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William M Mihalko, Julie Lowell, Genymphas Higgs, Steven Kurtz
Post-cam designs for posterior-stabilized total knee arthroplasy (TKA) implants have evolved over the last 2 decades. These designs have evolved from symmetric post and cam to asymmetric designs that include anterior post interactions to affect a kinematic change in full extension. All design changes have consequences on the resulting femorotibial contact kinematics and, depending on the amount of constraint built into the design, these changes may have significant consequences on the wear patterns on the tibial polyethylene insert...
May 2016: Orthopedics
Xiao-bo Feng, Cao Yang, De-hao Fu, Shu-nan Ye, Xian-zhe Liu, Zhe Chen, Saroj Rai, Shu-hua Yang
This study aimed to examine the clinical and radiographic outcomes of primary total knee arthroplasy (TKA) with use of NexGen® Legacy® Constrained Condylar Knee (CCK) prosthesis for severe knee deformity. Clinical data of 46 patients (48 knees in total, aged 61 years on average) with severe knee deformity who underwent TKA with NexGen® Legacy® CCK prosthesis between December 2007 and February 2012 were retrospectively analyzed. There were 34 knees with severe valgus with incompetent medial collateral ligament, 11 knees with severe flexion contracture with inability to achieve knee balancing in flexion and extension by posterior soft tissue release, 2 knees with Charcot arthritis with severe varus and bone loss, and 1 with traumatic osteoarthritis with severe varus and ligamentous instability...
April 2016: Journal of Huazhong University of Science and Technology. Medical Sciences
Luke Harmer, Thomas Throckmorton, John W Sperling
Each generation of total shoulder arthroplasy has improved on the previous. The newest humeral component innovation is shortening the humeral component or eliminating the stem entirely to rely on stemless fixation in the humeral metaphysis. This offers theoretical advantages of preserved bone stock, less stress shielding, eliminating the diaphyseal stress riser, ease of stem removal at revision, and humeral head placement independent from the humeral shaft axis. There are a number of short term cohorts that have shown low complication rates and outcomes similar to previous generations of stemmed humeral components...
March 2016: Current Reviews in Musculoskeletal Medicine
F Dobarganes-Barlow, E Otero-Cámara, S Romero-Vargas, J Pérez-Frías, J Negrete-Corona
BACKGOUND: Gonarthrosis is a degenerative condition that importantly limits an individua's performance. Surgical treatment is used in patients with important functional limitation and severe pain. Knee arthroplasty is one of the surgeries with the best functional results in patients with this condition. However, its limitations include the risk of heavy bleeding and the resulting need for blood transfusion. The objective of this study was to assess the need for blood transfusion in patients undergoing knee arthroplasy in whom the cell saver was used postoperatively and find out the cost differences between the cell saver and standard blood transfusion...
July 2014: Acta Ortopédica Mexicana
Aikeremujiang Muheremu, Xiaohui Niu, Zhongyan Wu, Yilixiati Muhanmode, Wei Tian
BACKGROUND: Anterior cervical discectomy and fusion (ACDF) has been used as a gold standard for the treatment of cervical spondylosis, but it may cause complications such as pseudarthrosis and junctional degeneration. Cervical disk arthroplasty (CDA) may help overcome such problems, but there are inconsistencies among the published literature on its effectiveness comparing with ACDF. METHODOLOGY: We searched "PubMed" (2000.1-2013.10), "Medline" (2000.1-2013.10), "Elsevier" (2000...
July 2015: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Chen Chen, Xie-Yuan Jiang, Mao-Qi Gong
Total elbow arthroplasty was initially used to manage the rheumatoid arthritis of elbow. With the developement of technology in recent decades, the indication of total elbow arthroplasty include the trauma associated unstable joint, traumatic arthritis and distal humerus fractures in elderly. But the high risk of complications, which includes infection, ulnar nerve deficit and tricep insufficiency, is still an unsolved issue. The most widely used approach nowadays is the Bryan-Morrey approach, while some authors also report triceps on approach recently...
January 2014: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Plamen Kinov, Panayot P Tanchev, Martin Ellis, Gershon Volpin
The risk of venous thromboembolism following major orthopaedic procedures, such as joint arthroplasty and hip fracture surgery, are well recognised and represent one of the major challenges in orthopaedic practice, having in mind the increasing number of arthroplasties of the hip and knee done worldwide per year and their successful outcome. This potentially fatal complication remains a challenge in orthopaedic practice. The percentage of patients in whom antithrombotic prophylaxis has not been administrated or has been inadequate may reach 50%...
January 2014: International Orthopaedics
L Kadic, E Niesten, I Heijnen, F Hofmans, O Wilder-Smith, J J Driessen, M C de Waal Malefijt
Pain reduction is important for early mobilization after total knee arthroplasy. Recent studies show that local infiltration analgesia and addition of anti-hyperalgesic drugs (pregabalin and s-ketamine) may improve postoperative analgesia and mobilization. This pilot study was meant to evaluate if this new method of analgesia might improve patients' ability to exercise in the first postoperative days. The secondary goal was to determine what side effects could be expected by using this drug combination. A pilot study showed that patients achieved knee flexion of 88...
2012: Acta Anaesthesiologica Belgica
Per Wretenberg
This case report describes a patient who had a metal-on-metal hip prosthesis implanted 37 years ago. The hip function and X-ray are presented. The levels of cobalt and chromium ions in blood are analyzed and found to be about 40 times higher than normal. Consequences are discussed.
