A carregar...
Publicação
Manufacturing Order Matters?
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 712.55 KB | Adobe PDF |
Orientador(es)
Resumo(s)
This study assessed how manufacturing sequence affects the metallurgical and mechanical properties of two nickel-titanium instruments: Procodile Q (heat-treated before machining) and Procodile +HT (heat-treated after machining). Both instruments (n = 74 each, size 25/0.06) were analysed for design, NiTi composition, phase transformation temperatures and mechanical performance (cyclic fatigue at 20°C and 35°C, torsional fatigue, bending load, buckling strength, cutting ability, microhardness and roughness). The Student's t-test and Mann–Whitney test were used for statistical analysis (α = 5%). Results showed that both instruments had similar design and composition. Procodile Q had a slightly higher austenitic start temperature and superior cyclic fatigue resistance at 20°C and 35°C (p < 0.001), along with higher surface roughness (p = 0.041). Other mechanical properties showed no significant differences (p > 0.05). These findings suggest that the order of machining and heat treatment of Procodile instruments had minimal impact on overall performance, primarily affecting cyclic fatigue resistance and surface roughness.
Descrição
Funding Information: This work was supported by the Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro and Conselho Nacional de Desenvolvimento Científico e Tecnológico. The authors acknowledge Fernanda Carvalho for running the differential scanning calorimetry tests on the endodontic files. The Article Processing Charge for the publication of this research was funded by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) (ROR identifier: 00x0ma614). Publisher Copyright: © 2025 The Author(s). Australian Endodontic Journal published by John Wiley & Sons Australia, Ltd on behalf of Australian Society of Endodontology Inc.
Palavras-chave
Differential scanning calorimetry Geometric design Heat treatment Mechanical performance Metallurgy NiTi instruments General Dentistry