192 resultados para Estabilidade primária

em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"


Relevância:

100.00% 100.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

100.00% 100.00%

Publicador:

Resumo:

When implants are installed immediately after tooth extraction may occur anchoring primary decreased, delay or failure of osseointegration process. This occurs because of the large interface between the surrounding walls of the socket and the surface of the implant. For reconstruction, replacement or filling of bone defects the solution can be obtained with the use of autogenous, heterogenous or allogeneic bone grafts. However, these grafts suffer certain drawbacks, particularly a high rate of donor site morbidity, limited amounts of available bone, and the additional operative time required for harvest. For these reasons, intensive efforts have been directed toward developing alternative substances for to either augment or substitute. In this paper, we will examine some of the commonly used materials : fibrin and calcium phosphate.

Relevância:

70.00% 70.00%

Publicador:

Resumo:

The mini-implant has become a device for anchorage quite widespread and current employee in Orthodontics. The effectiveness of mini-implant is mostly due for its stability primary, however is important to understand about factors that influence the stability. This article presents a review of literature in the database, and as a criterion for inclusion in articles published on the factors related to the stability of mini-implant carried out on humans and animals. The articles was selected according selection criteria related to stability, The factors of mini-implants stability have been described in the literature with scattered scientific information, most of them just as clinical observations. However, these factors of stability can be classified in relation to screw, professional and patient.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

60.00% 60.00%

Publicador:

Resumo:

The design of implant structure is still a questioning to the professionals, while their variations can to influence of stress distribution favorably to bone. Therefore, the aim of study was to review addressing the topic of osseointegrated implants design establishing answers for the patient oral rehabilitation, according variations existing on the market. It was conducted a detailed search strategy by the PubMed/ Medline and Bireme, it was used as descriptors: “dental implants cylinder”; “dental implants thread”; “dental implants geometry”, until May 2014. From 798 articles, after review were selected 18 articles and 1 specific area book. The results were divided to compare design of implant and threads for further discussion and conclusions. Thus, conclude that the threads implants are best used because of its advantages with respect to the stress distribution and stability primary. The variations of the differents types of threads, have influence for stress distribution.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

With the advances of osseointegration principles, the use of implant-supported prosthesis has become a routine treatment option. The success of an implant is initially associated to the surgical technique, primary stability and absence of bacterial contamination on the implant site. Subsequently, the absence of mechanical trauma (overload) and peri-implantitis are sine qua non conditions to the longitudinal success of implant treatment. Therefore, the strict maintenance of oral hygiene is highly important to avoid biofilm accumulation around the implant and consequently to provide last-long implant-supported dentures. The clinician has the responsibility to supply a favorable prognosis to the patient so that the rehabilitation succeed. For this reason, during prosthesis fabrication the clinician should observe the design and emergency profile of the prosthesis, the peri-implant sulcus depth as well as the presence of motor or psychological impairment by the patient. Subjects with missing teeth and that will be submitted to the implant treatment should be motivated and adequate instructed regarding oral hygiene and its importance since the best option to obtain treatment longevity and consequently patient’s satisfaction is the prevention. Therefore, this study aimed to perform a literature review about the hygiene of implant-supported prosthesis.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Rehabilitation of edentulous patients has been a challenge for professionals since the primary concepts and fundaments of occlusal rehabilitation. However, this philosophy has been improved by implant-supported fixed dentures that represent a predictable clinical modality on modern dentistry. Nevertheless, considering that the traditional protocol requires a long period for bone healing and definitive rehabilitation, immediate loading of implants has been advantageous for functional and esthetic rehabilitation of patients in a reduced period. The aim of this study is to discuss the biomechanical and functional fundaments of occlusion for implant-supported fixed dentures with mediate and immediate loading to provide clinical evidences for longevity of this treat ment modality based on the current literature. According to this, some prerequisites as proper bone quality, excellent primary stability, sufficient number of implants, rigid splinting, and control and mastering of biomechanical fundamentals of static and dynamic occlusion are mandatory for treatment predictability and longevity.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

