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https://www.readbyqxmd.com/read/29033153/clinical-outcomes-and-survivorship-of-lateral-unicompartmental-knee-arthroplasty-does-surgical-approach-matter
#1
Tori A Edmiston, Gregory C Manista, P Maxwell Courtney, Scott M Sporer, Craig J Della Valle, Brett R Levine
BACKGROUND: Lateral unicompartmental knee arthroplasty (UKA) has been shown to be an effective procedure to treat isolated lateral compartment osteoarthritis with excellent long-term survivorship. Whether a medial parapatellar approach or a lateral parapatellar approach is superior in lateral UKA is unknown. The purpose of this study was to determine if there is a difference in intermediate-term clinical outcomes in patients undergoing lateral UKA through a lateral vs medial parapatellar approach...
September 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29030653/lateral-unicompartmental-knee-replacement-a-systematic-review-of-reasons-for-failure
#2
REVIEW
Lukas Ernstbrunner, Mohamed A Imam, Octavian Andronic, Tabea Perz, Karl Wieser, Sandro F Fucentese
PURPOSE: Currently, individual studies lack the power to successively illustrate different failure modes; therefore, we undertook a systematic review to examine lateral unicompartmental knee replacement (lat UKR) failure modes. Furthermore, we compared early with midterm and late failures and fixed-bearing with mobile-bearing implants. METHODS: A search using the databases of PubMed, EMBASE, Cochrane, and annual registries was performed to search for failed lat UKRs...
October 13, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28993855/postoperative-fixed-flexion-deformity-greater-than-10%C3%A2-lead-to-poorer-functional-outcome-10%C3%A2-years-after-unicompartmental-knee-arthroplasty
#3
Jared Ze Yang Yeh, Jerry Yongqiang Chen, Joel Wei-An Lim, Hee Nee Pang, Darren Keng Jin Tay, Shi-Lu Chia, Ngai Nung Lo, Seng Jin Yeo
PURPOSE: The primary aim of this study was to evaluate the influence of postoperative fixed flexion deformity (FFD) on the clinical outcomes 10 years after unicompartmental knee arthroplasty (UKA). The secondary aim was to identify predictors for the occurrence of postoperative FFD. METHODS: Patients who underwent UKA between 2003 and 2007 were prospectively followed up for 10 years. A total of 172 patients were categorized into 3 groups based on the amount of postoperative FFD: (1) 0° or less (Min-FFD), (2) 1°-9° (Mid-FFD), and (3) 10° or more (Max-FFD)...
October 9, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28993076/unicompartmental-knee-arthroplasty-achieves-greater-flexion-with-no-difference-in-functional-outcome-quality-of-life-and-satisfaction-vs-total-knee-arthroplasty-in-patients-younger-than-55-years-a-propensity-score-matched-cohort-analysis
#4
Graham Seow-Hng Goh, Hamid Rahmatullah Bin Abd Razak, Darren Keng-Jin Tay, Shi-Lu Chia, Ngai-Nung Lo, Seng-Jin Yeo
BACKGROUND: Improvements in surgical techniques, implant design, and adherence to indications have resulted in favorable outcomes after unicompartmental knee arthroplasty (UKA), particularly in an older population. However, no studies have compared the performance of contemporary UKA and total knee arthroplasty (TKA) in a young population. METHODS: Prospectively collected registry data of 160 UKAs performed in 160 patients younger than 55 years were reviewed. Propensity scores generated using logistic regression were used to adjust for confounding variables of age, gender, body mass index, preoperative range of motion, Knee Society Score, Oxford Knee Score, and Short-Form 36, allowing matching of the TKA cohort to the UKA cohort in a 1:1 ratio using the nearest-neighbor method...
