Relevant bibliographies by topics / Prosthesis Materials

Academic literature on the topic 'Prosthesis Materials'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Prosthesis Materials"

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Silenko, B. Y., V. M. Dvornik, and Y. I. Silenko. "CONDITIONAL TISSUE CONDITION IN PATIENTS WITH PROSTHETIC DENTISTS IN THE PROCESS OF ORTHOPEDIC TREATMENT WITH PROSTHESES MODIFIED BY NANOMATER." Ukrainian Dental Almanac, no. 4 (December 8, 2021): 20–25. http://dx.doi.org/10.31718/2409-0255.4.2021.04.

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The main cause of prosthetic stomatitis belongs to the chemical and toxic action of the residual monomer of the prosthesis base, which is a protoplasmic poison. Occurrence of prosthetic stomatitis depends not only on quality of production of prosthesis in laboratory though at non-observance of technology indicators of residual monomer can reach 2-5%, but also at individual intolerance at its minimum concentration in a prosthesis after polymerization - 0,2-0 .5%. The aim of our study was to increase the effectiveness of orthopedic treatment of patients with prosthetic stomatitis by coating the plastic of removable prostheses with nanoscale materials. Materials and methods. To solve this goal, we studied the condition of the tissues of the prosthetic place of patients with prosthetic stomatitis with prosthetic removable prostheses with modified plastic. Orthopedic dental treatment of 50 people was examined and performed, including 25 people (the second group, prostheses were not covered with nanoparticles) and 25 people (the third group, prostheses were covered with nanoparticles). The first control group consisted of 10 people without signs of pathology. Prior to treatment, all patients had removable acrylic plastic dentures. The reason for seeking orthopedic care was a violation of masticatory function and the inability to use previously made prostheses due to the development of pain in the soft tissues of the prosthetic place. Complaints of pain were observed in all patients of varying intensity, impaired fixation and stabilization of the prosthesis due to swelling of the mucous membrane of the soft tissues of the prosthetic place, heartburn and dryness were observed in 90% of patients. Complaints were also about speech and aesthetic defects. Patients of III group after two weeks of using prostheses were coated with the inner surface of the prosthesis, which is in direct contact with the mucous membrane of the prosthetic place with molecules of fullerene C60, by magnetron sputtering. For this purpose, the prostheses were removed from the patients for several days and returned after the coating with the nanomaterial, after which the observation was continued. The results. After coating the prostheses in patients of group III with Fullerene C60, we observed the disappearance of inflammation of the mucous membrane under the prosthesis and patients noted the absence of discomfort. Рatients in II group had a negative dynamics in 80% and had diffuse inflammation of the mucous membrane under the prosthesis. Within 3 months of use, 18 patients (72%) in II group reported that they stopped using removable dentures during the day, due to unpleasant pain under the prosthesis, and used only during meals and during conversations. In contrast to II group, patients in III group did not notice discomfort when using plate prostheses. Conclusions. Obtained in the course of the work convincingly prove the effectiveness of the use of removable plate prostheses with nanocoating for the treatment and prevention of prosthetic stomatitis in patients. This is evidenced by the data of objective examination and the disappearance of complaints from patients.
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Mohammed, Salsabil karim. "Design and Manufacturing of a New Prosthetic Foot." Journal Port Science Research 4, no. 2 (December 8, 2021): 109–15. http://dx.doi.org/10.36371/port.2020.2.8.

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All prosthetic foot designs, adapted in common use, don't imitate the specific qualities of a typical human foot. The premise of this task is to explore current prosthetics so as to plan and assemble a more human like prosthesis. In attempted such a structure, the new prosthesis will show a more extensive scope of qualities than those showed in current prosthetic feet. In doing as such, the new prosthesis will give a closer portrayal of the capacities inalienable to an ordinary human foot. The qualities associated with ordinary strolling incorporate dorsiflexion foot test. The qualities showed in the produced new foot tried are contrasted with those of" SACH foot". The qualities showed by prostheses which compared well with those of a human foot were researched further. Another prosthetic foot is structured and made from composite random E-glass-polyester. The premise of the new prosthetic plan consolidates current prosthetic structure components, such as, prosthetic materials and segments. The scientific part presents the aftereffects of the static investigation by techniques, such as, mathematical strategies (Finite Element method FEM) and experimental methods. Thus the new foot was designed and dorsiflexion were measured. The new prosthetic foot has a good characteristics when compared with the SACH foot, such as good dorsiflexion (7°-6.4°) respectively.Prosthetic foot
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Alvarez-Camacho, Michelin, Victor Alvarez-Guevara, Carlos Galvan Duque Gastelum, Daniel Flores Vazquez, Gerardo Rodriguez-Reyes, and Francisco Manuel Sanchez-Arevalo. "Use of three-dimensional digital image correlation to evaluate mechanical response of prosthetic systems." Prosthetics and Orthotics International 41, no. 1 (July 10, 2016): 101–5. http://dx.doi.org/10.1177/0309364616637956.

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Background and aim:The need of comfortable and safe prosthetic systems is an important challenge for both prosthetists and engineers. The aim of this technical note is to demonstrate the use of three-dimensional digital image correlation to evaluate mechanical response of two prosthetic systems under real patient dynamic loads.Technique:This note describes the use of three-dimensional digital image correlation method to obtain full-field strain and displacement measurements on the surface of two lower limb prostheses for Chopart amputation. It outlines key points of the measurement protocol and illustrates the analysis of critical regions using data obtained on specific points of interest.Discussion:The results show that the use of three-dimensional digital image correlation can be a tool for the prosthetist to optimize the prosthesis considering features related to the material and design, in order to bear with real patient-specific load conditions.Clinical relevanceThree-dimensional digital image correlation can support decision-making on new designs and materials for prosthetics based on quantitative data. Better understanding of mechanical response could also assist prescription for appropriate prosthetic systems.
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Haroun, Feras, and Oguz Ozan. "Evaluation of Stresses on Implant, Bone, and Restorative Materials Caused by Different Opposing Arch Materials in Hybrid Prosthetic Restorations Using the All-on-4 Technique." Materials 14, no. 15 (August 1, 2021): 4308. http://dx.doi.org/10.3390/ma14154308.

