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Patella tendon

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https://www.readbyqxmd.com/read/27915446/superior-dislocation-of-the-patella-a-pathognomonic-finding-and-review-of-literature
#1
P W van Egmond, M C Vermeulen, C F van Dijke, H C A Graat
A 59-year-old woman with a painful right knee that became locked in extension after a trivial trauma was seen at the emergency room. This was caused by unloaded hyperextension in bed. She was diagnosed with a superior dislocation of the patella. A closed reduction was performed, but a recurrent episode was seen within a week. An arthroscopy was performed, in which the causative osteophytes were removed. In the 12-month follow-up after treatment, no recurrence was seen. A superior dislocation of the patella is caused by patellofemoral osteophytes that interlock...
December 3, 2016: Skeletal Radiology
https://www.readbyqxmd.com/read/27894010/a-magnetic-resonance-imaging-study-of-abnormalities-of-the-patella-and-patellar-tendon-that-predispose-children-to-acute-patellofemoral-dislocation
#2
Barış Yılmaz, Esin Derin Çiçek, Evrim Şirin, Güzelali Özdemir, Özgün Karakuş, Hasan Hilmi Muratlı
This study compared 20 children hospitalised with acute patellofemoral dislocation with an age-matched healthy control group with no history of knee problems or patellar dislocation. The following morphological parameters were significantly different between the groups: the mean patellar width and length, mean sulcus depth, mean patellar tendon width and total patellar volume. The magnetic resonance imaging findings of this study suggested that structurally smaller than normal patella and patellar tendon volumes are predisposing factors for acute patellofemoral dislocation...
November 17, 2016: Clinical Imaging
https://www.readbyqxmd.com/read/27876459/local-and-widespread-hyperalgesia-in-female-runners-with-patellofemoral-pain-are-influenced-by-running-volume
#3
Marcella Ferraz Pazzinatto, Danilo de Oliveira Silva, Juliana Pradela, Maira Bergamaschi Coura, Christian Barton, Fábio Mícolis de Azevedo
OBJECTIVES: To compare pressure pain threshold (PPT) around the knee (local hyperalgesia) and at a site remote to the knee (widespread hyperalgesia) between female runners with and without patellofemoral pain (PFP); and to evaluate the relationship between running volume, self-reported knee function and PPT measures. DESIGN: Cross-sectional study. METHODS: Twenty female runners with PFP and twenty pain-free female runners participated in the study...
November 11, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27855678/augmentation-and-repair-of-tendons-using-demineralised-cortical-bone
#4
Sherif Elnikety, Catherine J Pendegrass, Roberta Ferro de Godoy, Charles Holden, Gordon W Blunn
BACKGROUND: In severe injuries with loss of tendon substance a tendon graft or a synthetic substitute is usually used to restore functional length. This is usually associated with donor site morbidity, host tissue reactions and lack of remodelling of the synthetic substitutes, which may result in suboptimal outcome. A biocompatible graft with mechanical and structural properties that replicate those of normal tendon and ligament has so far not been identified. The use of demineralised bone for tendon reattachment onto bone has been shown to be effective in promoting the regeneration of a normal enthesis...
November 17, 2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27842571/medial-patellofemoral-ligament-reconstruction-using-a-bone-groove-and-a-suture-anchor-at-patellar-a-safe-and-firm-fixation-technique-and-3-year-follow-up-study
#5
Hong-De Wang, Jiang-Tao Dong, Shi-Jun Gao
BACKGROUND: Graft fixation is critical to the restoration of the medial patella of femoral ligament function and long-term success. Numerous fixations at the patella have been described, while the complications including patellar fractures, violation of the posterior patella and delay of tendon-to-bone healing remain significant challenges. Here, we describe a safe and firm fixation at the patellar for medial patellofemoral ligament (MPFL) reconstruction and explore the safety angle of drilling the suture anchor at different morphology of the patellar...
