Search results for "Tendon"
showing 10 items of 240 documents
Continuous Microfiber Wire Mandrel‐Less Biofabrication for Soft Tissue Engineering Applications
2022
Suture materials are the most common bioimplants in surgical and clinical practice, playing a crucial role in wound healing and tendon and ligament repair. Despite the assortment available on the market, sutures are still affected by significant disadvantages, including failure in mimicking the mechanical properties of the tissue, excessive fibrosis, and inflammation. This study introduces a mandrel-less electrodeposition apparatus to fabricate continuous microfiber wires of indefinite length. The mandrel-less biofabrication produces wires, potentially used as medical fibers, with different microfiber bundles, that imitate the hierarchical organization of native tissues, and tailored mechan…
Impact of oral contraceptive use and menstrual phases on patellar tendon morphology, biochemical composition, and biomechanical properties in female …
2013
Sex differences exist with regards to ligament and tendon injuries. Lower collagen synthesis has been observed in exercising women vs. men, and in users of oral contraceptives (OC) vs. nonusers, but it is unknown if OC will influence tendon biomechanics of women undergoing regular training. Thirty female athletes (handball players, 18–30 yr) were recruited: 15 long-term users of OC (7.0 ± 0.6 yr) and 15 nonusers (>5 yr). Synchronized values of patellar tendon elongation (obtained by ultrasonography) and tendon force were sampled during ramped isometric knee extensor maximum voluntary contraction to estimate mechanical tendon properties. Furthermore, tendon cross-sectional area and lengt…
The Patellofemoral Arthroplasty: The Great Solution, the Great Problem
2012
Unfortunately, many orthopedic surgeons believe that the definite solution for eliminating anterior knee pain in a young patient with multiple operations is the patellofemoral prosthesis (“The Great Solution”). But, they fail to ask themselves the most important question; what is causing the pain? When a patellofemoral prosthesis is implanted in these young patients without finding out the cause of the pain, a more serious problem could be created with a worse solution (“The Great Problem”). The cases we present spotlight this abuse.
The Relation Between Stretching Typology and Stretching Duration: The Effects on Range of Motion.
2018
AbstractDifferent stretching strategies and protocols are widely used to improve flexibility or maintain health, acting on the muscle tendon-unit, in order to improve the range of motion (ROM) of the joints. This review aims to evaluate the current body of literature in order to understand the relation between stretching typology and ROM, and secondly to evaluate if a relation exists between stretching volume (either as a single training session, weekly training and weekly frequency) and ROM, after long-term stretching. Twenty-three articles were considered eligible and included in the quantitative synthesis. All stretching typologies showed ROM improvements over a long-term period, however…
Genetic and other intrinsic factors influencing risk for elbow tendinopathy
2019
La tendinopatía es una enfermedad común que afecta a una gran proporción de la población, formando un 30% de las lesiones musculoesqueletales, y es el trastorno más prevalente del tendón. Se suele relacionar la tendinopatía del codo a un sobreuso crónico y movimientos repetitivos del mismo. No obstante, debido a la respuesta diferenciada entre individuos frente la misma carga externa, ha habido un aumento en los últimos años en investigaciones sobre factores de riesgo intrínsecos. A día de hoy, varios estudios han descrito la contribución de factores genéticos en las tendinopatías del Aquiles y de la patela, pero los estudios sobre los tendones del miembro superior son escasos, con unos poc…
CLINICAL AND NEUROPHYSIOLOGICAL FINDINGS IN 47 LONG-TERM SURVIVORS OF CHILDHOOD MALIGNANCIES TREATED WITH VARIOUS DOSES OF VINCRISTINE
1978
ABSTRACT 96 long-term survivors of cancer in childhood were reexamined after succesful therapy. In 49 who had not been treated with VINCRISTINE (VCR) reflex status and motor conduction velocities were normal. In contrast, 47-after treatment with VCR-had loss of deep tendon reflexes in a high rate and a prolongation of sensory CV independent of the 1 total cumulative dose of VCR, 2 application mode according to different treatment regimen, 3 time interval since the last injections of the drug, 4 age of children at onset of therapy.
Neuromuscular electrical stimulation leads to physiological gains enhancing postural balance in the pre‐frail elderly
2015
International audience; Physiological aging leads to a progressive weakening of muscles and tendons, thereby disturbing the ability to control postural balance and consequently increasing exposure to the risks of falls. Here, we introduce a simple and easy-to-use neuromuscular electrical stimulation (NMES) training paradigm designed to alleviate the postural control deficit in the elderly, the first hallmarks of which present as functional impairment. Nine pre-frail older women living in a long-term care facility performed 4 weeks of NMES training on their plantarflexor muscles, and seven nontrained, non-frail older women living at home participated in this study as controls. Participants w…
Terminal tendon cell differentiation requires the glide/gcm complex.
2004
International audience; Locomotion relies on stable attachment of muscle fibres to their target sites, a process that allows for muscle contraction to generate movement. Here, we show that glide/gcm and glide2/gcm2, the fly glial cell determinants, are expressed in a subpopulation of embryonic tendon cells and required for their terminal differentiation. By using loss-of-function approaches, we show that in the absence of both genes, muscle attachment to tendon cells is altered, even though the molecular cascade induced by stripe, the tendon cell determinant, is normal. Moreover, we show that glide/gcm activates a new tendon cell gene independently of stripe. Finally, we show that segment p…
Muscle-tendon morphomechanical properties of non-surgically treated Achilles tendon 1-year post-rupture
2022
Background\ud Achilles tendon rupture appears to alter stiffness and length of the tendon. These alterations may affect the function of tendon in force transmission and in energy storage and recovery. We studied the mechanical properties of the Achilles' tendon post-rupture and their association with function.\ud Methods\ud Twenty-four (20 males, 4 females) participants (mean age: 43 y, 176 cm, 81 kg) were recruited. Ultrasonography and dynamometry were used to assess the muscle-tendon unit morphological and mechanical properties of non-surgically treated patients 1-year post rupture.\ud Findings\ud Injured tendons were longer with difference of 1.8 cm (95%CI: 0.5–1.9 cm; P < 0.001), and th…
Proximal Tibiofibular Joint Reconstruction With Autogenous Semitendinosus Tendon Graft
2013
Isolated and chronic anterolateral instability of the proximal tibiofibular joint (TFJ) is an uncommon condition, generally linked to an unrecognized or unhealed dislocation of the TFJ. Clinically, abnormal anterior movement of the head of the fibula is detected. In acute injuries conservative management should be preferred, whereas surgical treatment have been advocated in patients with chronic TFJ instability. Authors describe a new surgical reconstruction technique for chronic instability of the proximal TFJ using an autogenous semitendinosus tendon. The graft is passed through fibular and tibia tunnels and fixed with 2 interference screws. The tibial tunnel is reamed from the posterolat…