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https://www.readbyqxmd.com/read/28681088/mediolateral-femoral-component-position-in-tka-significantly-alters-patella-shift-and-femoral-roll-back
#1
Arnd Steinbrück, Christian Schröder, Matthias Woiczinski, Florian Schmidutz, Peter E Müller, Volkmar Jansson, Andreas Fottner
PURPOSE: Increased retropatellar pressure and altered kinematics are associated with anterior knee pain and unsatisfied patients after total knee arthroplasty (TKA). Since malposition of the implant is believed to contribute to postoperative pain, we performed this in vitro study to evaluate the influence of mediolateral femoral component position on retropatellar pressure as well as tibio-femoral and patella kinematics. METHODS: For the test, a fixed-bearing TKA was implanted in eight fresh frozen cadaver specimens...
July 5, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28571921/variability-in-static-alignment-and-kinematics-for-kinematically-aligned-tka
#2
Willy Theodore, Joshua Twiggs, Elizabeth Kolos, Justin Roe, Brett Fritsch, David Dickison, David Liu, Lucy Salmon, Brad Miles, Stephen Howell
BACKGROUND: Total knee arthroplasty (TKA) significantly improves pain and restores a considerable degree of function. However, improvements are needed to increase patient satisfaction and restore kinematics to allow more physically demanding activities that active patients consider important. The aim of our study was to compare the alignment and motion of kinematically and mechanically aligned TKAs. METHODS: A patient specific musculoskeletal computer simulation was used to compare the tibio-femoral and patello-femoral kinematics between mechanically aligned and kinematically aligned TKA in 20 patients...
May 29, 2017: Knee
https://www.readbyqxmd.com/read/28511465/digging-deeper-into-the-patello-femoral-joint-patello-femoral-composite-a-new-dimension-for-overstuffing-of-patello-femoral-joint
#3
Vikram Kishor Kandhari, Mohan M Desai, Surendar S Bava, Roshan N Wade
INTRODUCTION: Patello-femoral complications are the most common complications in postoperative Total Knee Arthroplasty (TKA) patients especially overstuffing of Patello - Femoral Joint (PFJ). So, to study the effects of overstuffing of PFJ in postoperative TKA patients we put forth a new dimension - "PATELLO - FEMORAL COMPOSITE (PFC)". This is the maximum distance between anterior cortical line of femur shaft and the anterior cortex of patella with knee in full extension. AIM: To calculate chances of overstuffing of PFJ in postoperative TKA patients and document the effect of overstuffing of PFJ on the passive knee Range of Motion (ROM) in post- op TKA patients...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28500391/anterior-referencing-of-tibial-slope-in-total-knee-arthroplasty-considerably-influences-knee-kinematics-a-musculoskeletal-simulation-study
#4
Marco A Marra, Marta Strzelczak, Petra J C Heesterbeek, Sebastiaan A W van de Groes, Dennis W Janssen, Bart F J M Koopman, Ate B Wymenga, Nico J J Verdonschot
PURPOSE: In total knee arthroplasty (TKA), the posterior tibial slope is not always reconstructed correctly, and the knee ligaments may become too tight in flexion. To release a tight flexion gap, surgeons can increase the posterior tibial slope using two surgical resection techniques: the anterior tibial cortex (ACR) or the centre of tibial plateau (CPR) referencing. It is not known how this choice affects the knee laxity and function during activities of daily living. The aim of this study was to investigate the effect of tibial slope on knee laxity, kinematics and forces during a squatting activity using computer simulation techniques...
May 12, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28499486/intra-osseous-local-anaesthetic-patellar-pain-catheter-suppresses-osteoarthritic-patello-femoral-pain
#5
Dominik C Meyer, José A Aguirre, Karl Wieser, Sandro F Fucentese, Stephan Wirth, Christian Gerber, Stefan Rahm
BACKGROUND: The source of pain in patellofemoral osteoarthritis is not fully understood. The purpose of this study was to identify the origin of pain using intraosseous pain catheters and to show early results with an osteotomy that is potentially denervating and hydrostatic pressure-relieving. METHODS: Five patients with patellofemoral osteoarthritis and pain with straight downward patellofemoral compression were included. All underwent arthroscopic placement of two 0...
