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Gotowa bibliografia na temat „Dental materials”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 9 czerwca 2025

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Artykuły w czasopismach na temat "Dental materials"

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AA VV, AA VV. "Dental materials/Materiali dentari." Dental Cadmos 01, no. 01 (July 2022): 135. http://dx.doi.org/10.19256/abstract.cduo.08.2022.

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AA VV, AA VV. "Dental materials/Materiali dentari." Dental Cadmos 01, no. 01 (November 2024): 129. http://dx.doi.org/10.19256/abstract.cduo.08.2024.

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AA VV, AA VV. "Dental materials/Materiali dentari." Dental Cadmos 01, no. 01 (September 2023): 155. http://dx.doi.org/10.19256/abstract.cduo.08.2023.

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Navaneethakrishnan, K. R., Sanjey Kumar Prabath Udaya Kumar, M. R. Murali, T. N. Sathya, Sangeetha V. Naveen, S. S. Murugan, and T. S. Kumaravel. "Cytotoxicity Testing of Dental Materials." Indian Journal Of Science And Technology 16, no. 27 (July 24, 2023): 2035–39. http://dx.doi.org/10.17485/ijst/v16i27.krn.

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Burke, FJ Trevor. "Dental materials." Dental Update 48, no. 8 (September 2, 2021): 601. http://dx.doi.org/10.12968/denu.2021.48.8.601.

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Martin, A. P., W. R. Hume, and J. W. Ketelbey. "DENTAL MATERIALS AND DENTAL PULP." Australian Dental Journal 35, no. 3 (June 1990): 301–2. http://dx.doi.org/10.1111/j.1834-7819.1990.tb05412.x.

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Kostić, Milena, and Ljubiša Nikolić. "Contemporary dental materials." Advanced Technologies 8, no. 1 (2019): 78–85. http://dx.doi.org/10.5937/savteh1901078k.

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Tiwari, Manali, Sanjeev Tyagi, Mukta Nigam, Mudita Rawal, Sangeeta Meena, and Abhishek Chowdhary. "Dental Smart Materials." Journal of Orofacial Research 5 (2015): 125–29. http://dx.doi.org/10.5005/jp-journals-10026-1195.

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Khurram, Maleeha, Khurram Jah Zafar, Aneela Qaisar, Tahmeena Atiq, and Sohail Abbas Khan. "RESTORATIVE DENTAL MATERIALS." Professional Medical Journal 25, no. 01 (January 8, 2018): 140–49. http://dx.doi.org/10.29309/tpmj/18.4230.

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Khurram, Maleeha, Khurram Jah Zafar, Aneela Qaisar, Tahmeena Atiq, and Sohail Abbas Khan. "RESTORATIVE DENTAL MATERIALS." Professional Medical Journal 25, no. 01 (January 10, 2018): 140–49. http://dx.doi.org/10.29309/tpmj/2018.25.01.553.

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Introduction: Erosion is an escalating problem in all age groups. Dental erosioncan be defined as painless irreversible loss of dental hard tissue due to chemical processwithout the involvement of microorganisms. There are several causes of erosion includingacidic foods and drinks. They are not only harmful to teeth but it is one of the main causes offailure of restoration. Erosion is one of the main challenges to restorative materials. Therefore,the restorative materials used in the mouth should resist or show minimal change in thesesituations. A variety of restorative materials are currently recommended for erosive lesions,including resin modified glass ionomer cement, resin composite and amalgam. Each materialhas its own advantages and disadvantages, which are considered before selecting them asrestorative materials. Objectives: To compare the surface micro-hardness of three restorativematerials when exposed to three acidic beverages and distilled water. Study design: This wasan experimental study. Setting: de’Montmorency College of dentistry in collaboration withPakistan council of scientific and industrial research (PCSIR) Lahore. Period: 6 months, Nov2014- April 2015. Material & Methods: Ninety six disc specimens prepared with resin modifiedglass ionomer, resin composite and amalgam restorative materials. The initial surface microhardnesstest was carried out at 1 day after mixing (before immersion) using micro-hardnesstesting machine. After base line study of micro-hardness the material specimens were subjectedto one of the storage media which was comprised of cola, apple juice, orange juice and distilledwater as control. Quantitative assessment of final surface micro-hardness was done at 2, 5 and7 days after immersion. The values obtained as base line and final vickers hardness number(VHN) for each specimen were subjected to statistical analysis. Results: Exposure to acidicbeverages decreased the surface micro-hardness of all the three restorative materials (P<0.05),while distal water did not affect the surface micro-hardness of any material. The resin modifiedGIC showed greatest reduction in surface micro-hardness as compared to Amalgam and ResinComposite. The cola produced the greatest degradation effect. Conclusion: Selection ofrestorative materials should be considered in patients with tooth surface loss, especially thosewith high risk for erosive conditions. In terms of materials evaluated for this study Amalgam andResin Composite provides the greatest stability under acidic conditions.

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Rozprawy doktorskie na temat "Dental materials"

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Ogden, Jill. "New dental materials." Thesis, Teesside University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411012.

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Gordon, Asia A. "Restorative dental materials." Thesis, Boston University, 2012. https://hdl.handle.net/2144/12399.

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Thesis (M.A.)--Boston University PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.<br>Restorative dentistry restores the function of the teeth and their surrounding structures. Patients may need dental restorative procedures due to disease, trauma, and esthetics purposes. The most prevalent dental disease is caries, which is treated by the removal of bacteria and the placement of a restorative material. This thesis aims to determine if the use of amalgam restoration should be discontinued in the United States. To determine if dental amalgam restorations should be discontinued the safety and of amalgam, composite, and ceramic materials will be evaluated. The objective is to review the current literature to determine if the use of amalgam is unethical and if composite and ceramic restorations can serve as a proper alternative. Restorative materials have been used for over 170 years and the contents in these materials have been very controversial. The first record of amalgam placement was in 659 AD in China through Material Medica. Since then, new advancements and different compositions have varied to increase the efficacy of amalgam restorations. Composite restorations became popular in the early 1960's and have drastically improved and are now comparable in compressible strength to amalgam restorations and are placed in posterior teeth. Porcelain, ceramics has been used in dentistry since the 1800's and has advanced through fabrication and cementation techniques. One fabrication technique of interest is the utilization of CEREC CAD/CAM systems. This system has also evolved and is now on its third generation; its original design included fabricated inlays and onlays only. Now, The CAD/CAM has evolved to fabricate inlays, onlays, crowns, and veneers. The use of dental amalgam has been shown through many studies to be safe and has an unmatched longevity record. Composites and porcelain ceramics are also successful to varying degree but do not have the longevity found with amalgam. These studies, demonstrates the use of amalgam in the United States is ethical, successful, cost effective, and should not be discontinued.

