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Unicondylar knee arthroplasty

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https://www.readbyqxmd.com/read/28522245/pin-site-complications-associated-with-computer-assisted-navigation-in-hip-and-knee-arthroplasty
#1
Eli Kamara, Zachary P Berliner, Matthew S Hepinstall, H John Cooper
BACKGROUND: There has been a great increase in the use of navigation technology in joint arthroplasty. In most types of navigation-assisted surgery, several temporary navigation pins are placed in the patient. Goals of this study are (1) to identify complications and (2) risk factors associated with placement of these pins. METHODS: This is a retrospective cohort study of all navigation-assisted hip and knee arthroplasty performed a single institution over a 3-year period...
April 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28360489/unicondylar-knee-arthroplasty-key-concepts
#2
REVIEW
Mohamad J Halawi, Wael K Barsoum
The concept of unicondylar knee arthroplasty (UKA) has been described as early as 1950s following the introduction of the MacIntosh and McKeever hemiarthroplasty. With improvements in implant design, patient selection, and surgical technique, there has been an increase in utilization of UKA as a less-invasive alternative to total joint arthroplasty for the treatment of localized symptomatic osteoarthritis. The purpose of this review article is to highlight five trending concepts in UKA based on current evidence: bearing design, fixation technique, medial vs...
January 2017: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28251284/the-pertinent-question-in-treatment-of-unicompartmental-osteoarthritis-of-the-knee-high-tibial-osteotomy-or-unicondylar-knee-arthroplasty-or-total-knee-arthroplasty
#3
EDITORIAL
Roland Becker, Michael Hirschmann
No abstract text is available yet for this article.
March 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28160030/-fixed-bearing-unicondylar-arthroplasty-in-medial-osteoarthritis-of-the-knee
#4
R Becker, C Paech, A Denecke
OBJECTIVE: The unicondylar prosthesis replaces the medial femerotibial compartment only, the part presenting with osteoarthritic changes. The remaining compartments of the knee present less osteoarthritic changes and thus can be preserved. INDICATIONS: Osteoarthritis of the medial femorotibial compartment is the ideal indication for unicondylar arthroplasty. The knee should show an intraarticular deformity, which means the malalignment is caused by the osteoarthritic changes of the medial compartment...
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28078394/kinematics-of-a-bicruciate-retaining-total-knee-arthroplasty
#5
Thomas J Heyse, Joshua Slane, Geert Peersman, Margo Dirckx, Arne van de Vyver, Philipp Dworschak, Susanne Fuchs-Winkelmann, Lennart Scheys
PURPOSE: The recently reintroduced bicruciate-retaining Total Knee Arthroplasty (BCR TKA) is an interesting approach in the quest for close replication of knee joint biomechanics and kinematics closer to the native knee. Therefore, this study aimed at providing a detailed biomechanical view on the functional resemblance of BCR TKA to the native knee joint. METHODS: Seven fresh-frozen full leg cadaver specimens (76 ± 10 year) were mounted in a 6 degrees-of-freedom kinematic rig that applied a dynamic squatting motion knee flexion...
January 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28065624/outcome-of-unicondylar-knee-arthroplasty-vs-total-knee-arthroplasty-for-early-medial-compartment-arthritis-a-randomized-study
#6
Vikas Kulshrestha, Barun Datta, Santhosh Kumar, Gaurav Mittal
BACKGROUND: With increasing number of patients with early osteoarthritis of knee opting for total knee arthroplasty (TKA), there has been increase in patients dissatisfied with surgical outcomes. It is being presumed that offering unicondylar knee arthroplasty (UKA) to them would improve outcomes. METHODS: Primary objective of our study was to look for any difference in patient-reported outcome and function at 2-year follow-up in patients undergoing UKA as compared to TKA...
December 23, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27998659/radiographic-imaging-in-the-postanesthesia-care-unit-is-unnecessary-after-partial-knee-arthroplasty
#7
Andrew S Longenecker, Gregory S Kazarian, Giovanni P Boyer, Jess H Lonner
BACKGROUND: Obtaining routine radiographs in the postanesthesia care unit (PACU) after primary uncomplicated partial knee arthroplasty (PKA) is a common practice with unclear utility. The objective of this study is to determine the rate at which immediate postoperative radiographs identify an actionable problem after primary uncomplicated PKA and to determine the potential cost savings associated with foregoing the routine acquisition of these radiographs. METHODS: This was a retrospective review that assessed a consecutive series of 1366 primary uncomplicated PKAs (including 873 unicondylar knee arthroplasties, 313 patellofemoral arthroplasties, and 180 bicompartmental knee arthroplasties) performed between January 2008 and March 2016...
