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https://www.readbyqxmd.com/read/29234987/evaluation-of-microstructurally-motivated-constitutive-models-to-describe-age-dependent-tendon-healing
#1
Akinjide R Akintunde, Kristin S Miller
Tendon injuries are common to all ages. Injured tendons typically do not recover full functionality. The amount and organization of tendon constituents dictate their mechanical properties. The impact of changes in these constituents during (patho)physiologic processes (e.g., aging and healing) are not fully understood. Toward this end, microstructurally motivated strain energy functions (SEFs) offer insight into underlying mechanisms of age-dependent healing. Several SEFs have been adapted for tendon; however, most are phenomenological...
December 12, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29234649/total-bilateral-ruptures-of-the-knee-extensor-apparatus
#2
Diogo Lino Moura, José Pedro Marques, João Páscoa Pinheiro, Fernando Fonseca
Objective: Bilateral extensor tendon ruptures of the knee are rare and have only been published in the form of case reports or small series. Methods: Seven patients corresponding to 14 extensor tendon ruptures of the knee were evaluated by the same examiner after a minimum one year post-surgery. Clinical and radiographic evaluations were performed; for statistical analysis, the level of significance was set at 0.05. Results: The most common injury was patellar tendon rupture (n = 9; 64...
November 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/29234561/comparison-of-functional-activities-on-structural-changes-of-the-inferior-patellar-pole
#3
Kelli McKinney, Harvey Wallmann, Patrick Stalcup, Katie DiTommaso
Background: It is well known that eccentric and concentric exercise produce varied amounts of stress on the connective tissues. Diagnostic ultrasound has been used to measure these structural changes by observing fascicle length, angle, and thickness; however, there is a lack of evidence comparing the structural changes as it relates to eccentric, concentric, and stretching protocols. Purpose: The purpose of this study was to compare the acute effects of static stretching, eccentric, concentric, and a combination of eccentric/concentric exercises on structural changes of the muscle tendon unit at the inferior patellar pole utilizing the diagnostic ultrasound...
December 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29233691/enthesopathy-in-rheumatoid-arthritis-and-spondyloarthritis-an-ultrasound-study
#4
Esther Ebstein, Baptiste Coustet, Vanina Masson-Behar, Marine Forien, Elisabeth Palazzo, Philippe Dieudé, Sébastien Ottaviani
OBJECTIVE: We aimed to compare the prevalence of enthesopathy seen on ultrasonography (US) in spondyloarthritis (SpA) and rheumatoid arthritis (RA) and compared it to healthy controls. METHODS: All included patients with RA (2010 ACR/EULAR criteria) and SpA (ASAS criteria) and healthy controls underwent clinical and US evaluation of enthesis at seven sites (quadriceps, proximal and distal patellar, Achilles and triceps tendons, plantar aponeurosis and lateral epicondyle enthesis)...
December 9, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/29233153/application-of-different-patella-height-indices-in-patients-undergoing-total-knee-arthroplasty
#5
Bin Xu, Wei-Xing Xu, Di Lu, Hong-Feng Sheng, Xin-Wei Xu, Wei-Guo Ding
BACKGROUND: One complication of total knee arthroplasty (TKA) is patella baja (PB). Patellar tendon shortening and joint line elevation are two main causes of PB. The purpose of this study was to determine the incidence of PB before and after TKA by measuring the patellar height and provide evidence for choosing a suitable index. METHODS: In total, 256 consecutive patients who underwent primary TKA were included in this study. Radiographic measurements were performed; the Insall-Salvati (IS) index, modified IS (MIS) index, Blackburne-Peel (BP) index, and Caton-Deschamps (CD) index were computed; and the incidence of PB was calculated before and after the operation...
December 12, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29230426/lateral-patellofemoral-ligament-an-anatomic-study
#6
Kalpit N Shah, Steven F DeFroda, James Kristopher Ware, Sarath C Koruprolu, Brett D Owens
Background: Medial instability of the patellofemoral joint is a rare but known phenomenon that may result from an incompetent lateral patellofemoral ligament (LPFL). Surgical reconstruction of the LPFL has been described. However, anatomic details of the ligament have not been the subject of scrutiny. Purpose: To describe the anatomic origin and insertion of the LPFL. Study Design: Descriptive laboratory study. Methods: Ten fresh-frozen, unpaired human cadaveric knees (mean age, 57 years) were dissected to identify the LPFL...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29210775/isometric-exercise-to-reduce-pain-in-patellar-tendinopathy-in-season-is-it-effective-on-the-road
#7
Ebonie Rio, Craig Purdam, Michael Girdwood, Jill Cook
OBJECTIVE: To investigate the effectiveness of an isometric squat exercise using a portable belt, on patellar tendon pain and function, in athletes during their competitive season. DESIGN: Case series with no requirements to change any aspect of games or training. The object of this pragmatic study was to investigate this intervention in addition to "usual management." A control or sham intervention was considered unacceptable to teams. SETTING: In-season...