November 14, 2016: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/27833696/ultrasound-detection-of-patellar-fracture-and-evaluation-of-the-knee-extensor-mechanism-in-the-emergency-department
#6
Kiersten Carter, Arica Nesper, Laleh Gharahbaghian, Phillips Perera
Traumatic injuries to the knee are common in emergency medicine. Bedside ultrasound (US) has benefits in the rapid initial detection of injuries to the patella. In addition, US can also quickly detect injuries to the entire knee extensor mechanism, including the quadriceps tendon and inferior patellar ligament, which may be difficult to diagnose with plain radiographs. While magnetic resonance imaging remains the gold standard for diagnostic evaluation of the knee extensor mechanism, this can be difficult to obtain from the emergency department...
November 2016: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27829732/long-term-results-of-bone-patella-tendon-bone-acl-reconstruction
#7
Max Ettinger, Friedel Etter, Tilman Calliess, Michael Bohnsack, Christoph Becher
BACKGROUND: To assess outcomes of bone-patella-tendon-bone ACL-reconstruction at 18 years follow-up. MATERIAL AND METHODS: Outcome measures included the IKDC clinical examination form and clinical scores. Radiographs were analyzed to determine the grade of osteoarthritis. RESULTS: 69% of the examined patients (n = 54) had a normal/nearly normal knee, 14% were abnormal and 17% severely abnormal with significant improvement (P ≤ 0.001)...
March 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/27815584/surgical-options-for-chronic-patellar-tendon-rupture-in-total-knee-arthroplasty
#8
Alfredo Lamberti, Giovanni Balato, Pier Paolo Summa, Ashok Rajgopal, Attique Vasdev, Andrea Baldini
PURPOSE: The purpose of this study was to compare mid-term results of three different reconstructive techniques for chronic patellar tendon disruption after total knee arthroplasty (TKA). Several surgical techniques have been proposed, but to date it is still unclear which is the best solution. The hypothesis was that allografts provide better functional results than autografts in restoring a correct joint function. METHODS: Twenty-one reconstructions were performed in twenty-one patients (three groups of seven patients) with chronic patellar tendon lesion following TKA...
November 5, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27813020/new-insight-in-the-architecture-of-the-quadriceps-tendon
#9
Karl Grob, Mirjana Manestar, Luis Filgueira, Timothy Ackland, Helen Gilbey, Markus S Kuster
BACKGROUND: Published data regarding the structure of the quadriceps tendon are diverse. Dissection of the quadriceps muscle group revealed that beside the rectus femoris, vastus lateralis, vastus intermedius and vastus medialis a fifth muscle component- named the tensor vastus intermedius consistently fused into quadriceps tendon. It can be hypothesized that all these elements of the extensor apparatus of the knee joint must also be represented in the quadriceps tendon. This study investigated the multi-layered quadriceps tendon with special emphasis on all components of the quadriceps muscle group including the newly discovered tensor vastus intermedius...
December 2016: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/27810431/clinical-results-after-treatment-for-bidirectional-patellar-subluxation-minimum-2-years-follow-up
#10
Michael Saper, Candice Brady, Robert Zondervan, David Shneider
BACKGROUND: We describe the preliminary clinical results of a patellar stabilization technique to treat bidirectional patellar subluxation (BPS). METHODS: Patients: six patients (one male, five females; mean age 30.2years) underwent this procedure with a minimum of 24months follow-up. Patients were assessed for clinical instability, patellar complications, and need for revision surgery. Patient functional outcomes were evaluated using the criteria of Crosby and Insall and the Kujala Anterior Knee Pain Scale at the time of final follow-up...
December 2016: Knee
https://www.readbyqxmd.com/read/27798714/patellar-sleeve-fracture-with-ossification-of-the-patellar-tendon
#11
Derek S Damrow, Scott E Van Valin
Patellar sleeve fractures make up greater than 50% of all patellar fractures. They are essentially only seen in the pediatric population because of the thick periosteum and the distal patellar pole apophysis in this group. These fractures can lead to complications if not treated appropriately and in a timely fashion. Complications of missed or untreated patellar sleeve fractures include patella alta, anterior knee pain, and quadriceps atrophy. These can all result in severe limitations in activity. The authors describe a case of a 16-year-old boy who sustained a patellar sleeve fracture 3 years prior to presentation...
