EFEITO DO DESAFIO EROSIVO IN VITRO NA MASSA E RUGOSIDADE SUPERFICIAL DE DIFERENTES MATERIAIS RESTAURADORES

2016 ◽  
Author(s):  
Thereza Christina Lopes Coutinho
Keyword(s):  
Surface Roughness ◽  
Orange Juice ◽  
Composite Resin ◽  
Soft Drink ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
All Solutions ◽  
Post Hoc ◽  
Ionomer Cement

RESUMO O objetivo deste estudo in vitro foi avaliar alteração de massa e de rugosidade superficial utilizando balança eletrônica e rugosímetro respectivamente, de quatro materiais odontológicos: resina composta (RC), selante resinoso (SR), cimento de ionômero de vidro resinoso (CIVR) e cimento de ionômero de vidro (CIV) convencional após serem submetidos à desafio erosivo (DE). Foram confeccionados 24 corpos de prova de cada material sendo divididos em 3 grupos (N=8): GI – bebida carbonatada a base de cola (Coca cola®; pH 2.6); GII – suco de laranja a base de soja (Ades®; pH 4.4); e GIII – saliva artificial (SA) (pH 7; controle). DE foi realizado através de imersão nas respectivas soluções (20mL/amostra) durante 3x/5min/dia por cinco dias. As amostras foram armazenadas em SA entre os DE e pernoite. Os dados foram analisados estatisticamente no software SPSS v.20 através dos testes ANOVA, post-hoc de Tukey, Kruskal-Wallis e Student-Newman Keuls com nível de significância de p<0,05. Observou-se que, todos os materiais apresentaram alteração de massa, sendo que RC e SR apresentaram aumento, porém significante (p<0,01) apenas para SR; já CIVR e CIV tiveram perda significativa (p<0,01). Em relação à rugosidade, todas as soluções promoveram alteração, porém não significativa (p>0,05). Houve aumento da rugosidade da RC no suco de laranja e do SR, no refrigerante e SA. O CIV apresentou aumento da rugosidade no refrigerante e o CIVR, redução em todas as soluções. Concluiu-se que, as soluções testadas promoveram redução de massa e o refrigerante aumento de rugosidade apenas para os materiais ionoméricos, principalmente, o convencional. Palavras-chave: Resina composta, Cimento de ionômero de vidro, Selante de sulcos e fissuras, Erosão   ABSTRACT The aim of this in vitro study was to evaluate mass change and surface roughness using analytical scale and profilometer respectively, of four dental materials: composite resin (CR), resin sealant (RS), resin-modified glass-ionomer cement (RMGIC) and glass-ionomer cement (GIC) for restoration after being submitted to erosive challenge (EC). Twenty-four samples of each material were prepared and divided into 3 groups (n=8): GI- cola soft drink (Coca-Cola®; pH 2.6); GII – soya orange juice (Ades®; pH 4.4); and GIII - artificial saliva (AS) (pH 7; control). EC was conducted by immersion in the respective solutions (20ml/sample) for 3x/5min/day during five days. Samples were stored in AS between EC and overnight. Data were statistically analyzed using SPSS v.20 software through ANOVA, Tukey’s post-hoc, Kruskal-Wallis and Student-Newman- Keuls with significance level of p<0.05. It was observed that all materials had mass change, and CR and SR showed an increase, being significant (p<0.01) only for SR; whereas RMGIC and GIC had significant loss (p<0.01). Regarding the surface roughness, all solutions promoted changes, but not significant (p>0.05). There was an increase in roughness of CR in orange juice and SR in soft drink and AS. GIC showed increased roughness in soft drink and RMGIC, reduction in all solutions. It was concluded that, the tested solutions promoted mass reduction and the soft drink increased roughness only for the ionomeric materials, mainly, the self-cured. Keywords: Composite resin, Glass-ionomer cement, Pit and fissure sealant, Erosion  

Perbedaan nilai kekerasan permukaan semen Glass Ionomer (GIC) dan modifikasi resin semen Glass Ionomer (RMGIC) akibat efek cairan lambung buatan secara in vitro

2017 ◽  
Vol 1 (2) ◽  
pp. 77
Author(s):  
Nuni Maharani ◽  
Agung Wibowo ◽  
Dudi Aripin ◽  
Mohammad Richata Fadil
Keyword(s):  
Surface Roughness ◽  
Gastroesophageal Reflux Disease ◽  
Gastroesophageal Reflux ◽  
Gastric Juice ◽  
Reflux Disease ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Post Hoc ◽  
Ionomer Cement