May 9, 2017: Knee
https://www.readbyqxmd.com/read/28213703/proximal-tibial-bony-and-meniscal-slopes-are-higher-in-acl-injured-subjects-than-controls-a-comparative-mri-study
#6
Ashraf Elmansori, Timothy Lording, Raphaël Dumas, Khalifa Elmajri, Philippe Neyret, Sébastien Lustig
PURPOSE: Increased tibial slope is reported as a risk factor of non-contact anterior cruciate ligament (ACL) injury, but the effect of the soft tissues on slope remains unclear. The primary aims of this study were to compare the tibial bony and soft tissue slopes between patients with and without ACL injury, and to investigate the relationship between the meniscal slopes (MS) and the tibial bony slope. Our hypothesis was that the menisci would correct the inclination of the bony tibial slope towards the horizontal...
February 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28128473/obesity-and-radiological-severity-are-associated-with-viscosupplementation-failure-in-patients-with-knee-osteoarthritis
#7
Florent Eymard, Xavier Chevalier, Thierry Conrozier
Viscosupplementation (VS) is still controversial. One of the key points is the lack of well-identified factors of response. We aimed to identify clinical and radiological factors associated with lack of relevant response after intra-articular (IA) hyaluronic acid (HA) injections in symptomatic knee osteoarthritis patients. A post hoc analysis of the HAV-2012 trial, a controlled, multicentre, double-blind, randomized, non-inferiority trial comparing 3 weekly IA injections of HA (HAnox-M or BioHA) for symptomatic tibiofemoral OA was performed...
January 27, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27999926/results-of-arthroscopic-treatment-in-unresolved-osgood-schlatter-disease-in-athletes
#8
Esra Circi, Tahsin Beyzadeoglu
AIM OF THE STUDY: In this study we aimed to determine outcomes following arthroscopic ossicle excision in athletes with unresolved Osgood-Schlatter disease (OSD). METHOD: Arthroscopy was performed on 11 patients (11 knees) with OSD between September 2008 and November 2014. Surgical treatment inclusion criteria were determined as: failure of conservative treatment; isolated pain over the tibial tubercle and distal patellar tendon; pain limiting sporting performance at a competitive level...
February 2017: International Orthopaedics
https://www.readbyqxmd.com/read/27818185/validation-of-a-french-patient-reported-outcome-measure-for-patello-femoral-disorders-the-lille-patello-femoral-score
#9
S Putman, F Rémy, G Pasquier, F Gougeon, H Migaud, A Duhamel
BACKGROUND: The diagnosis of patello-femoral instability (PFI) relies chiefly on the patient's clinical findings. Nevertheless, few clinical scores specifically designed to evaluate the patello-femoral joint are available. The Lille scoring system is a 12-item self-questionnaire yielding a score from 0 to 100 that is used in France but has not been validated. We therefore conducted a validation study in a population of younger patients with PFI. HYPOTHESIS: The Lille scoring system meets validation criteria for patient-reported outcome measures (PROMs)...
December 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27699725/arthroscopic-lateral-retinacular-release-and-modified-elmslie-trillat-operation-improve-severe-isolated-lateral-patello-femoral-osteoarthritis
#10
Renn-Chia Lin, Ko-Huang Lue, Ko-Hsiu Lu
To evaluate whether arthroscopic lateral retinacular release and the modified Elmslie-Trillat operation improve osteoarthritis (OA) progression and clinical outcomes in patients with severe isolated lateral patello-femoral OA. Nine women (11 knees) and one man (one knee) with isolated late-stage lateral patello-femoral OA underwent surgery. The severity of patello-femoral OA was recorded using the Merchant method, while the level of pain and anterior knee function were scored using the visual analogue scale (VAS) and Kujala knee scores, respectively...
