Rozprawy doktorskie na temat „Enamel”
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Fletcher, Jane. "Regenerative Dental Enamel". Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525455.
Pełny tekst źródłaFong, Hanson Kwok. "Towards enamel biomimetics : structure, mechanical properties & biomineralization of dental enamel /". Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/10606.
Pełny tekst źródłaWong, Hai Ming. "Developmental defects of enamel". Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36269815.
Pełny tekst źródłaWong, Hai Ming, i 王海明. "Developmental defects of enamel". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B36269815.
Pełny tekst źródłaBenson, Philip Edward. "Measurement of enamel demineralisation". Thesis, University of Liverpool, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368002.
Pełny tekst źródłaKirkham, J. "The mineralisation of dental enamel : An investigation into the role of developing enamel proteins". Thesis, University of Leeds, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354310.
Pełny tekst źródłaLihong, He. "Mechanical behaviour of human enamel and the relationship to its structural and compositional characteristics". Connect to full text, 2008. http://hdl.handle.net/2123/3536.
Pełny tekst źródłaTitle from title screen (viewed 9 October 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Biomaterials Science Research Unit, Faculty of Dentistry. Includes bibliographical references. Also available in print form.
McKee, Marc Douglas. "A morphological and functional investigation of the enamel organ and enamel in the rat incisor /". Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75424.
Pełny tekst źródła湯翠明 i Sui-ming Lily Tong. "The clinical and microscopic effects of vital bleaching and enamel micro-abrasion on surface enamel". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B30433204.
Pełny tekst źródłaTong, Sui-ming Lily. "The clinical and microscopic effects of vital bleaching and enamel micro-abrasion on surface enamel /". Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21129678.
Pełny tekst źródłaKing, Nigel Martyn. "Prevalence and characteristics of developmental defects of dental enamel in Hong Kong". Thesis, Hong Kong : Dept. of Children's Dentistry & Orthodontics, University of Hong Kong, 1990. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12838007.
Pełny tekst źródłaHung, Cheung-sing Tony. "Bonding of dental alloys to enamel". Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/HKUTO/record/B39558150.
Pełny tekst źródła孔祥陞 i Cheung-sing Tony Hung. "Bonding of dental alloys to enamel". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B39558150.
Pełny tekst źródłaCreanor, Stephen Leonard. "Remineralisation of the incipient enamel lesion". Thesis, University of Glasgow, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305637.
Pełny tekst źródłaBirch, W. J. "Incremental growth of deciduous tooth enamel". Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1348309/.
Pełny tekst źródłaWilliams, David Michael. "Psychological impact of dental enamel opacities". Thesis, Cardiff University, 2005. http://orca.cf.ac.uk/55569/.
Pełny tekst źródłaChew, Hooi Pin. "Novel assessments of early enamel erosion". Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/novel-assessments-of-early-enamel-erosion(3d27373c-adf3-4254-9789-66b587b22d92).html.
Pełny tekst źródłaChoi, Yuen-ling Ruth. "The prevalence of enamel defects in Hong Kong Children in 1983 and 1991 a thesis submitted to the University of Hong Kong in partial fulfilment of the requirements for the degree of Master of Dental Surgery /". Click to view the E-thesis via HKUTO, 1993. http://sunzi.lib.hku.hk/HKUTO/record/B38628508.
Pełny tekst źródłaItthagarun, Anut. "Effect of dentifrices on the fluoride uptake, de/ remineralization andmorphology of sound enamel and initial enamel lesions". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31238622.
Pełny tekst źródła蔡苑玲 i Yuen-ling Ruth Choi. "The prevalence of enamel defects in Hong Kong Children in 1983 and 1991: a thesis submitted to the University ofHong Kong in partial fulfilment of the requirements for the degree ofMaster of Dental Surgery". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1993. http://hub.hku.hk/bib/B38628508.
Pełny tekst źródłaItthagarun, Anut. "Effect of dentifrices on the fluoride uptake, de/ remineralization and morphology of sound enamel and initial enamel lesions /". Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2112971X.