July 2008: Medical Devices: Evidence and Research
Kashif Abbas, Pervaiz Hashmi, Hasnain Raza
Carpometacarpal (CMC) joint of the thumb is the second most common site afflicted by osteoarthritis. Non surgical measures forms the first line of treatment with aim of preventing progression of disease, however, surgery becomes an option when symptoms are refractory to nonsurgical methods. Different procedures have been described in literature. Ligament reconstruction with tendon interposition (LRTI) is the most commonly performed procedure in North America for this problem. The Aim of study was to evaluate early results of ligament reconstruction and tendon interposition for CMC joint arthritis...
April 2012: JPMA. the Journal of the Pakistan Medical Association
Jian-ning Zhao, Ni-rong Bao
No abstract text is available yet for this article.
June 2011: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Yu-Liang Liu, Kun-Jhih Lin, Chang-Hung Huang, Wen-Chuan Chen, Chih-Hui Chen, Tsung-Wei Chang, Yu-Shu Lai, Cheng-Kung Cheng
BACKGROUNDS: Deficiencies in contemporary posterior crucitate retaining knee included inadequate femoral rollback and insufficient tibial rotation. Current study attempted to restore normal femoral rollback and tibial rotation to facilitate in knee flexion/extension and to achieve appropriate posture at deep knee bending after total knee arthroplasy by mimicking the morphology of convexly lateral tibial plateau of intact knee. METHODS: Computational simulation was utilized to analyze motion of three-dimensional knee models, including intact, traditionally symmetrical posterior crucitate retaining and newly anatomic-like posterior crucitate retaining knees...
July 2011: Clinical Biomechanics
Koichiro Hayata, Katsuaki Kanbe, Junji Chiba, Atsushi Nakamura, Yasuo Inoue, Kaori Hobo
AIMS: To determine what clinical factors relating to efficacy besides complications of orthopedic surgery for patients treated with anti-tumor necrosis factor (TNF)-α therapy (infliximab), we analyzed the clinical data of 52 cases of orthopedic surgery, such as total hip arthroplasy (THA), total knee arthroplasty (TKA), total shoulder arthroplasy (TSA), total elbow arthroplasty (TEA), arthroscopic synovectomy, foot arthroplasty, spine surgery, hand surgery and fracture. METHODS: We analyzed clinical factors including age, disease duration, preoperative C-reactive protein (CRP), disease activity score (DAS)-28, matrix metalloproteinase (MMP)-3, and rheumatoid arthritis particle-agglutination (RAPA) in 52 cases of rheumatoid arthritis (RA) undergoing orthopedic surgery...
February 2011: International Journal of Rheumatic Diseases
Mirosław Jabłoński, Mieczysław Gorzelak, Karolina Turzańska, Stanisław Pojasek, Dorota Majchrzak, Ryszard Pluta
Our study aimed at analysis and presentation of intraoperative complications during total hip replacements with the use of limited posterior approach according to T.V. Swanson. Consecutive 210 hip arthroplasies (79 males, 131 females, aged 20-87 years, mean age 61 +/- 12,) were analyzed according to intraoperative complications. Left hip was operated in 117 cases, right in 93, bilateral procedure was performed in 27 cases (9 men, 18 women). Idiopathic disease occurred in 196 hips, 8 were result of rheumatoid arthritis, in 5 was of dysplastic origin and one occurred due to idiopathic necrosis of femoral head...
January 2009: Chirurgia Narzadów Ruchu i Ortopedia Polska
G A Afolaranmi, J Tettey, R M D Meek, M H Grant
Many orthopaedic implants are composed of alloys containing chromium. Of particular relevance is the increasing number of Cobalt Chromium bearing arthroplasies being inserted into young patients with osteoarthritis. Such implants will release chromium ions. These patients will be exposed to the released chromium for over 50 years in some cases. The subsequent chromium ion metabolism and redistribution in fluid and tissue compartments is complex. In addition, the potential biological effects of chromium are also controversial, including DNA and chromosomal damage, reduction in CD8 lymphocyte levels and possible hypersensitivity reactions (ALVAL)...
2008: Open Orthopaedics Journal
Jie Ae Kim, Hyun Joo Ahn
PURPOSE: Hypobaric local anesthetics for total hip replacement (THR) have potential advantages related to body position and differential block. However, the dose requirements of hypobaric local anesthetics for THR have not been clearly established. Therefore, we undertook a dose-response study of hypobaric tetracaine for THR. METHODS: In a randomized, controlled, and double-blinded manner, three groups of 20 patients each undergoing THR received spinal anesthesia using either 10, 12, or 14 mg of 0...
November 2005: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
L A Lim, R T Trousdale, D J Berry, A D Hanssen
We report 5 cases of failure of the stem condyle junction of a modular femoral stem in revision total knee arthroplasy.
January 2001: Journal of Arthroplasty
P J Jebson, W F Blair
Two young male laborers had a corrective intra-articular osteotomy for a symptomatic malunited Bennett's fracture. Follow-up examination at 24 and 40 months, both patients experienced dramatic pain relief and improved thumb range of motion, and grip, and pinch strengths. A corrective intraarticular osteotomy is an acceptable alternative to arthrodesis or arthroplasy in select patients with a malunited Bennett's fracture.
May 1997: Journal of Hand Surgery
A Montella, A Manunta, E Espa, G Gasparini, E De Santis, M Gulisano
The present research has been carried out with the aim of contributing to the understanding of morphological changes in human articular cartilage during osteoarthrosis and to evaluate the usefulness of TEM in this application. Only the matrix was examined in this first phase of study. Fragments from the femoral head of 20 patients subjected total hip arthroplasis, were studied by TEM after treatment with current procedures. The images obtained were considered observing the division of cartilage into superficial, intermediate and deep layers...
January 1992: Italian Journal of Anatomy and Embryology, Archivio Italiano di Anatomia Ed Embriologia
J T Møller, N Hedemand
No abstract text is available yet for this article.
April 3, 1978: Ugeskrift for Laeger
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