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Eriksson, Alexander. "Bioactivity testing of dental materials." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-382042.

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Ever since Hench et al. first discovered bioactive glass in 1969, extensive interest was created because of the materials ability to chemically bond with living tissue. In this project the bioactivity of three different compositions of the bioactive glass Na2O-CaO-SiO2 have been studied. The compositions of the different glasses were A (25% Na2O, 25% CaO and 50% SiO2), B (22.5% Na2O, 22.5% CaO and 55% SiO2) and C (20% Na2O, 20% CaO and 60% SiO2). Their bioactivity was tested through biomimetic evaluation, in this case by soaking samples of each glass in simulated body fluid (SBF) and phosphate buffered saline (PBS). After soaking, the samples were analyzed with Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), Grazing Incidence X-ray Diffraction (GIXRD) and Fourier-Transform Infrared Spectroscopy (FTIR) to analyze if hydroxyapatite formed on the glass surfaces. Both the A and B glass showed bioactivity in SBF and PBS, while the C glass did not. Further work is necessary to determine which of the A and B glass has the highest apatite formability and the reason why the C glass were not bioactive.

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Lawson, Nathaniel C. "Mechanical properties of dental impression materials." Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2008r/lawson.pdf.

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Konno, Alysson Noriyuki Kajishima. "Estudo de metodologias utilizadas na avaliação da resistencia mecanica da união composito-dentina." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288128.

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Orientador: Mario Alexandre Coelho Sinhoreti<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-04T04:07:19Z (GMT). No. of bitstreams: 1 Konno_AlyssonNoriyukiKajishima_D.pdf: 24874523 bytes, checksum: 97658ba2fa404bf2656d8ae6fbe35807 (MD5) Previous issue date: 2005<br>Resumo: O propósito desse estudo foi avaliar a resistência da união dentina¿compósito restaurador dos sistemas adesivos Clearfil SE Bond (CSEB) e Adper Single Bond (SB), através de 4 tipos de ensaios mecânicos: cisalhamento, tração, microcisalhamento e micro-tração. Para tanto, foram utilizados 52 incisivos bovinos que tiveram as coroas incluídas em resina de poliéster em tubos de PVC de 2cm de diâmetro interno, cujas faces vestibulares ficavam expostas em 1mm para que fosse permitido desgaste com lixas de granulação 180 e 400 sob refrigeração a água para expor o tecido dentinário. Para o ensaio de cisalhamento (CIS), foi delimitada uma área circular de 4mm de diâmetro na qual foram aplicados os sistemas adesivos. Um cilindro de compósito restaurador (Z250) de diâmetro igual ao diâmetro da área de união e altura de 5mm foi construído para o ensaio mecânico. O carregamento foi realizado à velocidade de 0,5mm/min. com o uso de uma tira metálica de 5mm de largura que envolvia todo o corpo-de-prova. Para o ensaio de tração (TR), o corpo-de-prova foi confeccionado com o uso de uma matriz metálica na qual um orifício interno de formato tronco-cônico com base maior de 6mm e menor de 4mm foi preenchido com compósito restaurador (Z250) e aderido na superfície pela base menor. O ensaio mecânico foi realizado à velocidade de 0,5mm/min e o carregamento foi realizado com o uso de um dispositivo metálico que envolvia o corpo-de-prova. Os corpos-de-prova para micro-cisalhamento (µ-CIS) foram realizados com o uso de tubos de Tygon (TGY-030) com diâmetro interno de 0,7mm e altura de 0,4mm na qual foi inserido compósito restaurador (Filtek Flow). O carregamento foi realizado com fio ortodôntico de 0,3mm de diâmetro que envolveu o cilindro de compósito próximo à área de união, à velocidade de 0,5mm/min. O teste de micro-tração (µ-TR) foi realizado com o uso de corpos-de-prova, nos quais se realizou um bloco de compósito restaurador (Z250) com 5mm de altura aderido à superfície dentinária e após seccionados de modo a obter corpos-de-prova em forma de palito com área seccional de 1mm². No ensaio mecânico, realizado à velocidade de 0,5mm/min, esses corpos-de-prova eram fixados em dispositivo metálico ligado á máquina de teste com o uso de cola de cianoacrilato (Super Bonder Gel). Os resultados mostram que o sistema CSEB apresentou valores de resistência maiores e estatisticamente diferentes (p>0,05) quando comparados ao sistema Adper Single Bond (CSEB/CIS=6,35MPa; SB/CIS=3,02MPa; CSEB/TR=12,43MPa; SB/TR=7,11MPa; CSEB/µ-CIS=36,52MPa; SB/µ-CIS=26,39MPa; CSEB/µ-TR=30,10MPa; SB/µ-TR=21,08MPa). O sistema CSEB apresentou falhas mistas/coesivas em dentina em todos os tipos de ensaio mecânico. O sistema SB apresentou falhas adesivas na maioria dos ensaios mecânicos<br>Abstract: The aim of this study was to evaluate the dentin-restorative composite strength of 2 adhesive systems Clearfil SE Bond (CSEB) and Single Bond (SB) using 4 different tests: Shear , Tensile, Micro-shear and Micro-tensile tests. 52 bovine incisors were used in this study which were cut and embedded in PVC tubes (20mm internal diameter, 40mm height) with polyester resin. Buccal surfaces were flattened with sandpaper grit number 180 and 400 under water refrigeration. For the shear bond (SH) strength tests, a circular area of 5mm in diameter was delimited and adhesive systems were applied according to the manufacturers' instructions. A composite cylinder (Z250) of 4mm diameter and 5mm height were built in the area. The loading occurred on Instron testing machine at crosshead speed of 0.5mm/min. using a metallic tape which evolved the cylinder. The tensile test (TEN) were run used samples made with use of a conical shape - metallic mould with 6mm and 4mm in diameter on the edges. The smaller edge was positioned on the surface and a composite put in its internal portion. The loading were carried out at crosshead speed of 0.5mm using a metallic device which evolved the sample. The microshear tests (µ-SH) were carried out using composite samples of 0.7mm in internal diameter in 0,4mm height, built by the use of Tygon tubes (TGY-030). Loading were carried out at crosshead speed of 0.5mm using an orthodontic wire loop (0.3mm). The micro-tensile tests (µ-TEN) were run using sticks with 1mm² of cross seccional area. These sticks were adhered to an testing device using cyanoacrilate glue (Super Bonder Gel) and tested using an Instron testing machine at crosshead speed of 0.5mm/min. Data showed that CSEB bonding system had higher values with statistical significance for all tests compared to SB bonding system (p>0.05) (CSEB/SH=6.35MPa; SB/SH=3.02MPa; CSEB/TEN=12.43MPa; SB/TEN=7.11MPa; CSEB/µ-SH=36.52MPa; SB/µ-SH=26.39MPa; CSEB/µ-TEN=30.10MPa; SB/µ-TEN=21.08MPa). The CSEB showed cohesive and mixed failure for all tests. SB bonding system showed adhesive failure for the most tests<br>Doutorado<br>Materiais Dentarios<br>Materiais Dentarios

