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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The association between functional foods and dental caries experience /

Hitimana, Hilina. January 2009 (has links)
Objective: To investigate the association between functional foods and dental caries experience in Quebec children. Methodology: A cross-sectional analysis of the baseline wave of the QUALITY cohort was conducted and included a total of 195 children aged 8-10 years. Dietary information was collected by the use of 24--hour recalls. The adequate and inadequate intakes of specific nutrients were assessed in order to create a functional foods index. Dental caries experience was measured by DMF-S index and further categorized into presence and absence of caries. Data were collected on socio-demographic, oral health behaviour and anthropometric measures (height and weight). Data analysis involved logistic regression. Results: Girls eating functional foods were 89% less likely to have 1 decayed or filled tooth. [OR= 0.11 95% CI= (0.01-0.92)]. Conclusion: Functional foods had a protective effect against dental caries, specifically among girls in this sample of children.
2

The association between functional foods and dental caries experience /

Hitimana, Hilina. January 2009 (has links)
No description available.
3

Studies on the remineralization of white spot lesions : longitudinal assessment with quantitative light-induced fluorescence /

Al-Khateeb, Susan. January 1900 (has links)
Diss. (sammanfattning) Stockholm : Karol. inst. / Härtill 6 uppsatser.
4

Efeito do extrato da folha de Psidium cattleianum na expressão protéica de Streptococcus mutans, no biofilme bacteriano e na desmineralização do esmalte /

Brighenti, Fernanda Lourenção. January 2008 (has links)
Resumo: Produtos naturais têm sido estudados com relação ao controle químico da microbiota patogênica do biofilme bucal. O objetivo desse estudo foi esclarecer o efeito do extrato da folha de Psidium cattleianum no metabolismo de S. mutans, no biofilme formado in situ e na capacidade em inibir a desmineralização do esmalte. O extrato foi obtido por decocção das folhas em água deionizada. O efeito do extrato foi avaliado in vitro com relação à viabilidade, expressão protéica e produção de ácido de biofilmes de S. mutans. No estudo in situ, blocos de esmalte bovino foram fixados em dispositivos acrílicos palatinos de dez voluntários. A fase experimental consistiu de três etapas de 14 dias cada, separadas por intervalo de sete dias. Os voluntários gotejaram solução de sacarose 20% (8x/dia) e a solução de tratamento (água, extrato ou um enxaguatório comercial; 2x/dia). O biofilme dentário foi analisado quanto à acidogenicidade, quantidade microorganismos e presença de polissacarídeos álcali-solúveis. Nos blocos de esmalte, foram realizadas as análises de microdureza superficial e em secção longitudinal. O extrato foi capaz de afetar a viabilidade, a produção de ácidos e a síntese protéica do biofilme formado in vitro. No biofilme formado in situ, o extrato foi capaz de diminuir a queda do pH, o acúmulo de microorganismos, a formação de polissacarídeos extracelulares e a desmineralização do esmalte. Conclui-se que o extrato foi capaz de diminuir a expressão de proteínas envolvidas no metabolismo bacteriano, a patogenicidade do biofilme bucal e a desmineralização do esmalte in situ. / Abstract: Natural products have been studied with relation to chemical control of pathogenical microorganisms of dental biofilm. The aim of this study was to clarify the effect of Psidium cattleianum leaf extract on S. mutans metabolism, on in situ biofilms and on enamel demineralization. The extract was obtained by decoction in deionized water. The extract was studied in vitro with relation to viability, protein expression and acid production of S. mutans biofilms. On the in situ study, enamel bovine blocks were placed in palatal appliances of ten volunteers. The experimental phase consisted of three stages with a duration of 14 days each and a washout period of seven days. The volunteers dripped 20% sucrose (8x/day) and the treatment solution (water, extract or a marketed mouthwash - 2x/day) on the enamel blocks. The dental biofilm was analyzed regarding the amount of microorganisms and presence of alkalisoluble polysaccharides. On the enamel blocks, surface and cross-sectional microhardnessess were evaluated. The extract was able to affect the viability, acid production and protein synthesis of the in vitro biofilm. On the in situ biofilm, the extract was able to decrease pH drop, microorganism accumulation, extracellular polysaccharides formation and enamel demineralization. It can be concluded that the extract was able to reduce the expression of proteins involved on bacterial metabolism, the pathogenicity of dental biofilm and in situ enamel demineralization. / Orientador: Alberto Carlos Botazzo Delbem / Coorientador: Elerson Gaetti-Jardim Júnior / Banca: Marília Afonso Rabelo Buzalaf / Banca: Cínthia Pereira Machado Tabchoury / Banca: Cristina Antoniali Silva / Banca: Maria Aparecida de Andrade Moreira Machado / Doutor
5

