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https://www.readbyqxmd.com/read/27909665/autologous-osteophyte-grafting-for-open-wedge-high-tibial-osteotomy
#1
Takenori Akiyama, Ken Okazaki, Taro Mawatari, Satoshi Ikemura, Shunsuke Nakamura
Osteophytes are physiological bony outgrowths that develop at the margins of the articular surfaces during the progression of osteoarthritis; they are associated with active endochondral bone formation processes and expressions of various growth factors. We believe they could be a source of bone grafts as a result of a potentially strong osteoinductive effect. Moreover, osteophytes can be easily harvested by arthroscopy in patients undergoing open-wedge high tibial osteotomy (OW-HTO) for medial unicompartmental knee osteoarthritis...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27909123/comparative-study-of-computer-assisted-total-knee-arthroplasty-after-opening-wedge-osteotomy-versus-after-unicompartmental-arthroplasty
#2
R Pailhé, J Cognault, J Massfelder, A Sharma, R-C Rouchy, B Rubens-Duval, D Saragaglia
AIMS: The role of high tibial osteotomy (HTO) is being questioned by the use of unicompartmental knee arthroplasty (UKA) in the treatment of medial compartment femorotibial osteoarthritis. Our aim was to compare the outcomes of revision HTO or UKA to a total knee arthroplasty (TKA) using computer-assisted surgery in matched groups of patients. PATIENTS AND METHODS: We conducted a retrospective study to compare the clinical and radiological outcome of patients who underwent revision of a HTO to a TKA (group 1) with those who underwent revision of a medial UKA to a TKA (group 2)...
December 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27904720/clinical-results-of-lateral-unicompartmental-knee-arthroplasty-minimum-2-year-follow-up
#3
Kyung Tae Kim, Song Lee, Jeehyoung Kim, Jin Woo Kim, Min Su Kang
BACKGROUND: We investigated the clinical results and early complications after lateral unicompartmental knee arthroplasty (UKA) using the Zimmer unicompartmental high-flex knee (ZUK) prosthesis with a minimum follow-up of 2 years. METHODS: Twenty-seven patients (30 cases) who underwent lateral UKA with the ZUK prosthesis between January 2011 and February 2014 were selected for this study. The mean age of the patients was 63.3 years at the time of surgery, and the mean followup was 3 years and 2 months (range, 24 to 48 months)...
December 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/27900474/bone-scan-usefulness-in-patients-with-painful-hip-or-knee-prosthesis-10-situations-that-can-cause-pain-other-than-loosening-and-infection
#4
REVIEW
Sofia Vaz, Teresa C Ferreira, Lucília Salgado, Frédéric Paycha
In recent years, with the higher median life expectancy, the number of hip and knee replacements has increased. Clinical examination and morphological studies are essential to evaluate patients with a painful arthroplasty. Nuclear medicine examinations also play an important role, their main usefulness being the exclusion of prosthesis complications. Nevertheless, conventional examinations, namely bone scan and white blood cell scintigraphy, can also identify complications, such as loosening and infection. This study describes the normal and pathologic patterns of a bone scan and exemplifies ten common situations that can cause pain in patients with hip or knee arthroplasty, other than loosening and infection, which can be disclosed on a bone scintigraphy...
November 30, 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/27891054/patellofemoral-joint-arthroplasty-our-experience-in-isolated-patellofemoral-and-bicompartmental-arthritic-knees
#5
L Sabatini, M Schirò, F Atzori, G Ferrero, A Massè
INTRODUCTION: Isolated patellofemoral (PF) arthritis is rare, and there is no complete agreement about the best surgical treatment. The operative treatments are total knee arthroplasty and patellofemoral replacement (PFR). The incidence of many early complications of PF arthroplasty has decreased with the introduction of newer designs. Nowadays, the main cause of revision surgery is the progression of tibiofemoral osteoarthritis. In the past, PF arthroplasty was contraindicated in patients with evidence of osteoarthritis or pain in medial or lateral tibiofemoral compartments...