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Hume, Wyatt Roderic. "Studies on the pharmacology and toxicology of materials applied to dentine /." Title page, contents and abstract only, 1988. http://web4.library.adelaide.edu.au/theses/09D/09dh922.pdf.

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Wang, Yan. "Hertzian indentation failure of dental restorative materials." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36528067.

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Wang, Yan, and 王焱. "Hertzian indentation failure of dental restorative materials." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B36528067.

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Guiraldo, Ricardo Danil. "Variações termicas ocorridas na camara pulpar em função de tecnicas de inserção e tipos de fotoativação de composito." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290118.

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Orientador: Simonides Consani<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-04T03:44:51Z (GMT). No. of bitstreams: 1 Guiraldo_RicardoDanil_M.pdf: 364199 bytes, checksum: 276b6a4ebf54255a1b8a3ee68f8b30de (MD5) Previous issue date: 2005<br>Resumo: O estudo avaliou o efeito dos tipos de incremento, de fotoativação e as fases restauradoras nas variações térmicas ocorridas na câmara pulpar, durante a fotoativação do compósito Filtek Z250. Foram utilizados 90 incisivos bovinos, nos quais foram feitos preparos cavitários (3x3x2,5mm) padronizados. Os dentes foram separados aleatoriamente em 3 grupos, de acordo com o tipo de fotoativação por luz halógena: 1- contínua (700 mW/cm2 por 20 s); 2- dupla intensidade (inicial de 100 mW/cm2 por 5 s, seguido de 700mW/cm2 por 15 s); 3- intermitente (2 s de ativação com 700mW/cm2, seguido do mesmo tempo pela ausência de luz, total de 40 s). Os grupos foram separados em 3 subgrupos segundo o tipo de incremento: 1- único; 2) oblíquos (três incrementos, um colocado nas paredes cervical e axial, outro nas paredes incisal e axial e o último unindo os dois); 3) horizontal/verticais (o horizontal foi colocado na parede axial, um vertical na parede cervical e o outro na parede incisal), totalizando 9 grupos (n=10). As cavidades foram condicionadas com ácido fosfórico por 20 s, o sistema de união Single Bond e o compósito Filtek Z250 aplicados segundo os protocolos de fotoativação e incremento. As restaurações foram realizadas em ambiente controlado (37ºC e 50±10% UR) e as temperaturas registradas com termômetro digital acoplado ao termopar tipo-K introduzido no canal radicular, de maneira que ficasse em contato com a dentina da câmara pulpar, correspondente à parede axial do preparo. Os dados obtidos foram submetidos à análise de variância e as médias ao teste de Tukey em níveis de 5% e 1%. A média de temperatura do incremento único (37,14ºC) foi significantemente menor que dos incrementos oblíquos (37,44ºC) e horizontal/verticais (37,43ºC). A luz contínua promoveu valor de temperatura (37,53ºC) estatisticamente superior aos demais tipos de luz, os quais não deferiram (37,27ºC e 37,21ºC). A fotoativação do adesivo foi estatisticamente maior (37,54ºC) que na aplicação do adesivo (36,82ºC) e na ativação do compósito (37,20ºC). Na interação tipo de incremento-tipo de fotoativação, na luz contínua o maior calor foi promovido pelo incremento horizontal/verticais, estatisticamente diferente dos demais. Na dupla intensidade, a maior temperatura foi no incremento oblíquo, diferente dos demais, enquanto na pulsátil não houve diferença. Para o incremento único não houve diferença quanto à fotoativação, enquanto no oblíquo a luz pulsátil promoveu valor significantemente menor. No incremento horizontal/verticais, a luz contínua foi estatisticamente superior. Na interação tipo de incremento-fase restauradora, o calor do incremento único foi estatisticamente superior na fotoativação do adesivo, seguido pela fotoativação do compósito e aplicação do adesivo. Para os incrementos oblíquo e horizontal/verticais, a fase aplicação do adesivo foi significantemente menor. Para as fases restauradoras não houve diferença estatística entre aplicação e fotoativação do adesivo, entretanto na fotoativação do compósito, o incremento único foi significantemente menor. Na interação tipo de fotoativação-fase restauradora, em todas as fotoativações não houve diferença estatística no calor das fotoativações dos adesivo e compósito, diferindo estatisticamente da fase aplicação do adesivo. Para as fotoativações do adesivo e do compósito, o calor produzido pela luz contínua foi significantemente maior, enquanto na aplicação do adesivo não houve diferença estatística. Houve influência das variáveis sobre o calor que atingiu a câmara pulpar<br>Abstract: This study evaluated the effect of the increment insertion and light-curing methods on thermal variations in the pulp chamber during Filtek Z250 composite resin light-curing. Standard cavities (3x3x2.5mm) were prepared in 90 bovine incisors. The teeth were randomly assigned into 3 groups, according to each light-curing method: 1- continue halogen light (700 mW/cm2 per 20s); 2- halogen light with a soft-start mode (initial intensity of 100 mW/cm2 per 5s obtained with a spacer and 700mW/cm2 per 15s, totalizing 20s); 3- intermittent halogen light (2s of activation with 700mW/cm2, followed by the same time of light absence, totalizing 40s). All groups were divided into 3 subgroups according to each type of increment: 1- bulk; 2- oblique (three increments, one in the cervical and axial walls, one in the incisal and axial walls, and finally one joining the the other two); 3- horizontal/vertical (the horizontal in the axial wall, one vertical in the cervical wall and another vertical in the incisal wall), totalizing 9 groups (n=10). All cavities were etched with phosphoric acid for 20s; the adhesive system Single Bond and the resin composite Filtek Z250 were applied according to the types of light-curing and increment. All experiments were carried out in controlled environment (37 Celsius degree and 50±10% relative humidity). The temperature variations (Celsius degree) were obtained using a digital thermometer attached to a type-K thermocouple which was inserted into the root canal as to be in contact with the pulp chamber dentine, correspondent to the axial wall of the cavity. Data were submitted to ANOVA and mean values compared by the Tukey¿s test with significance levels of 5% and 1%. The mean temperature (37.14) of the bulk increment was significantly lower than that oblique (37.44) and horizontal/verticals (37.43) increments. The continue light-curing revealed temperature mean values (37.53) statistically higher than those observed for the other types of light (37.27 and 37.21), which did not differ from each other. The adhesive light-curing showed statistically higher temperatures (37.54) than those observed during the adhesive application (36.82) and resin composite light-curing (37.20). In relation to the interaction between the light-curing method and type of increment, the horizontal/vertical increment under continue halogen light showed the highest temperature values, statistically different from the others. As for the soft-start light-curing method, the highest temperature was observed for the oblique increment, statistically different from others; no difference was observed for the intermittent halogen light. For the bulk increment, no statistically significant differences were observed among groups concerning the light-curing methods; however, in the oblique increment, the intermittent light revealed lower temperature values. For the horizontal/vertical increment, the continue light-curing temperature was statistically higher. For the interaction between type of increment and the restorative phase, the bulk increment heat was statistically higher in the adhesive light-curing phase, followed by the resin composite light-curing and adhesive application. The horizontal/vertical and oblique increments revealed significantly lower temperature values during adhesive application. In the restorative phases, no difference was observed between adhesive application and adhesive light-curing. However, in the resin composite light-curing, the bulk increment showed significantly lower temperature values. For the interaction between type of light-curing and restorative phase, no statistical difference was observed for all light-curing methods concerning adhesive and resin composite light-curing, differing only in the adhesive application phase. For the adhesive and resin composite light-curing phases, the heat produced by continue light was significantly higher. No statistically significant difference was verified for adhesive application. There was influence of the variables on the heat that reached the pulpar chamber<br>Mestrado<br>Materiais Dentarios<br>Mestre em Materiais Dentários