November 27, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27984831/-total-joint-replacement-and-return-to-sports
#8
N Oehler, T Schmidt, A Niemeier
Background: An increasing number of physically active patients not only need to know if they will basically be able to engage in sports after undergoing arthroplasty. They also would like to know whether or not they will be able to resume their preoperative activity levels. This article aims to provide an overview of recent data regarding the following questions on hip, knee and shoulder arthroplasty: (1) What is the impact of physical activity on an endoprosthesis? (2) What level of sports can be achieved after an arthroplasty procedure? (3) What types of sport are recommended for patients with an endoprosthesis? Methods: PubMed-based review of the literature...
December 2016: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/27957592/-lateral-unicompartmental-knee-arthroplasty-a-challenge
#9
T Walker, P R Aldinger, M R Streit, T Gotterbarm
OBJECTIVE: Joint surface replacement in the lateral compartment by unicondylar knee arthroplasty. INDICATIONS: Lateral unicompartmental osteoarthritis of the knee joint, avascular necrosis of the lateral femoral condyle. CONTRAINDICATIONS: Full thickness cartilage defect in the central part of the medial compartment or in the medial aspect of the patellofemoral joint. Instability/contracture of cruciate and collateral ligaments, valgus deformity >15°, valgus deformity not passively correctable, flexion deformity >15°, an intraoperative flexion <100°, failed upper tibial osteotomy, rheumatoid arthritis...
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/27869619/five-year-survival-of-20-946-unicondylar-knee-replacements-and-patient-risk-factors-for-failure-an-analysis-of-german-insurance-data
#10
Elke Jeschke, Thorsten Gehrke, Christian Günster, Joachim Hassenpflug, Jürgen Malzahn, Fritz Uwe Niethard, Peter Schräder, Josef Zacher, Andreas Halder
BACKGROUND: Improvements in implant design and surgical technique of unicondylar knee arthroplasty have led to reduced revision rates, but patient selection seems to be crucial for success of such arthroplasties. The purpose of the present study was to analyze the 5-year implant survival rate of unicondylar knee replacements in Germany and to identify patient factors associated with an increased risk of revision, including >30 comorbid conditions. METHODS: Using nationwide billing data of the largest German health-care insurance for inpatient hospital treatment, we identified patients who underwent unicondylar knee arthroplasty between 2006 and 2012...
October 19, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27868008/robotic-unicondylar-knee-arthroplasty-a-commentary-on-a-recently-published-level-1-study
#11
COMMENT
Alexander H Jinnah, Ashley Multani, Riyaz H Jinnah, Johannes F Plate
No abstract text is available yet for this article.
October 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27760695/effect-of-lavage-and-brush-preparation-on-cement-penetration-and-primary-stability-in-tibial-unicompartmental-total-knee-arthroplasty-an-experimental-cadaver-study
#12
Christian Scheele, Matthias F Pietschmann, Christian Schröder, Thomas Grupp, Melanie Holderied, Volmar Jansson, Peter E Müller
BACKGROUND: Unicompartmental total knee arthroplasty (UKA) is a well-established treatment option for unicondylar osteoarthritis, and generally leads to better functional results than tricompartimental total knee arthroplasty (TKA). However, revision rates of UKAs are reported as being higher; a major reason for this is aseptic loosening of the tibial component due to implant-cement-bone interface fatigue. The objective of this study was to determine the effects of trabecular bone preparation, prior to implantation of tibial UKAs, on morphological and biomechanical outcomes in a cadaver study...
October 16, 2016: Knee
https://www.readbyqxmd.com/read/27704318/what-differences-in-morphologic-features-of-the-knee-exist-among-patients-of-various-races-a-systematic-review
#13
REVIEW
T K Kim, Mark Phillips, Mohit Bhandari, John Watson, Rajesh Malhotra
BACKGROUND: Most TKA prostheses are designed based on the anatomy of white patients. Individual studies have identified key anthropometric differences between the knees of the white population and other major ethnic groups, yet there is limited understanding of what these findings may indicate if analyzed collectively. QUESTION/PURPOSE: What are the differences in morphologic features of the distal femur and proximal tibia among and within various ethnicities? METHODS: A systematic review of the PubMed database and a hand-search of article bibliographies identified 235 potentially eligible English-language studies...
January 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27680750/computerised-navigation-of-unicondylar-knee-prostheses-from-primary-implantation-to-revision-to-total-knee-arthroplasty
#14
Dominique Saragaglia, Benoit Marques Da Silva, Pierrick Dijoux, Jérémy Cognault, Julia Gaillot, Régis Pailhé
AIM: Computerized navigation of unicondylar knee arthroplasties (UKA) is not a widespread technique. The lifespan of a UKA depends on the quality of its implantation. We know that overcorrection leads to a rapid extension of the osteoarthritis to the opposite side of the knee and undercorrection to a rapid loosening or wear of the prosthesis. Because of these difficulties and following a long experience with navigation of total knee arthroplasties (TKA) and osteotomies around the knee, we began using navigation for revisions to TKA in 2003 and for UKAs in 2008...
