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Dissertations / Theses on the topic 'Implantable material'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

VAN, WINKLE MICHAEL G. "PYROLYTIC CARBON STUDY AS AN IMPLANTABLE MATERIAL FOR A LEFT VENTRICLE ASSIST DEVICE." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1085776125.

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2

Ehsan, Dina. "Stress-free titanium-based thin films for inner ear microphones : The last missing part of a technology for totally implantable hearing aid implants." Thesis, Linköpings universitet, Tunnfilmsfysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-169705.

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An implantable hearing aid device is being developed by a project group which is part of an EU initiative. This device contains a diaphragm consisting of a submicron thick freestanding titanium film, which should be free of internal stresses. Stress is the force exerted per unit cross-sectional area of the film and it can impair the functionality and performance of the device. The stress that evolves in a thin film during deposition at a substrate is compressive or/and tensile and affects the bending that occurs of the substrate due to the lateral force applied to the substrate by the stressed

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3

Jacob, Dolly. "Investigation into reliability and performance of an implantable closed-loop insulin delivery device." Thesis, De Montfort University, 2014. http://hdl.handle.net/2086/11126.

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An implantable closed-loop insulin delivery device (INsmart device) containing a glucose responsive gel has been developed within the INsmart research group, over a period of 10 years, to mimic pancreas. In this thesis, the reliability and performance capability of the INsmart device was studied for future clinical use. Investigations into the device material compatibility with insulin solution, assessed by monitoring insulin loss and degradant formation over a period of 31 days using RP-HPLC have shown that stainless steel and titanium are the most compatible materials. Polycarbonate contribu

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4

Alcaraz, Jean-Pierre. "Conception guidée par la physiologie de biopiles bioinspirées implantables." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAS011/document.

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On peut imaginer dans un futur proche que des micro-robots implantés pourront suppléer la défaillance de certaines fonctions essentielles. C’est déjà le cas avec les stimulateurs cardiaques dont les piles au lithium sont bien adaptées à leur fonctionnement pendant des années de vie du patient. Cependant, pour des systèmes plus gourmands en énergie, il convient d’améliorer la longévité et la puissance volumique de ces piles. La stratégie que nous avons choisie est basée sur une approche biomimétique et deux voies ont été suivies pour créer une biopile bioinspirée : les biopiles enzymatiques gén

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5

Lahor, i. Soler Eduard. "Comportament dels implants actius cardíacs sotmesos als efectes d’aparells electrònics i electromagnètics utilitzats en l’àmbit de l’odontostomatologia clínica. Estudi in vitro." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/310945.

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INTRODUCCIÓ: Els implants actius cardíacs -IACs-, marcapassos i desfibril·ladors automàtics implantables, són dispositius electrònics capaços d’analitzar el ritme del cor i tractar les arítmies mitjançant estímuls elèctrics. Malgrat que els dispositius de tractament del ritme cardíac actuals tenen mecanismes de protecció que reconeixen i filtren la major part del soroll elèctric ambiental, els pacients portadors d’IACs haurien de prendre certes precaucions quan s’exposen a camps electromagnètics ja que podrien afectar temporalment el funcionament d’aquests dispositius. La pràctica de l’odontol

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6

Tickle, Jacqueline Amanda. "Engineering neural cells in implantable materials." Thesis, Keele University, 2017. http://eprints.keele.ac.uk/3774/.

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A key goal in regenerative therapy is to improve outcomes following the devastating consequences of spinal cord injury. Yearly, between 250,000 to 500,000 people suffer permanent injury to the spinal cord. The cost to the individual, their families and society is substantial. Modest success in clinical trials has offered hope. However, there remain a number of challenges still to be met in respect of a combinatorial approach that offers safe delivery of grafts, to promote recovery and regeneration in the injured spinal cord. In this context astrocytes have shown promise as a cell transplant po

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7

Selvakumaran, Jamunanithy. "Assessment of materials for use in chronically implantable microelectrodes." Thesis, University of Surrey, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273190.

