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Effects of two endodontic sealers on the bond strength of two fiber posts / 华西口腔医学杂志
West China Journal of Stomatology ; (6): 497-500, 2011.
Artículo en Chino | WPRIM | ID: wpr-235009
ABSTRACT
<p><b>OBJECTIVE</b>To study the effects of two different endodontic sealers on the bond strength of two fiber posts cemented with adhesive resin cement.</p><p><b>METHODS</b>Twenty-eight crownless human maxillary central incisors were prepared with the step-back technique and randomly divided into four groups according endodontic sealer and fiber Group A, Cortisomol sealer+Matchpost fiber post; Group B, Cortisomol sealer+Macrolock fiber post; Group C, Guttaflow sealer+Matchpost fiber post; Group D, Guttaflow sealer+Macrolock fiber post. One week after fiber posts were bonded, a thin-slice push-out test was performed in a universal machine. Morphologic structure of the root canal dentin surfaces etched and the adhesive interfaces were examined by scanning electron microscopy (SEM).</p><p><b>RESULTS</b>The bond strengths of 4 groups were (7.06 +/- 3.22), (9.31 +/- 3.61), (6.90 +/- 3.13), (9.71 +/- 3.42) MPa. The bond strengths of group B and D were significantly higher than that of group A and C (P < 0.05). There was no significant difference between group A and C, group B and D (P > 0.05). The cervical third had the highest mean push-out bond strength, next to middle third and apical third (P < 0.01). SEM showed that larger numbers of the dentin tubules were open after the root canals were etched and penetration of resin tags into the dentinal tubules increased in the coronal root region when compared with the apical root region.</p><p><b>CONCLUSION</b>The shear bond strength doesn't have relationship with endodontic sealers. The serration significantly increases the retention of fiber post. The bond strengths are different at the three root segment sites.</p>
Asunto(s)
Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Tratamiento del Conducto Radicular / Raíz del Diente / Cemento de Óxido de Zinc-Eugenol / Técnica de Perno Muñón / Recubrimiento Dental Adhesivo / Recubrimientos Dentinarios / Cementos de Resina / Dentina / Dimetilpolisiloxanos / Combinación de Medicamentos Límite: Humanos Idioma: Chino Revista: West China Journal of Stomatology Año: 2011 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Tratamiento del Conducto Radicular / Raíz del Diente / Cemento de Óxido de Zinc-Eugenol / Técnica de Perno Muñón / Recubrimiento Dental Adhesivo / Recubrimientos Dentinarios / Cementos de Resina / Dentina / Dimetilpolisiloxanos / Combinación de Medicamentos Límite: Humanos Idioma: Chino Revista: West China Journal of Stomatology Año: 2011 Tipo del documento: Artículo