Pełny tekst źródłaNkosi, P. M. "Efficacy of enamel sealants in preventing demineralisation". Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5068_1263936707.
Pełny tekst źródłaWalsh, Paula. "Acid permeation into dental enamel and hyroxyapatite". Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317283.
Pełny tekst źródłaDansie, Brian L. "Micronutrition and Enamel Disturbances in Bronchopulmonary Dysplasia". The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1372026150.
Pełny tekst źródłaPellillo, Sonni. "Effects of sodium hypochlorite on enamel composition". Thesis, NSUWorks, 2015. https://nsuworks.nova.edu/hpd_cdm_stuetd/66.
Pełny tekst źródłaAl-Azzawi, Samaa. "Variations of the elastic modulus of human enamel :". Thesis, Queen Mary, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404377.
Pełny tekst źródłaPeck, S. "Acoustic microscopy of caries in human dental enamel". Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375312.
Pełny tekst źródłaZhu, Jiajun, i 朱嘉珺. "Ultra-structural aspects of human enamel surface pretreatments". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/208558.
Pełny tekst źródłaTetlow, Andrew Peter. "Linear enamel hypoplasia at Santa Rita Corozal, Belize". Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4608.
Pełny tekst źródłaID: 029050230; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.A.)--University of Central Florida, 2010.; Includes bibliographical references (p. 102-109).
M.A.
Masters
Department of Anthropology
Sciences
Boyle, Edward Liam. "Factors affecting demineralisation and remineralisation of human enamel". Thesis, University of Liverpool, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367095.
Pełny tekst źródłaKosztolowicz, Tadeusz, i Katarzyna D. Lewandowska. "Subdiffusive reaction front in the enamel caries process". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196978.
Pełny tekst źródłaKosztolowicz, Tadeusz, i Katarzyna D. Lewandowska. "Subdiffusive reaction front in the enamel caries process". Diffusion fundamentals 2 (2005) 124, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14466.
Pełny tekst źródłaWang, Hsiao-Chuan David. "Laser ultrasonic technique for evaluating human dental enamel". Thesis, The University of Sydney, 2009. https://hdl.handle.net/2123/29230.
Pełny tekst źródłaAl-Obaidi, Rand. "In vitro enamel subsurface lesions : characterization and treatment". Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTT017/document.
Pełny tekst źródłaWhite spot lesion is the subsurface hypomineralization of enamel indicating the 1st stage of dental caries development. Early detection of incipient dental caries before it reaches the stage of cavitation offers an opportunity for effective dental care. The objectives of this study were to strengthen the idiom of minimally invasive treatment. In order to achieve the specified goals; we have identified a modified pH cycling model that can mimic the intraoral conditions leading to white spot lesions formation in a short time. In addition, non-invasive optical techniques, such as confocal Raman microscopy and multiphoton microscopy were used in this study to detect small changes in the enamel chemical composition in vitro.Furthermore, nano-indentation technique was used to detect the changes in the mechanical properties of enamel and relate them to those affecting its chemical composition after caries induction in order to add chemico-mechanical specificity in providing important information about subsurface lesions in enamel. The obtained results demonstrate a great potential for the examined techniques, providing a basis for interesting applications in the clinical diagnosis of various pathological conditions in dentistry. To treatment the incipient carious lesions non-invasively, the effectiveness of GC Tooth Mousse cream and nHA containing-dentifrice "KAREX" in the remineralization of demineralized enamel through localizing amorphous calcium phosphate at tooth surface has been inspected. The study indicated a lack of reliable evidence supporting the efficacy of remineralizing agents in the treatment of white spot lesions. Within the limitations of this study, further laboratory studies together with clinical research are therefore required to increase the available knowledge on this prevalent subject
Shabanian-Borojeni, Mitra. "Wear studies of enamel and some restorative materials". Title page, contents and summary only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phs5241.pdf.
Pełny tekst źródłaHe, Lihong. "Mechanical Behaviour Of Human Enamel And The Relationship To Its Structural And Compositional Characteristics". Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/5106.
