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https://read.qxmd.com/read/31103415/knee-related-quality-of-life-functional-results-and-osteoarthritis-at-a-minimum-of-20-years-follow-up-after-anterior-cruciate-ligament-reconstruction
#1
Matias Costa-Paz, Ignacio Garcia-Mansilla, Sebastian Marciano, Miguel Angel Ayerza, D Luis Muscolo
BACKGROUND: Few studies in the literature show results with more than 20 years of follow-up after anterior cruciate ligament reconstruction (ACLR). The main purpose of this retrospective study was to describe knee-specific quality of life, functional results and prevalence of osteoarthritis (OA) of the knee in patients with ACLR using bone-patellar tendon-bone (BPTB) autograft with ultra-long-term follow-up. METHODS: Prospective analyzed data included demographics, meniscus status, radiographic OA, KT-1000 arthrometer measurements and physical examinations...
May 15, 2019: Knee
https://read.qxmd.com/read/31103414/relationship-between-anterior-cruciate-ligament-and-anterolateral-meniscal-root-bony-attachment-high-resolution-3-t-mri-analysis
#2
Takeshi Oshima, Murilo Leie, Samuel Grasso, David A Parker
BACKGROUND: The tibial bony attachments of the anterior cruciate ligament (ACL) and the anterolateral meniscal root (ALMR) are very close, and drilling the tibial tunnel in ACL reconstruction may damage the ALMR attachment. This study investigated the relationship between the tibial attachment of the ACL and ALMR using high-resolution 3-T magnetic resonance imaging (MRI). METHODS: Twenty healthy subjects (35.8 ± 13.0 years) had 20 knees scanned using high resolution 3-T MRI...
May 15, 2019: Knee
https://read.qxmd.com/read/31097362/contributions-of-muscles-and-external-forces-to-medial-knee-load-reduction-due-to-osteoarthritis-braces
#3
Scott C E Brandon, Marcus J Brown, Allison L Clouthier, Aaron Campbell, Jim D Richards, Kevin J Deluzio
BACKGROUND: Braces for medial knee osteoarthritis can reduce medial joint loads through a combination of three mechanisms: application of an external brace abduction moment, alteration of gait dynamics, and reduced activation of antagonistic muscles. Although the effect of knee bracing has been reported independently for each of these parameters, no previous study has quantified their relative contributions to reducing medial knee loads. METHODS: In this study, we used a detailed musculoskeletal model to investigate immediate changes in medial and lateral loads caused by two different knee braces: OA Assist and OA Adjuster 3 (DJO Global)...
May 13, 2019: Knee
https://read.qxmd.com/read/31078394/why-are-revision-knee-replacements-failing
#4
Sanjeev Agarwal, Rakan Kabariti, Rahul Kakar, D'Jon Lopez, Rhidian Morgan-Jones
AIM: The number of knee revisions worldwide has been steadily increasing. While being complex and expensive operations, a high percentage of knee revisions fail early. This study was conducted to evaluate the causes of failure of revision knee replacements. PATIENTS AND METHODS: This study retrospectively evaluated 95 patients following knee revision surgery and who underwent further knee revision operations. Indications for index revision as well as the reason for re-revision were recorded...
May 8, 2019: Knee
https://read.qxmd.com/read/31078393/comprehensive-description-of-t2-value-spatial-variations-in-non-osteoarthritic-femoral-cartilage-using-three-dimensional-registration-of-morphological-and-relaxometry-data
#5
Shannon N Edd, Hugo Babel, Nadia Kerkour, Brigitte M Jolles, Patrick Omoumi, Julien Favre
PURPOSE: The aim of this study was to develop and assess a method of quantifying cartilage T2 relaxation times in a series of volumes of interest (VOIs) covering the entire cartilage of the femoral condyles. Subsequently, the method was used to test for T2 spatial variations in non-osteoarthritic (OA) knees. METHODS: Ten non-OA subjects (five female, average 30 years) were enrolled after informed consent. Three-dimensional bone and cartilage models were created by double echo steady state (DESS) morphological magnetic resonance image (MRI) segmentation, and the models were semi-manually registered with multi-slice, multi-echo (MSME) T2 MRI...