September 19, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28989290/feasibility-of-the-atlas-unicompartmental-knee-system-load-absorber-in-improving-pain-relief-and-function-in-patients-needing-unloading-of-the-medial-compartment-of-the-knee-1-year-follow-up-of-a-prospective-multicenter-single-arm-pilot-study-phantom-high-flex
#5
Konrad Slynarski, Jacek Walawski, Robert Smigielski, Willem van der Merwe
In young patients with medial knee osteoarthritis (OA), surgical intervention may not be desirable due to preferences to avoid bone cutting procedures, return to high activity levels, and prolong implant survival. The Atlas Knee System was designed to fill the gap between ineffective conservative treatments and invasive surgery. This single-arm study included 26 patients, aged 25 to 65 years, who completed 12 months of follow-up. All dimensions of the Knee injury and Osteoarthritis Outcome Score (KOOS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and Knee Society Score significantly improved from baseline to 12 months...
2017: Clinical Medicine Insights. Arthritis and Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28983215/mid-term-outcomes-of-metal-backed-unicompartmental-knee-arthroplasty-show-superiority-to-all-polyethylene-unicompartmental-and-total-knee-arthroplasty
#6
Jelle P van der List, Laura J Kleeblad, Hendrik A Zuiderbaan, Andrew D Pearle
BACKGROUND: Two commonly used tibial designs for unicompartmental knee arthroplasty (UKA) are all-polyethylene "inlay" and metal-backed "onlay" components. Biomechanical studies showed that the metal baseplate in onlay designs better distributes forces over the tibia but studies failed to show differences in functional outcomes between both designs at mid-term follow-up. Furthermore, no studies have compared both designs with total knee arthroplasty (TKA). QUESTIONS/PURPOSES: The goal of this study was to compare outcomes of inlay UKA and onlay UKA at mid-term follow-up and compare these with TKA outcomes...
October 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28980106/severe-metallosis-and-elevated-chromium-in-serum-following-implantation-of-the-joint-unloading-implant-system
#7
Matthias Wolff, Carl Haasper, Akos Zahar, Christian Gauck, Thorsten Gehrke, Mustafa Citak
In recent years, the minimally invasive joint-preserving implant system has been developed. The main goal of this device is to unload the medial knee compartment without affecting the lateral compartment. The current authors describe a severe metallosis and elevated chromium in serum following implantation of the joint unloading implant system of a 50-year-old male patient, presented to our hospital 3 years after implantation of a KineSpring System into his left knee due to unicompartmental medial osteoarthritis (OA) in an external hospital...
October 4, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28977815/quantitative-evaluation-of-joint-space-width-in-the-lateral-compartment-after-medial-unicompartmental-knee-arthroplasty-comparison-of-three-radiographic-views
#8
Ju'an Yue, Wanshou Guo, Fuyin Wan, Pengfei Wen, Zhaohui Liu, Liming Cheng, Qidong Zhang, Yan Chen
No abstract text is available yet for this article.
October 4, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28974402/up-to-10-year-follow-up-of-the-oxford-domed-lateral-partial-knee-replacement-from-an-independent-centre
#9
Simon D S Newman, Altay Altuntas, Helen Alsop, Justin P Cobb
BACKGROUND: The Oxford Domed Lateral Partial Knee Replacement (ODLPKR) was designed specifically for the lateral compartment in response to the unacceptable dislocation rate seen with the Oxford Partial Knee. This paper presents the up to 10-year follow-up of an independent, single surgeon series using this implant. The aim of this study is to assess the medium term outcome of the ODLPKR. The primary outcome measures were 13 revision surgery, re-operation and functional outcome. METHODS: Sixty-four knees in 58 patients were performed between 2005 and 2009...
September 30, 2017: Knee
https://www.readbyqxmd.com/read/28964920/return-to-sports-and-quality-of-life-after-high-tibial-osteotomy-in-patients-under-60-years-of-age
#10
C Bastard, G Mirouse, D Potage, H Silbert, F Roubineau, P Hernigou, C H Flouzat-Lachaniette
INTRODUCTION: Since knee osteoarthritis is unicompartmental in most cases, a knee osteotomy is the most logical solution to limit degeneration of the arthritic compartment, thereby delaying knee arthroplasty. Younger patients have high functional demands. The purpose of this study was to evaluate the return to sports and quality of life after high tibial osteotomy (HTO) in athletic patients less than 60 years of age. The hypothesis was that patients can return to sports within 1 year of HTO...
