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Authors
Abstract(s)
Introdução: Os torquímetros, ou chaves de torque, são indispensáveis na
reabilitação oral protética com implantes dentários. Existem vários tipos de
torquímetros manuais, dos quais se destacam os toggle-style e os spring-style.
O principal objetivo desta investigação foi analisar e avaliar o comportamento
mecânico de dois torquímetros diferentes em prótese sobre implantes.
Materiais e Métodos: Para a realização deste estudo, foram utilizados dois
torquímetros com sistemas dinamométricos diferentes, spring-style e togglestyle. O estudo para cada torquímetro foi efetuado em 3 mesas de trabalho,
montadas cada uma com análogo, pilar standard reto e parafuso reto. Para cada
torquímetro foram feitos 30 ciclos de aperto/desaperto para os valores préselecionados, 10, 20 N.cm e 35 N.cm., e anotado o valor medido por uma célula
de medição de binário. Foi realizado um estudo estatístico descritivo e
inferencial.
Resultados: Segundo a média, ambos os torquímetros apresentaram valores
inferiores ao torque pré-selecionado, exibindo resultados significativamente
diferentes. O mesmo se pode confirmar segundo a análise entre os dois sistemas
toggle-style e spring-style, dado que ambos demonstraram ser significativamente
diferentes. O toggle-style obteve sempre valores inferiores ao spring-style. No
entanto, segundo a análise de variância, os dois torquímetros apresentaram
semelhanças, tendo assim uma dispersão de torque similar.
Conclusão: Dentro das limitações deste estudo, podemos concluir que os dois
torquímetros analisados apresentaram valores de torque inferiores aos préselecionados. Verificou-se também que o tipo de sistema mecânico do torquímetro também pode originar valores de torque distintos.
Introduction: Torque wrenches are indispensable in a prosthetic oral rehabilitation with dental implants. There are several types of manual torque wrenches, of which toggle-style and spring-style stand out. The main objective of this research was to analyze and evaluate the mechanical behavior of two different torque wrenches used in a prosthetic oral rehabilitation with dental implants. Materials and Methods: A laboratory study was carried out to test the mechanical behavior of two torque wrenches with different dynamometric systems, spring-style and toggle-style. For each torque wrench it was prepared 3 working tables with an analogue, straight standard abutment and straight screw. For each torque wrench, 30 tightening/loosening cycles were performed for the pre-selected values, 10, 20 N.cm and 35 N.cm, and recorded the value measured by a torque measurement cell. A descriptive and inferential statistical analysis was carried out. Results: According to the average, both presented values lower than the preselected torque, showing significantly different results. The same can be confirmed according to the toggle-style and spring-style systems, since both proved to be significantly different. Toggle-style was always inferior to springstyle. However, according to the variance, the two torquemeters showed similarities, thus having a similar torque dispersion between them. Conclusion: Within the limitations of this research, it can be concluded that the analyzed torque wrench systems presented inferior values to those pre-selected. Also, the type of dynamometric system can also give different torque values.
Introduction: Torque wrenches are indispensable in a prosthetic oral rehabilitation with dental implants. There are several types of manual torque wrenches, of which toggle-style and spring-style stand out. The main objective of this research was to analyze and evaluate the mechanical behavior of two different torque wrenches used in a prosthetic oral rehabilitation with dental implants. Materials and Methods: A laboratory study was carried out to test the mechanical behavior of two torque wrenches with different dynamometric systems, spring-style and toggle-style. For each torque wrench it was prepared 3 working tables with an analogue, straight standard abutment and straight screw. For each torque wrench, 30 tightening/loosening cycles were performed for the pre-selected values, 10, 20 N.cm and 35 N.cm, and recorded the value measured by a torque measurement cell. A descriptive and inferential statistical analysis was carried out. Results: According to the average, both presented values lower than the preselected torque, showing significantly different results. The same can be confirmed according to the toggle-style and spring-style systems, since both proved to be significantly different. Toggle-style was always inferior to springstyle. However, according to the variance, the two torquemeters showed similarities, thus having a similar torque dispersion between them. Conclusion: Within the limitations of this research, it can be concluded that the analyzed torque wrench systems presented inferior values to those pre-selected. Also, the type of dynamometric system can also give different torque values.
Description
Keywords
Implantes dentários Torque Tensões mecânicas Torquímetro Dental implants Torque Mechanical stress Torque wrench