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Fernandes, Daniela Rodrigues. "Influencia da refusão de uma liga de niquel-cromo na adaptação cervical e interna de coroas totais com diferentes configurações marginais." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290119.

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Orientador: Simonides Consani<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-04T20:49:18Z (GMT). No. of bitstreams: 1 Fernandes_DanielaRodrigues_D.pdf: 2902457 bytes, checksum: 3296ab64fe21504cb62f4540283146c3 (MD5) Previous issue date: 2005<br>Resumo: O objetivo deste trabalho foi verificar a influência da fonte de calor na fusibilidade e dureza de uma liga comercial à base de Ni-Cr (VERA BOND 11) nova, refundida (100%) e nova acrescida de sobras (50%). Para análise da fusibilidade foram confeccionadas 10 amostras para cada condição de liga, com uma tela para peneira de poliéster, com 11 X 11 filamentos de 0,22 mm de espessura, perfazendo uma malha de 100 espaços quadrados fixada bilateralmente por toda a extensão em fios de cera de 2,5 mm, contendo um pino formador do canal de alimentação no vértice. Para análise da dureza foram confeccionadas pastilhas em cera azul regular, com 8,0 mm de diâmetro por 2,0 mm de espessura, unidas a um pino formador do canal de alimentação. Após a obtenção dos padrões, estes foram fixados à base formadora do cadinho, de forma que a distância da base à câmara de reserva fosse 0,5 cm. Uma solução redutora da tensão de superfície foi aplicada sobre o padrão e após a secagem, este foi incluído em revestimento fosfatado - Termocast (Polidental, São Paulo Brasil) manipulado a vácuo, seguindo as instruções do fabricante quanto a proporção e tempo de manipulação. Os anéis foram aquecidos em forno elétrico (EDG) até atingirem a temperatura de 900°C, quando foram preenchidos por aproximadamente 15 gramas de liga fundida pela fonte de calor maçarico de fusibilidade, com o auxílio de um microscópio comparador com aumento de 16 X, considerando o número de espaços preenchidos no molde pela liga. Para análise da dureza superficial Rockwell 30T, os corpos-de-prova foram incluídos em resina acrílica quimicamente ativada, polidos e levados ao aparelho de dureza Testor HTI Super-Panambra, onde foram realizadas as medidas e obtidas as médias. Os resultados foram submetidos à análise de variância e as médias comparadas pelo teste de Tukey, em nível de significância de 5%. Quando foram comparadas as fontes de calor com os diferentes tipos de liga houve diferença estatística significativa entre as fontes de calor, na qual o aquecimento por indução demonstrou melhores resultados para fusibilidade. Não houve diferença estatística significativa nos valores médios de dureza quando foi utilizada a fonte de calor maçarico e aquecimento por indução para as ligas virgem e mista, porém o aquecimento por indução demonstrou melhores resultados que o maçarico, diferindo estatisticamente os valores de dureza, quando da utilização da liga refundida<br>Abstract: The aim of the present study was to verify the influence of the heat source on the castability and hardness of a Ni-Cr-based commercial alloy ¿ VERA BONO II - in three different conditions: new (first use), recast, and new mixed with scraps. In order to evaluate castability, 10 specimens were made for each alloy condition, using a polyester sieve with 11x11 filaments, 0.22mm thick, resulting in a screen with 100 square spaces. This screen was fixed to 0.25mm threads along the extension of two sides, and a post was fixed to its vertex. In order to perform hardness analysis, circular specimens made of regular blue wax measuring 8.0 mm in diameter and 2.0 mm thick were connected to the post, forming the sprue. The patterns were then fixed to the casting chamber, so that the distance from the base to the reservoir was 0.5 cm. A surface tension-reducing solution was abundantly applied to the patterns and after drying, the patterns were embedded into a phosphate-bonded investment - Termocast (Polidental, São Paulo, Brazil) manipulated under vacuum pressure, following manufacturer's instructions regarding proportions and manipulation times. Casting rings were placed in an electric oven (Bravac) until the temperature of 900°C was reached, and were then filled with approximately 15 grams of alloy, molten either by an oxigen/acethylen gas torch or by induction as heat sources. Following this procedure, castability evaluate hardness Rockwell 30T, specimens were embedded in chemically activated acrylic resin and then placed on a Testor HTI Super-Panambra hardness teste r. Hardness values for each specimen were obtained, and the average hardness was calculated. Results were submitted to analysis of variance and averages were compared by Tukey's test at 5% probability. There were statistically significant differences between the heat sources applied to the different types of alloy, with induction presenting the best castability results. There were no statistically significant differences in the average hardness values between torch or induction as the heating source for new and mixed alloys, although induction showed the best results, leading to statistically significant differences in hardness, when recast alloy was used.<br>Doutorado<br>Doutor em Materiais Dentários