Pełny tekst źródłaObjectives As the outer cover of teeth structure, enamel is the hardest, stiffest and one of the most durable load-bearing tissues of the human body. Also, enamel is an elegantly designed natural biocomposite. From a material science point of view, scientists are interested in the structure and function of the nature material. How does nature design the material to meet its functional needs? From a dental clinic point of view, dental practitioners are keen to know the properties of enamel and compare it with different dental materials. What kind of dental materials can best simulate enamel as a restoration in the oral cavity? The research presented in this thesis on the mechanical behaviour of enamel in respect of its structural and compositional characteristics will attempt to provide answers or indications to the above questions. Theoretical analysis, as well as experimental investigations of both man-made and natural composites materials, has shown that hierarchical microstructure and organic matrix glues the inorganic particles together and plays an important role in regulating the mechanical properties of the composite. Bearing this finding in mind, in the current investigations, we assume the hierarchical microstructure and trace protein remnants in enamel regulate the mechanical behaviour of the natural biocomposite to meet its functional needs as a load bearing tissue with superb anti-fatigue and wear resistant properties. One of the important reasons that dental hard tissues haven’t been thoroughly investigated is due to the limited sample volume. Fortunately, with the development of nanoindentation technique and equipment, it is now possible to explore the mechanical properties of small volume samples. The application of nanoindentation on dental hard tissues has been documented. However, most investigations have concentrated on only reporting the basic mechanical properties such as elastic modulus and hardness. Very few of them have taken the role of microstructure and composition of these natural biocomposites into their considerations. The main aim of this investigation is to interpret how microstructural and compositional features of enamel regulate its mechanical behaviour. To achieve this goal, the analytical methods considering nanoindentation data need to be expanded so that more information not only elastic modulus and hardness but also stress-strain relationship, energy absorption ability, and creep behaviour may be evaluated with this technique. These new methods will also be of benefit to dental material evaluation and selection. Materials and methods Based on the Oliver-Pharr method1 for the analysis of nanoindentation data, Hertzian contact theory2 and Tabor’s theory3, a spherical nanoindentation method for measuring the stress-strain relationship was developed. Furthermore, nanoindentation energy absorption analysis method and nanoindentation creep test were developed to measure the inelastic property of enamel. With the above methods, sound enamel samples were investigated and compared with various dental materials, including dental ceramics and dental alloys. • Firstly, using a Berkovich indenter and three spherical indenters with 5, 10 and 20 µm nominal radius, the elastic modulus, hardness and stress-strain relationship of different samples were investigated and compared. • Secondly, mechanical properties of enamel in respect to its microstructure were investigated intensively using different indenters by sectioning teeth at different angles. • Thirdly, inelastic behaviour of enamel such as energy absorption and creep deformation were observed and compared with a fully sintered dense hydroxyapatite (HAP) disk to illustrate the roles of protein remnants in regulating the mechanical behaviour of enamel. • Fourthly, to confirm the functions of protein remnants in controlling mechanical behaviour of enamel, enamel samples were treated under different environments such as burning (300°C exposure for 5 min), alcohol dehydration and rehydration to change the properties of proteins before the nanoindentation tests. • Lastly, micro-Raman spectroscopy was employed to measure and compare the indentation residual stresses in enamel and HAP disk to evaluate the role of both hierarchical microstructure and protein remnants in redistributing the stresses and reinforcing the mechanical response of enamel to deformation. Results and significance Nanoindentation is an attractive method for measuring the mechanical behaviour of small specimen volumes. Using this technique, the mechanical properties of enamel were investigated at different orientations and compared with dental restorative materials. From the present study, the following results were found and conclusions were drawn. Although some newly developed dental ceramics have similar elastic modulus to enamel, the hardness of these ceramic products is still much higher than enamel; in contrast, despite the higher elastic modulus, dental metallic alloys have very similar hardness as enamel. Furthermore, enamel has similar stress-strain