September 27, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28963154/revision-total-knee-arthroplasty-for-failed-high-tibial-osteotomy-and-unicompartmental-knee-arthroplasty-have-similar-patient-reported-outcome-measures-in-a-two-year-follow-up-study
#11
J B T Lim, H C Chong, H N Pang, K J D Tay, S L Chia, N N Lo, S J Yeo
AIMS: Little is known about the relative outcomes of revision of unicompartmental knee arthroplasty (UKA) and high tibial osteotomy (HTO) to total knee arthroplasty (TKA). The aim of this study is to compare the outcomes of revision surgery for the two procedures in terms of complications, re-revision and patient-reported outcome measures (PROMs) at a minimum of two years follow-up. PATIENTS AND METHODS: This study was a retrospective review of data from an institutional arthroplasty registry for cases performed between 2001 and 2014...
October 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28946833/the-180%C3%A2-spin-of-meniscal-bearing-in-unicompartmental-knee-arthroplasty
#12
Su Chan Lee, Seung Hyun Hwang, Chang Hyun Nam, Seung Ryol Ryu, Hye Sun Ahn
Mobile-bearing Oxford medial unicompartmental knee arthroplasty (UKA) has been widely used and has produced good results in the treatment of medial compartmental osteoarthritis. But it is associated with the potential risk of meniscal bearing dislocation. Symptoms caused by most meniscal bearing dislocations include acute pain, knee swelling, and locking. We report two unusual cases of meniscal bearing spinning of 180° without remarkable symptoms, which would have been easily missed if we had not watched carefully...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28936684/kinematics-of-mobile-bearing-unicompartmental-knee-arthroplasty-compared-to-native-results-from-an-in-vitro-study
#13
Geert Peersman, Josh Slane, Philippe Vuylsteke, Susanne Fuchs-Winkelmann, Philipp Dworschak, Thomas Heyse, Lennart Scheys
INTRODUCTION: Fixed-bearing unicompartmental knee arthroplasty (UKA) closely replicates native knee kinematics. As few studies have assessed kinematics following mobile-bearing (MB) UKA, the current study aimed to investigate whether MB UKA preserves natural knee kinematics. MATERIALS AND METHODS: Seven fresh-frozen full-leg cadaver specimens were prepared and mounted in a kinematic rig that allowed all degrees of freedom at the knee. Three motion patterns, passive flexion-extension (0°-110° flexion), open-chain extension (5°-70° flexion) and squatting (30°-100° flexion), were performed pre- and post-implantation of a medial MB UKA and compared in terms of rotational and translational knee joint kinematics in the different anatomical planes, respectively...
September 21, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28913557/improved-joint-line-restitution-in-unicompartmental-knee-arthroplasty-using-a-robotic-assisted-surgical-technique
#14
Yannick Herry, Cécile Batailler, Timothy Lording, Elvire Servien, Philippe Neyret, Sebastien Lustig
PURPOSE: Joint-line restitution is one objective of unicompartmental knee arthroplasty (UKA). However, the joint line is often lowered when resurfacing femoral implants are used. The aim of this study was to compare the joint-line height in UKA performed by robotic-assisted and conventional techniques. METHODS: This retrospective case-control study compared two matched groups of patients receiving a resurfacing UKA between 2013 and 2016 by either a robotic-assisted (n = 40) or conventional (n = 40) technique...
September 14, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28882132/hospital-volume-and-the-risk-of-revision-in-oxford-unicompartmental-knee-arthroplasty-in-the-nordic-countries-an-observational-study-of-14-496-cases
#15
Mona Badawy, Anne M Fenstad, Christoffer A Bartz-Johannessen, Kari Indrekvam, Leif I Havelin, Otto Robertsson, Annette W-Dahl, Antti Eskelinen, Keijo Mäkelä, Alma B Pedersen, Henrik M Schrøder, Ove Furnes
BACKGROUND: High procedure volume and dedication to unicompartmental knee arthroplasty (UKA) has been suggested to improve revision rates. This study aimed to quantify the annual hospital volume effect on revision risk in Oxfordu nicompartmental knee arthroplasty in the Nordic countries. METHODS: 14,496 cases of cemented medial Oxford III UKA were identified in 126 hospitals in the four countries included in the Nordic Arthroplasty Register Association (NARA) database from 2000 to 2012...