Pendahuluan: Gastroesophageal reflux disease (GERD) didefinisikan sebagai reflex otot esophagus atau spincter, yang memungkinkan asam lambung bergerak naik melalui kerongkongan hingga masuk kedalam rongga mulut. Asam lambung memiliki pH berkisar 1 hingga 1.5, berada di bawah pH kritis email sebesar 5.5 yang dapat menyebabkan terjadinya demineralisasi email, dentin, dan sementum. Tujuan penelitian adalah untuk membedakan nilai kekasaran permukaan semen glass ionomer (GIC) dan modifikasi resin semen glass ionomer (RMGIC) akibat efek cairan lambung buatan.  Metode: Penelitian yang dilakukan merupakan penelitian eksperimental murni secara in vitro. Sampel dipersiapkan sebanyak 40 buah, yang terdiri dari 20 sampel semen glass ionomer (GIC) dan 20 sampel modifikasi resin semen glass ionomer (RMGIC). Seluruh sampel dibagi ke dalam 4 kelompok, masing-masing terdiri dari 10 sampel yaitu (1) kelompok GIC direndam dalam saliva buatan, (2) kelompok RMGIC direndam dalam saliva buatan, (3) kelompok GIC direndam dalam cairan lambung buatan selama 3 kali 7 menit dan setelahnya direndam kembali dalam saliva buatan, dan (4) kelompok RMGIC direndam dalam cairan lambung buatan selama 3 kali 7 menit dan setelahnya direndam kembali dalam saliva buatan. Perendaman dilakukan selama 9 hari. Nilai kekasaran diukur dengan menggunakan surface roughness tester (Profilometri). Hasil dianalisis secara statistik dengan menggunakan uji ANAVA dan analisis post-hoc dengan menggunakan t-test. Hasil: Terdapat perbedaan nilai kekasaran permukaan semen glass ionomer (GIC) dan modifikasi resin semen glass ionomer (RMGIC) akibat efek cairan lambung buatan. Simpulan: Paparan cairan asam lambung pada pasien GERD dapat mempengaruhi kekasaran permukaan bahan restorasi GIC dan RMGIC. Kata kunci: Gastroesophageal reflux disease, Kekasaran permukaan, semen glass ionomer, modifikasi resin semen glass ionomer, profilometri ABSTRACTIntroduction: Gastroesophageal reflux disease (GERD) is defined as involuntary muscle relaxing of the upper esophageal sphincter, which allows refluxed acid to move upward through the esophagus into the oral cavity. The gastric acid has pH between 1 and 1.5, far below the critical pH of 5.5 at which tooth enamel will dissolve. Gastric juice has been shown to demineralize enamel, dentin, and root cementum. Methods: Fourthy samples of each restorative material, a conventional glass ionomer cement (20 samples) and a resin modified glass ionomer cement (20 samples), were prepared and divided into four groups, each group consist of 10 samples. Group (1) group of GIC immersed in simulated saliva and group (2) group of RMGIC immersed in simulated saliva, both control groups immersed for 9 days. Group (3) were group GIC and group (4) were RMGIC, both groups immersed in simulated saliva for 9 days and in between both groups immersed in gastric juice every 3 times a day for 7 minute. Each group subjected to profilometric analysis. The profilometric values were statistically analyzed using ANOVA and 2-way analysis of variance (post-hoc). Results: There are differences between GIC and RMGIC after immersion in gastric juice. Conclusion: Surface roughness of all tested materials were affected by the simulated gastric juice.Keywords: Gastroesophageal reflux disease, surface roughness, glass ionomer cement, resin modified glass ionomer cement, profilometer

In Vitro Effect of Simulated Tooth Brushing and Children’s Mouth Rinses on Physical Properties of Glass Ionomer Cement

2020 ◽  
Vol 44 (5) ◽  
pp. 342-347
Author(s):  
Natyla ML Silva ◽  
Victor G Costa ◽  
Letícia M Gonçalves ◽  
Isabella A Gomes ◽  
Marco Aurélio B Paschoal
Keyword(s):  
Surface Roughness ◽  
Glass Ionomer Cement ◽  
Tooth Brushing ◽  
Control Group ◽  
Glass Ionomer ◽  
Intergroup Comparison ◽  
Vitro Effect ◽  
Dependent Samples ◽  
Ionomer Cement

