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Artykuły w czasopismach na temat "Bio-prothèse"
Higuchi, Fujio, Daisuke Tsuruta, Yumiko Ishibashi, Kazuko Imamura, Tokiko Shimoyama, Takahiro Ookawa, Shinichiro Kume i in. "Psoriasis Vulgaris Caused by Ceramic Inserts Used in Total Hip Replacement". Journal of Cutaneous Medicine and Surgery 16, nr 6 (listopad 2012): 448–50. http://dx.doi.org/10.1177/120347541201600618.
Pełny tekst źródłaRogier, F., F. Drissi, J. Podevin, E. Duchalais i G. Meurette. "Résultats anatomiques et fonctionnels de la rectopexie ventrale avec renfort par bio-prothèse pour trouble de la statique rectale". Journal de Chirurgie Viscérale 159, nr 4 (wrzesień 2022): S81—S82. http://dx.doi.org/10.1016/j.jchirv.2022.07.043.
Pełny tekst źródłaCurrat, D., C. Pichonnaz, J. P. Bassin, E. Martin i B. Jolles. "Validation de la mesure de l’œdème postopératoire par bio-impédance chez les patients opérés d’une prothèse totale de genou". Kinésithérapie, la Revue 9, nr 85-86 (luty 2009): 86–87. http://dx.doi.org/10.1016/s1779-0123(09)70746-6.
Pełny tekst źródłaRogier-Mouzelas, F., F. Drissi, J. Podevin, E. Duchalais i G. Meurette. "Résultats anatomiques et fonctionnels de la rectopexie ventrale avec renfort par bio-prothèse pour trouble de la statique rectale". Journal de Chirurgie Viscérale, grudzień 2022. http://dx.doi.org/10.1016/j.jchirv.2022.06.005.
Pełny tekst źródłaRozprawy doktorskie na temat "Bio-prothèse"
Casanova, Rémy. "Régénération osseuse : caractérisation biomécanique et bio-prothèse". Thesis, Aix-Marseille 2, 2010. http://www.theses.fr/2010AIX22093/document.
Pełny tekst źródłaThe first objective of our work was to experimentally characterise the temporal evolutionof the structural and mechanical properties of large volume immature regenerated tissues. Westudied these evolving tissues from their genesis in controlled mechanical conditions. To characterizethe temporal evolution of mechanical properties, based on animal model, we carried outindentation tests coupled with macroscopic examinations and histological studies. This combinedmethodology yielded a range of information on osteogenesis at different scales : macroscopic bysimple observation, mesoscopic by indentation test and microscopic by histological study. Resultsallowed us to identify different periods, providing a link between biological changes and materialproperty evolution in bone tissue regeneration. The regenerated tissue evolves from a viscous,homogeneous, soft material to a heterogeneous stiffer material endowed with a lower viscosity.From a biological point of view, cell organization progresses from a proliferated cell clot to a maturestructure closer to that of the bone. During the first seven days, mechanical and biologicalresults revealed the same evolution : first, the regenerated tissue grew, then, differentiated into anosteochondral tissue and finally calcification began. While our biological results confirm those ofother studies, our mechanical results provide the first experimental mechanical characterizationby reduced Young's modulus of such tissue.In a second time,we develop a bioprothesis with a biodegradebable biomaterial to regenerate acritical size bone defect. Our study is original because it proposes to use the biomaterial to initiatethe regeneration. A study was performed with an animal model and phosphocalcic ceramic.First observation gave some encouraging results but the clinical process should be realized
Jehl, Jean-Philippe. "Indentation instrumentée du tissu cardiaque : vers l’élaboration d’une bio-prothèse". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0033.
Pełny tekst źródłaDespite undeniable progress of the heart function understanding and in the improvement of medical and surgical techniques, ischaemic heart failure is still a major cause of death worldwide. New therapeutic approaches, such as regenerative medicine and tissue engineering are being developed to compensate or even replace damaged tissues. One of the attempts of tissue engineering is to reproduce as closely as possible the mechanical behavior of the tissue to be treated. In this thesis work, an approach linking the mechanical characterisation of healthy heart tissue with its microstructure was carried out. To this end and in order to avoid the degradation of the material properties due to its drying out and/or de-vascularisation, an experimental protocol was defined to perform the measurements in a context close to its physiological environment. The cardiac tissue was thus characterised through the estimation of Young's modulus in two main directions by spherical indentation. These results thus confirmed the anisotropic nature of the cardiac tissue. The search for the time limits for using the samples after collection (ex-vivo experimentation) enabled us to define a tissue rigidification kinetics which can be compared to the dating techniques used in forensic medicine. One perspective to this thesis work is the development of a passive substitute material in order to obtain membranes whose mechanical properties are close to those of cardiac tissue. On the basis of the mechanical characterization of the myocardium, a model of the mechanical behavior of a bio-prosthesis has been defined. A first membrane prototype has been produced and tested on small animals. These results were an essential step in the development of biomechanical assistance within the framework of a European ERDF ASCATIM project (2018-2021). Finally, a first transposition of the method developed for cardiac tissue was proposed for a biological material whose mechanical characteristics are unknown: cortical bone
Kirchhofer, Simon. "Conception d'une prothèse bio-inspirée commandée par réseaux de neurones exploitant les signaux électromyographiques". Thesis, Université Clermont Auvergne (2017-2020), 2020. http://www.theses.fr/2020CLFAC058.