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The long-term success of dental implants is greatly influenced by the use of appropriate materials while applying the “All-on-4” concept in the edentulous jaw. This study aims to evaluate the stress distribution in the “All-on-4” prosthesis across different material combinations using three-dimensional finite element analysis (FEA) and to evaluate which opposing arch material has destructive effects on which prosthetic material while offering certain recommendations to clinicians accordingly. Acrylic and ceramic-based hybrid prosthesis have been modelled on a rehabilitated maxilla using the “All-on-4” protocol. Using different materials and different supports in the opposing arch (natural tooth, and implant/ceramic, and acrylic), a multi-vectorial load has been applied. To measure stresses in bone, maximum and minimum principal stress values were calculated, while Von Mises stress values were obtained for prosthetic materials. Within a single group, the use of an acrylic implant-supported prosthesis as an antagonist to a full arch implant-supported prosthesis yielded lower maximum (Pmax) and minimum (Pmin) principal stresses in cortical bone. Between different groups, maxillary prosthesis with polyetheretherketone as framework material showed the lowest stress values among other maxillary prostheses. The use of rigid materials with higher moduli of elasticity may transfer higher stresses to the peri implant bone. Thus, the use of more flexible materials such as acrylic and polyetheretherketone could result in lower stresses, especially upon atrophic bones.
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Yan, Gongxing, Jialing Li, Hui Xie, and Minggui Zhou. "Adaptive Control System of Intelligent Lower Limb Prosthesis Based on 5G Virtual Reality." Wireless Communications and Mobile Computing 2022 (March 18, 2022): 1–12. http://dx.doi.org/10.1155/2022/4572503.

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With the rapid development of computer science and technology in our country, especially the advent of the 5G network era, the emergence of smart prostheses makes it possible for disabled, injured, or amputee people with lower limbs to walk and exercise like normal people. However, due to the different selection of prosthetic materials, the final lower limb prostheses produced will also have different performance differences. How to select prosthetic materials to optimize the performance of the intelligent lower limb prosthesis is the focus of extensive discussion in the medical community. For this reason, this article takes the research of the adaptive control system of intelligent lower limb prosthesis based on 5G virtual reality as the research object. By using the current advanced 5G communication technology and virtual reality technology, a high-performance intelligent lower limb prosthesis is produced. Provide assistance with basic walking and motor abilities in daily life of patients with lower limb disabilities. This article first gives a systematic theoretical introduction to 5G virtual reality technology, expounds the current status of patients with lower limb disabilities, and proposes to use intelligent lower limb prosthetics to replace healthy lower limbs to solve the basic walking and sports needs of disabled patients in daily life and then use 5G virtual reality technology. The selection of human knee joints and ankle joints and structural system design were carried out. Finally, it was decided to use the four-bar linkage structure as the knee joint structure of the three-dimensional modeling of the intelligent lower limb prosthesis. At the end of this article, the application and simulation of the intelligent lower limb prosthesis to the human body were also carried out. The results of the experiment found that after 45 weeks of wearing exercises, the gait of the intelligent lower limb prosthesis is consistent with the expected effect whether it is walking on level ground and up and down the stairs or uphill. Due to the strong adaptiveness of the intelligent lower limb prosthesis sexual control, it can well assist the basic life movement ability of patients with lower limb disabilities.
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Refaai, Mohamad Reda A., Ashraf Elfasakhany, P. Rajalakshmy, Bikash Chandra Saha, A. S. Prakaash, and Dadapeer Basheer. "Utilization of Flex Controlled Robotics on Prosthetic Hand instead of Damaged Body Parts." Advances in Materials Science and Engineering 2022 (August 9, 2022): 1–7. http://dx.doi.org/10.1155/2022/3496122.

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Scientists have researched human anatomy and biology to produce human-like prosthetic hands. In the absence of a hand, prosthetics assist in reestablishing independence and confidence. Prosthetic hands are limited in functionality and cost. A low-cost anthropomorphic prosthetic hand was designed. With five independently operated fingers and powered thumb roll movement, the design is unlike anything else on the market. This research aims to provide a cheaper alternative to the market’s robotic prostheses. Inability to use limbs causes psychological and physical issues for amputees. Arduino, an open-source microprocessor, was used to build a prototype prosthetic hand. An Android app allows users to select a hand motion to circumvent myoelectric prosthesis control mechanisms. The Arduino uses this data to power servos that individually trigger each finger.
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Sahoo, Ullas Chandra, and Smruti Prava Sahoo. "Indigenous Socket Adapter for Endoskeletal Trans Radial Prosthesis." International Journal of Health Sciences and Research 12, no. 4 (April 19, 2022): 264–68. http://dx.doi.org/10.52403/ijhsr.20220430.

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Most of the upper extremity transradial prosthesis consists of exoskeletal system which makes the prosthesis comparatively heavy and also takes more time for fabrication. Current designs of commercial arm prostheses do not support a modular approach. The purpose of this study was to design and develop a low cost socket attachment unit for endoskeletal transradial prosthetic system (ranging from very short below elbow to wrist disarticulation) which will help in increasing and decreasing the length of the forearm bar (pylon) of the prosthesis easily as per the requirement. The socket adapter was made from aluminium alloy with internal threading of M12*1.75. As the wrist unit was eliminated and light weight materials were used for fabrication of prosthesis, the weight of the prosthesis was about 0.506 kg as compared to 1 kg for conventional prosthesis. After fitting the prosthesis, patient was able to open the terminal device at any desired elbow flexion and wrist position. The novel socket adapter design will allow the Endoskeletal idea to be used in the construction of upper limb prostheses. Key words: Transradial prosthesis, Endoskeletal, Modular, Socket adopter, Aluminium alloy.
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Wang, Chunchun. "Haunted by the past: transformations and daily challenges of China's prosthetics." Asian Education and Development Studies 10, no. 1 (August 4, 2020): 115–24. http://dx.doi.org/10.1108/aeds-03-2020-0051.

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PurposeThe purpose of this paper is to examine the transformations of prosthetic practices in China, as well as the daily experiences and dilemmas arising from the everchanging practices since 1949. On the basis of materials, this paper explores an everyday perspective to review the history of technology.Design/methodology/approachEthnography was collected with the application of participant observations, informal interviews and in-depth interviews during a 13-months study at a rehabilitation center in Chengdu, China. The literature on prosthetic manufacturing was also reviewed for this paper.FindingsChina's prosthetic technology seems to evolve from traditional to modern. However, this progressive narrative – innovation-based timeline (Edgerton, 2006, xi) – has been challenged by daily practices. Due to institutional pressures, prosthetists are in a dilemma of selectively using their knowledge to create one kind of device for all prosthesis users with a certain kind of disability, thereby regulating the physical and social experiences of prosthesis users. Besides, prosthesis users are accustomed to prostheses made with old techniques, and must correct themselves from old experiences to the daily practices recognized by the selected techniques.Originality/valueThis paper provides a cross-cultural case to reexamine Edgerton's criticism of the progressive and orderly innovation-centric technological narrative. More importantly, it reviews the history and practices of China's prosthetics from daily experiences rather than Edgerton's concentration on technology; therefore, it provides an everyday perspective for future research on technological transformations.
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Cho, Hyo-Joung, and Min-Shin Kim. "Comparison and Applicability of Facial Prosthetic Ear Manufacturing Cases." Journal of the Korean Society of Cosmetology 28, no. 6 (December 31, 2022): 1206–15. http://dx.doi.org/10.52660/jksc.2022.28.6.1206.