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Książki na temat "Dental materials"

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McCabe, J. F. Applied dental materials. 9th ed. Oxford, UK: Blackwell Pub., 2008.

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Combe, E. C. Dental biomaterials. Boston: Kluwer Academic, 1999.

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D, Kaminski Haden, and DuPois Easton A, eds. Dental materials research. Hauppauge, NY: Nova Science Publishers, 2009.

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Braden, Michael, Richard L. Clarke, Sandra Parker, and John Nicholson. Polymeric Dental Materials. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60537-6.

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1923-, Craig Robert G., and Powers John M. 1946-, eds. Restorative dental materials. St. Louis: Mosby, 2002.

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Angus, Walls, ed. Applied dental materials. 8th ed. Oxford: Blackwell Science, 1998.

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Braden, Michael. Polymeric Dental Materials. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997.

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Vanable, Eleanor D. Using dental materials. Upper Saddle River, N.J: Pearson/Prentice Hall, 2004.

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1928-, Braden Michael, ed. Polymeric dental materials. Berlin: Springer, 1997.

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T, Hanks Carl, ed. Restorative dental materials. 9th ed. St. Louis: Mosby, 1993.

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Części książek na temat "Dental materials"

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Isaksson, Marléne. "Dental Materials." In Quick Guide to Contact Dermatitis, 195–204. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-47714-4_17.

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Isaksson, Marléne. "Dental Materials." In Contact Dermatitis, 763–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-03827-3_39.

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Helsen, Jozef A., and Yannis Missirlis. "Dental Materials." In Biological and Medical Physics, Biomedical Engineering, 191–217. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12532-4_10.

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Bhat, Sujata V. "Dental Materials." In Biomaterials, 194–206. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0328-5_12.

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Braden, Michael, Richard L. Clarke, Sandra Parker, and John Nicholson. "Elastomeric Materials." In Polymeric Dental Materials, 91–124. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60537-6_3.

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Black, Jonathan, and Garth Hastings. "Dental Restoration Materials." In Handbook of Biomaterial Properties, 201–13. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5801-9_17.

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Reza Rezaie, Hamid, Hassan Beigi Rizi, Mojdeh Mahdi Rezaei Khamseh, and Andreas Öchsner. "Dental Restorative Materials." In Advanced Structured Materials, 47–171. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48931-1_3.

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Nakai, Masaaki, and Mitsuo Niinomi. "Dental Metallic Materials." In Springer Series in Biomaterials Science and Engineering, 251–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46842-5_12.

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Bergmann, Carlos P., and Aisha Stumpf. "Microstructure of Ceramic Materials." In Dental Ceramics, 31–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38224-6_5.

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Bergmann, Carlos P., and Aisha Stumpf. "Ceramic Materials for Orthodontic Use." In Dental Ceramics, 23–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38224-6_4.

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Streszczenia konferencji na temat "Dental materials"

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Xu, Jinyang, Pengjie Gao, and Min Ji. "Recent developments in fabrication of dental zirconia ceramics." In International Conference on New Materials, Machinery, and Vehicle Engineering 2024, edited by Jinyang Xu and J. Paulo Davim, 19. SPIE, 2024. http://dx.doi.org/10.1117/12.3054941.

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Cournault, Bérangère, Luc Vedrenne, Teyagirwa Prudence Felix, Erkel Arnaud, Hattenberger Grégoire, Jmal Hamdi, Kharouf Naji, and Etienne Olivier. "Optimizing Failure Mode Analysis of Dental Restorative Materials: Balancing Efficiency and Accuracy." In 2024 IEEE International Symposium on Biomedical Imaging (ISBI), 1–5. IEEE, 2024. http://dx.doi.org/10.1109/isbi56570.2024.10635471.

