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Inhalation Toxicity of Metal Particles and Vapors
Published in Jacob Loke, Pathophysiology and Treatment of Inhalation Injuries, 2020
Tantalum is used in the manufacture of capacitors and other electronic components, corrosion-resistant alloys for use in acid-proof chemical equipment, steel alloys, and in surgical and prosthetic appliances.
Reduction and Fixation of Sacroiliac joint Dislocation by the Combined Use of S1 Pedicle Screws and an Iliac Rod
Published in Kai-Uwe Lewandrowski, Donald L. Wise, Debra J. Trantolo, Michael J. Yaszemski, Augustus A. White, Advances in Spinal Fusion, 2003
Kai-Uwe Lewandrowski, Donald L. Wise, Debra J. Trantolo, Michael J. Yaszemski, Augustus A. White
Porous tantalum is of particular interest as an orthopedic and spinal implant material for several reasons. Macroscopically it has a fully interconnecting porous structure similar to cancellous bone. Its mechanical properties lie between those of cortical bone and cancellous bone for both its modulus of elasticity and its compressive strength, thus making it an ideal transitional material for bony interfaces (see Tables 1 and 2). It also has a high coefficient of friction against cortical and cancellous bone, which should reduce the possibility of implant displacement. Having a relatively low modulus of elasticity similar to cancellous bone should be favorable in reducing stress shielding and encouraging appropriate bone remodeling.
Stenting of the Femoropopliteal Artery
Published in Richard R Heuser, Giancarlo Biamino, Peripheral Vascular Stenting, 1999
Andrej Schmidt, Dierk Scheinert, Giancarlo Biamino
Strecker™ stents (MediTech, Boston Scientific, Natick, MA) are made of knitted tantalum wire and are balloon mounted for deployment as in the Palmaz™ stent. Tantalum is radiopaque, thus helping to ensure precise placement on balloon expansion. The Strecker™ stent usually shortens by approximately 10% with full expansion. Its flexibility allows for a contralateral placement using a crossover approach.
Advances in additive manufacturing processes and their use for the fabrication of lower limb prosthetic devices
Published in Expert Review of Medical Devices, 2023
Shaurya Bhatt, Deepak Joshi, Pawan Kumar Rakesh, Anoop Kant Godiyal
Various metals find their application in the field of additive manufacturing. Biocompatible stainless-steel alloys, namely, 304 and 316 L, are used in additive manufacturing processes [35]. Metals like titanium alloys, cobalt-chromium, and stainless steel are used in dental applications [36]. A study comparing cobalt chromium to cast cobalt chromium shows that additively manufactured cobalt chromium has superior properties to cast cobalt-chromium [35]. The research studied the corrosive effect of artificial saliva on the parts manufactured by AM process compared to the conventional manufacturing process. It was found that the formation of a martensitic structure imparts high strength to titanium alloy products produced by additive manufacturing [37]. Tantalum is also being used in the medical field to repair bone defects as it has similar characteristics to titanium [37]. A porous implant made of tantalum was fabricated using SLS to mimic the structure and texture of human bone [38]. A study conducted for static and dynamic fatigue testing of rat femur defect-shaped specimen concluded that fine porous tantalum structure produced by SLS process gave yield strength and elastic modulus in the range comparable to the cancellous bone in humans. The results also showed that the implant was osteoconductive as it showed 50% bone ingrowth into the bone defect and thus concluded that tantalum implants produced by SLS could prove an alternative to current implant fabrication techniques [39].
A finite element study of fatigue load effects on total hip joint prosthesis
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2021
Seyed Arvin Aghili, Kamran Hassani, Mohammad Nikkhoo
On the other hand, some other researcher investigated other aspects of hip prosthesis. For example, Ait Moussa et al studied how to minimize the stress shielding and cement damage of a hip prosthesis using computational design (Ait Moussa et al. 2017) or Messellek et al worked on material selection for different components of the hip joint prosthesis (Messellek et al. 2017). In another study, the strength of revision implants made of titanium or tantalum alloy, which can be used during bone reconstruction of a hip joint was evaluated (Skowronek et al. 2019). Up to now, most of the results in these investigations were mostly performed subjected to statics load assumption; however, the hip prosthesis is normally exposed to dynamic and cyclic loads during walking, jumping, and climbing. Therefore, it is required to study the biomechanical parameters of the hip prosthesis under fatigue loading, which could lead to fatigue failure. Hence, our main goal was to compare the life cycle of these different prostheses and predict which of the used materials is more reliable under fatigue loading. Moreover, we aimed to evaluate the von Mises stress distribution on the hip prosthesis with different materials and investigate the occurred deformations.
3D-printed porous tantalum: recent application in various drug delivery systems to repair hard tissue defects
Published in Expert Opinion on Drug Delivery, 2021
Long Hua, Ting Lei, Hu Qian, Yu Zhang, Yihe Hu, Pengfei Lei
Tantalum, as an inert metal, is used in various fields of medical treatment. Such as medical sutures, stents, screws, tantalum bars, porous metals. The elastic modulus of 3D-P-p-Ta is between cancellous bone and cortical bone, much lower than that of titanium alloy and cobalt-Chromium-molybdenum alloy. The pore size and porosity of 3D-P-p-Ta are close to human cancellous bone, which can effectively reduce the stress-shielding effect of implant materials. 3D-P-p-Ta also has the advantages of strong corrosion resistance, cellular behavior, and bone integration. On the topological level, 3D-P-p-Ta surface is more suitable for cell adsorption and growth, which is conducive to bone tissue growth. 3D-P-p-Ta prosthesis currently used has excellent clinical results, so it is considered as the most ideal orthopedic implant material at present.