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As a result of synthesizing the advice of experts in facial prosthetics, customized prosthetics for special cosmetics, and medical device manufacturing and sales experts, work competencies that require '3D printing based on digital work methods' are required. It was confirmed that 'prosthesis production, 3D scanning and modeling, and 3D printing' skills are required for work competency. In order to develop a more realistic aesthetic part, more attention and research are being made on the production of implants, and prosthetic manufacturers are developing materials that can extend the durability, practicality, and aesthetic life of the material. Observe the case of the human prosthesis production ear and examine the case of ear production application technology using 3D printing of facial prosthesis with special makeup. Through interviews with three face prosthetic manufacturers, we would like to explore the usefulness of facial prosthetics and ways to utilize them through collaboration with special cosmetics in the art world.
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Seçilmiş, Aslı, and A. Nilgün Öztürk. "Nasal Prosthesis Rehabilitation after Partial Rhinectomy: A Clinical Report." European Journal of Dentistry 01, no. 02 (April 2007): 115–18. http://dx.doi.org/10.1055/s-0039-1698324.

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ABSTRACTFacial defects resulting from neoplasms, congenital malformations, or trauma can be restorated with facial prostheses using different materials and retention methods to achieve a lifelike look and function. For the successful result, a lot of factors as harmony, texture, color matching, and blending of tissue interface of prosthesis is important. This clinical report describes treatment using a silicone prosthesis with a mechanical - retentined design for a patient who received a partial rhinectomy. Defects resulting from diseases as squamous cell carcinoma can be managed with the prosthetic rehabilitation so that the patient more comfortably and confidently resumed regular daily activity. Mechanical retention alone was sufficient to retain the prosthesis; thus, prosthetic adhesives were not necessary. (Eur J Dent 2007;2:115-118)
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Dissertations / Theses on the topic "Prosthesis Materials"

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Lordeus, Makensley. "Enhanced Flexible Materials for Valve Prosthesis Applications." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2315.

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While mechanical, homograft and bio-prosthetic valves have been used in patients for many decades and have made significant improvements in patient morbidity, there is still a distinct need to overcome their limitations. Recently, emerging elastomer heart valves have been shown to be able to better re-create the flow physics of native heart valves, resulting in preferable hemodynamic responses. Unfortunately, elastomers such as silicone are prone to structural failure, which drastically limits their applicability towards the development of valve prosthesis. In order to produce a mechanically more robust silicone substrate, we reinforced it with graphene nanoplatelets (GNPs). Cytotoxicity and hemocompatibility tests revealed that the incorporation of GNPs did not adversely affect cell proliferation or augment adhesion of platelets on the surface of the composite materials. The ECM valves showed good hydrodynamic properties and favorable acute performance compared to a commercially available valve. We conclude that both the Graphene reinforce silicone and the ECM is useful and warrants further evaluation as aortic valve substitutes.
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Irsale, Swagat Appasaheb Adanur Sabit. "Textile prosthesis for vascular applications." Auburn, Ala., 2004. http://hdl.handle.net/10415/953.

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Martín, Vilardell Anna. "Functionalized coatings by Cold Spray for joint prosthesis." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/400484.

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The Cold Spray (CS) is a novelty technique for the production of coatings within the field of Thermal Spray. The use of low work temperatures (under the melting point of the material) is what makes it different from the other conventional spraying techniques. CS is an ideal technique to spray materials that are sensitive to temperature, such as nanostructured and amorphous materials, or sensitive to the oxygen, as could be titanium. These characteristics may be specially promising within the field of biomedical coatings. Compared to the conventional processes, it would allow to produce coatings in a more cost-effect and environmental friendly way. The research is mostly focused on the obtaining of highly rough Commercial Pure Titanium (CP-Ti) and Calcium Phosphate (CP) coatings by CS for joint prosthesis application. An exhaustive development of coating parameter optimization has been developed and the different deposition mechanisms for each feedstock powder were analyzed as well. The mechanical and biological properties of the optimal coatings were evaluated consequently. The mechanical testing (e.g. Tensile and shear strength test and Taber test), was performed on the optimized CP-Ti coating overcoming the ASTM standard specifications for joint, shoulder and knee prosthesis; CP-Ti coating showed good bonding between particles as well with the substrate. The used of coarse titanium particles provided high roughness (Ra=40±12 µm and Rz=235±44 µm) that shows an increase in cell viability, proliferation and differentiation as well as mineralization, in comparison with a low-roughness titanium surface obtained by Sand Blasted (SB).Afterwards, additional surface modification procedures were investigated to obtain nanotextured surfaces on the as-sprayed CS titanium coatings to evaluate their in-vitro response for comparison. The anodic oxidation treatment leads to a TiO2 Nanotube (NT) layer with a pore diameter between 50-100 nm and a roughness of Ra=36.8±4.6 nm, whereas the alkaline treatment leads to a nanosurface of Ra=1.2±0.2nm, composed by very fine porosity <100nm. The nanotextured treatments lead to an increase of cell viability in comparison with the as-sprayed CP-Ti coating as well as high cell differentiation due to its nanofeatures. On the other hand, Hydroxyapatite (HA) coatings were well-deposited by CS without amorphization. Two different HA powders were used as feedstock, a sintered HA powder with a crystalline microstructure, and agglomerate HA feedstock powder with a nanocrystalline microstructure. Both powders show different deposition by CS according to their microstructure; particle deposition of sintered HA powder occurred by slight void collapse and dynamic fragmentation followed by cracking and crushing and reduction in crystal size by plastic deformation mechanisms, whereas agglomerate HA powder a consolidation between particles is caused by the tamping effect produced by the continuous impact of incoming particles onto the already adhered ones, leading to coating build up. Although sintered HA coatings show high cell differentiation, agglomerated HA coatings result in higher cell viability and proliferation, as well as a more homogeneous cell deposition along the coating; agglomerate HA coatings were compared to HA coatings obtained by conventional techniques (e.g. Plasma Spray), and an increase of cell viability and proliferation were observed according to the crystalline HA percentage (CS>PS). To sum up, CS has shown to be suitable to produce metallic and ceramic coatings for joint applications, especially those dealing with materials that are sensitive to the temperature and oxygen. The non-microstructural changes from the feedstock powder to the coatings leads to a big advantage in CS to obtain customized coatings.
La Proyección Fría o también conocida por el nombre de Cold Spray (CS), es una técnica muy novedosa para la obtención de recubrimientos en el ámbito de la proyección térmica. El uso de bajas temperaturas de trabajo (siempre por debajo del punto de fusión del material) es lo que la hace diferente respecto al resto de técnicas convencionales, ya que la hace ideal para depositar materiales sensibles a la temperatura (ej. Materiales nanoestructurados y amorfos) o reactivos al oxígeno (ej. Titanio). Además tiene un gran potencial a nivel económico y ambiental por ser un proceso eficiente y respetuoso con el medio ambiente. La investigación se basa principalmente en la obtención de recubrimientos de titanio rugoso y fosfato cálcico mediante proyección fría, donde se han estudiado los diferentes mecanismos de deposición de las materias primas y se ha elaborado un estudio a nivel mecánico y biológico. Además, se han realizado tratamientos adicionales sobre los recubrimientos de titanio para obtener superficies nanotexturizadas y poderlas comparar in vitro. El uso de partículas gruesas de titanio facilita la obtención de grandes rugosidades superficiales en los recubrimientos de titanio, mejorando así la viabilidad y proliferación celular, al igual que la diferenciación y mineralización celular, en comparación a superficies con bajas rugosidades (como las superficies de titanio granalladas). Aun así, los tratamientos de nanotexturización, tales como el anodizado (donde se obtuvieron nanotubos de TiO2 con un diámetro entre 50-100nm) y el tratamiento alcalino (en el cual se obtuvieron porosidades <100nm), promovieron aún más la respuesta celular de los recubrimientos de titanio en los aspectos previamente mencionados. Por otra parte, los recubrimientos de hidroxiapatita (HA), se depositaron por CS sin ninguna amorfización. También se observó que el proceso de obtención de la HA influía en la deposición de la partícula. La deposición de una HA sinterizada ocurre mediante el colapso de poros y fragmentación dinámica de la partícula, reduciendo así el tamaño de cristal por mecanismos de deformación plástica. Por el otro lado, el polvo de HA obtenido mediante aglomeración, se deposita mediante la compactación y consolidación entre partículas, pudiendo hacer crecer la capa. In vitro, la HA sinterizada da una mayor diferenciación celular, mientras que la HA aglomerada da una mayor viabilidad y proliferación celular. Los recubrimientos de HA aglomerada fueron comparados con los que actualmente se producen por proyección de plasma, y se observó una mejor respuesta celular en los recubrimientos obtenidos por CS debido a que no ofrece cambios microestructurales en el polvo de partida. Para resumir, el CS es una técnica idónea para la producción de recubrimientos metálicos y cerámicos para prótesis articulares, especialmente con materiales sensibles a la temperatura y al oxígeno. Al no producirse un cambio microestructural en el recubrimiento durante el proceso de su obtención, permite la elaboración de recubrimientos personalizados.
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Mathias, Martin J. "Development of an optimum acetabular cup prosthesis." Thesis, Bournemouth University, 2004. http://eprints.bournemouth.ac.uk/433/.

