Textile structures with bio-modular deformation behavior for intervertebral disc protheses / Robert Tonndorf in TECHNICAL TEXTILES, Vol. 67, N° 2 (2024)  

[article]  inTECHNICAL TEXTILES > Vol. 67, N° 2 (2024) . - p. 24-27 Titre : Textile structures with bio-modular deformation behavior for intervertebral disc protheses Type de document : texte imprimé Auteurs : Robert Tonndorf, Auteur ; Dilbar Aibibu, Auteur ; Thi Anh My Huynh, Auteur ; Mareen Warncke, Auteur ; Chokri Cherif, Auteur Année de publication : 2024 Article en page(s) : p. 24-27 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Couture Implants médicaux Implants orthopédiques Prothèse discale Textiles et tissus à usages médicaux Textiles et tissus à usages techniques Tissage en roseau ouvert Tissage tubulaire Tricot Index. décimale : 677.4 Textiles artificiels Résumé : The IGF project Spinetex laid the basis for the development of textile structures with bi-modular force-elongation behavior that have the potential to replicate the fibrous ring of biomimetic disc prostheses. To achieve the bimodular behavior of such structures, 3 textile technologies were investigated : stitching, open reed weaving (ORW), and tubular weaving with twines. Note de contenu : - Stitching - Open reed weave (ORW) - Tubular weaving - Fig. 1a : Schematic of the structure of alternating diagonal layers of yarns - Fig. 1b : Stitched samples with fixation elements on knitted fabric - Fig. 1c : Structure folded into a circular shape - Fig. 2 : Fabrication of structures using the ORW technique - Fig. 3 : Fabrication of a tubular structure ; expanding cylindrical structures having a viscoelastic core under compressive load - Fig. 4 : Bi-modular force strain curves of textile structures En ligne : https://drive.google.com/file/d/1K1Ihw6HFhuUIFgC-4XL8Aga2XD53U7Ir/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41086 [article]

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Wear outcomes of three models of disc prostheses with two bearing materials metal-on-metal and metal-on-polyethylene / Moussa Amadji in MATERIAUX & TECHNIQUES, Vol. 111, N° 4 (2023)  

[article]  inMATERIAUX & TECHNIQUES > Vol. 111, N° 4 (2023) . - 12 p. Titre : Wear outcomes of three models of disc prostheses with two bearing materials metal-on-metal and metal-on-polyethylene Type de document : texte imprimé Auteurs : Moussa Amadji, Auteur ; Hacene Ameddah, Auteur ; Hammoudi Mazouz, Auteur Année de publication : 2023 Article en page(s) : 12 p. Note générale : Bibliogr. Catégories : Alliages Polyéthylène à ultra haut poids moléculaire Prothèse discale Tags : 'prothèse  discale'  'Matériaux  du  roulement'  'Pression  de  contact'  'Distance  glissement'  'Volume  d’usure' Index. décimale : 668.4 Plastiques, vinyles Résumé : Wear of facet joints is a significant problem of disc replacement prostheses. We studied the wear behavior of the three models of disc prostheses in five cases, with two choices of bearing materials Metal-on-Metal (MoM) and Metal-on-Polyethylene (MoP). Our aim is to select the main factor that influences on the wear volume results of the disc prosthesis. An axial force of 2000 N combined by an angular displacement of 6° of flexion, 2° of lateral bending and 2° of axial rotation have been applied to the upper plate, the lower plate is still completely fixed. Cases that contain MoM (CoCrMo-on-CoCrMo) bearing materials produced less wear volume compared to the case with MoP (CoCrMo-on-Polyethylene) bearing materials. On the other hand the influence of two other parameters (contact area and nature of core) is low 8.71% between cases 2 and 4 (same bearing material MoP). Therefore, we can say that the three main factors influencing the wear volume are the choice of bearing materials followed by the contact area and the nature of the core (moving or fixed). The fifth case was therefore the model that produced less wear with more degrees of freedom. Note de contenu : - Geometry of disc prostheses - Materials selection - Wear analysis - Mesh generation - Boundary and load conditions - Table 1 : The main characteristics of the three models - Table 2 : Presentation of the technical situations of each case - Table 3 : The mechanichal characteristics of the biomaterials used in the simulations - Table 4 : Number of elements for each type - Table 5 : Volume wear under 2000N+ 6° of flexion Référence de l'article : 406 DOI : https://doi.org/10.1051/mattech/2023031 En ligne : https://www.mattech-journal.org/articles/mattech/pdf/2023/04/mt220022.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40506 [article]

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