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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

Treatment of osseous defects with physically assisted cell migration and Guidor® resorbable membranes

Nouneh, Imad Elias. January 1995 (has links)
Thesis (M.S.)--University of Louisville, 1995. / School of Dentistry, Department of Biological and Biophysical Sciences. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
2

Treatment of osseous defects with physically assisted cell migration and Guidor® resorbable membranes

Nouneh, Imad Elias. January 1995 (has links)
Thesis (M.S.)--University of Louisville, 1995. / School of Dentistry, Department of Biological and Biophysical Sciences. Includes bibliographical references.
3

Effect of enamel matrix derivatives (EMD) on collagen GTR-based root coverage procedure a thesis submitted in partial fulfillment ... for the degree of Master of Science in Periodontics ... /

Trabulsi, Manal. January 2003 (has links)
Thesis (M.S.)--University of Michigan, 2003. / Includes bibliographical references.
4

The structure and properties of soluble phosphate based glasses

Franks, Katrin January 2000 (has links)
No description available.
5

A protocol to study tissue regeneration in alveolar bony defects /

Hattingh, André Christiaan. January 1999 (has links)
Thesis (M.Ch.D.(Periodontology and Oral Medicine))--University of Pretoria, 1999. / Includes abstract in English and Afrikaans. Includes bibliographical references. Also available online.
6

Estudo da ação da dexametasona na regeneração da nadadeira caudal do peixe teleósteo Cyprinus carpio (carpa)

Ochandio, Beatriz Silva [UNESP] 03 August 2010 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:22:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-08-03Bitstream added on 2014-06-13T19:49:28Z : No. of bitstreams: 1 ochandio_bs_me_rcla.pdf: 1920711 bytes, checksum: 80d927f31e28ee2a2da9e4e04b3bc1f1 (MD5) / As nadadeiras dos peixes teleósteos apresentam uma capacidade de regeneração bastante rápida, o que as torna um modelo biológico importante e adequado para o estudo in vivo. Estudos mostram que corticóides usados por longos períodos podem atrasar o processo de cicatrização, influenciando na reepitelização, na neovascularização e na síntese do colágeno. Os constituintes das nadadeiras dos peixes teleósteos contêm grande quantidade de colágeno e assim o objetivo do presente trabalho foi estudar o efeito da dexametasona (um antiinflamatório e glicocorticóide esteróide bastante utilizado no tratamento de doenças reumáticas) durante o processo regenerativo das nadadeiras caudais das carpas (Cyprinus carpio). Para isso, foram montados dois aquários de vidro, um para o grupo controle e outro para o grupo tratado com a dexametasona (Henrifarma) na concentração de 20mg/L. Os peixes distribuídos nesses aquários tiveram suas nadadeiras caudais amputadas transversalmente e permaneceram nos respectivos aquários para que ocorresse a regeneração. Foram feitas coletas das nadadeiras em regeneração em intervalos de um, dois, quatro, seis, oito e 10 dias após a amputação. As amostras foram processadas histologicamente para permitir os estudos ao microscópio de luz e a análise estatística. Observou-se que nos peixes do grupo controle, as nadadeiras regeneraram normalmente e cresceram o esperado em cada intervalo de tempo. Nos peixes do grupo tratado com dexametasona, no entanto, a regeneração das nadadeiras caudais foi mais lenta. Verificou-se que, em cada intervalo analisado, as nadadeiras regeneradas dos peixes expostos à droga eram menores que a medida das nadadeiras dos peixes do grupo controle, provavelmente porque a dexametasona tenha influenciado a expressão dos genes necessários para o processo de regeneração. Os resultados obtidos nessa pesquisa mostraram que... / The fins of teleost fish have a capacity for rapid regeneration, which makes them a suitable biological model for in vivo investigation. Studies have shown that, when used over long periods, corticoids may slow down the healing process, thereby influencing re-epithelialization, neovascularization and collagen synthesis. As the fins of teleost fish contain a large amount of collagen, the aim of the present study was to investigate the effect of dexamethasone (an anti-inflammatory steroid glycocorticoid often used in the treatment of rheumatic diseases) during the regeneration process of the caudal fin of the carp (Cyprinus carpio). Two glass aquaria were used for each regeneration interval - one for the control group and another for the group treated with dexamethasone (Henrifarma) at a concentration of 20 mg/L. The caudal fins were amputated transversely and the fish remained in their respective aquaria until regeneration had occurred. Collections of regenerating fin tissue were performed at one, two, four, six, eight and ten days following amputation. The samples were processed for light microscopy and statistical analysis. The fins in the control group regenerated normally and grew at the expected rate in each time interval. The fins in the group treated with dexamethasone regenerated at a slower rate at each time interval. It is possible that dexamethasone affected the expression of the genes needed for the regeneration process. The results of the present study demonstrate delayed regeneration with dexamethasone at the concentration used, but not total inhibition of the process. Thus, the caudal fin proved to be a good model for the histological investigation of tissue regeneration and the toxic effect of this drug on this process. In order to gain a better understanding of the alterations in all phases of the regeneration process, histological analysis should be combined with... (Complete abstract click electronic access below)
7