May 8, 2019: Knee
https://read.qxmd.com/read/31078392/different-clinical-outcomes-on-the-second-side-after-staged-total-knee-replacement-a-systematic-review
#6
Michael-Alexander Malahias, Alex Gu, Jacqueline Addona, Allina A Nocon, Alberto V Carli, Peter K Sculco
BACKGROUND: The clinical outcomes of the contralateral side in staged bilateral total knee arthroplasty (BTKA) are relatively unknown. The purpose of this study was to answer: 1) Does the second-operated knee in a staged BTKA result in inferior clinical and functional outcomes? 2) Is the duration of time between the first- and the second-operated knee defined in a consistent fashion in the literature? 3) Does the time interval between TKAs influence clinical outcomes? METHODS: Two reviewers independently conducted a systematic search of the literature using different databases according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines...
May 8, 2019: Knee
https://read.qxmd.com/read/31078391/tibial-insertion-of-the-anterior-cruciate-ligament-and-anterior-horn-of-the-lateral-meniscus-share-the-lateral-slope-of-the-medial-intercondylar-ridge-a-computed-tomography-study-in-a-young-healthy-population
#7
Yasukazu Yonetani, Akira Tsujii, Kazutaka Kinugasa, Masayuki Hamada, Konsei Shino
BACKGROUND: The central intercondylar ridge (CIR) is an anatomical bony landmark that bisects the slope of the medial intercondylar ridge (MIR) between the tibial insertion of the anterior cruciate ligament (ACL) and anterior horn of lateral meniscus (AHLM) and was recently revealed by computed tomography (CT) evaluation corresponding to histologic slices of cadaveric knees. The purpose of this study was to clarify the shape and size of ACL and AHLM tibial insertion in young, healthy knees using the new bony landmark (CIR) and previously reported landmarks...
May 8, 2019: Knee
https://read.qxmd.com/read/31078390/tibial-tubercle-proximalization-as-quadriceps-lengthening-in-treating-severe-habitual-patellar-dislocation-in-adults
#8
Guan-Yang Song, Hui Zhang, Jin Zhang, Zhi-Jun Zhang, Hua Feng
BACKGROUND: To describe a novel 'four-in-one' procedure - including tibial tubercle proximalization, extensive lateral release, tibial tubercle medialization, and medial patellofemoral ligament reconstruction - for treating severe habitual patellar dislocation (HPD) in adults, and to report its early clinical outcomes. METHODS: Thirteen patients (13 knees) with severe primary HPD received this procedure. Results of the physical examinations, including apprehension tests and patellar tracking throughout full range of motion, were recorded pre-operatively and at final follow-up...
May 8, 2019: Knee
https://read.qxmd.com/read/31076246/discoid-lateral-meniscal-repair-without-saucerization-for-adolescents-with-peripheral-longitudinal-tear
#9
Kazutaka Kinugasa, Masayuki Hamada, Yasukazu Yonetani, Tomohiko Matsuo, Tatsuo Mae, Ken Nakata, Shuji Horibe
Recently, successful clinical outcomes for symptomatic discoid lateral meniscus (DLM) have been reported following partial meniscectomy (saucerization) with repair. In contrast, some studies using radiography and magnetic resonance imaging (MRI) have suggested that function of load transmission might not be appropriately maintained after saucerization with repair. Therefore, in pursuit to uphold load transmission after surgery for DLM, this study tried to preserve the DLM shape to keep the original DLM function...
May 7, 2019: Knee
https://read.qxmd.com/read/31047797/can-total-knee-arthroplasty-restore-the-correlation-between-radiographic-mechanical-axis-angle-and-dynamic-coronal-plane-alignment-during-gait
#10
Gabriel Larose, Alexandre Fuentes, Frederic Lavoie, Rachid Aissaoui, Jacques de Guise, Nicola Hagemeister
BACKGROUND: Total knee arthroplasty (TKA) is the treatment of choice for end-stage knee osteoarthritis. Postoperative static knee alignment has been recognized as a key component of successful surgery. A correction toward the kinematics of a native knee is expected after TKA, with an aim for neutral mechanical alignment. The evolution of frontal plane knee kinematics is not well understood. METHODS: Nineteen patients awaiting TKA were recruited. Three-dimensional knee kinematics during treadmill gait were assessed pre-operatively, 12 months after surgery, and compared to a control group of 17 asymptomatic participants...
