411/preliminary-results-for-an-adaptive-pattern-recognition-system-for-novel-users-using-a-powered-lower-limb-prosthesis
#20
John A Spanias, Ann M Simon, Eric J Perreault, Levi J Hargrove
Powered prosthetic legs are capable of improving the gait of lower limb amputees. Pattern recognition systems for these devices allow amputees to transition between different locomotion modes in a way that is seamless and transparent to the user. However, the potential of these systems is diminished because they require large amounts of training data that is burdensome to collect. To reduce the effort required to acquire these data, we developed an adaptive pattern recognition system that automatically learns from subject-specific data as the user is ambulating...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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