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Comparação do efeito de transporte do forâmen apical entre dois sistemas de instrumentação : estudo piloto
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Advisor(s)
Abstract(s)
Objetivos: Comparar o efeito de transporte do forâmen apical entre dois sistemas de
limas: limas Go-Taper Universal® e Reverso Silver®, sendo que o primeiro tem um
movimento rotatório e o segundo um movimento reciprocante.
Materiais e métodos: Neste projeto foi utilizada uma amostra de 18 (dezoito) dentes
humanos monorradiculares nos quais foi instrumentada a raiz. A fim de se uniformizar a
amostra e para que todos os dentes fossem padronizados, estes foram seccionados após medição de 15 mm de raiz. Os monorradiculares utilizados satisfizeram os seguintes critérios: ausência de fraturas; ausência de sinais de reabsorção externa/interna; ausência de calcificação da polpa; e apéx completamente formado. Realização de fotomicrografias com MEV (microscópio eletrónico de varrimento) antes e depois da instrumentação, para avaliação da diferença da área do forâmen apical. As hipóteses foram: H0 - não há diferenças entre os dois sistemas; e H1 - há diferenças entre os dois sistemas. Todo o processo foi realizado pela mesma pessoa. Diferenças significativas entre os grupos foram avaliadas usando o teste Mann-Whitney. Considera-se P < 0.05 como valor de significância.
Resultados: Não se verificaram diferenças significativas (P > 0.05) na avaliação de
transporte do forâmen apical, entre os dois sistemas de instrumentação, quer no movimento reciprocante quer no movimento de rotação contínua.
Conclusões: Neste estudo concluiu-se que não existem diferenças no efeito de transporte do forâmen apical entre os dois sistemas de limas. O uso de dentes humanos contém variáveis relevantes não controláveis pelo utilizador.
Objectives: Compare the canal transportation between two file systems: Go-Taper Universal® and Reverso Silver® files, the former having a rotational movement and the latter having a reciprocating movement. Materials and Methods: In this project was used a sample of 18 (eighteen) single-rooted human teeth in which the root was instrumented. To standardize the sample and for all teeth, they were sectioned after measuring 15 mm of root. The single root used met the following criteria: absence of fractures, absence of signs of external/internal resorption, absence of pulp calcification, and having fully formed apex. Photomicrographs with SEM (scanning electron microscope) before and after instrumentation. The hypotheses were: H0 - there are no differences between the two systems; and H1 - there are differences between the two systems. The whole process was performed by the same person. Significant differences between groups were assessed using the Mann-Whitney test. P < 0.05 was considered as significance value. Results: There were no significant differences (P > 0.05) in canal transportation evaluation between the two instrumentation systems, either in reciprocating or continuous rotation movement. Conclusions: In the current study, it was not possible to conclude about canal transportation between the two file systems. The use of human teeth contains relevant non-user controllable variables.
Objectives: Compare the canal transportation between two file systems: Go-Taper Universal® and Reverso Silver® files, the former having a rotational movement and the latter having a reciprocating movement. Materials and Methods: In this project was used a sample of 18 (eighteen) single-rooted human teeth in which the root was instrumented. To standardize the sample and for all teeth, they were sectioned after measuring 15 mm of root. The single root used met the following criteria: absence of fractures, absence of signs of external/internal resorption, absence of pulp calcification, and having fully formed apex. Photomicrographs with SEM (scanning electron microscope) before and after instrumentation. The hypotheses were: H0 - there are no differences between the two systems; and H1 - there are differences between the two systems. The whole process was performed by the same person. Significant differences between groups were assessed using the Mann-Whitney test. P < 0.05 was considered as significance value. Results: There were no significant differences (P > 0.05) in canal transportation evaluation between the two instrumentation systems, either in reciprocating or continuous rotation movement. Conclusions: In the current study, it was not possible to conclude about canal transportation between the two file systems. The use of human teeth contains relevant non-user controllable variables.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Ápex dentário Alargamento foraminal Preparação canalar