July 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/27393009/structural-effects-of-sprifermin-in-knee-osteoarthritis-a-post-hoc-analysis-on-cartilage-and-non-cartilaginous-tissue-alterations-in-a-randomized-controlled-trial
#11
Frank W Roemer, Aida Aydemir, Stefan Lohmander, Michel D Crema, Monica Dias Marra, Norma Muurahainen, David T Felson, Felix Eckstein, Ali Guermazi
BACKGROUND: A recent publication on efficacy of Sprifermin for knee osteoarthritis (OA) using quantitatively MRI-defined central medial tibio-femoral compartment cartilage thickness as the structural primary endpoint reported no statistically significant dose response. However, Sprifermin was associated with statistically significant, dose-dependent reductions in loss of total and lateral tibio-femoral cartilage thickness. Based on these preliminary promising data a post-hoc analysis of secondary assessment and endpoints was performed to evaluate potential effects of Sprifermin on semi-quantitatively evaluated structural MRI parameters...
July 9, 2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27392843/impairments-of-postural-stability-core-endurance-fall-index-and-functional-mobility-skills-in-patients-with-patello-femoral-pain-syndrome
#12
Gul Deniz Yilmaz Yelvar, Yasemin Çirak, Murat Dalkilinç, Yasemin Parlak Demir, Gul Baltaci, Mahmut Kömürcü, Gul Deniz Yilmaz Yelvar
BACKGROUND: Postural control allows performance of daily and sports activities. The previous studies show that postural sway inceases in orthopaedic injuries such as osteoarthritis and total knee arthroplasty. OBJECTIVE: To compare postural sway, risk of falling and function between individuals with and without patellofemoral pain syndrome (PFS). METHODS: This study included 22 subjects with patellofemoral pain syndrome, age-matched pain-free 22 females serving as a control group...
June 30, 2016: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/27331033/medial-patello-femoral-ligament-mpfl-reconstruction-using-suture-anchors-fixation-preliminary-results
#13
Filippo Calanna, Luca Pulici, Giulia Carimati, Alessandro Quaglia, Piero Volpi
PURPOSE: several surgical techniques have been described for the MPFL reconstruction, using many femoral and patellar fixation techniques and different grafts (autograft, allograft, synthetic). The goal of our study is to evaluate the safety and efficacy of MPFL reconstruction using Juggerknot™ (BIOMET, Warsaw, Indiana) suture anchors fixation with a clinical evaluation pre/post surgery of our patients with objective patellofemoral (PF) instability. METHODS: from January 2013 to March 2015, 19 patients underwent isolated MPFL reconstruction using Juggerknot™ (BIOMET, Warsaw, Indiana) suture anchors fixation...
January 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/26894660/reconstruction-of-medial-patello-femoral-ligament-comparison-of-two-surgical-techniques
#14
G Criscenti, C De Maria, E Sebastiani, M Tei, G Placella, A Speziali, G Vozzi, G Cerulli
The medial patello-femoral ligament is considered the most important passive patellar stabilizer and its proper functionality is essential for the patello-femoral joint stability. In this work, 18 human knees were randomly divided into two groups and reconstructed through two different surgical techniques: the "Through tunnel tendon" and the "Double converging tunnel" reconstructions. Subsequently, the samples were mechanically tested to evaluate the structural properties of reconstructed femur-MPFL-Patella complex (rFMPC)...
June 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/26873710/biomechanical-evaluation-of-medial-patello-femoral-ligament-reconstruction-comparison-between-a-double-bundle-converging-tunnels-technique-versus-a-single-bundle-technique
#15
G Placella, A Speziali, E Sebastiani, S Morello, M M Tei, G Cerulli
BACKGROUND: Several MPFL reconstructions are commonly performed for recurrent patellar dislocation, but misleading data are currently available in the literature on the ability of the different techniques to re-create a functioning ligament. MATERIALS AND METHODS: In this study, we showed the biomechanical properties of two different procedures for MPFL reconstruction using a natural orientation during uniaxial tensile testing. Eighteen fresh-frozen human knees were randomly assigned to two groups of nine each...