A remodelação óssea é um processo contínuo, que possibilita a substituição de osso envelhecido e danificado por tecido novo. A reparação ao redor de implantes osseointegráveis e enxertos ósseos em situações desfavoráveis depende do estabelecimento de um adequado contato entre tecido ósseo e implante por meio da estabilidade primária. Tendo em vista a importância da estabilidade primária do implante na biomecânica e conseqüente osseointegração, a associação de biomateriais reabsorvíveis ao sítio de instalação dos implantes se torna relevante. Destes biomateriais, destaca-se o copolímero de ácido polilático/ poliglicólico (PLA/PGA), que poderia contribuir com a estabilidade temporária dos implantes.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

O objetivo deste trabalho foi estudar o desempenho produtivo, adaptabilidade e estabilidade fenotípica de seis genótipos de tomateiro na região de Marília, SP. Os experimentos foram conduzidos em nove ambientes (seis sob condições de cultivo protegido e três sob condições de céu aberto), com seis genótipos (Carmen, Diva, Donador, Graziela, Vita e HE-295), em blocos casualizados, com quatro repetições. Ocorreram diferenças significativas entre ambientes, e a média geral dos cultivos protegidos superou a dos cultivos a céu aberto quanto à produtividade, apesar de a média geral dos cultivos a céu aberto ser superior quanto ao peso médio de frutos. As cultivares, à exceção de HE-295, demonstraram alta estabilidade, merecendo destaque as cultivares Carmen, Donador e Vita, que tiveram rendimento médio superior ao da média geral, adaptabilidade geral e comportamento previsível em todos os ambientes estudados. Quanto ao peso médio dos frutos, as cultivares Diva e Vita foram as únicas que mostraram ampla adaptabilidade a todos os ambientes, comportamento previsível, além de apresentarem peso médio do fruto superior ao da média geral.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

A reação de fixação de complemento é um dos testes usados no diagnóstico confirmatório da brucelose bovina, e para sua realização emprega-se o mesmo antígeno usado na prova de soroaglutinação lenta, porém não foi possível encontrar na literatura estudos sobre a estabilidade desse antígeno para uso na prova de fixação de complemento, de modo a estabelecer um prazo de validade para o mesmo. Por isso, esta investigação teve por objetivo avaliar a estabilidade do antígeno de célula total de Brucella conservado sob refrigeração, para uso na reação de fixação de complemento. Analisaram-se 14 partidas de antígeno, preparado com Brucella abortus amostra 1119/3 e padronizado para uso na prova de soroaglutinação lenta, com tempo de fabricação variando de 9 meses a 23 anos e 11 meses. Testaram-se 167 soros bovinos com títulos variáveis de anticorpos contra Brucella, adotando-se a técnica com incubação a 37ºC nas duas fases da reação e 5 unidades hemolíticas 50% de complemento. Considerou-se como positivo o soro com pelo menos 25% de fixação de complemento na diluição 1:4. Compararam-se os resultados obtidos com as 13 partidas de antígeno com aqueles obtidos com a partida com 9 meses de fabricação, usando o teste de chi2 de McNemar e o coeficiente kappa. A grande maioria dos soros apresentou resultados muito próximos quando testados com as diversas partidas de antígeno, e não se observou relação entre tempo de fabricação do antígeno e diferenças nos resultados obtidos.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

In a program of seed quality assurance, the evaluation of seed vigor is fundamental and necessary to the global production process outcome. The objective of this study was to evaluate the efficiency of the precocity of primary root emission test, for the substrates paper roll, on paper and between papers, on vigor of pearl millet seeds. Ten seed lots evaluated in four replication of 100 pearl millet seeds cultivar ADR 500 were sown in three different humidified substrates: between papers, paper roll and on paper. These were incubated at a temperature of 20-30 degrees C. Fifteen hours after the germination test was established, the emission of seed primary roots started to be observed every 2 hours up to 25 hours and then after 48 hours. For the comparison among lots, seeds were also evaluated by moisture content, weight of 1000 seeds, germination and vigor (first count, electrical conductivity, accelerated aging and seedling emergence). The statistical design was completely randomized, and the means comparisons were accomplished by the Tukey test at 0.05 level of probability. It was concluded that the precocity of primary root emission test on paper is promising for vigor evaluation of pearl millet seeds.