October 31, 2016: Orthopedics
https://www.readbyqxmd.com/read/27738741/three-dimensional-patellar-tendon-fibre-kinematics-in-navigated-tka-with-and-without-patellar-resurfacing
#12
C Belvedere, A Ensini, M d'Amato, P Barbadoro, A Leardini
PURPOSE: Physiological elongation and orientation of patellar tendon fibres are among the scopes of total knee arthroplasty, but little is known in the three dimensions. The study aims to assess in vitro these variations at the intact and replaced knee, with and without patellar resurfacing. It was hypothesised that fibre patterns differ before and after prosthesis implantation, and between specific prosthesis designs. It was also expected that patellar resurfacing would affect relevant results...
October 13, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27714843/acute-tendon-changes-in-intense-crossfit-workout-an-observational-cohort-study
#13
F Y Fisker, S Kildegaard, M Thygesen, K Grosen, M Pfeiffer-Jensen
CrossFit is a fitness program that has become increasingly popular in the Western world, but as in other sports, the risk of injury is present. Only a few studies have addressed health benefits and injuries in CrossFit. It is known that chronically overloaded tendons will thicken and increase the risk of tendinopathy. However, it remains unknown whether acute overload caused by strenuous, high-intensity exercise will exert changes in tendons and if these changes can be detected and described by ultrasonography...
October 7, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27692557/the-development-of-a-xenograft-derived-scaffold-for-tendon-and-ligament-reconstruction-using-a-decellularization-and-oxidation-protocol
#14
Thorsten M Seyler, Daniel N Bracey, Johannes F Plate, Mark O Lively, Sandeep Mannava, Thomas L Smith, Justin M Saul, Gary G Poehling, Mark E Van Dyke, Patrick W Whitlock
PURPOSE: To evaluate the biological, immunological, and biomechanical properties of a scaffold derived by architectural modification of a fresh-frozen porcine patella tendon using a decellularization protocol that combines physical, chemical, and enzymatic modalities. METHODS: Porcine patellar tendons were processed using a decellularization and oxidation protocol that combines physical, chemical, and enzymatic modalities. Scaffolds (n = 88) were compared with native tendons (n = 70) using histologic, structural (scanning electron microscopy, porosimetry, and tensile testing), biochemical (mass spectrometry, peracetic acid reduction, DNA quantification, alpha-galactosidase [α-gal] content), as well as in vitro immunologic (cytocompatibility, cytokine induction) and in vivo immunologic nonhuman primate analyses...
September 27, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27680889/efficacy-of-%C3%AE-tricalcium-phosphate-graft-into-the-bone-defects-after-bone-patellar-tendon-bone-anterior-cruciate-ligament-reconstruction
#15
Hiroshi Higuchi, Atsushi Kobayashi, Keiko Ikeda, Kazuhisa Hatayama, Sinya Yanagisawa, Kazuo Kato
This prospective pilot study investigated whether grafting β-tricalcium phosphate (B-TCP) into the bone-patellar tendon-bone (BPTB)-harvesting site after anterior cruciate ligament reconstruction would accelerate bone and tendon regeneration in the grafted site. Overall, 19 patients agreed prospectively to undergo regular morphological and histological examinations of the B-TCP-grafted site. Postoperative radiographic, ultrasonographic, and magnetic resonance imaging (MRI) examinations were performed to evaluate the grafted site at 1, 3, 6, and 12 months...
September 28, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/27672572/total-knee-arthroplasty-for-treatment-of-post-traumatic-arthritis-systematic-review
#16
Hesham Saleh, Stephen Yu, Jonathan Vigdorchik, Ran Schwarzkopf
AIM: To review and report functional outcomes, complications, and survivorship associated with total knee arthroplasty (TKA) in the treatment of post-traumatic arthritis (PTA). METHODS: We conducted a systematic review according to the PRISMA guidelines. We searched PubMed, Cochrane Library, and SCOPUS in December 2015 for English-language clinical research studies, both prospective and retrospective, examining the use of TKA for the treatment of PTA. All relevant articles were accessed in full...
