Correlation between mechanical properties and stabilization time of chemical bonds in glass-ionomer cements

Menezes-Silva, Rafael; Oliveira, Bruna Medeiros Bertol de; Magalhães, Ana Paula Nogueira de; Bueno, Lígia; Borges, Ana Flávia Sanches; Baesso, Mauro Luciano; Navarro, Maria Fidela de Lima; Nicholson, John W.; Sidhu, Sharanbir K.; Pascotto, Renata Corrêa

doi:10.1590/1807-3107bor-2020.vol34.0053

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…Com nível de significância de 5%. As análises foram realizadas com o programa Jamovi Version 1.2.27.0 (Sydney, Australia) (Menezes- Silva et al, 2020;Martins et al, 2002).…”

Section: Fonte: Autoresunclassified

Propriedades de compômero coloridos - estudo in vitro

Oliveira

Dias

Aragão

et al. 2022

RSD

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O tratamento restaurador na odontopediatria exige um material restaurador que tenha boas propriedades mecânicas, facilidade de manipulação e de uso. Os compômeros coloridos para restauração de dentes decíduos é uma forma de motivação para as crianças no tratamento odontológico, contribuindo para que aceitem o tratamento. O objetivo deste trabalho foi avaliar a dureza de superfície, as resistências a compressão e de união de compômeros coloridos. Para isto, foram confeccionados, corpos de prova de compômeros coloridos twinky star flow nas cores cor azul e rosa (n=15), e resina bulk fill flow. Para a avaliação da resistência de união, os corpos de prova de compômeros coloridos (twinky star flow na cor azul) e resina bulk fill flow com foram confeccionados sobre esmalte bovino (n=16). Todos foram acondicionados individualmente em água destilada por 72 horas, em estufa a 37ºC. Os valores obtidos foram submetidos aos testes Shapiro-Wilk, Levene e análise de variância de um fator. O nível de significância adotado em todas as análises foi de 5%. Não houve diferença estatisticamente significante entre os materiais restauradores na dureza de superfície, nas resistências a compressão e de união. A pigmentação dos compômeros não interfere nos valores de dureza de superfície, resistência a compressão e de união.

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“…Com nível de significância de 5%. As análises foram realizadas com o programa Jamovi Version 1.2.27.0 (Sydney, Australia) (Menezes- Silva et al, 2020;Martins et al, 2002).…”

Section: Fonte: Autoresunclassified

Propriedades de compômero coloridos - estudo in vitro

Oliveira

Dias

Aragão

et al. 2022

RSD

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“…Selecting the ideal restorative material is a significant challenge for clinicians due to the wide variety of dental products available ( 16 , 17 ). Considering the place of GICs in restorative dentistry, particularly from a minimally invasive perspective, these materials require study.…”

Section: Introductionmentioning

confidence: 99%

Correlation between fluoride release, surface hardness and diametral tensile strength of restorative glass ionomer cements

Pardi,

da Cunha,

Cunha

et al. 2024

J Clin Exp Dent

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Background The aim of this study was to determine if there is a correlation between fluoride release, surface hardness, and diametral tensile strength of restorative glass ionomer cements (GICs). Material and Methods Conventional (Riva Self Cure) and resin-modified (Riva Light Cure) GICs were used. Thirty-four samples (ø 6 x 3 mm) were prepared for each cement. The kinetics of fluoride release (n=4) was evaluated over 28 days using a fluoride-selective electrode (ISE 4010-C00). The analysis of surface hardness (n=10) was performed using a microhardness tester (Shimadzu HMV-2000, Japan) with a Knoop indenter and a load of 25 gf for 30 seconds. The diametral tensile strength test (n=10) was conducted on a universal testing machine at a speed of 0.75 mm/min. Fluoride release data were analyzed by two-way repeated measures ANOVA and Bonferroni post hoc test, while independent t-test was used for other analyses (α=0.05). Results Overall, the groups showed higher fluoride release until day 7 and a progressive decrease until day 28. On day 1 and day 21, Riva Self Cure showed a higher level of release than Riva Light Cure ( p =0.026). Riva Light Cure showed higher diametral tensile strength ( p <0.0001) and surface hardness ( p =0.034) than Riva Self Cure. A negative correlation was found, indicating that higher fluoride release is associated with lower surface hardness and diametral tensile strength. Conclusion Fluoride release and mechanical performance are related properties of GICs, and these properties exhibit different values depending on the type of material. Resin-modified GIC release less fluoride but exhibit better mechanical performance compared to conventional GIC. Key words: Diametral Tensile Strength, Fluoride, Glass Ionomer Cement, Surface Hardness.

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“…Glass-ionomer cements are one of the most useful dental materials used in restorative dentistry due to their properties such as the ability of fluoride release, the intrinsic adhesion to the dental structures, the coefficient of thermal expansion similar to the dental structures and their biocompatibility 5 . Despite these benefits, glass ionomers have some limitations such as high wear, solubility, poor mechanical properties, and low strength against occlusal forces 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Comparative of flexural strength, hardness, and fluoride release of two bioactive restorative materials with RMGI and composite resin

et al. 2022

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Aim: This study was fulfilled to evaluate the flexural strength, micro-hardness, and release of two fluoride ions of bioactive restorative materials (Cention N and Activa Bioactive), a resin modified glass ionomer (Fuji II LC), and a resin composite (Filtek z250). Methods: Forty samples from four restorative materials (Activa Bioactive, Fuji II LC, Cention N, and Filtek Z250) were provided according to the current standards of ISO 4049/2000 guide lines. Subsequently, the samples were stored for 24 hours and 6 months in artificial saliva, and successively, flexural strength and micro-hardness of the samples were measured. For each studied groups the pH was decreased from 6.8 to 4 in storage solution. The rate of changes in fluoride ion release was measured after three different storage periods of 24 hours, 48 hours, and 6 months in distilled water, according to the previous studies’ method. Two-way ANOVA, One-way ANOVA, Tukey HSD Pair wise comparisons, and independent t-tests were used to analyze data (α= 0.05). Results: The highest flexural strength and surface micro-hardness after 24 hours and also after 6 month were observed for Cention N(p<0.001).Flexural strength of all samples stored for 6 months was significantly lower than the samples stored for 24 hours(p<0.001). The accumulative amount of the released fluoride ion in RMGI, after six-month storage period in distilled water was considerably higher (p<0.001) than 24 hours and 48 hours storage. The amount of fluoride ion release with increasing acidity of the environment (from pH 6.8 to 4) in Fuji II LC glass ionomer was higher than the bioactive materials (p<0.05). Conclusion: The flexural strength of RMGI was increased after storage against the Activa Bioactive,Cention N and Z250 composite. Storage of restorative materials in artificial saliva leads to a significant reduction in micro hardness. The behavior and amount of released fluoride ions in these restorative materials, which are stored in an acidic environment, were dependent on the type of restorative material.

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Correlation between mechanical properties and stabilization time of chemical bonds in glass-ionomer cements

Cited by 10 publications

References 23 publications

Propriedades de compômero coloridos - estudo in vitro

Propriedades de compômero coloridos - estudo in vitro

Correlation between fluoride release, surface hardness and diametral tensile strength of restorative glass ionomer cements

Comparative of flexural strength, hardness, and fluoride release of two bioactive restorative materials with RMGI and composite resin

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