Nanomechanical characterization of mineralized tissues in the oral cavity

Chan, Y.L.; Ngan, A.H.W.; King, Nigel M.

doi:10.1016/b978-0-12-812291-4.00014-5

Cited by 3 publications

(11 citation statements)

References 45 publications

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“…It is known that the time to reach a certain force can be shortened by increasing the load, and oppositely, a high force is necessary for a high strain rate at the same indentation depth [ 21 ]. Considering that the experiments were performed at constant load and the same penetration depth, the variation in the load curves are exclusively originated from the local and respectively intrinsic mechanical properties of materials.…”

Section: Resultsmentioning

confidence: 99%

“…In a load-controlled test, pop-ins are characterized by unexpected bursts of indentation displacement, the first pop-in marking the transition from purely elastic behavior to plastic deformation and the formation of a permanent hardness impression, this event acts as a trigger for the onset of plastic deformation [ 29 , 30 ] and is not observed in the registered load-displacement curves. According to the literature, the pop-out effects, which are observed in the unloading region of all load-displacement curves ( Figure 2 ) have been attributed to many different factors [ 21 , 24 , 25 , 26 , 27 , 28 ] and mainly depend on the unloading conditions, such as the indentation and unloading rate. Usually, a large indentation load and a low unloading rate will promote the appearance of these effects.…”

Section: Discussionmentioning

confidence: 98%

“…Among the variety of techniques described and used in the specialized literature, nanoindentation represents an effective method in the assessment of mechanical properties of materials, such as hardness and Young’s modulus on a micro- and nanoscale level, providing accurate and consecutive measurements of the indentation load (P) and penetration depth (h) [ 24 ]. Mainly, owing to its advantages, such as high spatial resolution, simplicity and ability to make nano/microscale measurements, this method has become a very powerful approach in accurate investigation of nanomechanical features of dental restorative materials [ 21 , 25 ]. In conventional nanoindentation, an indenter tip is driven into the material surface with a known force and retracted sequentially; during indenting the load and depth of penetration are recorded, which are next used to construct the force–displacement curve [ 24 ].…”

Section: Discussionmentioning

confidence: 99%

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Mechanical Properties of Polymer-Based Blanks for Machined Dental Restorations

et al. 2021

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The tremendous technological and dental material progress led to a progressive advancement of treatment technologies and materials in restorative dentistry and prosthodontics. In this approach, CAD/CAM restorations have proven to be valuable restorative dental materials in both provisional and definitive restoration, owing to multifarious design, improved and highly tunable mechanical, physical and morphological properties. Thus far, the dentistry market offers a wide range of CAD/CAM restorative dental materials with highly sophisticated design and proper characteristics for a particular clinical problem or multiple dentistry purposes. The main goal of this research study was to comparatively investigate the micro-mechanical properties of various CAD/CAM restorations, which are presented on the market and used in clinical dentistry. Among the investigated dental specimens, hybrid ceramic-based CAD/CAM presented the highest micro-mechanical properties, followed by CAD/CAM PMMA-graphene, while the lowest micro-mechanical features were registered for CAD/CAM multilayered PMMA.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

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Mechanical Properties of Polymer-Based Blanks for Machined Dental Restorations

et al. 2021

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“…Berkovich, ponta cúbica, cono-esférica e plana, sendo a primeira mais comumente utilizada nestes testes (Subramani et al, 2018). A diferença básica entre as pontas mais empregadas nos testes se dá em relação à mensuração das indentações.…”

Section: Lista De Figurasunclassified

“…Quando são pequenos, há a necessidade de serem incorporados em resina para facilitar o manuseio durante o experimento, bem como servir de suporte durante o processo de indentação (Subramani et al, 2018). O embutimento deve ser cauteloso, visto que os resultados podem ser alterados caso haja resina sobre o espécime (Subramani et al, 2018). A rugosidade da superfície analisada também é um fator que pode influenciar na dureza (Bobji;Biswas, 1998).…”