Objective: The present study investigated the erosive potential of children’s mouthrinses on glass ionomer cement (GIC) samples after simulated toothbrushing. Study design: Forty round-shaped samples of GIC were divided into 3 groups: G1- cetylpyridinium chloride, G2- xylitol and triclosan and G3–Malva sylvestris and xylitol and G4–distilled water as a control group. Prior to the main tests, the samples were submitted to the surface roughness measurement (Ra) and weight analysis (W). Afterward, they were brushed twice day (2× / day) for 15 days and immersed in mouthrinses after the last daily brushing. The final surface roughness (R2) and weight (W2) were determined after completing the tooth brushing-mouth rinsing cycles and the real increase in roughness (ΔRa) and real weight loss (ΔW) were calculated. In addition, stereoscopic images taken at 30× magnification. The data was analyzed by one-way ANOVA and Tukey-test post hoc tests for intergroup comparison and the T-test for dependent samples (α = 0.05). Results: Only group G2 showed increased in roughness ΔRa (1.53 ± 0.94) whereas ΔW values were not significant. However, evident cracks and voids were verified for all tested children’s rinses. Conclusion: Thus, children’s mouthrinse containing xylitol / triclosan increased the GIC roughness, especially when associated with brushing.

A Fluoride-containing Composite Resin—An In Vitro Study of a New Material for Orthodontic Bonding

1989 ◽  
Vol 16 (3) ◽  
pp. 207-212 ◽  
Author(s):  
P. A. Cook ◽  
C. C. Youngson
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
The Other ◽  
Glass Ionomer ◽  
New Material ◽  
Bond Strengths ◽  
Ionomer Cement

The shear/peel bond strength of a new material, a ‘hybrid’ of a composite resin and a glass ionomer cement, was compared in vitro with the bond strengths of a composite resin and of a glass ionomer cement. The new material had a significantly greater bond strength than the other materials tested and its properties were very similar to the composite resin. Unlike the glass ionomer cement, etching of the enamel before applying the adhesive is required. The clinical indications for using this new cement are discussed.

In Vitro Evaluation of Microleakage and Microhardness of Ethanolic Extracts of Propolis in Different Proportions Added to Glass Ionomer Cement

2016 ◽  
Vol 40 (2) ◽  
pp. 136-140 ◽  
Author(s):  
Mustafa Altunsoy ◽  
Mehmet Tanrıver ◽  
Uğur Türkan ◽  
Mehmet Emin Uslu ◽  
Sibel Silici
Keyword(s):  
Glass Ionomer Cement ◽  
Antibacterial Properties ◽  
Dental Practice ◽  
Glass Ionomer ◽  
Tukey Test ◽  
Ethanolic Extracts ◽  
Post Hoc ◽  
One Way Anova ◽  
Ionomer Cement

Objective: To evaluate the effect of ethanolic extracts of propolis (EEP) addition in different proportions to glass ionomer cement (GIC) on microleakage and microhardness of GIC. Study design: The cement was divided into four groups: one using the original composition and three with 10%, 25%, and 50% EEP added to the liquid and then manipulated. For microleakage assessment, sixty primary molars were randomly divided into four groups (n=15). Standard Class II cavities were prepared and then filled with EEP in different proportions added to GICs. Microleakage test was performed using a dye penetration method. The data were analyzed using one-way ANOVA and Mann - Whitney U tests (α = 0.05). Disc shaped specimens were prepared from the tested GIC to determine Vickers hardness (VHN). The data were analyzed using one-way ANOVA and post hoc Tukey test (α = 0.05). Results: There were no statistically significant differences between the groups in terms of microleakage (p &gt; 0.05). There were statistically significant differences between the VHN values of groups (p &lt; 0.05). Increasing addition of EEP to GIC statistically significantly increased VHN value of GIC (p &lt; 0.05). Conclusions: The addition of EEP to GIC increased the microhardness of the GIC and did not adversely affect the microleakage. Thus, it might be used during routine dental practice due to its antibacterial properties

scholarly journals Compressive Strength of a Glass Ionomer Cement Under the Influence of Varnish Protection and Dietary Fluids

2018 ◽  
Vol 20 (3) ◽  
pp. 61-69
Author(s):  
L.O.L. Bohner DDS, MSc, Ph ◽  
L.H.M. Prates
Keyword(s):  
Compressive Strength ◽  
Orange Juice ◽  
Soft Drink ◽  
Glass Ionomer Cement ◽  
Distilled Water ◽  
Glass Ionomer ◽  
Immersion Period ◽  
Compressive Strength Test ◽  
Student’S T ◽  
Ionomer Cement