The effect of Dodonaea viscosa var. angustifolia on oral pathogens

Naidoo, Roxanne January 2012 (has links)
Dissertation submitted to the Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science in Medicine. Johannesburg 2012. / Dental caries and periodontal diseases are the most common bacterial oral infections in humans. Prevention and treatment of these infections are oral hygiene measures including antimicrobial compounds which can be chemical agents or natural products. Dodonaea viscosa var. angustifolia is an indigenous South African plant that has antibacterial, antiviral and anticandida properties. This study investigated the antibacterial and antivirulence effect of D. viscosa var. angustifolia on cariogenic bacteria and the causative organisms of periodontal diseases.
6

Efeito do extrato da folha de Psidium cattleianum na expressão protéica de Streptococcus mutans, no biofilme bacteriano e na desmineralização do esmalte

Brighenti, Fernanda Lourenção [UNESP] 07 March 2008 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:33:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-03-07Bitstream added on 2014-06-13T21:05:40Z : No. of bitstreams: 1 brighenti_fl_dr_araca.pdf: 927914 bytes, checksum: df4ad06d38d262a61b9312138e94b9a9 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Produtos naturais têm sido estudados com relação ao controle químico da microbiota patogênica do biofilme bucal. O objetivo desse estudo foi esclarecer o efeito do extrato da folha de Psidium cattleianum no metabolismo de S. mutans, no biofilme formado in situ e na capacidade em inibir a desmineralização do esmalte. O extrato foi obtido por decocção das folhas em água deionizada. O efeito do extrato foi avaliado in vitro com relação à viabilidade, expressão protéica e produção de ácido de biofilmes de S. mutans. No estudo in situ, blocos de esmalte bovino foram fixados em dispositivos acrílicos palatinos de dez voluntários. A fase experimental consistiu de três etapas de 14 dias cada, separadas por intervalo de sete dias. Os voluntários gotejaram solução de sacarose 20% (8x/dia) e a solução de tratamento (água, extrato ou um enxaguatório comercial; 2x/dia). O biofilme dentário foi analisado quanto à acidogenicidade, quantidade microorganismos e presença de polissacarídeos álcali-solúveis. Nos blocos de esmalte, foram realizadas as análises de microdureza superficial e em secção longitudinal. O extrato foi capaz de afetar a viabilidade, a produção de ácidos e a síntese protéica do biofilme formado in vitro. No biofilme formado in situ, o extrato foi capaz de diminuir a queda do pH, o acúmulo de microorganismos, a formação de polissacarídeos extracelulares e a desmineralização do esmalte. Conclui-se que o extrato foi capaz de diminuir a expressão de proteínas envolvidas no metabolismo bacteriano, a patogenicidade do biofilme bucal e a desmineralização do esmalte in situ. / Natural products have been studied with relation to chemical control of pathogenical microorganisms of dental biofilm. The aim of this study was to clarify the effect of Psidium cattleianum leaf extract on S. mutans metabolism, on in situ biofilms and on enamel demineralization. The extract was obtained by decoction in deionized water. The extract was studied in vitro with relation to viability, protein expression and acid production of S. mutans biofilms. On the in situ study, enamel bovine blocks were placed in palatal appliances of ten volunteers. The experimental phase consisted of three stages with a duration of 14 days each and a washout period of seven days. The volunteers dripped 20% sucrose (8x/day) and the treatment solution (water, extract or a marketed mouthwash – 2x/day) on the enamel blocks. The dental biofilm was analyzed regarding the amount of microorganisms and presence of alkalisoluble polysaccharides. On the enamel blocks, surface and cross-sectional microhardnessess were evaluated. The extract was able to affect the viability, acid production and protein synthesis of the in vitro biofilm. On the in situ biofilm, the extract was able to decrease pH drop, microorganism accumulation, extracellular polysaccharides formation and enamel demineralization. It can be concluded that the extract was able to reduce the expression of proteins involved on bacterial metabolism, the pathogenicity of dental biofilm and in situ enamel demineralization.
7

