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Nanostructural changes in dentine caused by endodontic irrigants

Objective: To study nanostructural dentinal changes produced by endodontic irrigants. Study Design: Experimental study. Nanoindentations were performed on peritubular (PD) and intertubular dentine (ID) with an atomic force microscopy. Stiffness and adhesion force were determined before and after app...

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Detalles Bibliográficos
Autores principales: Barón, Marta, Llena, Carmen, Forner, Leopoldo, Palomares, María, González-García, Cristina, Salmerón-Sánchez, Manuel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medicina Oral S.L. 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3731106/
https://www.ncbi.nlm.nih.gov/pubmed/23524430
http://dx.doi.org/10.4317/medoral.18713
Descripción
Sumario:Objective: To study nanostructural dentinal changes produced by endodontic irrigants. Study Design: Experimental study. Nanoindentations were performed on peritubular (PD) and intertubular dentine (ID) with an atomic force microscopy. Stiffness and adhesion force were determined before and after application of 5.25% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA). Normalized differences before and after treatment for stiffness and adhesion forces were calculated. A paired T-test was used to compare stiffnes and adhesion force before and after irrigants application. Results: After treatment with EDTA there was a 29.80% reduction in stiffness in ID and a 63.53% reduction in PD. Adhesion force was reduced by 21.22% and 8.21% respectively. After treatment with 5.25% NaOCI stiffness was reduced by 2.49% in ID and increased by 15.01% in PD. Adhesion force increased by 25.11% and 23.97% respectively. Conclusions: 17% EDTA reduced stiffness and adhesion force in ID and PD. Treatment with NaOCI at 5.25% had no significant effect on stiffness but did affect adhesion force in ID and PD. Key words:Atomic force microscope, stiffness, adhesion force, peritubular dentine, intertubular dentine.