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8

Ho, Duc Hong Linh 1978. "Emergency delivery of Vasopressin from an implantable MEMS rapid drug delivery device." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/52790.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student submitted PDF version of thesis.<br>Includes bibliographical references.<br>An implantable rapid drug delivery device based on micro-electro-mechanical systems (MEMS) technology was designed, fabricated and validated for the in vivo rapid delivery of vasopressin in a rabbit model. In vitro characterization of device

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9

Li, Yawen 1972. "Mechanical characterization and in vivo operation of an implantable drug delivery MEMS device." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30254.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2005.<br>Includes bibliographical references.<br>The goal of this thesis was to advance an implantable drug delivery MEMS (MicroElectroMechanical Systems) device developed in our laboratory. This device was designed to locally deliver multiple substances in complex release profiles in order to maximize the effectiveness of drug therapies. It consists of an array of microreservoirs etched into a silicon substrate. Different types and dosages of drugs can be contained in these reservoirs capped by

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10

Yilmaz, Tuba. "Characterization of tissue mimicking materials for testing of implantable and on body antennas." Master's thesis, Mississippi State : Mississippi State University, 2009. http://library.msstate.edu/etd/show.asp?etd=etd-05282009-120047.

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11

Sun, Di. "CHARACTERIZATION OF MEDICAL GRADE POLY-DIMETHYLSILOXANE AS ENCAPSULATION MATERIALS FOR IMPLANTABLE MICROELECTROMECHANICAL SYSTEMS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396631435.

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12

Lefebvre, Sylvie. "Mucoviscidose et systemes d'acces veineux totalement implantables : resultats de l'utilisation de ce materiel chez 33 patients." Lille 2, 1992. http://www.theses.fr/1992LIL2M157.

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13

Alves, Regina Estevam. "Processamento de superfícies poliméricas com pulsos laser de nano e femtossegundos." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-12112015-141315/.

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Neste trabalho exploramos o uso de diferentes técnicas de microestruturação de materiais poliméricos a laser, visando a obteção de superfícies que podem ser aplicadas tanto no desenvolvimento de dispositivos fotônicos quanto de materiais biomédicos. Primeiramente, estudamos a influência da energia de pulso e velocidade de translação sobre as microestruturas produzidas na superfície de filmes de poli(2-metóxi-5-(2-etil-hexiloxi)-1,4-fenileno vinileno) (MEH-PPV). Observamos que a rugosidade da superfície microestruturada aumentou significativamente com o aumento da energia de pulso e velocidade

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14

Van, Schaik Graham(Graham W. ). "A histological and immunological response study of an implantable microcapsule drug delivery device for the treatment of glioblastoma." Thesis, Massachusetts Institute of Technology, 2012. https://hdl.handle.net/1721.1/127718.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2012<br>Cataloged from the PDF of thesis.<br>Includes bibliographical references (pages 40-42).<br>Glioblastoma Multiform (GBM) and the more prevalent metastatic brain tumor are some of the most deadly forms of cancer, accounting for the death of nearly 14,000 individuals yearly. Previous treatment options for brain cancers include tumor resection, radiation, and chemo therapy but such options provide limited success in prolonging patients' life. Most patients experience tumor recurrence near

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15

Jow, Uei-Ming. "A multiband inductive wireless link for implantable medical devices and small freely behaving animal subjects." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/51930.

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The objective of this research is to introduce two state-of-the-art wireless biomedical systems: (1) a multiband transcutaneous communication system for implantable microelectronic devices (IMDs) and (2) a new wireless power delivery system, called the “EnerCage,” for experiments involving freely-behaving animals. The wireless multiband link for IMDs achieves power transmission via a pair of coils designed for maximum coupling efficiency. The data link is able to handle large communication bandwidth with minimum interference from the power-carrier thanks to its optimized geometry. Wireless dat

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16

Ju, Young Min. "A novel bio-stable 3D porous collagen scaffold for implantable biosensor." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002354.

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17

Dziubla, Thomas D. Lowman Anthony M. "Macroporous hydrogels as vascularizable soft tissue-implant interfaces : materials characterization, in vitro evaluation, computer simulations, and applications in implantable drug delivery devices /." Philadelphia : Drexel University, 2002. http://dspace.library.drexel.edu/handle/1721.1/36.

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18

Loir, A. S. "Elaboration de couches minces de carbone par ablation laser femtoseconde pour application aux biomatériaux implantables." Phd thesis, Université Jean Monnet - Saint-Etienne, 2004. http://tel.archives-ouvertes.fr/tel-00005448.

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Ce travail concerne l'élaboration de couches minces de DLC (Diamond-Like Carbon) par ablation laser femtoseconde pour une application biomédicale : la prothèse de hanche. Les propriétés structurales, mécaniques et tribologiques des films de carbone ont été caractérisées et une tête sphérique de prothèse de hanche a été revêtue. Ce mémoire se divise en quatre parties : le premier chapitre présente les propriétés du carbone en couches minces, une revue des différentes techniques d'élaboration de ces films et les applications potentielles ou avérées de ces derniers. Le deuxième chapitre est consa

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19

Bock, Eduardo Guy Perpétuo. "Projeto, construção e testes de desempenho "In Vitro" de uma bomba de sangue centrifuga implantavel." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263269.