2016: Clinical Medicine Insights. Arthritis and Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27847841/unicompartmental-knee-osteoarthritis-ukoa-unicompartmental-knee-arthroplasty-uka-or-high-tibial-osteotomy-hto
#6
REVIEW
E Carlos Rodriguez-Merchan
The aim of this review article is to analyze the results of high tibial osteotomy compared to unicompartmental knee arthroplasty in patients with unicompartmental knee osteoarthritis. The search engine used was PubMed. The keywords were: "high tibial osteotomy versus unicompartmental knee arthroplasty". Twenty-one articles were found on 28 February 2015, but only eighteen were selected and reviewed because they strictly focused on the topic. In a meta-analysis the ratio for an excellent outcome was higher in unicompartmental knee arthroplasty than high tibial osteotomy and the risks of revision and complications were lower in the former...
October 2016: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/27836579/valgus-stress-radiographs-predict-lateral-compartment-cartilage-thickness-but-not-cartilage-degeneration-in-varus-osteoarthritis
#7
Wenzel Waldstein, Tom Schmidt-Braekling, Giorgio Perino, Maximilian F Kasparek, Reinhard Windhager, Friedrich Boettner
BACKGROUND: Intact cartilage in the lateral compartment is an important requirement for medial unicompartmental knee arthroplasty. This study sought to determine how measurements of joint space width in the lateral compartment on valgus stress radiographs compare to cartilage thickness as measured with a precise needle test, and whether cartilage thickness is a predictor of cartilage degeneration. METHODS: A consecutive series of 100 knees undergoing total knee arthroplasty for end-stage varus osteoarthritis was studied...
October 5, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27830485/lateral-compartment-osteophytes-are-not-associated-with-lateral-compartment-cartilage-degeneration-in-arthritic-varus-knees
#8
Wenzel Waldstein, Maximilian F Kasparek, Martin Faschingbauer, Reinhard Windhager, Friedrich Boettner
BACKGROUND: Progression of arthritis in the lateral compartment is one of the main failure modes of unicompartmental knee arthroplasty (UKA). The decision regarding whether to perform a medial UKA sometimes is made based on whether lateral-compartment osteophytes are visible on plain radiographs obtained before surgery, but it is not clear whether the presence of lateral-compartment osteophytes signifies that the cartilage in the lateral compartment is arthritic. QUESTIONS/PURPOSES: (1) Is the presence of lateral compartment osteophytes associated with biomechanical properties of lateral-compartment cartilage, and (2) are osteophytes in the lateral compartment associated with particular histologic features of cartilage in the lateral compartment? METHODS: Between May 2010 and January 2012, we performed 201 TKAs for varus osteoarthritis confirmed on standardized AP hip-to-ankle standing radiographs...
November 9, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27810436/different-optimal-alignment-but-equivalent-functional-outcomes-in-medial-and-lateral-unicompartmental-knee-arthroplasty
#9
Jelle P van der List, Harshvardhan Chawla, Jordan C Villa, Andrew D Pearle
INTRODUCTION: Several differences in kinematics, functional outcomes and alignment exist between medial and lateral unicompartmental knee arthroplasty (UKA). Therefore, the purpose of this study was (1) to compare functional outcomes between both procedures with the hypothesis that both have equivalent outcomes and (2) to assess the role of preoperative and postoperative alignment on functional outcomes in both procedures. METHODS: Patients who underwent UKA were included when overall function - using Western Ontario and McMaster Universities Arthritis (WOMAC) score - and joint awareness - using Forgotten Joint Score (FJS) - were available preoperatively and at minimum two-year follow-up...
