Estudo comparativo de duas técnicas de moldagem para prótese sobre implante tipo protocolo
Elaine Cristina Tognoli da Veiga.
Dissertação
Português
D762
2013.
73 f. : il.
Dissertação (Mestrado em Implantodontia) - Centro de Pesquisas Odontológicas São Leopoldo Mandic, Campinas - SP.
Nesse estudo avaliou-se a precisão de duas técnicas diretas de moldagem sobre implantes para prótese tipo protocolo. Foram avaliados e comparados os seguintes aspectos de ambas as técnicas: tempo de procedimento e presença de gap entre os mini pilares dos implantes e a supraestrutura. Dois grupos...
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Nesse estudo avaliou-se a precisão de duas técnicas diretas de moldagem sobre implantes para prótese tipo protocolo. Foram avaliados e comparados os seguintes aspectos de ambas as técnicas: tempo de procedimento e presença de gap entre os mini pilares dos implantes e a supraestrutura. Dois grupos foram formados: grupo 1, técnica preconizada por Branemark et al. (1985), transferentes quadrados unidos com fio dental e resina acrílica, com moldeira aberta e grupo 2, transferentes quadrados, moldeira plástica com sistema de tela fraturável e resina acrílica distribuída em cima da moldeira unindo os transferentes e estabelecendo uma união rígida entre eles (Migliorança, 2008). Foram realizados quinze corpos de prova para cada grupo (n=15). Todas as moldagens foram realizadas com silicone de condensação. Foi confeccionado um modelo mestre, em resina acrílica, com quatro implantes de hexágono externo, paralelos entre si. Sobre os implantes foram instalados os intermediários (mini pilares cônicos) e confeccionada uma estrutura metálica mestre com adaptação passiva. Os análogos dos implantes nos modelos foram enumerados de 1 a 4, começando pelo mais distal da direita para a esquerda. Foram realizadas três sequências de avaliação. Na primeira sequência os 4 parafusos foram colocados na estrutura metálica. Na segunda sequência foi colocado um parafuso no análogo 1 e na terceira sequência foi colocado um parafuso no análogo 4. Em todas as sequências, as adaptações entre os mini pilares e a estrutura metálica, foram mensuradas tanto pela vestibular como pela lingual, do análogo 1 ao 4, por meio de inspeção visual, sondagem da linha de união com explorador e Análise Computadorizada das Fotografias Digitais (ACFD). Os tempos clínicos mensurados para execução dos procedimentos de moldagem foram submetidos ao teste t de Student e demonstrou que houve diferença significativa entre os tempos despendidos para execução das técnicas de moldagem, indicando que o tempo foi menor para o Grupo 2 (p<0,001). Testes exatos de Fisher foram aplicados para verificar se existiu diferença entre ambas as técnicas quanto à proporção de implantes que apresentaram gap em cada uma das três sequências de avaliação do posicionamento da supraestrutura sobre o modelo e indicaram que não diferiram significativamente entre si (p = 1,000). Pode-se concluir que o tempo de moldagem com a técnica de moldeira com tela fraturável foi menor que na técnica descrita por Branemark et al. (1985) e que em relação à presença de gap, os resultados apresentaram-se semelhantes.
Palavras-chave: Prótese sobre implante. Moldagem de transferência. Precisão. Técnica de moldagem.
In this study we evaluated the accuracy of two impression techniques for implant prosthesis protocol type. The following aspects of both techniques were evaluated and compared: procedure time and presence of gap between the mini implant's pillars and the superstructure. Two groups were formed: group 1, technique recommended by Branemark et al. (1985), squared transfer together with dental floss and acrylic resin, with open tray and group 2, squared transfer, plastic tray with screen system fractured and acrylic resin distributed on the tray joining the transferees and establishing a rigid connection between them (Migliorança, 2008). Fifteen specimens for each group were performed (n=15). All casts were made with condensation silicone. A master model was made in acrylic resin, with four external hex implants, parallel to each other. About the implants were installed intermediaries (Mini pillars conical) and made a metal superstructure master with passive adaptation. The implant's analogs in the models were numbered from 1 to 4, starting with the most distal from right to left. Three sequences of evaluation were performed. In the first sequence the 4 screws were placed in the metal structure. In the second sequence was placed a screw in the analog 1 and in the third sequence was placed one screw in the analog 4. In all sequences, the adaptations among mini pillars and metal structure were measured by both, the vestibular and the lingual, from analog 1 to 4, by visual inspection, probing the line of union with explorer and Computerized Analysis of Digital Photography (ACFD). The measured clinical times for execution of molding procedures were submitted to "Student's t test" and showed that there was significant difference between the time spent for execution of molding techniques, indicating that the time was shorter in Group 2 (p <0.001). "Fisher's exact tests" were applied to check whether there was difference between both techniques as the proportion of implants that had a gap in each of the three sequences assessing the positioning of the superstructure upon the model and indicate that not differ significantly between them (p = 1.000). It can be concluded that the time of the molding with the technique of tray with fractured screen was lower than the technique described by Branemark et al. (1985) and in the presence of a gap, the results were similar.
Keywords: Implant prosthesis. Transfer Impression. Accuracy. Impression technique. Ver menos
Palavras-chave: Prótese sobre implante. Moldagem de transferência. Precisão. Técnica de moldagem.
In this study we evaluated the accuracy of two impression techniques for implant prosthesis protocol type. The following aspects of both techniques were evaluated and compared: procedure time and presence of gap between the mini implant's pillars and the superstructure. Two groups were formed: group 1, technique recommended by Branemark et al. (1985), squared transfer together with dental floss and acrylic resin, with open tray and group 2, squared transfer, plastic tray with screen system fractured and acrylic resin distributed on the tray joining the transferees and establishing a rigid connection between them (Migliorança, 2008). Fifteen specimens for each group were performed (n=15). All casts were made with condensation silicone. A master model was made in acrylic resin, with four external hex implants, parallel to each other. About the implants were installed intermediaries (Mini pillars conical) and made a metal superstructure master with passive adaptation. The implant's analogs in the models were numbered from 1 to 4, starting with the most distal from right to left. Three sequences of evaluation were performed. In the first sequence the 4 screws were placed in the metal structure. In the second sequence was placed a screw in the analog 1 and in the third sequence was placed one screw in the analog 4. In all sequences, the adaptations among mini pillars and metal structure were measured by both, the vestibular and the lingual, from analog 1 to 4, by visual inspection, probing the line of union with explorer and Computerized Analysis of Digital Photography (ACFD). The measured clinical times for execution of molding procedures were submitted to "Student's t test" and showed that there was significant difference between the time spent for execution of molding techniques, indicating that the time was shorter in Group 2 (p <0.001). "Fisher's exact tests" were applied to check whether there was difference between both techniques as the proportion of implants that had a gap in each of the three sequences assessing the positioning of the superstructure upon the model and indicate that not differ significantly between them (p = 1.000). It can be concluded that the time of the molding with the technique of tray with fractured screen was lower than the technique described by Branemark et al. (1985) and in the presence of a gap, the results were similar.
Keywords: Implant prosthesis. Transfer Impression. Accuracy. Impression technique. Ver menos
Estudo comparativo de duas técnicas de moldagem para prótese sobre implante tipo protocolo
Elaine Cristina Tognoli da Veiga.
Estudo comparativo de duas técnicas de moldagem para prótese sobre implante tipo protocolo
Elaine Cristina Tognoli da Veiga.
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