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The aim of this researchis to use advanced materials and state of the art Finite Element Analysis to produce a novel acetabular cup prosthesis. An investigation into current static and fatigue testing procedures for acetabular cup prostheses has identified current strengths and weakness and proposes a cheap, fast method that is closer to anatomical loading conditions. The current trend of performing Total Hip Replacements(THR) on younger patients incurs an increasing number of revisions. Therefore, prolonging the life of a THR is of paramount importance and is the principal goal of this study. With this trend comes a new set of design goals driven by higher patient expectations of their THR. Younger patients not only require increased longevity from their prosthesis but also increased performances so as to be able to undertake more strenuous everyday activities, such as sports. Historically, the main objective of THR was to relieve pain and increase quality of life in the elderly and was not intended for young active patients. Previous research proposes that the acetabularcup design has far more impact on long-term survival of the THR than the femoral component. Optimising the acetabular cup prosthesis produces a highly complex problem where many of the individual design factors have massive impact on the system. A main aim is to develop a material or combination of materials to optimise the stress distribution in the system without sacrificing the service life of the THR. Of the 800,000 hip replacements carried out annually, many of the current acetabular cups have some form of polyethylene bearing surface. However, polyethy lenewear debris is seen as a major contributing factor to bone resorption and hence prosthesis loosening. Changes in stress values, even caused by initial primary fixation during the operation, can result in stresses being transferred in an unrealistic manner. The effect is that the bone grows to differing thickness and strengths. This is known as remodelling. For optimisation of the acetabular cup, the properties of the natural hip must be retained by minimising both remodelling and bone resorption. The present research, with collaboration from Orthodynamics Ltd., has produced novel composite acetabular cup prostheses with a ceramic on ceramic bearing surface that should last longer and perform better, thus reducing the necessity for costly and debilitating revisions later on in life. In addition, the use of the proposed novel anatomically orientated mechanical testing methods gave fast,cheap results and could also allow further research into fatigue failure of alumina bearing couples in THR.
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Heying, Jamie John Gratton David G. "Flexural strength of interim fixed prosthesis materials after simulated function." [Iowa City, Iowa] : University of Iowa, 2009. http://ir.uiowa.edu/etd/377.

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Heying, Jamie John. "Flexural strength of interim fixed prosthesis materials after simulated function." Thesis, University of Iowa, 2009. https://ir.uiowa.edu/etd/377.

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Statement of Problem There are limited studies evaluating the effect of a cyclic load on interim fixed prosthetic materials and its effect on flexural strength. Purpose of Study 1) To verify the flexural strength of previously studied interim fixed prosthetic materials. 2) To establish the flexural strength of new, advanced generation and untested interim fixed prosthetic materials. 3) To determine the effect of cyclic load on the flexural strength of interim fixed prosthetic materials. Materials and Methods Bar-type specimens of Caulk Temporary Bridge Resin, VitaVM CC, Protemp 3 Garant and Radica were fabricated according to International Standards Organization 4049 and American National Standards Institute/American Dental Association specification 27. After being stored in distilled water for 10 days, specimens were divided into Noncycled and Cycled Groups. The Noncycled Group specimens were fractured under a 3-point loading in a Bose Electroforce 3300 testing instrument at a crosshead speed of 0.75 mm/min. Cycled Groups specimens underwent a 6-12 Newton 3 Hertz cyclic load for 20,000 cycles in a Bose Electroforce 3300 testing instrument. Immediately following completion of the cycles, the specimens were fractured under a 3-point loading. Maximal loads to fracture in Newtons were recorded and mean flexural strengths were calculated (n = 20 per group). Comparisons were made with analysis of variance and Tukey's Multiple Comparison Test. Results Noncycled (NC) and Cycled (C) groups order of mean flexural strengths (MPa) from lowest to highest mean were as follows: Caulk (Noncycled - 53.83; C - 60.02), Vita VM CC (NC - 65.96; C - 66.83), Protemp 3 Garant (NC - 75.85; C - 77.18), and Radica (NC - 106.1; C - 115.96). In the Noncycled and Cycled groups, Radica was statistically superior when compared to all materials and Protemp 3 Garant was statistically superior to Caulk Temporary Bridge Resin. There was no statistically significant difference between the material's flexural strengths before and after cycles. Conclusion Within the limitations of this study, 20,000 cyclic loads of 6-12 Newtons at 3 Hertz did not have a significant effect on the flexural strength of interim fixed prosthetic materials. Radica demonstrated significantly superior flexural strength over other materials tested.
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Macnair, R. "A biocompatibility study of orthopaedic materials with primary and immortalised osteoblast-like cells derived from rat and human tissue." Thesis, University of Strathclyde, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266231.