The objective of this study was to evaluate the compressive strength of a glass ionomer cement (GIC) under the influence of varnish protection and dietary fluids. Eighty cylindrical test specimens were made from GIC and distributed into four groups (G1, G2, G3, G4) according to the dietary fluid. Each group was further divided into subgroups A and B according to the presence or absence of varnish protection. The eight subgroup samples were stored in distilled water for 30 days and received the following treatments for 14 days: G2A: varnish protection and immersion in soft drink, G2B: no varnish protection and immersion in soft drink, G3A: varnish protection and immersion in orange juice, G3B: no varnish protection and immersion in orange juice, G4A: varnish protection and immersion in yogurt, G4B: no varnish protection and immersion in yogurt. The immersion procedure was performed three times a day, for 15 minutes at a time, for a total of 14 days. The samples from subgroups G1A (with varnish) and G1B (without varnish) were used as controls and stored in distilled water only for 30 days. The samples were submitted to a compressive strength test after the immersion period. The results were analyzed using the ANOVA 2, Tukey test (5%) and Student’s t-test (5%). There were no significant differences between the subgroups, except for the subgroup with varnish protection and immersion in orange juice, which showed reduced GIC compressive strength.

scholarly journals Comparison of Shear Bond Strength of Resin Reinforced Chemical Cure Glass Ionomer, Conventional Chemical Cure Glass Ionomer and Chemical Cure Composite Resin in Direct Bonding Systems: An in vitro Study

2013 ◽  
Vol 14 (1) ◽  
pp. 21-25 ◽  
Author(s):  
T Praveen Kumar Reddy ◽  
Kolasani Srinivasa Rao ◽  
Garlapati Yugandhar ◽  
B Sunil Kumar ◽  
SN Chandrasekhar Reddy ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Glass Ionomer Cement ◽  
Composite Resins ◽  
Glass Ionomer ◽  
Bonding System ◽  
Bonding Systems ◽  
Ionomer Cement

ABSTRACT The acid pretreatment and use of composite resins as the bonding medium has disadvantages like scratching and loss of surface enamel, decalcification, etc. To overcome disadvantages of composite resins, glass ionomers and its modifications are being used for bonding. The study was conducted to evaluate the efficiency of resin reinforced glass ionomer as a direct bonding system with conventional glass ionomer cement and composite resin. The study showed that shear bond strength of composite resin has the higher value than both resin reinforced glass ionomer and conventional glass ionomer cement in both 1 and 24 hours duration and it increased from 1 to 24 hours in all groups. The shear bond strength of resin reinforced glass ionomer cement was higher than the conventional glass ionomer cement in both 1 and 24 hours duration. Conditioning with polyacrylic acid improved the bond strength of resin reinforced glass ionomer cement significantly but not statistically significant in the case of conventional glass ionomer cement. How to cite this article Rao KS, Reddy TPK, Yugandhar G, Kumar BS, Reddy SNC, Babu DA. Comparison of Shear Bond Strength of Resin Reinforced Chemical Cure Glass Ionomer, Conventional Chemical Cure Glass Ionomer and Chemical Cure Composite Resin in Direct Bonding Systems: An in vitro Study. J Contemp Dent Pract 2013;14(1):21-25.

An in vitro Study of the Bond Strength of a Glass Ionomer Cement in the Direct Bonding of Orthodontic Brackets

1988 ◽  
Vol 15 (4) ◽  
pp. 247-253 ◽  
Author(s):  
P. A Cook ◽  
C. C. Youngson
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Composite Resin ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Tooth Surface ◽  
Glass Ionomer ◽  
Pre Treatment ◽  
Ionomer Cement

The shear/peel bond strength of a ‘no-mix’ composite orthodontic bonding resin was compared in vitro with that of a glass ionomer cement. The effect of pre-treatment of the enamel, with either phosphoric acid or polyacrylic acid, prior to using the glass ionomer cement was also assessed. The composite resin had a significantly higher bond strength than the glass ionomer cement. Simple prophylaxis and drying of the enamel achieved the best results when using the glass ionomer cement, whilst etching the tooth surface with phosphoric acid produced a significantly poorer bond to the enamel. Investigation of the site of failure showed the composite resin bonded very well to the tooth and less well to the bracket, whilst the glass ionomer adhered significantly better to the bracket base than to the tooth surface.

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