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Savvova, Oksana, Oleksii Fesenko, Olena Babich, Ihor Yanishyn, Olena Fedotova, and Inna Zaitseva. "Basic Principles of Creation of Biomimetic Glass-Ceramic Materials for Dental Use." In 2024 IEEE 5th KhPI Week on Advanced Technology (KhPIWeek), 1–6. IEEE, 2024. https://doi.org/10.1109/khpiweek61434.2024.10878099.

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Dabrowski, M., R. Dulski, S. Zmuda, and P. Zaborowski. "Emission properties of dental materials and hard dental tissues." In 2000 Quantitative InfraRed Thermography. QIRT Council, 2000. http://dx.doi.org/10.21611/qirt.2000.003.

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Chun, Keyoung Jin, Hyun Ho Choi, and Jong Yeop Lee. "A Comparative Study of Mechanical Properties of Tooth Reconstruction Materials." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63106.

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Tooth reconstruction materials are used to reconstruct damaged teeth as well as to recover their functions. In this study, the mechanical properties of various tooth reconstruction materials were determined using test specimens of identical shape and dimension under the same compressive test condition; the hardness values of them were obtained from previous studies and compared with those of enamel and dentin. Amalgam, dental ceramic, dental gold alloy, dental resin, zirconia and titanium were processed as tooth reconstruction material specimens. For each material, 10 specimens having a of 3.0 × 1.2 × 1.2 mm (length × width × height) were used. The stresses, strains, and elastic moduli of amalgam, dental ceramic, gold alloy, dental resin, zirconia, and titanium alloy were obtained from the compressive test. The hardness values of amalgam, dental ceramic, gold alloy, dental resin, zirconia, and titanium alloy were obtained from the references [14–19]. And, the stresses, strains, elastic moduli, and the hardness values of enamel and dentin were obtained from the reference [13]. The mechanical role of enamel is to crush food and protect dentin because of its higher wear resistance, and that of dentin is to absorb bite forces because of its higher force resistance. Therefore, the hardness value should be prioritized for enamel replacement materials, and mechanical properties should be prioritized for dentin replacement materials. Therefore, zirconia and titanium alloy were considered suitable tooth reconstruction materials for replacing enamel, and gold alloy, zirconia, and titanium alloy were considered suitable tooth reconstruction materials for replacing dentin. However, owing to the excessive mechanical properties and hardness values of zirconia and titanium alloy, these may show poor biocompatibility with natural teeth. Thus far, no tooth reconstruction material satisfies the requirements of having both a hardness value similar to that of enamel and mechanical properties similar to those of dentin.

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Yanenko, A. P., S. N. Peregudov, A. D. Golovchanskaya, and A. D. Krasiuk. "Electromagnetic identification of dental materials." In 2010 20th International Crimean Conference "Microwave & Telecommunication Technology" (CriMiCo 2010). IEEE, 2010. http://dx.doi.org/10.1109/crmico.2010.5632951.

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Matsibura, A. P., S. N. Peregudov, A. P. Janenko, and A. D. Golovchanskaya. "Microwave estimation of dental materials." In 2005 15th International Crimean Conference Microwave and Telecommunication Technology. IEEE, 2005. http://dx.doi.org/10.1109/crmico.2005.1565194.

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Chun, K. J., C. Y. Kim, and J. Y. Lee. "A Study on Mechanical Behavior of Dental Hard Tissues and Dental Restorative Materials by Three-Point Bending Test." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36645.

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Dental restorative materials including amalgam, dental ceramic, gold alloy, dental resin, zirconia, and titanium alloy are used to reconstruct damaged teeth, as well as to recover their function. In this study, the mechanical properties of various dental restorative materials were determined using test specimens of identical shape and dimension under the same three-point bending test condition, and the test results were compared to enamel and dentin. The maximum bending force of enamel and dentin was 6.9 ± 2.1 N and 39.7 ± 8.3 N, and the maximum bending deflection was 0.12 ± 0.02 mm and 0.25 ± 0.03 mm, respectively. The maximum bending force of amalgam, dental ceramic, gold alloy, dental resin, zirconia, and titanium alloy were 1.9 ± 0.4 N, 2.7 ± 0.6 N, 66.9 ± 4.1 N, 2.7 ± 0.3 N, 19.0 ± 2.0 N, and 121.3 ± 6.8 N, respectively, and the maximum bending deflection was 0.20 ± 0.08 mm, 0.28 ± 0.07 mm, 2.53 ± 0.12 mm, 0.37 ± 0.05 mm, 0.39 ± 0.05 m, and 2.80 ± 0.08 mm, respectively. The dental restorative materials that possessed greater maximum bending force than that of enamel were gold alloy, zirconia, and titanium alloy. Gold alloy and titanium alloy had greater maximum bending force than dentin. The dental restorative materials that possessed greater maximum bending deflection than that of enamel were all of the dental restorative materials, and the dental restorative materials that possessed greater maximum bending deflection than that of dentin were all of the dental restorative materials except amalgam. The appropriate dental restorative materials for enamel are gold alloy and zirconia and for dentin is gold alloy concerning the maximum bending force and the maximum bending deflection. These results are expected to aid dentists in their choice of better clinical treatment and to contribute to the development of dental restorative materials that possess properties that are most similar to the mechanical properties of dental hard tissue.

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Dabrowski, M., R. Dulski, P. Zaborowski, and St Zmuda. "Emissivity of the popular dental materials." In 2006 Quantitative InfraRed Thermography. QIRT Council, 2006. http://dx.doi.org/10.21611/qirt.2006.004.

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OCELÍK, VÁCLAV, ULF SCHEPKE, HAMID HAJI RASOUL, MARCO S. CUNE, and JEFF TH M. DE HOSSON. "SURFACE DEGRADATION OF NANOCRYSTALLINE ZIRCONIA DENTAL IMPLANTS." In MATERIALS CHARACTERISATION 2017. Southampton UK: WIT Press, 2017. http://dx.doi.org/10.2495/mc170371.