September 7, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28879594/body-mass-index-changes-after-unicompartmental-knee-arthroplasty-do-not-adversely-influence-patient-outcomes
#16
Zhan Xia, Ming Han Lincoln Liow, Graham Seow-Hng Goh, Hwei Chi Chong, Ngai Nung Lo, Seng Jin Yeo
PURPOSE: The objective of this study is to evaluate the prevalence of patients who lost or gained weight following unicompartmental knee arthroplasty (UKA), the effect of post-operative body mass index (BMI) changes on functional outcomes and quality of life (QoL), and predictive factors associated with BMI changes. METHODS: Prospectively collected data of 1043 patients who underwent UKA between 2000 and 2014 were reviewed. BMI, Knee Society Knee Score and Function Score, Oxford Knee Score (OKS), Short-Form 36 (SF-36) Physical Component Score (PCS) and Mental Component Score and proportion of patients attaining OKS/SF-36 minimal clinically important differences (MCID) were recorded preoperatively and at 2 years post-operatively...
September 6, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28860683/simultaneous-ipsilateral-knee-arthroscopy-and-unicondylar-knee-arthroplasty-is-effective-for-bicompartmental-symptoms
#17
Akshay Lakra, Taylor Murtaugh, Jeffrey A Geller, William Macaulay, Roshan P Shah
BACKGROUND: Patients with unicompartmental radiographic arthritis but bicompartmental symptoms pose a clinical challenge. Some surgeons may perceive it as a contraindication for unicondylar knee arthroplasty (UKA). We investigated patient outcomes 2 years after simultaneous ipsilateral arthroscopy and UKA as compared to a similar group of patients who had total knee replacement (TKA) for a similar clinical presentation. METHODS: We identified 9 patients with simultaneous ipsilateral arthroscopy and UKA between 2004 and 2013, and 12 clinically similar patients treated with TKA...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28855192/the-effect-of-implant-position-on-bone-strain-following-lateral-unicompartmental-knee-arthroplasty-a-biomechanical-model-using-digital-image-correlation
#18
A M Ali, S D S Newman, P A Hooper, C M Davies, J P Cobb
OBJECTIVES: Unicompartmental knee arthroplasty (UKA) is a demanding procedure, with tibial component subsidence or pain from high tibial strain being potential causes of revision. The optimal position in terms of load transfer has not been documented for lateral UKA. Our aim was to determine the effect of tibial component position on proximal tibial strain. METHODS: A total of 16 composite tibias were implanted with an Oxford Domed Lateral Partial Knee implant using cutting guides to define tibial slope and resection depth...
August 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28852354/popliteal-baker-s-cysts-in-the-setting-of-primary-knee-arthroplasty
#19
Josef N Tofte, Andrew J Holte, Nicolas Noiseux
BACKGROUND: Popliteal (Baker's) Cysts are rare complications of knee arthroplasty. Enlargement, irritation, or rupture of the cyst can lead to significant pain, tightness, and tenderness. The literature regarding popliteal cysts occurring following knee arthroplasty is limited and does not report prevalence, natural history, and treatment of popliteal cyst in the setting of knee arthroplasty. METHODS: Following Institutional Review Board approval, 2,025 primary total and partial knee arthroplasties by four surgeons at one institution from 2011-2016 were reviewed for occurrence of popliteal cysts...
2017: Iowa Orthopaedic Journal
https://www.readbyqxmd.com/read/28841732/indication-for-unicompartmental-knee-replacement-versus-osteotomy-around-the-knee
#20
Philipp Lobenhoffer
No abstract text is available yet for this article.
October 2017: Journal of Knee Surgery
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