Resistência à flexocompressão de instrumentos endodônticos indicados para canais atresiados e sua correlação com as características morfométricas / Buckling resistance of pathfinders and its geometry
AUTOR(ES)
Georgiana Amaral
DATA DE PUBLICAÇÃO
2009
RESUMO
The aim of this study was to evaluate the buckling resistance of endodontic intruments during the pathfinding of constricted root canals and its lenght influence. Buckling is the elastic deformation of an instrument due to the compressive strenght in its axial direction. The instruments surveyed and tested were: C+File #10, K-File #10 (Maillefer, Switerzland), CC+#10, C-Pilot #10 (VDW, Germany), HI-5 #10 (Miltex, USA) and Pathfinder CS K2 and SS (SybronEndo, USA). Ten instruments from different brands with different lenghts were measured through a optical microscope (Pantec, Panambra, Brazil) aiming to register the diameters, total and useful lenght, taper, helical angles and tip angle, whereas tip details and cross sections were obtained through an electronic microscope MEV (JEOL, JSM-5800). The buckling test was performed at an universal testing machine (EMIC, DL 10.000, Brazil). The maximum load during the elastic deformation was measured by a software while applying increasingly pressure in the axial direction of each instrument till a 1mm deformation. The ANOVA e Tukey test analized the results and revealed that the C+File presented the highest buckling resistance while Pathfinder SS presented the worst results. Different designs might interfere with the results but, in general, the lenght did not have statistical influence.
ASSUNTO(S)
flambagem cateterismo catheterism instrumento endodôntico instrumentos e aparelhos odontológicos resistência de materiais pathfinder endodontic instruments endodontia
ACESSO AO ARTIGO
http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=959Documentos Relacionados
- Diversidade genética entre linhagens de mamoeiro e sua correlação com heterose em híbridos para resistência à doença e características morfoagronômicas
- Desgaste cervical em canais curvos: comparação entre a eficiência de dois instrumentos endodônticos
- Resistência à torção de dois instrumentos endodônticos rotatórios de níquel-titânio
- Resistência à fadiga e comportamento em torção de instrumentos endodônticos de NiTi Profile
- Características físicas, estruturais e mecânicas de instrumentos endodônticos de NiTi ProTaper