2012, Number 3
Adhesion-cohesion inter-phase among fiberglass posts, dual cement and dentine before irrigation with two disinfectant materials
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ABSTRACTA great number of fiber-glass post de-cementation cases after adhesion to root canal have been reported. The aim of the present study was to assess effectiveness of two disinfectant materials: 5.25% sodium hypochlorite (NaCIO), and 2% Chlohexidine used as irrigation agents before cementation of fiberglass posts (FGP) in the process of adhesion-cohesion, using dual cement (DC). Thirty teeth, endodontically treated with previously sectioned clinical crowns, were prepared to each receive a FGP. Samples were divided into three groups and different root canal irrigation techniques were used: 1. 5.25% NaCIO, 2. 2% Chlorhexidine, and 3. Water. Samples were transversely sectioned with diamond disc at the cervical third (CT) and at the middle third (MT), thus, 60 study samples were obtained. Observation and measurement of dual cement/dentin (DC/D) and dual cement/post (DC/P) were conducted with scanning electron microscope. These measurements were taken at MT and CT. Gaps present at the DC/D and DC/P on surfaces free of adhesion-cohesion were also measured. Data analysis revealed significant differences with respect to effectiveness with adhesion percentages in DC/D dentine when using 5.25% NaCIO technique versus 2% Chlorhexidine and water techniques. There was no observed significant difference in mean adhesion percentages in CT and MT. 5.25% NaCIO irrigation technique proved to be the one causing less DC/D and DC/P interference. It showed higher adhesion percentage both in DC/D inter-phase and DC/P cohesion inter-phase.
Jiménez M, Mantellini G. Restauración de dientes tratados endodónticamente con muñones de resina reforzada con fibras de vidrio. Caso clínico. Universidad Central de Venezuela, Departamento de Cariología, Ciencias Restauradoras y Endodónticas, University of Michigan- Escuela de Odontología, Michigan. 39(3). 2001.
López P, Celis L, Guerrero J. Influencia de la desinfección de conductos radiculares con clorhexidina al 2.0% en la resistencia al desalojo de postes de fibra de vidrio colocados con cementos a base de resina (estudio in vitro). Tesis presentada en la Universidad Nacional Autónoma de México, Septiembre 2005.