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Anissian, H. Lucas. "In vitro evaluation of hip prostheses /." Stockholm, 2001. http://diss.kib.ki.se/2001/20010420anis/.

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Marchiori, André Vinícius. "Reação exotérmica e expansões de presa e térmica de revestimentos frente às técnicas de fundição convencional e rápida /." Araçatuba : [s.n.], 2007. http://hdl.handle.net/11449/105583.

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Orientador: Eulália Maria Martins da Silva
Banca: Wirley Gonçalves Assunção
Banca: Paulo Henrique dos Santos
Banca: Osvaldo Luiz Bezzon
Banca: Paulo Martins Ferreira
Resumo: Os protocolos estabelecidos numa técnica de fundição objetivam compensar a contração de solidificação da liga metálica e obter estruturas metálicas fundida com adequada adaptação cervical. A técnica de fundição rápida tem demonstrado ser uma alternativa, mas há dúvidas sobre como os revestimentos se expandem. Este estudo comparou as expansões de presa, térmica e total de três revestimentos odontológicos perante os procedimentos realizados em técnicas de fundição convencional e rápida. Na primeira parte desse estudo, determinaram-se as curvas das expansões resultantes da reação exotérmica de presa (n=5/revestimentoXtécnica), juntamente com as curvas de temperaturas que permitiram determinar o pico da exotermia e o intervalo médio requerido por cada revestimento para atingí-lo e; na segunda parte, aferiu-se a expansão térmica (n=3/revestimento). Para a análise estatística, utilizou-se o ANOVA e o Teste de Tukey (p<0,05). O maior valor médio de temperatura durante a presa foi determinado para o revestimento Micro Fine 1700 (88oC), que não diferiu estatisticamente do Heat Shock (80,3oC) e o menor, para o All Therm (67oC). O Micro Fine 1700 foi o que atingiu seu pico máximo de temperatura mais precocemente (5,8min), seguido pelo Heat Shock (16,4min) e o All Therm (18,8min), sendo todos diferentes entre si (p<0,05). Pôde-se constatar que os três revestimentos avaliados atingiram seus respectivos picos de temperatura num tempo menor ou igual a 20 minutos. Quanto à expansão de presa, para os revestimentos fosfatados foi muito menor no tempo de 20 minutos (tempo de espera para presa na técnica de fundição rápida) em comparação ao que se obteve com 60 minutos; o que não ocorreu, estatisticamente, para o revestimento cerâmico Micro Fine 1700. Só o revestimento cerâmico Micro Fine 1700 apresentou sua expansão de presa estabilizada aos 20 minutos.
Abstract: The protocols established in casting techniques aimed to compensate the solidification contraction of metallic alloy and to get casting metallic structures with accurate marginal fit. The accelerated casting technique has demonstrated to be an alternative, but some doubts regarding investment expansion remains. This study compared the curves of temperatures resultant setting expansion and expansions of setting, thermal and total of three dental investments before the conventional and accelerated casting techniques. In the first part of this study, the curves of the resultant expansion of the setting exothermic reaction (n=5/investment) were determined, together with the curves of temperatures. Based on theses temperatures curves either the maximum exothermic setting reaction temperature, and the mean time interval required for each investment were calculated. In the second part, thermal expansion (n=3/investmentXtechnique) was analyzed. ANOVA and Tukey Test were used as a statistic analysis at 5% level of significance. Micro Fine 1700 investment showed the highest temperature values during the setting (88oC), and did not differ significantly from the Heat Shock (80.3oC) (p>.05). All Therm exhibited lower values (67oC) that differed from the two other investments (p<.05). Micro Fine 1700 reached the maximum exothermic setting reaction temperature first (5.8min), followed by Heat Shock (16.4min) and All Therm (18.8min) (p<.05). It can be evidenced that the three investments had reached their temperature peak until 20 minutes. The setting expansions of the phosphate bonded investments were very lower in the time of 20 minutes (wait time for setting in the accelerated casting technique) in comparison to 60 minutes. However, this difference did not occur to Micro Fine 1700 ceramic investment (p>.05). Analyzing thermal expansion, only Heat Shock showed statistic difference regarding technique factor.
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Prado, Rodrigo Diniz do. "Efeito do envelhecimento em baixa temperatura e desgaste no comportamento mecânico de uma cerâmica Y-TZP com duas espessuras diferentes indicada para restauração monolítica /." São José dos Campos, 2016. http://hdl.handle.net/11449/148775.