August 2016: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/26753845/analysis-of-the-effects-of-high-tibial-osteotomy-on-tibial-rotation
#16
Stefan Hinterwimmer, Matthias J Feucht, Jochen Paul, Chlodwig Kirchhoff, Martin Sauerschnig, Andreas B Imhoff, Knut Beitzel
PURPOSE: Limited literature reports on internal and external rotation of the distal fragment in the context of valgus open wedge (OW) high tibial osteotomy (HTO). In the authors clinical observation, the distal fragment was always rotated internally in relation to the proximal fragment by the end of the surgical procedure. The purpose was to evaluate the influence of valgus OW-HTO on post-operative tibial torsion. STUDY DESIGN: Prospective case series. METHODS: Fifty patients (10 female, 40 male; mean age 42...
September 2016: International Orthopaedics
https://www.readbyqxmd.com/read/26726982/is-there-an-ideal-patellar-thickness-following-total-knee-arthroplasty
#17
REVIEW
Todd P Pierce, Julio J Jauregui, Jeffrey J Cherian, Randa K Elmallah, Steven F Harwin, Michael A Mont
Orthopedic surgeons resurface the patella during total knee arthroplasty to avoid complications such as pain, patello-femoral arthritis, and patellar maltracking and to reduce the risk for reoperation. However, many complications, such as decreased range of motion, increased fractures, and polyethylene wear, have been described with this procedure. One determinant when resurfacing a patella is the thickness of its cuts. This review aims to investigate the relationship between patellar thickness and outcome parameters such as range of motion, patient-reported outcomes, periprosthetic fractures, and reoperations...
January 2016: Orthopedics
https://www.readbyqxmd.com/read/26615591/unconstrained-total-knee-arthroplasty-in-significant-valgus-deformity-a-modified-surgical-technique-to-balance-the-knee-and-avoid-instability
#18
R Pagoti, S O'Brien, E Doran, D Beverland
PURPOSE: Correction of valgus deformity in total knee arthroplasty (TKA) is technically challenging and has produced variable results. A modified surgical technique involving adapting the distal femoral cut with minimal soft tissue release is proposed. The authors hypothesise that using this technique would result in satisfactory radiological and functional outcome. METHODS: The technique involves balancing the knee in extension by changing the distal femoral resection angle and confining soft tissue release to only the posterolateral capsule if required...
November 28, 2015: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/26573904/quasi-linear-viscoelastic-properties-of-the-human-medial-patello-femoral-ligament
#19
G Criscenti, C De Maria, E Sebastiani, M Tei, G Placella, A Speziali, G Vozzi, G Cerulli
The evaluation of viscoelastic properties of human medial patello-femoral ligament is fundamental to understand its physiological function and contribution as stabilizer for the selection of the methods of repair and reconstruction and for the development of scaffolds with adequate mechanical properties. In this work, 12 human specimens were tested to evaluate the time- and history-dependent non linear viscoelastic properties of human medial patello-femoral ligament using the quasi-linear viscoelastic (QLV) theory formulated by Fung et al...
December 16, 2015: Journal of Biomechanics
https://www.readbyqxmd.com/read/26516437/the-comparison-of-neoprene-palumbo-and-genu-direxa-stable-orthosis-effects-on-pain-and-activity-of-daily-living-in-patients-with-patellofemoral-syndrome-a-randomized-blinded-clinical-trial
#20
Mohammad Sadegh Ghasemi, Naser Dehghan
BACKGROUND: Patellofemoral pain syndrome (PFPS) is one of the most common disorders of the knee. Conservative approaches, as well as surgery, can decrease pain and the syndrome's progress effectively. OBJECTIVE: The aim of this study was to determine the effectiveness of neoprene palumbo orthosis (NPO) and Genu direxa stable orthosis (GDSO) on pain and the activities of daily living (ADL). METHODS: Thirty patients (males, ages 18 to 40) participated in this randomized blinded clinical trial...
October 2015: Electronic Physician
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