relationships and creep behaviour to that of dental metallic alloys. SEM also showed enamel has an inelastic deformation pattern around indentation impressions. All of these responses indicated that enamel behaves more like a metallic material rather than a ceramic. Elastic modulus of enamel is influenced by highly oriented rod units and HAP crystallites. As a result, it was found to be a function of contact area. This provides a basis to understand the different results reported in the literature from macro-scale and micro-scale tests. Anisotropic properties of enamel, which arise from the rod units, are well reflected in the stress-strain curves. The top surface (perpendicular to the rod axis) is stiffer and has higher stress-strain response than an adjacent cross section surface because of the greater influence of the prism sheaths in the latter behaviour. Enamel showed much higher energy absorption capacity and considerably more creep deformation behaviour than HAP, a ceramic material with similar mineral composition. This is argued to be due to the existence of minor protein remnants in enamel. Possible mechanisms include fluid flow within the sheath structure, protein “sacrificial bond” theory, and nano-scale friction within sheaths associated with the degustation of enamel rods. A simple model with respect of hierarchical microstructure of enamel was developed to illustrate the structural related contact deformation mechanisms of human enamel. Within the contact indentation area, thin protein layers between HAP crystallites bear most of the deformation in the form of shear strain, which is approximately 16 times bigger than contact strain in the case of a Vickers indenter. By replotting energy absorption against mean strain value of a protein layer, data from different indenters on enamel superimposed, validating the model. This model partially explained the non-linear indentation stress-strain relationship, inelastic contact response and large energy absorption ability of enamel and indicated the inelastic characteristics of enamel were related to the thin protein layers between crystallites. Following different treatments, mechanical properties of enamel changed significantly. By denaturing or destroying the protein remnants, mechanical behaviour, especially inelastic abilities of enamel decreased dramatically, which indicates matrix proteins endow enamel better performance as a load bearing calcified tissue. Comparison of Raman derived residual maps about indentations in enamel and a sintered homogeneous HAP showed the hierarchical structure influenced the residual stress distribution within enamel. Moreover, less residual stresses were found in enamel and were a consequence of the protein remnants. These are evidence as to how the microstructure meets the functional needs of the enamel tissue. In general, evidence from different approaches indicated that the hierarchical microstructure and small protein remnants regulated the mechanical behaviour of enamel significantly at various hierarchical levels utilising different mechanisms. This investigation has provided some basis for understanding natural biocomposites and assisting with dental clinic materials selection and treatment evaluation procedures. References 1. Oliver WC, Pharr GM. An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J Mater Res. 1992;7(6):1564-83. 2. Hertz H. Miscellaneous Papers. London: Jones and Schott, Macmillan; 1863. 3. Tabor D. Hardness of Metals. Oxford: Clarendon Press; 1951.
Robinson, Bruce William. "A morphological study of the formation of the dentino-enamel junction in the rat molar : the role of dentin in enamel formation". Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27630.
Pełny tekst źródłaMedicine, Faculty of
Graduate
Bertacci, Angelica <1977>. "Evaluation of fluid transport processes in dental enamel. Methods to assess the relevance of enamel permeability in caries prevention and etching treatments". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1561/1/bertacci_angelica_tesi.pdf.
Pełny tekst źródłaBertacci, Angelica <1977>. "Evaluation of fluid transport processes in dental enamel. Methods to assess the relevance of enamel permeability in caries prevention and etching treatments". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1561/.
Pełny tekst źródłaSong, Rhan-Ju. "Developmental defects of enamel in the Maya of Altun Ha, Belize implications for Ancient Maya childhood health". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21702.pdf.
Pełny tekst źródłaHodnett, Spencer. "The protective potential of paste containing casein phosphopeptide-amorphous calcium phosphate as measured by confocal microscopy an in vitro study /". Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5051.
Pełny tekst źródłaTitle from document title page. Document formatted into pages; contains ix, 113 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 69-79).
Eimar, Hazem. "Tooth enamel ultrastructure: correlation between composition and physical properties". Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106624.