April 29, 2019: Knee
https://read.qxmd.com/read/31031127/vancomycin-soaked-wrapping-of-harvested-hamstring-tendons-during-anterior-cruciate-ligament-reconstruction-a-review-of-the-vancomycin-wrap
#11
James G Jefferies, Joanna M S Aithie, Simon J Spencer
The practice of 'vancomycin wrapping' of harvested hamstring autografts during Anterior Cruciate Ligament Reconstruction (ACLR) surgery has gathered recent interest. This practice involves the wrapping of harvested grafts in a vancomycin-soaked swab during the preparatory phase. Different techniques are observed, and a small number of studies have shown that pre-soaking hamstring ACLR grafts in this manner dramatically reduces the post-surgical infection rate compared with standard intravenous antibiotic prophylaxis alone...
April 25, 2019: Knee
https://read.qxmd.com/read/31031126/changes-in-total-lower-limb-support-moment-in-middle-aged-patients-undergoing-arthroscopic-partial-meniscectomy-a-longitudinal-observational-cohort-study
#12
Anders Holsgaard-Larsen, Jonas B Thorlund, Tim Blackmore, Mark W Creaby
BACKGROUND: Patients with a meniscal tear are frequently treated with arthroscopic partial meniscectomy (APM) which may alter the net extension moment across the entire lower limb - known as the total support moment (TSM). PURPOSE: To investigate changes in TSM during walking in patients undergoing APM. METHODS: Three-dimensional motion analysis of walking was performed in individuals with meniscal tear prior to APM and 12 months after. Peak TSM, positive ankle (ASM), knee (KSM), and hip (HSM) moments at the time of peak TSM were calculated together with corresponding angular impulses...
April 25, 2019: Knee
https://read.qxmd.com/read/31031125/diagnosis-and-management-of-chondral-delamination-injuries-of-the-knee
#13
Anthony A Theodorides, Andy Williams, Hugo Guthrie, Sam Church
BACKGROUND: Chondral delamination with intact articular surface is an under-recognised entity with no previous reports on how it should be managed. The purpose of this article is to increase awareness of this entity and make recommendations for its management. METHODS: We present a small case series of three patients who presented with knee pain and subsequent MRI scans revealed chondral delamination with intact articular surface as the only explanation of symptoms...
April 25, 2019: Knee
https://read.qxmd.com/read/30954334/assessment-of-objective-dynamic-knee-joint-control-in-anterior-cruciate-ligament-deficient-and-reconstructed-individuals
#14
Kenneth B Smale, Tine Alkjaer, Teresa E Flaxman, Michael R Krogsgaard, Erik B Simonsen, Daniel L Benoit
BACKGROUND: There is a lack of objective dynamic knee joint control measures that can be related to the status of the anterior cruciate ligament (ACL). The purpose of this study was to introduce two novel measures and apply a third to determine how dynamic knee joint control changes in relation to ACL status during dynamic movements. METHODS: Twenty patients (13 male) were tested pre- (ACLd) and 10-months post- (ACLr) ACL reconstructive surgery and matched to an uninjured participant (CON)...
April 3, 2019: Knee
https://read.qxmd.com/read/30948304/mechanical-characterization-of-the-ligaments-in-subject-specific-models-of-the-patellofemoral-joint-using-in-vivo-laxity-tests
#15
Mohammad Akbar, Farzam Farahmand, Navid Arjmand
BACKGROUND: The purpose of this study was to propose a methodology for mechanical characterization of the ligaments in subject-specific models of the patellofemoral joint (PFJ) of living individuals. METHOD: PFJ laxity tests were performed on a healthy volunteer using a specially designed loading apparatus under biplane fluoroscopy. A three-dimensional (3D) parametric model of the PFJ was developed in the framework of the rigid body spring model using the geometrical data acquired from the subject's computed tomography and magnetic resonance images...