November 27, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29210196/ultrasonographic-detection-of-double-contour-sign-and-hyperechoic-aggregates-for-diagnosis-of-gout-two-sites-examination-is-as-good-as-six-sites-examination
#8
Danveer Bhadu, Siddharth K Das, Archana Wakhlu, Urmila Dhakad, Meha Sharma
OBJECTIVE: To compare ultrasound-detected abnormalities, namely double contour sign (DCS) and hyperechoic aggregates (HAGs), at two sites (knee and first metatarsophalangeal [1st MTP] joints) versus six sites (knee joint, 1st MTP joint, radiocarpal joint, talar joint, patellar tendon and triceps tendon) in gout patients. METHODS: Forty-seven clinically diagnosed gout patients and 50 subjects (serum uric acid < 7 mg/dL) as controls were included. DCS was looked for at three articular cartilage sites (first metatarsal, tibiotalar and femoral condyle), whereas HAGs were looked for at one joint site (radiocarpal joint) and two tendon sites (patellar tendon and triceps tendon)...
December 5, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29201913/proanthocyanidins-attenuation-of-h2o2-induced-oxidative-damage-in-tendon-derived-stem-cells-via-upregulating-nrf-2-signaling-pathway
#9
Wenshuang Sun, Jia Meng, Zhenheng Wang, Tao Yuan, Hong Qian, Wenxiang Chen, Jian Tong, Yu Xie, Ya Zhang, Jianning Zhao, Nirong Bao
Proanthocyanidins (PCs) have shown inhibition of oxidative damage by improving Nrf-2 expression in many tissues. However, the cytoprotective effects of PCs on H2O2-induced tendon damage have not been verified. The current study was aimed at assessing the cytoprotection of PCs on the oxidative cellular toxicity of tendon-derived stem cells (TDSCs) induced by H2O2. The TDSCs were isolated from patellar tendons of Sprague Dawley (SD) rats, and the cells after third passage were used for subsequent experiments...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29200662/gearing-effects-of-the-patella-knee-extensor-muscle-sesamoid-of-the-helmeted-guineafowl-during-terrestrial-locomotion
#10
V R Allen, R E Kambic, S M Gatesy, J R Hutchinson
Human patellae (kneecaps) are thought to act as gears, altering the mechanical advantage of knee extensor muscles during running. Similar sesamoids have evolved in the knee extensor tendon independently in birds, but it is unknown if these also affect the mechanical advantage of knee extensors. Here, we examine the mechanics of the patellofemoral joint in the helmeted guineafowl Numida meleagris using a method based on muscle and tendon moment arms taken about the patella's rotation centre around the distal femur...
November 2017: Journal of Zoology: Proceedings of the Zoological Society of London
https://www.readbyqxmd.com/read/29193888/associations-between-slower-walking-speed-and-t1%C3%AF-magnetic-resonance-imaging-of-femoral-cartilage-following-anterior-cruciate-ligament-reconstruction
#11
Steven Pfeiffer, Matthew S Harkey, Laura E Stanley, J Troy Blackburn, Darin A Padua, Jeffrey T Spang, Stephen W Marshall, Joanne M Jordan, Randy Schmitz, Daniel Nissman, Brian Pietrosimone
To determine if walking speed collected at 6 and 12 months following anterior cruciate ligament reconstruction (ACLR) associates with inter-limb differences in proteoglycan density, measured via T1ρ magnetic resonance imaging (MRI), in tibiofemoral articular cartilage 12 months following ACLR METHODS: Twenty-one individuals with a unilateral patellar-tendon autograft ACLR (10 females, 11 males, 23.9±2.7 years, 23.9±2.7 BMI) were recruited for participation in this study. Walking speed was collected using 3-dimensional motion capture at 6 and 12 months following ACLR...
November 28, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/29193343/response-to-considerations-on-achilles-and-patellar-tendinopathy-display-opposite-changes-in-elastic-properties
#12
Brooke Kaye Coombes, Kylie Tucker, Bill Vicenzino, Viana Vuvan, Rebecca Mellor, Luke Heales, Antoine Nordez, François Hug
We thank Wu (2017) and the editors for the opportunity to provide greater discussion on the association of tendon shear wave velocity (SWV) with potentially important covariates including sex and age. We would like to first clarify that we did not directly compare the Achilles and patellar tendinopathy groups. Instead, the (most) affected tendon from each tendinopathy group was compared with a matched tendon from the healthy control group. This article is protected by copyright. All rights reserved.
November 28, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29193329/a-few-considerations-on-achilles-and-patellar-tendinopathy-display-opposite-changes-in-elastic-properties
#13
Chueh-Hung Wu
I read with great interest the article by Coombes and colleagues1 , who utilized shear wave ultrasound elastography to measure shear wave velocity (SWV) of the patellar and Achilles tendons in those with patellar and Achilles tendinopathy. This article is protected by copyright. All rights reserved.
November 28, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29189619/bilateral-patellar-tendon-rupture
#14
(no author information available yet)
No abstract text is available yet for this article.