September 28, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27597426/preoperative-patient-recorded-outcome-measures-predict-patient-discharge-location-following-unicondylar-knee-arthroplasty
#15
Alfonso E Ayala, Kevin A Lawson, Angelika C Gruessner, Michael P Dohm
BACKGROUND: Advantages of unicondylar knee arthroplasty (UKA) over total knee arthroplasty include rapid recovery and shorter lengths of stay following surgery. Patients requiring extended postoperative care fail to recognize these benefits. Patient-reported outcome measures have proved useful in predicting outcomes following joint arthroplasty. The purpose of this study was to identify and report preoperative patient-reported outcome measures and clinical variables that predict discharge to skilled nursing facilities following UKA...
August 10, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27492606/expectations-of-younger-patients-concerning-activities-after-knee-arthroplasty-are-we-asking-the-right-questions
#16
Suzanne Witjes, Rutger C I van Geenen, Koen L M Koenraadt, Cor P van der Hart, Leendert Blankevoort, Gino M M J Kerkhoffs, P Paul F M Kuijer
PURPOSE: Indications for total and unicondylar knee arthroplasty (KA) have expanded to younger patients, in which Patient-Reported Outcome Measures (PROMs) often show ceiling effects. This might be due to higher expectations. Our aims were to explore expectations of younger patients concerning activities in daily life, work and leisure time after KA and to assess to what extent PROMs meet and evaluate these activities of importance. METHODS: Focus groups were performed among osteoarthritis (OA) patients <65 years awaiting KA, in which they indicated what activities they expected to perform better in daily life, work and leisure time after KA...
February 2017: Quality of Life Research
https://www.readbyqxmd.com/read/27436195/cementless-fixation-in-medial-unicompartmental-knee-arthroplasty-a-systematic-review
#17
S Campi, H G Pandit, C A F Dodd, D W Murray
PURPOSE: The aim of this study was to evaluate clinical outcome, failures, implant survival, and complications encountered with cementless fixation in unicompartmental knee arthroplasty (UKA). METHODS: A systematic review of the literature on cementless fixation in UKA was performed according to the PRISMA guidelines. The following database was comprehensively searched: PubMed, Cochrane, Medline, CINAHL, Embase, and Google Scholar. The keywords "unicompartmental", "unicondylar", "partial knee arthroplasty", and "UKA" were combined with each of the keyword "uncemented", "cementless" and "survival", "complications", and "outcome"...
July 19, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27436194/balancing-mobile-bearing-unicondylar-knee-arthroplasty-in-vitro
#18
Thomas J Heyse, Joshua Slane, Geert Peersman, Philipp Dworschak, Susanne Fuchs-Winkelmann, Lennart Scheys
PURPOSE: Balancing mobile-bearing (MB) unicondylar knee arthroplasty (UKA) is challenging. If performed improperly, potential complications include pain, implant loosening, or progression of osteoarthritis in the preserved compartment. The purpose of this study was to document effects of improper balancing on knee kinematics and joint contact stress. It was hypothesized that over-stuffing would lead to more valgus and higher lateral contact force. METHODS: Seven fresh-frozen cadaver legs were mounted in a kinematic rig that applied three motion patterns to the specimens: passive flexion-extension, open chain extension, and squatting...
July 19, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27269236/the-use-of-unicondylar-cement-spacers-as-a-bone-preserving-measure-in-two-stage-revision-knee-arthroplasty
#19
P Reynolds, S M Blake
No abstract text is available yet for this article.
November 2016: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/27049194/the-difficult-primary-total-knee-arthroplasty
#20
Arthur L Malkani, Kirby D Hitt, Sameer Badarudeen, Courtland Lewis, Jeffrey Cherian, Randa Elmallah, Michael A Mont
Primary total knee arthroplasty (TKA) for the treatment of knee arthritis has substantially increased over the past decade. Because of its success, the indications for primary TKA have expanded to include younger patients who are more active, elderly patients who have multiple comorbidities, and patients who have more complex issues, such as posttraumatic arthritis and severe deformity. TKA also has been used to salvage failed unicondylar arthroplasty and osteotomies about the knee. Exposure may be challenging and outcomes may not be as successful in patients with soft-tissue contractures, such as a stiff knee, who undergo TKA...
2016: Instructional Course Lectures
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