April 1, 2019: Knee
https://read.qxmd.com/read/30929792/short-term-survival-of-cementless-oxford-unicondylar-knee-arthroplasty-based-on-the-finnish-arthroplasty-register
#16
Jani Knifsund, Aleksi Reito, Jaason Haapakoski, Tuukka Niinimäki, Antti Eskelinen, Jarkko Leskinen, Ari-Pekka Puhto, Jukka Kettunen, Mikko Manninen, Keijo T Mäkelä
BACKGROUND: Cementless unicondylar knee arthroplasty (UKA) was introduced to secure long-term fixation and reduce the risk of revision. Experience with cementless UKA fixation is limited. METHODS: The short-term survival (up to five years) of cementless Oxford UKA was assessed using data from the Finish Arthroplasty Register and was compared with that of cemented Oxford 3 UKA and total knee arthroplasty (TKA). Datawere obtained, from the Finnish Arthroplasty Register, on 1076 cementless Oxford UKAs and 2279 cemented Oxford 3 UKAs performed for primary osteoarthritis in 2005-2015...
March 28, 2019: Knee
https://read.qxmd.com/read/30926225/a-new-landmark-for-measuring-tibial-component-rotation-after-total-knee-arthroplasty
#17
Fahd F Mahmood, Nicholas J Holloway, Angela H Deakin, Jon V Clarke, Frederic Picard
BACKGROUND: Existing methods for assessment of total knee arthroplasty (TKA) component rotation on computed tomography (CT) scans are complex, especially in relation to the tibial component. Anecdotal evidence from our practice pointed towards a potential new landmark. The study aims were to check the prevalence of this landmark, define tibial component rotation in relation to it and demonstrate its reliability. METHODS: Two hundred and eleven CTs undertaken following TKA were reviewed for presence of the landmark...
March 26, 2019: Knee
https://read.qxmd.com/read/30910628/sagittal-shapes-of-current-fixed-bearing-unicompartmental-knee-replacements-differ-from-those-of-normal-knees
#18
Kyung Jin Cho, Pieter J Erasmus, Jacobus H Müller
BACKGROUND: The principle when performing unicompartmental knee replacements (UKR), is to restore the natural alignment as well as the ligament tension. The tension in the ligaments is determined by the position of the joint line and the geometry of the articulating surfaces of the joint. If the surface geometry of the femoral component in a UKR is different from that of the natural knee it might cause abnormal ligament tension. This study was undertaken to determine the surface geometry of the native knee and to compare that with the geometry of different commercially available UKR femoral components...
March 22, 2019: Knee
https://read.qxmd.com/read/30910627/short-term-patient-outcomes-after-total-knee-arthroplasty-does-the-implant-matter
#19
Ilda B Molloy, Benjamin J Keeney, Michael B Sparks, Nicholas G Paddock, Karl M Koenig, Wayne E Moschetti, David S Jevsevar
BACKGROUND: Newer implants for total knee arthroplasty (TKA) often gain market share at higher cost with little patient-reported and long-term clinical data. We compared outcomes after TKA using two different implants: DePuy PFC Sigma and Attune. METHODS: Using a prospective data repository from an academic tertiary medical center, we analyzed 2116 TKAs (1603 Sigma and 513 Attune) from April 2011 through July 2016. Outcomes included length of surgery, length of stay, facility discharge, 90-day reoperation, range of motion (ROM) change, and patient-reported physical function (PCS)...
March 22, 2019: Knee
https://read.qxmd.com/read/30910626/the-anatomy-of-the-anterolateral-structures-of-the-knee-a-histologic-and-macroscopic-approach
#20
Matthias Brockmeyer, Patrick Orth, Denis Höfer, Romain Seil, Friedrich Paulsen, Michael D Menger, Dieter Kohn, Thomas Tschernig
BACKGROUND: The anatomy of the anterolateral structures of the knee is complex and still controversial. The aim of our study was to analyze this anatomy by histologic and macroscopic evaluation, with a particular emphasis on the anterolateral ligament (ALL). MATERIAL AND METHODS: Twenty-three cadaveric knee joints were dissected followed by a qualitative and quantitative anatomic analysis of the anterolateral knee structures. Histology and comparison of different anterolateral structures was performed in addition...
March 22, 2019: Knee
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