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Evaluación de las características físico-químicas y resistencia adhesiva del tejido dental sano expuesto a removedores enzimáticos de caries

Authors: Matamoros Villalobos, Carolina;

Evaluación de las características físico-químicas y resistencia adhesiva del tejido dental sano expuesto a removedores enzimáticos de caries

Abstract

El objetivo de este estudio fue evaluar los cambios físicos-químicos y la resistencia adhesiva de dentina humana sana expuesta a removedores enzimáticos de caries. Se recolectaron 45 terceros molares humanos sanos, los cuales se prepararon para obtener muestras estandarizadas, en tres grupos: Control, Papacarie y Brix 3000. Se colocaron los removedores enzimáticos de caries de acuerdo con las instrucciones del fabricante en muestras de dentina sana. Posteriormente, fueron eliminados mecánicamente con una torunda de algodón y se prepararon muestras específicas para microscopía electrónica de barrido (SEM) y de fuerza atómica (AFM), composición química mediante la espectroscopía de absorción infrarroja (FTIR) y fotoelectrónica de rayos X(XPS), además para evaluación de la humectabilidad con un goniómetro y para la prueba de resistencia adhesiva en una máquina de prueba universal, en esta se utilizó un protocolo adhesivo de grabado total y de autograbado. El análisis SEM mostró que el número visible de túbulos dentinarios se obliteraron en la muestra expuesta al grupo Papacarie. En el AFM se observó un aumento significativo en la rugosidad después de la exposición al Brix 3000 (p<0.0001). La composición química en el FTIR no se vio alterada, mientras que en el XPS se observó una tendencia al aumento en la proporción N/Ca y disminución en P/Ca, además, ambos productos dejan depósitos en un espesor de capa de entre los 3- 4 nanómetros. La goniometría reveló una disminución significativa (p<0.0001) del ángulo de contacto después de la colocación de los removedores, mientras que resistencia adhesiva reveló que solo la estrategia adhesiva de grabado total fue significativa (p<0001). Aunque la presencia de removedores enzimáticos parece crear cambios micromorfológicos, en la superficie, rugosidad y el ángulo de contacto de la dentina sana, no modificaron la estructura química y el comportamiento de la resistencia adhesiva de los materiales restauradores

The objective of this study was to evaluate the physical-chemical changes and the adhesive resistance of healthy human dentin exposed to enzymatic caries removers. Forty-five healthy human third molars were collected and prepared to obtain standardized samples, in three groups: Control, Papacarie, and Brix 3000. Enzymatic caries removers were placed according to manufacturer's instructions on healthy dentin samples. Subsequently, they were mechanically removed with a cotton swab and specific samples were prepared for scanning electron microscopy (SEM) and atomic force microscopy (AFM), chemical composition by infrared absorption spectroscopy (FTIR) and X-ray photoelectron (XPS), in addition to evaluating the wettability with a goniometer and for the bond strength test in a universal testing machine, in which a total-etch and self-etch adhesive protocol was used. SEM analysis showed that the visible number of dentinal tubules were obliterated in the sample exposed to the Papacarie group. A significant increase in roughness was observed in the AFM after exposure to Brix 3000 (p<0.0001). The chemical composition in the FTIR was not altered, while in the XPS an increasing trend in the N/Ca ratio and a decrease in P/Ca was observed, in addition, both products leave deposits in a layer thickness of between 3-4 nanometers. Goniometry revealed a significant decrease (p<0.0001) in the contact angle after placement of the removers, while bond strength revealed that only the total-etch adhesive strategy was significant (p<0001). Although the presence of enzymatic removers seems to create micromorphological changes in the surface, roughness, and contact angle of xiii sound dentin, they did not modify the chemical structure and adhesive strength behavior of restorative materials.

UCR::Vicerrectoría de Investigación::Sistema de Estudios de Posgrado::Salud::Maestría Profesional en Odontología con énfasis en Odontopediatría

Country
Costa Rica
Related Organizations
Keywords

Papaína, Mínima Invasión, ODONTOLOGÍA, Dentina, Caries Dental

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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