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Raporty organizacyjne na temat "Dental materials"

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Hwang, Yoon Y., Jonathan M. Stahl, and Wayne M. Deutsch. Testing of DentStat (trademark) and Competing Dental Materials. Fort Belvoir, VA: Defense Technical Information Center, June 2014. http://dx.doi.org/10.21236/ada604226.

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Cheadle, Alice, Reece Bushell, Phillip Tomson, William Palin, Gowsihan Poologasundarampillai, Mohammed Hadis, and Zehra Yonel. Tactile Perception of Materials Used for the Production of 3D-Printed Typodont Teeth in Dental Education: A Systematic Review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, February 2025. https://doi.org/10.37766/inplasy2025.2.0062.

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MALDONADO, KARELYS, JUAN ESPINOZA, DANIELA ASTUDILLO, and WILSON BRAVO. Fatigue and fracture resistance and survival of occlusal veneers of composite resin and ceramics blocks in posterior teeth with occlusal wear: A protocol for a systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, October 2021. http://dx.doi.org/10.37766/inplasy2021.10.0036.

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Review question / Objective: The aim of this systematic review is to synthesize the scientific evidence that evaluates fatigue and fracture resistance, survival, and stress distribution, of composite resin CAD/CAM and ceramic CAD/CAM occlusal veneers in posterior teeth with severe occlusal wear. Condition being studied: Currently there is an increase in cases of dental wear, due to several factors such as: excessive consumption of carbonated drinks, a diet high in acids, gastric diseases, anorexia, bulimia, dental grinding, use of highly abrasive toothpastes, or a combination of these(9) (10) (11) (12); which affect the patient in several aspects: loss of vertical dimension, sensitivity due to the exposure of dentin, esthetics, affectation of the neuromuscular system(11) (13) (14). With the advent of minimally invasive dentistry, occlusal veneers have been found to be a valid option to rehabilitate this type of cases and thus avoid greater wear of the dental structure with full coverage restorations. Sometimes when performing a tabletop it is not necessary to perform any preparation, thus preserving the maximum amount of dental tissue(3) (6) (15). Due to the masticatory load either in patients without parafunction where the maximum masticatory force is approximately 424 N for women and 630 N for men or in those who present parafunction where the maximum bite force can vary from 780 to 1120N(7), it is necessary that the occlusal veneers support that load which makes indispensable a compilation of studies investigating both fatigue and fracture resistance and the survival rate of occlusal veneers in different materials and thicknesses.

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Saini, Ravinder, Saheer Mohammad, Artak Heboyan, Rajinder Bansal, and Venu Madhav. Balancing Bioactivity and Strength: A Systematic Review of Fluoride Release and Mechanical Properties of S-PRG Fillers in Dental Materials. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, April 2025. https://doi.org/10.37766/inplasy2025.4.0107.

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Tiku, Sanjay, Aaron Dinovitzer, Vlad Semiga, and Binoy John. PR-214-073510-Z01 FS Fatigue Testing Plain Dents+Dents Interacting with Welds and Metal Loss with Data. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2018. http://dx.doi.org/10.55274/r0011514.

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Dents in buried pipelines occur due to a number of potential causes; the pipe resting on rock, third party machinery strike, rock strikes during backfilling, amongst others. The long-term integrity of a dented pipeline segment is a complex function of a variety of parameters, including pipe geom-etry, indenter shape, dent depth, indenter support, pressure history at and following indentation. In order to estimate the safe remaining operational life of a dented pipeline, all of these factors must be accounted for in the analysis. In order to characterize the severity of a dent on the integrity of a pipeline system, there must first be sufficient information available describing the behavior of the deformed pipe when subjected to typical loading scenarios. While there have been a number of full scale test programs that have been used to develop general trends in the behavior of dented pipe subjected to cyclic pressure loads, these programs have not produced sufficiently detailed information in terms of material properties, dent and pipe response to pressure loading, to form the basis of a severity assessment criterion. The objective of the current project was to generate full scale dent fatigue test data necessary to develop, validate and/or evaluate dent models capable of predicting cyclic internal pressure related failures of a pipe segment. The data generated included: detailed material characterization of the pipes involved in full scale test program, dent profile measurement, dent strains during dent for-mation and cyclic loading and recording of the details of fatigue crack location and orientation within a dent. The test program developed detailed experimental data for: - Unrestrained plain dents, - Restrained plain dents, - Dents interacting with welds and - Dents interacting with metal loss.

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Tiku, Sanjay, Amin Eshraghi, Aaron Dinovitzer, and Arnav Rana. PR-214-114500-R01 Fatigue Life Assessment of Dents with and without Interacting Features. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), December 2018. http://dx.doi.org/10.55274/r0011540.

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The long-term integrity of a dented pipeline segment is a complex function of a variety of parameters, including pipe geometry, indenter shape, dent depth, indenter support, pressure history at and following indentation. In order to estimate the safe remaining operational life of a dented pipeline, all of these factors must be accounted for in the assessment. The current project provides pipeline operators with a methodology for assessing and managing dent fatigue, thus making it possible to prioritize response and remedial action(s) in an informed manner. The methodology allows the users to carry out dent ranking/prioritization and dent fatigue life assessment. In addition to the development of the plain dent fatigue life assessment methodology, dent weld and dent metal loss interaction criteria have been developed to ascertain their effect on the fatigue life of a dent. The dent assessment methodology utilizes dent shape information that can be derived from in-line inspection (ILI) data, operating pressure spectra and pipeline material grade. A three-level approach has been developed for assessing the fatigue life or cyclic pressure loading dependent fail-ure of pipeline dents. All three assessment levels draw upon information regarding pipeline operational, material and mechanical damage data. The assessment level selection and accuracy of the results are based upon the complexity of the features, the availability of required data and the level of detail and certainty in the input data. The three levels provide a range of alternatives for integrity management, where the appropriate method to use is dependent on the desired outcome and the available information.

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Herrera-Muñoz, Stella María. Elaboración de provisionales de autocurado para prótesis parcial fija o coronas individuales. Ediciones Universidad Cooperativa de Colombia, December 2020. http://dx.doi.org/10.16925/gcgp.29.