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Orientador: Luiz Felipe Valandro
Coorientador: Marco Antonio Bottino
Banca: João Paulo Barros Machado
Banca: Guilherme de Siqueira Ferreira Anzaloni Saavedra
Resumo: O objetivo deste estudo foi avaliar o efeito do desgaste com broca diamantada, o envelhecimento (degradação em baixa temperatura) e espessura do material cerâmico no comportamento mecânico de uma cerâmica Y-TZP. Para este estudo, 240 espécimes foram fabricados em formato de disco, de acordo com a norma ISO 6872: 2008 para resistência à flexão biaxial de amostras de cerâmica (N = 120, com dimensões de 0,5 mm de espessura x 15 mm de diâmetro; N = 120 com a dimensão 1,0 milímetros de espessura x diâmetro 15 mm). Os espécimes foram divididos aleatoriamente em 8 grupos (n = 30), de acordo com três fatores em estudo: 'desgaste' em 2 níveis (com e sem desgaste com broca diamantada), o envelhecimento em 2 níveis (com e sem envelhecimento) e da espessura da cerâmica também em 2 níveis (0,5 a 1,0 mm). O desgaste foi realizado com uma broca diamantada montada em um motor de baixa rotação associado a um contra-ângulo multiplicador de velocidade (T2 REVOR R170, Sirona, Bensheim, Alemanha), sob constante irrigação de água. O envelhecimento foi simulado em uma autoclave à temperatura de 134 °C, durante um período de 20 horas, sob pressão de 2 bar. Após o desgaste e envelhecimento, análises de rugosidade e topográficas foram realizadas e análises de transformação de fase por difração de raios-X. Os dados coletados foram submetidos à análise de Weibull. O desgaste promoveu um aumento da rugosidade, enquanto que o envelhecimento em autoclave não afetou estatisticamente a rugosidade da superfíc... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The goals of this investigation were to evaluate the effects of grinding with diamond bur and aging (low temperature degradation) on the mechanical behavior of a fullcontour Y-TZP ceramic with two thicknesses. Y-TZP shaped-disc specimens (Zirlux FC, Ardent Dental) were manufactured with thickness of 0.5 mm and 1.0 mm (both with 15 mm in diameter). The specimens from every thickness were randomly assigned into 4 groups, according to two factors: 'grinding' on 2 levels (with and without grinding with diamond bur), aging in 2 levels (with and without aging). Grinding was performed with a diamond bur mounted in a slow speed rotation motor associated with a counter-angle speed multiplier hand-piece, under constant watercooling. Low temperature aging was performed in an autoclave at 134°C temperature, for a period of 20h, under 2 bar of pressure. After grinding and aging, roughness analyzes were performed on a surface roughness tester and 3D digital optical profilometer; topographic analysis were made in a scanning electron microscope; phase transformation analysis by X-ray diffraction. Biaxial flexural strength tests were performed in the universal testing machine. Specific statistical analyses were carried out (Weibull analysis for the strength data). Grinding promoted an increase in roughness, while aging in autoclave did not affect statistically the surface roughness. Also, grinding and aging lead to higher values of m-phase content, although, grinding lead to a decrease in the material susceptibility to a new phase transformations during aging (after aging, as-sintered condition resulted in higher m-phase content compared with ground). Independent on the zirconia's thickness, aging in autoclave and grinding led to an increase in characteristic strengths. Within the limits of this study, it was observed that: grinding and low ...(Resumo completo, clicar acesso eletrônico abaixo)
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Books on the topic "Prosthesis Materials"

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Lunsford, Thomas R. Strength of materials in orthotic and prosthetic design. Alexandria, VA: American Academy of Orthotists and Prosthetists, Inc., 1996.

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Greisler, Howard P. New biologic and synthetic vascular prostheses. Austin: R.G. Landes Co., 1991.

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Ram, Kossowsky, Kossovsky Nir, and North Atlantic Treaty Organization. Scientific Affairs Division., eds. Materials sciences and implant orthopedic surgery. Dordrecht: M. Nijhoff, 1986.

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Helmus, Michael Nevin. Outlook for biomedical materials. Burlington, Mass: Decision Resources, 1990.

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Sonntag, Robert, and Jan Philippe Kretzer. Materials for total joint arthroplasty: Biotribology of potential bearings. New Jersey: Imperial College Press, 2015.

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B, Heimke, Soltész U. 1940-, Lee, A. J. C., 1938-, and European Society for Biomaterials, eds. Clinical implant materials: Proceedings of the Eighth European Conference on Biomaterials, Heidelberg, F.R.G., September 7-9, 1989. Amsterdam: Elsevier, 1990.

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service), SpringerLink (Online, ed. Degradation of Implant Materials. New York, NY: Springer New York, 2012.

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Medical moulage: How to make your simulations come alive! Philadelphia: F.A. Davis, 2012.

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G, Gebelein Charles, American Chemical Society Meeting, and American Chemical Society. Division of Polymeric Materials: Science and Engineering., eds. Advances in biomedical polymers. New York: Plenum Press, 1987.

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1956-, Jacobs Joshua J., Craig Thomas L. 1947-, and Symposium on Alternative Bearing Surfaces in Total Joint Replacement (1997 : San Diego, Calif.), eds. Alternative bearing surfaces in total joint replacement. West Conshohocken, PA: ASTM [American Society for Testing and Materials], 1998.

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Book chapters on the topic "Prosthesis Materials"

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Rabiei, Afsaneh. "Hip Prosthesis." In Biomedical Materials, 349–69. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-84872-3_13.

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Szakal, Z., Ibolya Zsoldos, and Z. Csernátony. "Design and Manufacturing Process of Skull Defect Prosthesis." In Materials Science Forum, 641–44. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-962-8.641.

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Kofoed, Hakon. "A New Total Ankle Joint Prosthesis." In Materials Sciences and Implant Orthopedic Surgery, 75–84. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4474-9_6.

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Camacho-Tapia, Nayeli, Juan Alfonso Beltrán-Fernández, Mauricio Gonzalez-Rebattú-y González, Luis Héctor Hernández-Gómez, Pablo Moreno-Garibaldi, Guillermo Urriolagoitia-Calderón, and Daniel López-Liévano. "Numerical Study in Biomodels of Maxillofacial Prosthesis (Cancer and Osteonecrosis Cases)." In Advanced Structured Materials, 59–72. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07383-5_5.

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Hernández-Gómez, Luis Héctor, Joel Francisco Pava-Chipol, Martín Trejo-Valdez, Carlos Torres-Torres, Juan Alfonso Beltrán Fernández, Guillermo Urriolagotia-Sosa, Christopher René Torres San Miguel, and Guillermo Urriolagotia-Calderón. "Strain Measurements Exhibited by a Steel Prosthesis Protected with Au Nanoparticles." In Advanced Structured Materials, 107–20. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07383-5_9.

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D’Amato, Roberto, Roque Calvo, Massimiliano Merola, Petr Valášek, and Miroslav Müller. "Dimensional Characterization of Prosthesis Bearings for Tribological Modelling." In Advances in Manufacturing Engineering and Materials, 195–204. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99353-9_21.

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Pugh, James, and Carol Stanis. "Z-τ: Solid Metal Direct Skeletally-Attached Prosthesis." In Materials Sciences and Implant Orthopedic Surgery, 211–21. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4474-9_16.

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Sweet, Ryan. "“The Infurnal Thing”: Autonomy and Ability in Narratives of Disabling, Self-acting, and Weaponized Prostheses." In Prosthetic Body Parts in Nineteenth-Century Literature and Culture, 73–125. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78589-5_3.

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AbstractFocusing on the themes of agency and ability, this chapter examines the power play at work between person and prosthetic part in various nineteenth-century imaginaries. The chapter draws from mechanical and materialist understandings of the human body and attitudes to automatic machines to place literary and cultural representations within wider historical contexts pertaining to ability, autonomy, and wholeness. Exploring the extent to which artificial body parts were seen to enhance or assume the agency of the user, the chapter argues that a range of prosthesis narratives produce transgressive prosthesis users or false body parts that threaten the dominance of the physically whole. It investigates three key tropes: narratives of disabling, self-acting, and weaponized prostheses.
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Beltrán-Fernández, Juan Alfonso, Eduardo Romo-Escalante, Francisco López-Saucedo, Pablo Moreno-Garibaldi, Luis Héctor Hernández-Gómez, Guillermo Urriolagoitia-Calderón, and Nayeli Camacho-Tapia. "Biomechanical Assembled Prosthesis of a Temporo Mandibular Joint Disorder Using Biocompatible Materials." In Advanced Structured Materials, 135–46. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07383-5_11.