Estudo da ação da dexametasona na regeneração da nadadeira caudal do peixe teleósteo Cyprinus carpio (carpa) /

Ochandio, Beatriz Silva. January 2010 (has links)
Resumo: As nadadeiras dos peixes teleósteos apresentam uma capacidade de regeneração bastante rápida, o que as torna um modelo biológico importante e adequado para o estudo in vivo. Estudos mostram que corticóides usados por longos períodos podem atrasar o processo de cicatrização, influenciando na reepitelização, na neovascularização e na síntese do colágeno. Os constituintes das nadadeiras dos peixes teleósteos contêm grande quantidade de colágeno e assim o objetivo do presente trabalho foi estudar o efeito da dexametasona (um antiinflamatório e glicocorticóide esteróide bastante utilizado no tratamento de doenças reumáticas) durante o processo regenerativo das nadadeiras caudais das carpas (Cyprinus carpio). Para isso, foram montados dois aquários de vidro, um para o grupo controle e outro para o grupo tratado com a dexametasona (Henrifarma) na concentração de 20mg/L. Os peixes distribuídos nesses aquários tiveram suas nadadeiras caudais amputadas transversalmente e permaneceram nos respectivos aquários para que ocorresse a regeneração. Foram feitas coletas das nadadeiras em regeneração em intervalos de um, dois, quatro, seis, oito e 10 dias após a amputação. As amostras foram processadas histologicamente para permitir os estudos ao microscópio de luz e a análise estatística. Observou-se que nos peixes do grupo controle, as nadadeiras regeneraram normalmente e cresceram o esperado em cada intervalo de tempo. Nos peixes do grupo tratado com dexametasona, no entanto, a regeneração das nadadeiras caudais foi mais lenta. Verificou-se que, em cada intervalo analisado, as nadadeiras regeneradas dos peixes expostos à droga eram menores que a medida das nadadeiras dos peixes do grupo controle, provavelmente porque a dexametasona tenha influenciado a expressão dos genes necessários para o processo de regeneração. Os resultados obtidos nessa pesquisa mostraram que... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The fins of teleost fish have a capacity for rapid regeneration, which makes them a suitable biological model for in vivo investigation. Studies have shown that, when used over long periods, corticoids may slow down the healing process, thereby influencing re-epithelialization, neovascularization and collagen synthesis. As the fins of teleost fish contain a large amount of collagen, the aim of the present study was to investigate the effect of dexamethasone (an anti-inflammatory steroid glycocorticoid often used in the treatment of rheumatic diseases) during the regeneration process of the caudal fin of the carp (Cyprinus carpio). Two glass aquaria were used for each regeneration interval - one for the control group and another for the group treated with dexamethasone (Henrifarma) at a concentration of 20 mg/L. The caudal fins were amputated transversely and the fish remained in their respective aquaria until regeneration had occurred. Collections of regenerating fin tissue were performed at one, two, four, six, eight and ten days following amputation. The samples were processed for light microscopy and statistical analysis. The fins in the control group regenerated normally and grew at the expected rate in each time interval. The fins in the group treated with dexamethasone regenerated at a slower rate at each time interval. It is possible that dexamethasone affected the expression of the genes needed for the regeneration process. The results of the present study demonstrate delayed regeneration with dexamethasone at the concentration used, but not total inhibition of the process. Thus, the caudal fin proved to be a good model for the histological investigation of tissue regeneration and the toxic effect of this drug on this process. In order to gain a better understanding of the alterations in all phases of the regeneration process, histological analysis should be combined with... (Complete abstract click electronic access below) / Orientador: Patrícia Pasquali Parise Maltempi / Coorientador: Ivanira José Bechara / Banca: Rosicleire Verissimo Silveira / Banca: Lucia Elvira Alvares / Mestre
8

AvaliaÃÃo da biocompatibilidade e bioatividade de membranas colÃgeno polianiÃnico mineralizadas e reticuladas em modelos animais. / Evaluation of biocompatibility and bioactivity of collagen polyanionic membranes mineralized and crosslinked in animal models.