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Con esta guía para la elaboración de provisionales de autocurado para prótesis parcial fija o coronas individuales se espera tener una ruta clara para las prácticas de preclínica de los alumnos en modelos tipo Odonto, los cuales simulan las arcadas dentales de pacientes edéntulos parciales. La provisional es un dispositivo temporal que brinda a la estructura protección para la pulpa, restaura la función, la estabilidad y da la estética requerida por el paciente, ya que sirve para proyectar el tratamiento definitivo. Para la elaboración de la provisional de autocurado se debe considerar la morfología dental, la selección del color del material restaurador, la preparación del diente pilar (evaluando en esta la definición de la línea terminal), la vía de inserción, el espacio interoclusal e interproximal, los cuales son componentes de los principios de tallado. El material de elección para elaborar provisionales es la resina acrílica, que está compuesta por monómero y polímero, material que cuenta con apropiadas características de estabilidad, y con un fácil y rápido manejo, lo cual ayuda al operador a obtener excelentes resultados. Las técnicas que se manejan para la realización de dicho procedimiento son: cáscara de huevo y en bloque; la diferencia entre estas dos es la utilización del encerado diagnóstico y la elaboración de una matriz en silicona. Con esta guía se busca que los estudiantes adquieran conocimientos, habilidades y destrezas para la atención de sus pacientes.

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Tiku, Sanjay, Arnav Rana, Binoy John, and Aaron Dinovitzer. PR-214-203805-R01 Performance Evaluation of ILI Systems for Dents and Coincident Features. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), March 2024. http://dx.doi.org/10.55274/r0000056.

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Pipeline integrity management involves the analysis of pipeline condition information (e.g., pipe size, presence and size of features), operational/environmental conditions and line pipe material properties in engineering assessment (fitness-for-purpose) tools to evaluate operational risk. While nominal or minimum specified material properties and SCADA reported, design or estimated operational loading conditions can be considered, pipeline operators depend heavily on pipeline condition data from in-line inspection (ILI) systems. The current project presents the details of performance trials evaluating the ability of ILI systems to provide pipeline condition information for dents with coincident or closely aligned features. A set of sample dent features were prepared along with a trial protocol and performance metrics beyond those presented in API 1163 that were used to characterize performance. ILI system pull and pump through trials of magnetic, ultrasonic and caliper-based ILI technologies from four ILI Service Providers were performed. Data from these trials were used to quantify detection, identification, and sizing performance of the ILI systems for isolated corrosion features, dents with variety of shapes including those without coincident features and those with corrosion, gouges and/or cracks. The effect of dents on the ILI system detection, identification and sizing of the coincident features was evaluated.

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Tiku, Sanjay. PR-214-203820-R01 Performance Evaluation of ILI for Dents with Cracks and Gouges. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), July 2023. http://dx.doi.org/10.55274/r0000031.

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Pipeline integrity management involves the analysis of pipeline condition information (e.g., pipe size, presence and size of features), operational/environmental conditions and line pipe material properties in engineering assessment (fitness-for-purpose) tools to evaluate operational risk. While nominal or minimum specified material properties and SCADA reported, design or estimated operational loading conditions can be considered, pipeline operators depend heavily on pipeline condition data from in-line inspection (ILI) systems. The current project presents the details of performance trials evaluating the ability of ILI systems to provide pipeline condition information for dents with coincident or closely aligned features. A set of sample dent features were prepared along with a trial protocol and performance metrics beyond those presented in API 1163 that were used to characterize performance. ILI system pull and pump through trials of magnetic, ultrasonic and caliper-based ILI technologies from seven ILI Service Providers were performed. Data from these trials were used to quantify detection, identification, and sizing performance of the ILI systems for isolated corrosion features, dents with variety of shapes including those without coincident features and those with corrosion, gouges and/or cracks. The effect of dents on the ILI system detection, identification and sizing of the coincident features was evaluated.

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Lertchirakarn, Veera, and Prasit Pavasant. The effects of fluocinolone acetonide on human cultured dental pulp cell in vitro. Chulalongkorn University, 2008. https://doi.org/10.58837/chula.res.2008.15.

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The purpose of treatment of pulpal exposure is to preserve vitality, healthy and promote healing of exposed pulp tissue. Fluocinolone acetonide (FA) may have a potential to promote tissue healing. The aim of this study was therefore to investigate the effects of FA on human cultured dental pulp cell in vitro. The MTT assay was performed to examine both cytotoxicity and prolifration of FA at 24, 48 and 72 hours. The results revealed that FA (0.1 to 50 [mu]M) had no cytotoxicity effect. In addition, these doses also stimulated cell proliferation. There was a significant increase of cell proliferation at low concentrations (0.1 and 1 [mu]M) after 48 hours (p<0.05). However, all doses of FA showed statistically significant difference in cell proliferation at 72 hours (p<0.05). The effect of FA on fibronectin synthesis was examined by Western blot analysis from cell extracted for 48 hours. The results showed that FA stimulated the synthesis of fibronectin in reverse dose-dependent manner. The Western blot analysis was performed to examine the effect of FA on type I collagen synthesis at 5 days. The result showed that 1 and 10 [mu]M of FA significantly stimulated the synthesis of collagen for about 2-fold (p<0.05). The result was confirmed by reverse transcription polymerase chain reaction (RT-PCR) which indicated that 1 [mu]M FA could significantly induce the expression of type I collagen mRNAs for about 2.8 times (p<0.05). The activity of alkaline phosphatase was detected at 24 and 72 hours and showed no statistically significant difference in any group at 24 hours (p>0.05). However, after 72 hours all doses of FA decreased alkaline phosphatase activity in a dose-dependent manner. Long term cultures were done to examine the in vitro calcification. After 28 days, the result showed no difference between FA-treated groups and the controls. These results demonstrated that FA enhances the effect on proliferation, fibronectin and type I collagen synthesis but not in calcification process. The results suggested that FA may be the potential substance as a pulp capping material.

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