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Beltrán-Fernández, Juan Alfonso, Mauricio González Rebattú y. González, Luis Héctor Hernández-Gómez, Alejandro Gonzalez Rebatú y. González, and Guillermo Urriolagoitia Calderón. "Biomechanical Prosthesis Design of an Orbicular Cranial Cavity." In Advances in Bio-Mechanical Systems and Materials, 87–94. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00479-2_7.

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Conference papers on the topic "Prosthesis Materials"

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Regalla, Srinivasa Prakash, Kirange Piyush Prashant, Harshal Vinayak Dhake, and Prakash Narayan Shrivastava. "Analysis of Liner Deformation Behaviour in Transtibial Prosthesis." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-71483.

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Abstract The problems associated with the prostheses for transtibial amputees are related mainly to fit and comfort. There has been a steady effort to improve the below-knee prosthesis’s wearability, stability, and durability. The liner in the below-knee prosthesis plays a crucial role in ensuring these quality characteristics. Isotropic liner material either acts hard and results in discomfort or deforms too much and results in eventual loosening of the prosthetic socket. The material hyper-elastic behavior and thickness are both critical in the design of the liner with optimum comfort. A generalized deformation model considers the interaction of the socket, liner, muscle, and tissue becomes cumbersome. In the literature, numerous hyper-elastic models have been applied. However, studies on the suitability and application of hyper-elastic materials for liner material have not been sufficiently carried out. In this paper, the usefulness of liner materials in terms of their ability to allow sufficient elastic deformation in the normal direction for the cushioning effect while undergoing limited shear deformation has been investigated. The hyper-elastic liner and rigid socket pair have been idealized as adhesively bonded flat layers of suitable thicknesses subjected to various normal and shear load combinations. The deformations for a normal load and varied range of shear loads have been compared to conclude on the best-suited material model. The low shear deformation observed for all three liner materials implies that the shear loading will not affect the adhesive bond between the liner and socket and hence will not cause loosening with prolonged usage of the prosthetics. The deformation observed was maximum with Ogden 3-parameter hyper-elastic model, whereas it was least in the case when Mooney Rivlin 3-parameter hyper-elastic model. The results obtained for the Mooney-Rivlin 3-parameter model and Neo-Hookean model are very close to each other.
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Mehta, Bhavin V., and Robert J. Setlock. "Improved Prosthetic Bone Implants." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43048.

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An improved method for manufacturing prosthetic bones is examined. We are developing a new improved method for designing and manufacturing prosthetic bones that have a porous interior core covered by a solid outer shell, more closely matching the morphology of natural bone. The new method is compatible with a wide variety of materials, including polymers, metals, composites, and biodegradable scaffold materials. Use of biodegradable scaffold material holds the potential for eventual bone regeneration within and throughout the prosthesis. Regardless of the material selection, this improved type of prosthesis is expected to more closely mimic the overall material and structural properties of natural bone, including shape, strength, weight, and weight distribution. By fabricating prosthetic bones that duplicate the material and structural properties of natural bone, implants could be made to operate as precision replacements, feeling and functioning exactly like natural bone. In addition to improving patient comfort, these new prostheses are expected to reduce the occurrence of unnatural secondary wear patterns caused by current style prosthetic bones that function in unnatural fashions due to their non-matching material and structural properties.
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Regalla, Srinivasa Prakash, Kirange Piyush Prashant, Harshal Vinayak Dhake, and Prakash Narayan Shrivastava. "Analysis of Liner Deformation Behaviour in Transtibial Prosthesis." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23002.

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Abstract The problems associated with the prostheses for transtibial amputees are related mainly to the fit and comfort. There has been a steady effort to improve the wearability, stability, and durability of the below-knee prosthesis. The liner in the below-knee prosthesis plays a crucial role in ensuring these quality characteristics. Isotropic liner material either acts hard and hence result in discomfort or deforms too much and results in eventual loosening of the prosthetic socket. The material hyper-elastic behavior and thickness are both critical in the design of the liner with optimum comfort. A generalized deformation model taking into account the interaction of the socket, liner, muscle, and tissue becomes cumbersome. In the literature, numerous hyper-elastic models have been applied. Studies on suitability and application of hyper-elastic materials for liner material has not been sufficiently carried out. In this paper, the suitability of liner materials in terms of their ability to allow sufficient elastic deformation in the normal direction for the cushioning effect while undergoing limited shear deformation has been investigated. The hyper-elastic liner and rigid socket pair have been idealized as adhesively bonded flat layers of suitable thicknesses subjected to various combinations of normal and shear loads. The deformations for a normal load and varied range of shear loads have been compared to conclude on the best-suited material model. The low shear deformation observed for all three liner materials implies that the shear loading will not affect the adhesive bond between the liner and socket and hence will not cause loosening with prolonged usage of the prosthetics. The deformation observed was maximum with Ogden 3-parameter hyper-elastic model, whereas it was least in the case when Mooney Rivlin 3-parameter hyper-elastic model. The results obtained for the Mooney-Rivlin 3-parameter model and Neo-Hookean model are very close to each other.
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Legoux, J. G., M. Bureau, and G. Priscillia. "Hydroxyapatite Coating of Biomimetic Polymer Composite Materials." In ITSC2005, edited by E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2005. http://dx.doi.org/10.31399/asm.cp.itsc2005p1109.

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Abstract One of the largest successes of modern medicine is the total hip replacement. Presently this procedure has one of the highest success rate among surgical interventions, only second to the appendix removal procedure. However the lifetime of the prosthesis itself is still limited to 10 to 20 years, which means that for numerous patients replacement of the procedure will become mandatory. This replacement finds its origin in aseptic loosening of the prosthesis mainly caused by the formation of wear particles at articular joints and by the difference in stiffness between the bone and the metallic prosthesis leading phenomena called stress shielding. To overcome this problem, new designs of more biomimetic prostheses, with stiffness similar to that of cortical bone, are being studied. Among the latter, a novel design based on polymer composite materials of total hip replacement prosthesis is under development. One of the key characteristics of this biomimetic prosthesis is its hydroxyapatite coating, which permits Osseo integration (integration into the bone). Thermally sprayed hydroxyapatite coatings are already used successfully for metallic implants, but plasma sprayed hydroxyapatite coatings have yet to be developed for polymer composites due to quite challenging heat management and adhesion concerns. This paper describes and discusses the optimization of the plasma sprayed technique and the formation of the adequate underlayer enabling the plasma spray on highly heat sensitive substrate. Adhesion, shear and fatigue results are presented.
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Vlaisavljevich, Eli, Logan P. Janka, Keat G. Ong, and Rupak M. Rajachar. "Magnetoelastic Materials as Novel Bioactive Coatings for Bone Anchored Prostheses." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206406.

