THE EFFECT OF Musa acuminata AND Ocimum basilicum MIXED EXTRACTS TO THE SURFACE HARDNESS OF BIOACTIVE COMPOSITE RESIN

Puspitasari, Dewi; Apriasari, Maharani Laillyza; Rahayu, Dewi Siti; Rachmadi, Priyawan

doi:10.20527/dentino.v5i2.8970

Cited by 2 publications

(4 citation statements)

References 15 publications

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“…Hardness is also used as an indirect method of measuring the DC; the higher the conversion rate, the higher the hardness value. 31,32 The initial results of microhardness in the conventional and bulk-fill RBCs in this study were similar, which may have been due to the loading of similar filler content in these 2 types of composites. The results of the studies by Ilie et al 9 and Puspitasari et al 31 demonstrated that some bulk-fill RBCs show less hardness than conventional RBCs with the same filler content.…”

Section: Discussionsupporting

confidence: 57%

“…31,32 The initial results of microhardness in the conventional and bulk-fill RBCs in this study were similar, which may have been due to the loading of similar filler content in these 2 types of composites. The results of the studies by Ilie et al 9 and Puspitasari et al 31 demonstrated that some bulk-fill RBCs show less hardness than conventional RBCs with the same filler content. This difference is related to the presence of pre-polymerized organic fillers in addition to inorganic fillers in these materials.…”

Section: Discussionsupporting

confidence: 57%

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Mechanical performance of a conventional resin composite and its bulk-fill restorative counterpart after long-term accelerated aging

Naser Alavi,

Ghavami-Lahiji,

Habibi

2023

Dent. Med. Probl.

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Background. The long-term mechanical properties and stability of various resin composites in areas under stress are questionable.Objectives. The aim of the study was to determine the effects of long-term hydrothermal aging on the mechanical properties of a microhybrid conventional resin composite and its bulk-fill counterpart.Material and methods. We used a conventional and high-viscosity restorative bulk-fill resin-based composites (RBCs) from one company. Bar-shaped specimens of each type of resin composite were fabricated using steel molds and divided into 2 groups. The specimens were stored at 37°C for 24 h, and half of the specimens in each group were subjected to the 3-point bending flexural test and microhardness measurement. The remaining specimens were aged for 10,000 thermal cycles between 5°C and 55°C, and then subjected to flexural testing and microhardness measurement. A Vickers microhardness tester was used to estimate the surface microhardness of the specimens. Data was analyzed using an independent t test and the Mann-Whitney U test. The statistical significance level was set at p ≤ 0.05. Scanning electron microscopy (SEM) was used to investigate the surface of each material.Results. The bulk-fill RBC showed similar flexural strength and modulus to its conventional counterpart before aging. The flexural strength of both resin composites was significantly decreased after thermocycling (p < 0.001). Hydrothermal aging had no significant effects on the flexural modulus (p = 0.84). There was a significant decrease in the surface microhardness of the bulk-fill RBC. Scanning electron microscopy photomicrographs showed several pits as a result of the exfoliation of the filler particles on the surface of the bulk-fill RBC after aging.Conclusions. The flexural strength of both resin composites decreased significantly after aging. The flexural properties, surface changes and microhardness of the bulk-fill type were additionally affected by the aging process.

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Section: Discussionsupporting

confidence: 57%

Section: Discussionsupporting

confidence: 57%

Mechanical performance of a conventional resin composite and its bulk-fill restorative counterpart after long-term accelerated aging

Naser Alavi,

Ghavami-Lahiji,

Habibi

2023

Dent. Med. Probl.

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“…cual el yeso incorpora suficiente vapor de agua para iniciar la reacción del fraguado, por una proporción polvo/ agua; alterada 20 .…”

Section: Discussionunclassified

“…La muestra fue posicionada lo más cerca posible a la base, formando un ángulo de 90°. Luego, el sistema se activó a una velocidad de 2 mm/min con fuerza en la misma dirección, pero en diferente sentido hasta que ocurrió la fractura de la muestra [20][21][22][23][24] (Figura 4).…”

Section: Materiales Y Métodosunclassified

Análisis In vitro de yesos dentales de alta resistencia y baja expansión disponibles en Perú

Cruzado-Oliva,

Farfán-Verástegui,

Alarco-La Rosa

et al. 2023

Odontol Sanmarquina

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Objetivo. Comparar la dureza, estabilidad dimensional y resistencia a la compresión de los yesos dentales de alta resistencia y baja expansión disponibles en el Perú. Métodos. Se realizó un estudio descriptivo, observacional y transversal. Se confeccionaron muestras de forma cilíndrica (8) y rectangular (8), de siete yesos dentales de alta resistencia y baja expansión. Se evaluó la dureza utilizando el Durómetro Universal Identec, la estabilidad dimensional con un calibrador digital y la resistencia a compresión con la Máquina de Ensayo Universal. Para determinar si hay diferencia en cada una de estas propiedades se empleó el análisis de varianza, la prueba F y la prueba de Duncan. Además, se empleó la prueba de comparación de medias, t de Student, para evaluar si difieren con los valores de la ADA (Asociación Dental Americana). Resultados. La dureza, estabilidad dimensional y resistencia a la compresión promedio de los yesos dentales presentó diferencias significativas (p<0.05) entre cada uno con los promedios estándares establecidos por la ADA. Conclusiones. En relación resistencia a la compresión el 100% de los yesos analizados cumplen con los parámetros establecidos por la ADA, en relación estabilidad dimensional solo el 28.6% y el 100% no alcanzan los estándares de dureza promedio establecidos por la ADA.

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THE EFFECT OF Musa acuminata AND Ocimum basilicum MIXED EXTRACTS TO THE SURFACE HARDNESS OF BIOACTIVE COMPOSITE RESIN

Cited by 2 publications

References 15 publications

Mechanical performance of a conventional resin composite and its bulk-fill restorative counterpart after long-term accelerated aging

Mechanical performance of a conventional resin composite and its bulk-fill restorative counterpart after long-term accelerated aging

Análisis In vitro de yesos dentales de alta resistencia y baja expansión disponibles en Perú

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