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Orientadores: Antonio Celso Fonseca de Arruda, Aron Jose Pazin de Andrade<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-09T06:51:30Z (GMT). No. of bitstreams: 1 Bock_EduardoGuyPerpetuo_M.pdf: 3873649 bytes, checksum: 91eb2ac5543b164e576ca7a5e61d6a45 (MD5) Previous issue date: 2007<br>Resumo: Uma bomba centrífuga implantável foi projetada e construída para assistência ventricular de longa duração no tratamento de pacientes portadores de doenças cardiovasculares. A metodologia utilizada foi a de testes de

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20

Le, cann Sophie. "Etude biomécanique d'un nouvel implant rachidien pour préserver la croissance et la mobilité dans le traitement des scolioses." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4074/document.

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Le "gold-standard" du traitement chirurgical des scolioses est l'arthrodèse, qui consiste, à l'aide d'une instrumentation adaptée, à corriger et redresser les déformations scoliotiques, puis fusionner les vertèbres du segment pathologique afin de consolider la correction réalisée. Cette fusion entraine la destruction de la biomécanique physiologique du rachis, en supprimant sa mobilité et sa croissance. Les travaux réalisés dans le cadre de cette thèse portent sur le développement et la validation d'un nouveau concept d'instrumentation rachidienne ayant pour objectifs de réduire voire d'arrête

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21

Silva, Evandro Drigo da. "Nova abordagem na transmissão de energia transcutânea para dispositivos de assistência ventricular implantáveis." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/98/98131/tde-18092018-095803/.

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Com a crescente demanda por dispositivos implantáveis de suporte cardíaco (vulgarmente chamados de Coração Artificial) no tratamento da insuficiência cardíaca, surge a demanda por sistemas de transmissão de energia transcutânea (TET) para recarregamento das baterias implantadas. Esses sistemas reduzem os riscos de infecções, por não terem cabos atravessando a pele para alimentar os implantes; evitando também intervenções cirúrgicas reincidentes para troca de baterias. Normalmente, são pesquisados e testados sistemas TET por acoplamento magnético (indutivo) entre bobinas através da pele. Este t

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22

Yniguez, Francisco [Verfasser], and Christian [Akademischer Betreuer] Hagl. "Tissue Engineering: Die Dezellularisierung zellbeschichteten Polyurethans : ein experimenteller Ansatz für die Herstellung eines biohybriden Materials als Bestandteil zukünftiger kardiovaskulärer Implantate / Francisco Yniguez ; Betreuer: Christian Hagl." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2020. http://d-nb.info/1208150170/34.

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23

Nikam, Shantanu P. "LOCALIZED ANTIBIOTIC DELIVERY VIA VALINE BASED POLY(ESTER UREA)." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1522931095020122.

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24

Wu, Wan-Chen, and 吳宛蓁. "Studies of Applying 3-mercaptopropyl(trimethoxysilane) on Sealing Gaps between Electrodes and Packing Material of Implantable Devices." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/36367207043287907974.

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碩士<br>中原大學<br>醫學工程研究所<br>95<br>An implantable device requires hermitical packaging. In general, the device contains miniaturized electronic printed circuit boards (μ-PCB) and electrodes. The electrodes are usually designed to contact living tissues; on the other hand the μ-PCB must be properly encapsulated. Thus, encapsulation materials and the electrodes, which are likely noble metals, are partially contacted. Good candidates of the encapsulation materials include polydimethylsiloxane (PDMS) and boron silica for their biocompatible features. To ensure that the contact boundaries between the m

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25

Ting, Jen-Kuei, and 丁仁奎. "Using (3-Mercaptopropyl)trimethoxysilanes as an Adhesion Material for Binding Glass and Platinum in Implantable Bio-electronic Device Application." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/13132833301368571046.

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碩士<br>中原大學<br>醫學工程研究所<br>97<br>An implantable electronic device mainly consists of miniaturized electronic print circuit boards (μ-PCB) and metal electrodes. To avoid the μ-PCB from damage by moisture within human body, there is a need to encapsulate it hermetically. The electrodes on the other hand must be touched with body tissues. For a device with such component configuration, the contact between packaging materials used and metal electrodes is inevitable. When boron silica is used as the encapsulating material, often the sintering technology is applied. However, due to the different mater

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26

Damdam, Asrar N. "Reconfigurable Electronics Platform: Concept, Mechanics, Materials and Process." Thesis, 2018. http://hdl.handle.net/10754/628254.