Denusa Moreira VerÃssimo 09 March 2012 (has links)
nÃo hà / O objetivo desse estudo foi avaliar membranas de colÃgeno polianiÃnico (CPA) reticuladas e impregnadas com hidroxiapatita, manufaturadas pelo Departamento de FÃsica da Universidade Federal do CearÃ. Dividiu-se o trabalho em 2 etapas, onde inicialmente avaliou-se a biocompatibilidade e a biodegradaÃÃo de 6 diferentes membranas de CPA, divididas nos seguintes grupos: trÃs com 0, 25 e 75 ciclos de impregnaÃÃo com hidroxiapatita (CPA, CPA 25, CPA 75) e mais trÃs cujas membranas foram reticuladas com glutaraldeÃdo (GA) (CPA GA, CPA 25GA, CPA 75GA) inseridas em tecido subcutÃneo de ratos. AnÃlises histopatolÃgicas do infiltrado inflamatÃrio, atividade de mieloperoxidase (MPO), dosagem de citocinas, espessura de cÃpsula fibrosa, imunohistoquÃmica para metaloproteinase e biodegradaÃÃo das membranas foram avaliadas apÃs 1, 7, 15, 30, 60 e 120 dias. Posteriormente, avaliou-se o efeito das 3 melhores membranas na regeneraÃÃo Ãssea guiada usando defeito Ãsseo crÃtico em calvÃria de ratos (DOC), onde as membranas foram posicionadas sobre o defeito. FormaÃÃo Ãssea foi avaliada com base na radiografia digital (RD), tomografia computadorizada (TC) e anÃlise histolÃgica, 24 horas, 4, 8 e 12 semanas apÃs o procedimento cirÃrgico. MPO e dosagem de citocinas foram realizadas apÃs 24 horas. No subcutÃneo, as membranas reticuladas com GA mostraram espessa cÃpsula fibrosa e menor reaÃÃo inflamatÃria permanecendo intactas apÃs 120 dias. No modelo de regeneraÃÃo Ãssea em calvÃria de ratos, apÃs 12 semanas, os grupos CPA GA e CPA 25GA apresentaram reduÃÃo significativa da Ãrea radiolÃcida quando comparadas ao grupo basal. A anÃlise histolÃgica mostrou que nos grupos CPA GA e CPA 25GA as membranas ainda estavam intactas, envolvidas por uma espessa cÃpsula fibrosa e as membranas do grupo CPA 75GA apresentaram inÃcio de reabsorÃÃo. NÃo foi encontrada diferenÃa estatÃstica entre os grupos quanto a atividade MPO e citocina IL-1β. ConcluÃmos que as membranas reticuladas mostraram-se mais biocompatÃveis e se mantiveram livre de biodegradaÃÃo no perÃodo de observaÃÃo. Essas membranas induziram o fechamento dos defeitos Ãsseos e nÃo induziram reaÃÃo inflamatÃria. A impregnaÃÃo de hidroxiapatita nÃo acelerou a cicatrizaÃÃo do defeito cirÃrgico. Nossos resultados sugerem que as membranas de CPA reticuladas poderÃo ser Ãteis nos processos em que a formaÃÃo de um novo osso depende de uma duraÃÃo mais prolongada da barreira mecÃnica. / The aim of this study was to evaluate polyanionic collagen (PAC) membranes reticulated and impregnated with hydroxyapatite, manufactured by the Physics Department, Federal University of CearÃ. This study was divided into two stages, initially it was evaluated the biocompatibility and biodegradation of six different membranes of PAC, divided into the following groups: three with 0, 25 and 75 cycles of impregnation with apatite (PAC, PAC 25, PAC 75 ) and three more whose membranes were crosslinked with glutaraldehyde (GA) (GA PAC, PAC 25GA, PAC 75GA) inserted into the subcutaneous tissue of rats. Histopathological analyzes of inflammatory infiltration, myeloperoxidase activity (MPO), cytokine, thickness of fibrous capsule, immunohistochemistry for metalloproteinase and degradation of the membranes were evaluated after 1, 7, 15, 30, 60 and 120 days. Subsequently, it was evaluated the effect of the three best membranes in guided bone regeneration using bone critical defects in rat calvaria (DOC), where the membranes were placed over the defect. Bone formation was evaluated based on digital radiography (DR), computed tomography (CT) and histological analysis, 24 hours, 4, 8 and 12 weeks after surgery. MPO and cytokine were performed after 24 hours. In the subcutaneous tissue, the membranes crosslinked with GA showed thick fibrous capsule, less inflammatory reaction and remained intact after 120 days. In the bone regeneration model in rat calvaria, after 12 weeks, PAC GA and PAC 25GA groups showed significant reduction in radiolucent area compared to the baseline group. Histological analysis showed that in PAC GA and PAC 25GA groups, membranes were still intact, surrounded by a thick fibrous capsule and in PAC 75GA group, membranes showed early resorption. There was no statistical difference between groups in MPO activity and IL-1β. We conclude that the crosslinked membranes were more biocompatible and remained free from degradation during the observation period. These membranes induced closure of bone defects and did not induce inflammatory reaction. The impregnation of hydroxyapatite did not accelerate the healing of surgical defect. Our results suggest that the crosslinked membranes CPA may be useful in cases where new bone formation is dependent on a longer duration of mechanical barrier.
9

A protocol to study tissue regeneration in alveolar bony defects

Hattingh, Andre Christiaan 05 January 2007 (has links)
Please read the abstract in the front section of this document / Dissertation (MChD (Periodontics and Oral Medicine))--University of Pretoria, 2007. / Oral Pathology and Oral Biology / unrestricted
10

Advanced Dental Biomaterials: Chemistry, Manipulation and Applications

Khurshid, Z., Najeeb, S., Zafar, M.S., Sefat, Farshid 25 February 2021 (has links)
No / Advanced Dental Biomaterials is an invaluable reference for researchers and clinicians within the biomedical industry and academia. The book can be used by both an experienced researcher/clinician learning about other biomaterials or applications that may be applicable to their current research or as a guide for a new entrant into the field who needs to gain an understanding of the primary challenges, opportunities, most relevant biomaterials, and key applications in dentistry.

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