November 2017: Orthopaedic Nursing
https://www.readbyqxmd.com/read/29189618/bilateral-patellar-tendon-rupture
#15
Mary Kamienski
The knee is the most complex and largest joint in the body. Injuries to any part of this joint affect the entire body. There are multiple injuries that can occur to the knee, with the most common being ligament and meniscus tears. A not-so-common injury to the knee is a patellar tendon rupture. A bilateral patellar tendon rupture is extremely rare. A case study of a 43-year-old man who sustained a bilateral patellar tendon rupture while playing softball is used to present this devastating injury. This discussion includes the incidence and diagnosis of the tear, surgical repair, as well as a description of the comprehensive rehabilitation process necessary to allow the patient to return to normal physical activity...
November 2017: Orthopaedic Nursing
https://www.readbyqxmd.com/read/29186946/use-of-autologous-bone-marrow-cells-concentrate-enriched-with-platelet-fibrin-on-extensor-mechanism-allograft-reconstruction-for-extensor-mechanism-failure-following-total-knee-arthroplasty
#16
S Giannotti, P D Parchi, G B Colasanti, G Agostini, F Moreschini, C Cataldi, P Ferrata, R Capanna
Allografts techniques remain the best reconstructive strategy for chronic extensor mechanism lesions after total knee arthroplasty (3) but outcomes depend strictly on the host tissue-allograft junctions healing. The purpose of this study is to evaluate if modern techniques of adding autologous bone marrow cells concentrate enriched with platelet-rich fibrin, provide better healing of the allograft. We present the case of an 86 years old patient affected by patellar tendon rupture after TKA. A whole extensor mechanism allograft was performed adding a bone marrow cells concentrate enriched with platelet-rich fibrin on the host tissue-allograft junctions...
October 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29181559/compensation-after-treatment-for-anterior-cruciate-ligament-injuries-a-review-of-compensation-claims-in-norway-from-2005-to-2015
#17
Per-Henrik Randsborg, Ida Rashida Kahn Bukholm, Rune Bruhn Jakobsen
PURPOSE: To assess the most common reasons for complaints following anterior cruciate ligament (ACL) injuries reported to the Norwegian System of Patient Injury Compensation (NPE), and to view these complaints in light of the ACL reconstructions (ACL-Rs) reported to the Norwegian Knee Ligament Registry (NKLR). METHOD: Data from the NPE and the NKLR were collected for the study period (2005-2015). The age and gender and type of complaint and reason for granted compensation were collected from the NPE, while the graft choice and total number of ACL-R were collected from the NKLR...
November 27, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29174694/synergistic-promoting-effects-of-bone-morphogenetic-protein-12-connective-tissue-growth-factor-on-functional-differentiation-of-tendon-derived-stem-cells-and-patellar-tendon-window-defect-regeneration
#18
Kang Xu, Yanjun Sun, Mohanad Kh Al-Ani, Chunli Wang, Yongqiang Sha, Kl Paul Sung, Nianguo Dong, Xuefeng Qiu, Li Yang
Current study investigated bone morphogenetic protein 12 (BMP12) and connective tissue growth factor (CTGF) activate tendon derived stem cells (TDSCs) tenogenic differentiation, and promotion of injured tendon regeneration. TDSCs were transfected with BMP12 and CTGF via recombinant adenovirus (Ad) infection. Gene transfection efficiency, cell viability and cytotoxicity, tenogenic gene expression, collagen I/III synthesis were evaluated in vitro. For the in vivo study, the transfected cells were transplanted into the rat patellar tendon window defect...
November 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29170812/avulsion-fracture-of-an-ossified-pes-anserinus-tendon-post-lateral-patellar-dislocation
#19
Omar M Albtoush, Abtehag A Taib, Marius Horger, Fabian Springer
The pes anserinus is a common tendon comprising the tendinous insertions of the sartorius, gracilis, and semitendinosus muscles. It inserts at the anteromedial aspect of the tibia and plays a significant role in stabilization of the medial side of the knee joint. The current article presents a case with recurrent lateral patellar dislocations causing chronic stress along the medial knee stabilizers and consecutive enthesophyte formation at the insertion of the pes anserinus tendon that showed a transverse fracture upon a subsequent incident of traumatic lateral patellar dislocation...
November 23, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29164167/single-leg-hop-test-performance-and-isokinetic-knee-strength-after-anterior-cruciate-ligament-reconstruction-in-athletes
#20
Ted Sueyoshi, Akihiro Nakahata, Gen Emoto, Tomoki Yuasa
Background: Isokinetic strength and hop tests are commonly used to assess athletes' readiness to return to sport after knee surgery. Purpose/Hypothesis: The purpose of this study was to investigate the results of single-leg hop and isokinetic knee strength testing in athletes who underwent anterior cruciate ligament reconstruction (ACLR) upon returning to sport participation as well as to study the correlation between these 2 test batteries. The secondary purpose was to compare the test results by graft type (patellar tendon or hamstring)...
November 2017: Orthopaedic Journal of Sports Medicine
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