Section: Durezaunclassified

Avaliação da dureza dos tecidos dentários hígido e cariado

Costa¹

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Primeiramente, agradeço a Deus por toda força dada para concluir mais um projeto de vida, tendo em vista todas as dificuldades e superações ao longo da minha jornada, seja ela profissional ou mesmo pessoal.Agradeço à minha família por todo apoio e incentivo para que eu siga buscando pelos meus sonhos. Em especial aos meus pais, Valéria e Paulo César, os quais sempre lutaram para me oferecer as melhores coisas da vida. Aos meus irmãos, Kenya, Paulo César Júnior, Adany e Kevin, por sempre me incentivarem e acreditarem em meu potencial.Agradeço ao Victor Hugo, por sempre estar ao meu lado, ser um grande apoio e me ajudar em muitas decisões da vida. Aproveito também para agradecer em especial à minha amiga Ruth, por estar junto de mim em várias etapas desse trabalho e ser uma grande amiga. Também, agradeço à minha amiga Brenda por ser um grande suporte em São Paulo, apoiadora e conselheira.Agradeço à minha orientadora, Adriana, por ter me acolhido como seu orientado, por ter compartilhado o seu conhecimento, ter me ajudado no desenvolvimento profissional e ter oportunizado vários momentos importantes. Agradeço aos alunos de iniciação científica, Naor e Maithê, por terem percorrido toda essa trajetória comigo e compartilhado vários momentos de risadas. Um agradecimento especial à Érika, por ter me ajudado bastante nesse trabalho e me ensinado muito sobre as etapas laboratoriais.A Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CAPES) -Código de Financiamento 001 (processo número: 88887.616403/2021-00), agradeço pelo apoio financeiro e por acreditar que com a pesquisa chegaremos cada vez mais longe. Também, agradeço a FUNDECTO por ceder o espaço, muitas vezes, para realizar parte das etapas da pesquisa.Outro agradecimento especial vai para os funcionários do departamento de dentística, Aldo, Selma e Silvana, vocês são essenciais em nossa trajetória.No mais, agradeço a todos os outros aqui não mencionados, mas que de alguma forma me ajudaram a conquistar tudo isso, seja professores e amigos. Obrigado à banca por terem aceitado o meu convite e ajudar a enriquecer esse estudo. RESUMOCosta MC. Avaliação da dureza dos tecidos dentários hígido e cariado [dissertação].

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Applications of scanning electron microscopy and focused ion beam milling in dental research

House

Long

O’Carroll

et al. 2022

European J Oral Sciences

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The abilities of scanning electron microscopy (SEM) and focused ion beam (FIB) milling for obtaining high-resolution images from top surfaces, cross-sectional surfaces, and even in three dimensions, are becoming increasingly important for imaging and analyzing tooth structures such as enamel and dentin. FIB was originally developed for material research in the semiconductor industry. However, use of SEM/FIB has been growing recently in dental research due to the versatility of dual platform instruments that can be used as a milling device to obtain low-artifact cross-sections of samples combined with high-resolution images. The advent of the SEM/FIB system and accessories may offer access to previously inaccessible length scales for characterizing tooth structures for dental research, opening exciting opportunities to address many central questions in dental research. New discoveries and fundamental breakthroughs in understanding are likely to follow. This review covers the applications, key findings, and future direction of SEM/FIB in dental research in morphology imaging, specimen preparation for transmission electron microscopy (TEM) analysis, and three-dimensional volume imaging using SEM/FIB tomography.

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Nanomechanical characterization of mineralized tissues in the oral cavity

Cited by 3 publications

References 45 publications

Mechanical Properties of Polymer-Based Blanks for Machined Dental Restorations

Mechanical Properties of Polymer-Based Blanks for Machined Dental Restorations

Avaliação da dureza dos tecidos dentários hígido e cariado

Applications of scanning electron microscopy and focused ion beam milling in dental research

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