Analysis of the effect of poly[bis(2-hydroxyethylmethacrylate)-phosphazene] and poly[(2-hydroxyethylmethacrylate)-graft-poly(lactic acid)]phosphazene in photo-polymerization contraction of Bis-GMA/TEGDMA [Análisis del efecto del poli[bis(HE
Por:
Martínez-Ceballos E.C., Vera-Graziano R., Martínez-Barrera G., Olea-Mejía O.
Publicada:
1 ene 2012
Resumen:
One of the most important problems on dental polymeric resins is the polymerization shrinkage effect caused by the insitu in teeth. Resin shrinkage decreases the performance of the implant because after resin hardening and adhesion to teeth fissures and other defects are formed. These defects lead to microleakage and caries and also affect the mechanical properties. In order to reduce polymerization shrinkage and avoid these problems the chemical structure of the resin and other components are modified. The characteristics of light cured Bis-GMA/TEGDMA resin modified with poly[bis(2- hydroxy ethyl methacrylate)-phosphazene] and poly[(2-hydroxyethylmethacrylate)-graft- poly(lactic acid)]phosphazene at different concentrations are reported here. The contraction range was studied by the bonded-disk method. Total shrinkagestrain of the photo-polimerized resins varied between 5.3 y 3.8% while the contraction rate occurred between 82.7 and 60.1 ?m/mín. This analysis showed that polymerization shrinkage decreased in inverse proportion to the double bonds present in the resin. © Sociedad Mexicana de Ciencia y Tecnología de Superficies y Materiales.
Filiaciones:
Martínez-Ceballos E.C.:
Facultad de Química, Estudiante de la Maestría en Ciencia de Materiales, Universidad Autónoma del Estado de México, Toluca, Mexico
Vera-Graziano R.:
Instituto de Investigación en Materiales, Departamento de Polímeros, Coyoacán D. F, Mexico
Martínez-Barrera G.:
Facultad de Quimica, Universidad Autónoma del Estado de México, Toluca, Mexico
Olea-Mejía O.:
Facultad de Quimica, Universidad Autónoma del Estado de México, Toluca, Mexico
Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM (CCIQS), Facultad de Química, Universidad Autónoma del Estado de México, Toluca, Mexico
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