Pełny tekst źródłaResearch on upper-body prosthetic device is commonly divided in two categories: The prosthesis mechatronic conception and the human-machine interface dedicated to the control. This PhD thesis aims to bring together these two fields of research. The first step deals with control signals. Thus, a database containing electromyographic sequences and vision based joint coordinate measurements was created. Then, an artificial neural network achieves the motion estimation from electromyographic sequences. Accordingly, an under-actuated bio-inspired hand architecture is proposed to copy an organic hand motion while ensuring a grasping force distribution. This innovative approach allows to optimize the synergies imitation and proposes a control more intuitive for active prosthesis users
Sananes, Véronique. "A propos de l'implant C. B. S. . Et de la lame de Linkow : historique, bio-intégration, prothèse, (cas cliniques)". Bordeaux 2, 1988. http://www.theses.fr/1988BOR20075.
Pełny tekst źródłaMick, Sébastien. "Motricité bio-inspirée d’un bras artificiel : vers l’intégration de coordinations motrices naturelles dans le contrôle d’une prothèse de membre supérieur". Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0117.
Pełny tekst źródłaIn humans, the loss of motor functions associated with the absence of part of the arm disrupts autonomy and reduces the ability to carry out tasks of daily life. To restore some of the lost functions, a person with the aforementioned upper limb disability can use a prosthesis which replaces the missing part of the arm. To this day, the most advanced prostheses measure the activity of muscles located in the stump to control their joints. However, a higher level of disability implies that the prosthesis must restore more motor functions with fewer available muscles from which command signals can be measured. In order to overcome this obstacle, this thesis explores how motor coordinations extit{i.e.} regularities in the way the different joints are put in motion, can be used to drive an arm prosthesis. With this aim, two experimental platforms were developed to act as substitutes for an actual prosthesis: a human-like robotic arm, and a simulated arm in a virtual reality setup. In a first experiment, this robotic arm is driven by able-bodied participants so that its endpoint reproduces the motion of their own hand. Based on a target-reaching task, this experiment compares how well participants perform with this control scheme in two distinct conditions. These conditions correspond to two different strategies to choose the robot's postures when placing its endpoint on the goal defined by the participant: rather human-like or biologically implausible. The results show that employing joint coordinations close to those of a human arm elicits better familiarization to the robot's control scheme. In a second experiment, able-bodied participants drive a virtual arm whose shoulder mimics the participant's actual shoulder motion while its distal joints (elbow and lower) are artificially controlled. Based on a pick-and-place task, this experiment compares how efficiently participants manage to drive the virtual arm with two distinct control schemes. One controls these distal joints' rotations solely from the actual shoulder's motion whereas the other uses additional information in the form of contextual, target-related data. The results reveal that including this contextual information notably improves the performance achieved during the task. Overall, these results show that natural joint coordinations provide a relevant source of information for the control of an arm prosthesis and can be combined with other types of command signals to further expand its motor functions. Regarding application to real-life prosthesis use, they provide insight for the design of control schemes employing natural motor coordinations to drive multiple joints simultaneously
Chaouat, Marc. "Bio-ingénierie de vaisseaux de petit calibre à base d'hydrogel". Paris 7, 2008. http://www.theses.fr/2008PA077051.
Pełny tekst źródłaVascular prostheses in polyethylene terephtalate (Dacron®) or in expanded polytetrafluoroéthylène (Gore-tex®) are usually used for bypass larger than 6 mm with good results. For small diameter bypass, autografts remain the best choice. This thesis describes the fabrication and the in vivo testing of small diameter hydrogel-based prostheses. Mechanical characteristics of rat aortas were determined as standards. Then, we designed a polysaccharide-based tubular prosthesis with a 2mm internal diameter using a mixture of pullulan/dextran polysaccharides crosslinked with sodium trimetaphosphate. The prosthesis, reinforced with a wrapped nylon mesh, was grafted into rats as replacement of the abdominal aorta. The graft, monitored with doppler and angiography, showed a good patency for up to 8 weeks. Histology revealed the formation of new tissue on the luminal face made of collagen, elastic fibers and smooth muscle cells. Then, the replacement of polysaccharides with polyvinyl alcohol (PVA) allowed the preparation of tubular hydrogels with enhanced intrinsic mechanical properties. The new prosthesis exhibited patency for up to one week as a replacement of rat abdominal aorta. Eventually, the association of polysaccharides and PVA could combine the advantages of both materials opening thus a promising research pathway for small diameter vascular grafts
Ayme, Jean-Claude, i Jacques Emery. "L'adhésion, élément de bio-intégration des prothèses totales : essais de modifications expérimentales de l'énergie de surface des bases prothétiques par des procédés de métallisation et des traitements physico-chimiques". Nancy 1, 1988. http://www.theses.fr/1988NAN10517.
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