October 31, 2016: Knee
https://www.readbyqxmd.com/read/27810433/a-cost-comparison-of-unicompartmental-and-total-knee-arthroplasty
#10
Sheila Shankar, Matthew W Tetreault, Briana J Jegier, Gunnar B Andersson, Craig J Della Valle
BACKGROUND: Unicompartmental knee arthroplasty (UKA) is an alternative to total knee arthroplasty (TKA) in appropriately selected patients. There is a paucity of data comparing hospital resource utilization and costs for UKA versus TKA. METHODS: We retrospectively reviewed 128 patients who underwent UKA or TKA for osteoarthritis by a single surgeon in the 2011 Fiscal Year. Sixty-four patients in each group were matched based on sex, age, race, body mass index, Charlson Comorbidity Index, and insurance type...
October 31, 2016: Knee
https://www.readbyqxmd.com/read/27810429/patients-with-isolated-lateral-osteoarthritis-unicompartmental-or-total-knee-arthroplasty
#11
J P van der List, H Chawla, H A Zuiderbaan, A D Pearle
BACKGROUND: Lateral unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA) are both reliable treatment options for patients with isolated lateral osteoarthritis (OA). However, studies comparing both procedures are scarce. Aims of this study were to (I) compare short-term functional outcomes following lateral UKA and TKA and (II) assess the role of patient characteristics on outcomes as measured by the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC)...
October 31, 2016: Knee
https://www.readbyqxmd.com/read/27794622/mobile-bearing-medial-unicompartmental-knee-arthroplasty-restores-limb-alignment-comparable-to-that-of-the-unaffected-contralateral-limb
#12
Arun B Mullaji, Siddharth Shah, Gautam M Shetty
Background and purpose - Medial unicompartmental knee arthroplasty (UKA) is undertaken in patients with a passively correctable varus deformity. We investigated whether restoration of natural soft tissue tension would result in a lower limb alignment similar to that of the contralateral unaffected lower limb after mobile-bearing medial UKA. Patients and methods - In this retrospective study, hip-knee-ankle (HKA) angle, position of the weight-bearing axis (WBA), and knee joint line obliquity (KJLO) after mobile-bearing medial UKA was compared with that of the unaffected (clinically and radiologically) contralateral lower limb in 123 patients...
October 31, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27789095/deep-venous-thrombosis-prophylaxis-after-unicompartmental-knee-arthroplasty-a-prospective-study-on-the-safety-of-aspirin
#13
Tom Schmidt-Braekling, Andrew D Pearle, David J Mayman, Geoffrey H Westrich, Wenzel Waldstein, Friedrich Boettner
BACKGROUND: Although venous thromboembolism is one of the leading causes of morbidity after knee arthroplasty, little data exist on the risk of deep venous thrombosis (DVT) after unicompartmental knee arthroplasty (UKA). METHODS: We prospectively enrolled 112 patients undergoing UKA to determine the incidence of DVT utilizing aspirin 325 mg twice a day (BID) for 4 weeks postoperatively as DVT prophylaxis. The data were compared with a recent randomized controlled trial of patients undergoing total knee arthroplasty utilizing aspirin and Lovenox in conjunction with pneumatic compression devices...
September 28, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27776793/how-accurately-does-high-tibial-osteotomy-correct-the-mechanical-axis-of-an-arthritic-varus-knee-a-systematic-review
#14
Maxim Van den Bempt, Wouter Van Genechten, Toon Claes, Steven Claes
BACKGROUND: The aim of this study was to give an overview of the accuracy of coronal limb alignment correction after high tibial osteotomy (HTO) for the arthritic varus knee by performing a systematic review of the literature. METHODS: The databases PubMed, MEDLINE and Cochrane Library were screened for relevant articles. Only prospective clinical studies with the accuracy of alignment correction by performing HTO as primary or secondary objective were included...
October 21, 2016: Knee
https://www.readbyqxmd.com/read/27761624/comparison-of-the-efficiency-of-an-extra-articular-absorber-system-and-high-tibial-osteotomy-for-unloading-the-medial-knee-compartment-an-in-vitro-study
#15
Gerrit Bode, Ferdinand Kloos, Matthias J Feucht, Benjamin Fleischer, Norbert Südkamp, Philipp Niemeyer, Christoph Becher
PURPOSE: The unloading effect of an extra-articular absorber system on the knee joint medial compartment was compared with high tibial osteotomy (HTO) under physiological conditions in vitro. METHODS: Seven fresh-frozen cadaveric knees were used to test isokinetic flexion-extension motions under physiological loading using a biomechanical knee simulator. Tibiofemoral area contact and peak contact pressures were measured using pressure-sensitive film in the untreated medial compartment...