Pełny tekst źródłaL'émail des dents est un des matériaux les plus durs chez les animaux. En conséquence, la compréhension de ses propriétés uniques est d'un intérêt particulier pour l'interprétation les propriétés physiques distinctes de la dent, et pour le développement de nouveaux matériaux synthétiques. L'émail est un matériau composite qui contient une matrice inorganique de cristaux d'hydroxyapatite (HA) carbonatés et organisés hiérarchiquement, et une matrice organique composée principalement de la protéine Amelogenin. Cette étude a été désignée pour étudier comment les variations de l'ultra structure de l'émail et la composition chimique (organique et inorganique) peuvent affecter les propriétés mécaniques et optiques des dents. Une centaine des dents saines ont été extraites et recueillies auprès des patients adultes présentés à la clinique dentaire de premier cycle de l'Université McGill. Microindentation Vickers, la couleur spectrophotométrique, FTIR, SEM-EDS et XRD ont été utilisés pour évaluer la microdureté de l'émail, la couleur de la dent (enregistrée selon les paramètres universelles: la luminosité, la saturation et la teinte) et la composition chimique et cristallographique (i.e. la grandeur des cristaux, les paramètres de treillis du cristal; axe a et c). Les données obtenues ont été analysées pour la corrélation. Le niveau de signification statistique a été déterminé pour une valeur de P <0.05.La structure cristallographique de l'émail de la dent, la composition chimique, les propriétés optiques et mécaniques ont été variées considérablement au sein de la population étudiée. La microdureté de l'émail des dents a été influencée par la grandeur de ses cristaux HA (R= -0.476, B= -0.028, P= <0.001). La teinte de la dent a été influencée par la grandeur des cristaux HA de l'émail (R= -0.358, B= -0.866, P=0.007), la saturation a été influencée par la carbonisation de l'HA de l'émail (R= -0.420, B= -99.06, P= <0.001) et la luminosité a été influencée par les deux la grandeur des cristaux de l'HA de l'émail (R= -0.313, B= -1.052, P= 0.019), et le degré de carbonisation de l'HA (R= -0.266, B= -57.95, P= 0.034). D'autre part, la grandeur des cristaux de l'HA de l'émail à été inversement corrélée avec son teneur relative en matière organique (R = -0.352, B= -19.4, P= 0.016). Dans la présente étude, nous avons dévoilé que la variation de l'ultra structure de l'émail des dents et son composition chimique peuvent influencer les propriétés optiques et mécaniques de la dent. Par exemple, nous avons montré que la teneur en matière organique de l'émail des dents contrôle les propriétés mécaniques et optiques en contrôlant la grandeur des cristaux de l'HA. Par contre, la variation dans le degré de carbonisation de l'HA de l'émail peut également affecter les propriétés optiques des dents.
Jonas, M. "Electron spin resonance dating and dosimetry of tooth enamel". Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.605678.
Pełny tekst źródłaBullion, S. K. "Incremental structures of enamel and their applications to archaeology". Thesis, Lancaster University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381241.
Pełny tekst źródłaHobson, Ross S. "Factors affecting the resin to enamel bond in orthodontics". Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310170.
Pełny tekst źródłaWillmot, Derrick Robert. "Measurement of demineralised white enamel associated with orthodontic treatment". Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340219.
Pełny tekst źródłaPatel, V. "Proteomic studies into the pathogenesis of Enamel Renal Syndrome". Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10044766/.
Pełny tekst źródłaLewis, Jamie. "Lying through your teeth : strontium diagenesis in archaeological enamel". Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.686171.
Pełny tekst źródłaVerma, Shefalee. "Effects of fluoridated milk on artificial enamel carious lesions". Thesis, Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B41758201.
Pełny tekst źródłaBullion, Simone Katrina. "Incremental structures of enamel and their applications to archaeology". Online version, 1987. http://ethos.bl.uk/OrderDetails.do?did=1&uin=uk.bl.ethos.381241.
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