September 18, 2016: World Journal of Orthopedics
https://www.readbyqxmd.com/read/27659171/influence-of-sagittal-plane-malpositioning-of-the-patella-on-anterior-knee-pain-after-tibia-intramedullary-nailing
#17
Ismail Turkmen, Yavuz Saglam, Fatih Turkmensoy, Bahattin Kemah, Adnan Kara, Koray Unay
PURPOSE: Anterior knee pain (AKP) is one of the most common complications after tibia intramedullary surgery. We evaluated changes in patellar tendon length after tibia intramedullary nailing surgery using a transtendinous approach and assessed the importance of nail position in relation to the anterior tibial cortex and joint line. METHODS: Two surgeons blinded to patients' pain status measured both the knee Insall-Salvati and Caton-Deschamps indexes on 30° flexion lateral knee X-rays of 33 patients...
September 22, 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/27625004/femoral-screw-divergence-via-the-anteromedial-portal-using-an-outside-in-retrograde-drill-in-bone-patella-tendon-bone-anterior-cruciate-ligament-reconstruction-a-cadaveric-study
#18
Jason Capo, Daniel J Kaplan, David J Fralinger, Soterios Gyftopolous, Eric J Strauss, Laith M Jazrawi, Michael J Alaia
PURPOSE: To assess screw divergence when inserting an interference screw for a bone-patellar tendon-bone graft using an outside-in technique with a retrograde drill to create the femoral tunnel. METHODS: Ten cadaver specimens underwent anterior cruciate ligament reconstruction with a bone-patellar tendon-bone autograft, with 23-mm-deep tunnels created by a retrograde drill outside-in technique. Drilling angles were based on a previous study that established the optimal angles to recreate the anterior cruciate ligament footprint...
September 10, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27600991/an-ultrasonographic-study-of-enthesis-in-early-psoriatic-arthritis-patients-naive-to-traditional-and-biologic-dmards-treatment
#19
Fabio Massimo Perrotta, Davide Astorri, Marcello Zappia, Alfonso Reginelli, Luca Brunese, Ennio Lubrano
The aim of this study was to evaluate the rate of power Doppler ultrasound (PDUS) abnormalities at entheseal sites in patients with early psoriatic arthritis (PsA) naïve to traditional and biologic DMARDs and to compare the PDUS findings with clinical examination. PsA patients with early disease and naïve to traditional and biologic DMARDs were consecutively enrolled in this study. Patients underwent PDUS examination of the following bilateral entheseal sites: common extensor tendon at its insertion at the lateral humeral epicondyle; quadriceps tendon at its insertion at the superior pole of the patella; patellar tendon at its insertion at the tibial tuberosity; medial collateral ligament at its proximal insertion and Achilles tendon at its insertion at the calcaneus...
November 2016: Rheumatology International
https://www.readbyqxmd.com/read/27600522/biomechanical-and-histological-comparison-between-the-cryopreserved-and-the-lyophilized-gracilis-tendon-allograft-for-mpfl-reconstruction-a-cadaveric-experimental-study
#20
Roberto Negrín, Jaime Duboy, Fernando Olavarría, Mauricio Wainer, Horacio Jimenez, Facundo Las Heras, Nicolas Reyes, Hugo Godoy
BACKGROUND: Medial patellofemoral ligament (MPFL) is the main restrictor of lateral shifting of the patella, contributing by 60 % in the first 20° flexion of the knee. MPFL reconstruction has been performed in order to restore the stability of the patella with good results.Lyophilized Gracilis tendon allograft (LGA) compared to Cryopreserved Gracilis tendon allograft (CGA) has a lower cost, does not require to maintain cooling chain or preparation. The purpose of this study is to compare the histological and biomechanical characteristics of an experimental model of reconstruction of the MPFL in porcine patellas with LGA versus CGA...
December 2016: Journal of Experimental Orthopaedics
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