October 19, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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
#16
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/27737301/modern-indications-results-and-global-trends-in-the-use-of-unicompartmental-knee-arthroplasty-and-high-tibial-osteotomy-in-the-treatment-of-isolated-medial-compartment-osteoarthritis
#17
Hendrik A Zuiderbaan, Jelle P van der List, Laura J Kleeblad, Pauline Appelboom, Nanne P Kort, Andrew D Pearle, Maarten V Rademakers
In this review, we evaluate the modern indications, subjective outcome scores, and survivorship results of unicompartmental knee arthroplasty (UKA) and high tibial osteotomy (HTO) in the treatment of isolated medial compartment degeneration of the knee. In addition, in a thorough review of the literature, we evaluate global trends in the use of both methods. In our evaluation of articles, we note that inclusion criteria are relatively broader for UKA than for HTO, where age and body mass index should be considered before HTO surgery in order to optimize clinical outcome and survivorship results...
September 2016: American Journal of Orthopedics
https://www.readbyqxmd.com/read/27703416/acl-damage-and-deficiency-is-associated-with-more-severe-preoperative-deformity-lower-range-of-motion-at-the-time-of-tka
#18
Michael E Berend, John B Meding, Robert A Malinzak, Philip M Faris, Michael D Jackson, Kenneth E Davis, Merrill A Ritter
BACKGROUND: ACL status varies in the arthritic knee during TKA. QUESTIONS/PURPOSES: The purpose of this study was to examine clinical features and intraoperative findings associated with stages of ACL degeneration. METHODS: Coronal deformity, ROM, intra-articular degenerative patterns, and ligament releases were assessed for 1656 knees during TKA. Common patterns of deformity and severity of degenerative change were assessed as a function of the severity of ACL deficiency...
October 2016: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/27695077/meta-review-of-the-quantity-and-quality-of-evidence-for-knee-arthroplasty-devices
#19
Anna R Gagliardi, Ariel Ducey, Pascale Lehoux, Sue Ross, Patricia Trbovich, Anthony Easty, Chaim Bell, Julie Takata, Christof Pabinger, David R Urbach
INTRODUCTION: Some cardiovascular devices are licensed based on limited evidence, potentially exposing patients to devices that are not safe or effective. Research is needed to ascertain if the same is true of other types of medical devices. Knee arthroplasty is a widely-used surgical procedure yet implant failures are not uncommon. The purpose of this study was to characterize available evidence on the safety and effectiveness of knee implants. METHODS: A review of primary studies included in health technology assessments (HTA) on total (TKA) and unicompartmental knee arthroplasty (UKA) was conducted...
2016: PloS One
https://www.readbyqxmd.com/read/27694515/ten-to-15-year-results-of-the-oxford-phase%C3%A2-iii-mobile-unicompartmental-knee-arthroplasty-a-prospective-study-from-a-non-designer-group
#20
L A Lisowski, L I Meijer, M P J van den Bekerom, P Pilot, A E Lisowski
AIMS: The interest in unicompartmental knee arthroplasty (UKA) for medial osteoarthritis has increased rapidly but the long-term follow-up of the Oxford UKAs has yet to be analysed in non-designer centres. We have examined our ten- to 15-year clinical and radiological follow-up data for the Oxford Phase III UKAs. PATIENTS AND METHODS: Between January 1999 and January 2005 a total of 138 consecutive Oxford Phase III arthroplasties were performed by a single surgeon in 129 patients for medial compartment osteoarthritis (71 right and 67 left knees, mean age 72...
October 2016: Bone & Joint Journal
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