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Enhanced fibroblast activity at the implant-soft tissue interface is a key concern to the long-term success of many implanted biomaterials. Uncontrolled fibrosis has been shown to dramatically decrease the stability, function, and lifespan of biomedical implants. Fibrosis, defined as the overgrowth of various tissues about the implant, is caused by the excess synthesis of extracellular matrix components, primarily collagen, and often leads to walling off and hardening (calcification) of tissues at the biomaterial interface (1). Fibrosis is currently a major deterrent to stable bone anchored prostheses. These bone anchored mounting systems are designed to surgically attach a prosthesis mounting post directly into a patient’s bone. The attached post protrudes from the bone through the overlying soft tissue of the amputated limb providing an external connection point for the prosthetic. Although the bone anchoring system dramatically improves prosthetic limb mechanical stability, uncontrolled fibrosis at the soft tissue-mounting post interface is a significant problem (2). The fibrosis caused from aberrant cellular growth leads to the formation of irregular skin folds that prevent proper sealing to the bone anchoring post and also serves as a site for opportunistic infection and failure of the prosthetic system.
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Devlin, D., D. Carroll, R. Barbero, J. Klawitter, P. Strzepa, and W. Ogilive. "Carbon Based Prosthetic Devices." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0330.

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Abstract The medical profession has a need for improved orthopedic devices and biomaterials. The replacement of knee and hip joints with metallic prosthetic devices has provided mobility to many elderly patients suffering from bone diseases. Unfortunately, metal prostheses, anchored with methyl methacrylate cement, have a useful life of 7 to 10 years. Bond failure and wear necessitates an entire replacement of the prosthesis. Bone resorption due to the presence of the implant limits the number of implant operations to two per patient. As a consequence joint replacement is restricted to patients over age 55. A definite need exists for a new material system for extending the expected life of these prosthetic devices for younger patients. The long term objective of this research is to greatly extend the service life of prosthetic devices, specifically artificial joints. A materials system approach is being employed to accomplish this objective. The two specific materials technologies being integrated in this proposed study are carbon/carbon composites and diamond-like carbon (DLC) coatings.
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Mercier, Melina, Corin Shirley, Shelby Stafford, Sydney Hitzke, Achu Byju, Chris Kevorkian, Michael Madigan, and Michael Philen. "Fluidic Flexible Matrix Composites for Volume Management in Prosthetic Sockets." In ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7706.

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Persons with transfemoral and transtibial protheses experience changes in the volume of their residual limb during the course of the day. These changes in volume unavoidably lead to changes in quality of fit of the prosthesis, skin irritations, and soft tissue injuries. The associated pain and discomfort can become debilitating by reducing one’s ability to perform daily activities. While significant advancements have been made in prostheses, the undesirable pain and discomfort that occurs due to the volume change is still a major challenge that needs to be solved. The goal of this program is to develop smart prosthetic sockets that can accommodate for volume fluctuations in the residual limb. In this research, fluidic flexible matrix composite wafers (f2mc) are integrated into the prosthetic socket for volume regulation. The f2mc’s are flexible tubular elements embedded in a flexible matrix. These tubular elements are connected to a reservoir, and contain an internal fluid such as air or water. Fluid flow between the tubes and reservoir is controlled by valves. The f2mc’s can achieve more than 300% increase in volume and potentially several orders of magnitude of change in stiffness. Experimental results for a prosthetic socket demonstrate that the flexible matrix composite wafers can achieve changes in volume when pressurized.
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Shkel, Andrei M. "An electronic prosthesis mimicking the dynamic vestibular function." In Smart Structures and Materials, edited by Masayoshi Tomizuka, Chung-Bang Yun, and Victor Giurgiutiu. SPIE, 2006. http://dx.doi.org/10.1117/12.659293.

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de Bastos, Talita P., José R. Galvão, Cicero Martelli, and Jean Carlos Cardozo da Silva. "Smart Carbon Fiber Foot Prosthesis." In Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/bgppm.2018.jtu2a.17.

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Sharma, Gulshan B., Douglas D. Robertson, Patrick J. Smolinski, Richard E. Debski, and Patrick J. McMahon. "Effects of Glenoid Prosthesis Design Variables on Glenoid Bone Remodeling: A Finite Element Based Simulation and Validation Study." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192993.

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Finite element (FE) analysis has been used to improve glenoid prosthesis design. One of the major complications of shoulder arthroplasty has been glenoid prosthesis loosening. Design improvements are needed to increase their longevity [1]. Current FE analyses have used static or non-linear solutions to compare design variations with respect to stresses in the glenoid bone and prosthesis [2, 3]. Previous numerical models have not incorporated Wolff’s Law of adaptive bone remodeling to simulate normal glenoid bone remodeling or remodeling in response to implanted glenoid prostheses. Of the numerous remodeling simulation theories available in the literature, this study controlled internal structure remodeling using bone strain-energy. In order to design longer lasting glenoid prosthesis bone remodeling behavior due to various prosthesis fixation geometries and materials needs to be considered.
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Reports on the topic "Prosthesis Materials"

1

Park, Christina Soyeun. Characterizing the Material Properties of Polymer-Based Microelectrode Arrays for Retinal Prosthesis. Office of Scientific and Technical Information (OSTI), June 2003. http://dx.doi.org/10.2172/15005368.

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Cajas, María Augusta, Marcela Cabrera, Jaime Astudillo, Yulissa Abad, and Daniela Astudillo. Accuracy in marginal and/or internal adaptation of full-coverage fixed prostheses made with digital versus conventional impressions: an overview of systematic reviews and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, October 2021. http://dx.doi.org/10.37766/inplasy2021.10.0024.

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Review question / Objective: Is the accuracy (marginal adaptation and / or internal adaptation) of fixed full coverage prostheses made with digital impressions better than conventional impressions? Eligibility criteria: Inclusion criteria• Systematic reviews and / or meta-analyzes that evaluated the precision (marginal adaptation and / or internal adaptation) of full coverage fixed prostheses on natural teeth in clinical studies and on tooth replicas in in vitro studies.• Systematic reviews and / or meta-analyzes comparing digital impressions with an intraoral scanner versus conventional impressions taken with any impression material.• Systematic reviews and / or meta-analyzes of randomized clinical trials (RCTs), prospective comparative and in vitro and non-randomized clinical trials.Exclusion criteria:• Systematic literature reviews, case reports, pilot studies• Studies evaluating the seating of crowns on implants and partial restorations• Studies with no response from the author to the requested information query.
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