Influência do extrato de araçá (Psidium cattleianum) e aroeira do sertão (Myracrodruon urundeuva) na prevenção à cárie em modelos animais

Menezes, Taís Elisabete Crivellaro de [UNESP] 19 December 2006 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:27:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-12-19Bitstream added on 2014-06-13T20:17:13Z : No. of bitstreams: 1 menezes_tec_me_araca.pdf: 558527 bytes, checksum: fb65e2e98ca3d3c121131d0247fba076 (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O presente estudo teve como objetivos avaliar a capacidade dos extratos de araçá e de aroeira do sertão em interferir com a microdureza do esmalte dental de ratos submetidos a desafio cariogênico, bem como avaliar o efeito desses extratos sobre a microbiota cariogênica implantada desses animais, e seus possíveis efeitos colaterais. Sessenta ratos do tipo Wistar, divididos em 4 grupos, foram submetidos a desafio cariogênico (dieta NIH-2000) e, metade deles, à cirurgia para remoção das glândulas salivares maiores. Os grupos recebiam, como solução de hidratação, água (controle), extrato de araçá (diluído em água) ou extrato de aroeira (diluída em água). Coletas da microbiota bucal dos animais foram realizadas semanalmente e, após 53 dias, os animais foram sacrificados. Os dentes dos animas foram preparados e submetidos à análise de microdureza longitudinal do esmalte, assim como os órgãos vitais de alguns animais foram removidos e submetidos à análise histopatolágica. O modelo animal e as condições experimentais se mostraram adequadas para a caracterização dos efeitos dos extratos testados sobre a microdureza do esmalte e sobre a microbiota cariogênica, sendo que os dois extratos testados produziram uma redução substancial da microbiota cariogênica nos animais experimentais e o consumo dos mesmos afetou positivamente a dureza superficial do esmalte. A ingestão dos extratos não alterou significativamente os órgãos dos animais, quando comparado com os grupos controle. / The aim of this study was to evaluate the influence of araçá and aroeira extracts on dental enamel microhardness of rats submitted to a cariogenic challenge, and on their cariogenic microflora and determine the collateral effects of the extracts in the animals. Sixty Wistar rats, divided in 4 groups, were submitted to a cariogenic diet (NIH-2000 diet) and, half of them, was submitted to surgical remotion of the major salivary glands. The groups received water (control), araçá extract (solved in water) or aroeira extract (solved in water) as hydration solution. Collections of oral specimens were performed weekly and, after 53 days, the animals were sacrified. The animals teeth were prepared and submitted to longitudinal enamel microhardness analysis, as well some vital organs of animals were removed and submitted to histopathological procedures and analysis. The animal pattern and experimental conditions were appropriated to evaluate and measure the extracts effects on the enamel microhardness and on the cariogenic microbiota. Both the extracts reduced substantially the cariogenic microbiota of the animals and the use of them affected positively the longitudinal enamel microhardness. The extracts ingestion did not affected in a significant extension the microscopic characteristics of the organs, compared with control group (water).

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