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Electronic platforms that are able to re-shape and assume different geometries are attractive for the advancing biomedical technologies, where the re-shaping feature increases the adaptability and compliance of the electronic platform to the human body. In this thesis, we present a serpentine-honeycomb reconfigurable electronic platform that has the ability to reconfigure into five different geometries: quatrefoil, ellipse, diamond, star and one irregular geometry. We show the fabrication processes of the serpentine-honeycomb reconfigurable platform in a micro-scale, using amorphous silicon, a

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27

Wei-LuenChen and 陳韋綸. "Investigation of structure and properties of implantable calcium sulfate and calcium sulfate/calcium phosphate composite materials." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/pwke46.

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博士<br>國立成功大學<br>材料科學及工程學系<br>102<br>Abstract Due to its superior biocompatibility and osteoconductivity, calcium sulfate cement and calcium phosphate cement (CPC) has been suggested for use as a bone void filling material in dental and orthopedic applications. Primary purposes of this research are to investigate on the structure and properties of a series of in-house developed calcium-based cement bone substitute materials. The first part of the study focuses on investigate the in-house developed calcium sulfate bone cement of the setting solution, diammonium hydrogen phosphate ((NH4)2HPO4),

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28

"From Materials to Devices: (I) Ultrathin Flexible Implantable Bio-probes with Biodegradable Sacrificial Layers (II) Carrier Spin Injection and Transport in Diamond." Doctoral diss., 2018. http://hdl.handle.net/2286/R.I.48466.

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abstract: My research has been focusing on the innovations of material and structure designs, and the development of fabrication processes of novel nanoelectronics devices. My first project addresses the long-existing challenge of implantable neural probes, where high rigidity and high flexibility for the probe need to be satisfied at the same time. Two types of probes that can be used out of the box have been demonstrated, including (1) a compact probe that spontaneously forms three-dimensional bend-up devices only after implantation, and (2) an ultra-flexible probe as thin as 2 µm attached

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29

Flores, Constanza Y. "Nanopartículas de plata con potenciales aplicaciones en materiales implantables: síntesis, caracterización fisicoquímica y actividad bactericida." Tesis, 2014. http://hdl.handle.net/10915/34946.

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El objetivo general del presente Trabajo de Tesis fue la preparación y caracterización de superficies sólidas modificadas con nanopartículas de plata con potenciales aplicaciones en Biomedicina. Para esto se optimizó el método de síntesis de nanopartículas de plata (NPs Ag) recubiertas con citrato, obteniendo NPs Ag monodispersas de 6 ± 2 nm de diámetro recubiertas con citrato y estables en medios acuosos. Asimismo, se estudió la inmovilización de estas NPs Ag sobre superficies de Ti/TiO<SUB>2</SUB>, encontrándose que las mismas se adsorben espontáneamente sobre dichas superficies como resulta

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30

(9189602), Tran NH Nguyen. "Printable Electrochemical Biosensors for the Detection of Neurotransmitter and Other Biological Molecule." Thesis, 2020.

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<div>Glutamate is the principal excitatory neurotransmitter in the central nervous system. As one of the most abundant neurotransmitters, glutamate plays an essential role in many processes of the central nervous system and beyond. As a result, any disruption that causes an abnormal glutamate level can significantly impact the central nervous system's neurological functions. Glutamate excitotoxicity is a neuropathology that persists in many neurodegenerative disorders such as Parkinson's and Alzheimer's disease as well as in the traumatic brain and spinal cord injuries. Thus, the ability to ob

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31

Hüll, Stephanie. "Gewebereaktionen auf nicht-metallische kardiovaskuläre Implantatmaterialien zum Einsatz bei der Therapie angeborener Herzfehler." Doctoral thesis, 2016. http://hdl.handle.net/11858/00-1735-0000-002B-7CBA-1.

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Bei angeborenen Herzfehlern, die bei 1 bis 1,2 % aller Lebendgeburten auftreten und so-mit die häufigste behandlungsbedürftige Organfehlbildung darstellen, kommen regelhaft kardiovaskuläre Implantate im Rahmen der chirurgischen bzw. interventionellen Therapie zum Einsatz. Hierzu zählen u. a. Shunts, Patches und Okkluder, die aus verschiedenen Implantatmaterialien hergestellt werden. Das Ziel dieser Arbeit bestand darin – basierend auf histologischen Untersuchungen – Unterschiede bzw. Gemeinsamkeiten bezüglich der Biokompatibilität nicht-metallischer Implantatmaterialien zu prüfen, da eine bewu

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