Academic literature on the topic 'Resin-modified glass ionomer cement (RMGIC)'
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Journal articles on the topic "Resin-modified glass ionomer cement (RMGIC)"
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Arifin, Fadil Abdillah, Erna Irawati, Indrya Kirana Mattulada, Sarahfin Aslan, Risnayanti Anas, and Nurul Ilmi Mursaling. "Pengaruh Perendaman Susu UHT dan Susu Sapi Segar Terhadap Kekasaran Resin-Modified Glass Ionomer Cement." Sinnun Maxillofacial Journal 3, no. 01 (2021): 29–35. http://dx.doi.org/10.33096/smj.v3i01.4.
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Pendahuluan: Resin-Modified Glass Ionomer Cement (RMGIC) atau Semen Ionomer Kaca Modifikasi Resin merupakan salah satu bahan restorasi yang digunakan di bidang kedokteran gigi. Pengembangan resin-modified glass ionomer cement dimulai sejak tahun 1967 untuk memperbaiki sifat fisik dan mengurangi sensitivitas air dari glass ionomer cement konvensional. Resin-Modified Glass Ionomer Cement (RMGIC) sebagai bahan kedokteran gigi memiliki beberapa keuntungan yaitu: RMGIC dapat melepaskan fluoride, kekuatan RMGIC lebih besar dibandingkan dengan glass ionomer cement konvensional, dan estetika lebih baik daripada Glass Ionomer Cement. Tujuan Penelitian: Untuk mengetahui pengaruh perendaman susu UHT dan susu sapi segar terhadap resin-modified glass ionomer cement. Metode: Penelitian ini menggunakan metode Eksperimental Laboratorium yaitu pengujian yang dilakukan di laboratorium dengan bentuk penelitian berupa Pre Test-Post Test with Control Group Design. Jenis penelitian yang dilakukan adalah True Eksperimental Laboratorium. Hasil: Berdasarkan uji one way anova sebelum perendaman diperoleh p-valuesebesar 0,795 (p>0,05) Berdasarkan uji one way anova setelah perendaman diperoleh p-value sebesar 0,669 (p>0,05) Berdasarkan uji post hoc multiple comparison diperoleh perbedaan rata-rata antara susu sapi segar dan susu UHT sebesar 0,1114500 , untuk aquades dan susu UHT sebesar -0,022000. Kesimpulan: Tidak terdapat perubahan yang signifikan terhadap kekasaran resin-modified glass ionomer cement.
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Ningsih, Diana Setya. "RESIN MODIFIED GLASS IONOMER CEMENT SEBAGAI MATERIAL ALTERNATIF RESTORASI UNTUK GIGI SULUNG." ODONTO : Dental Journal 1, no. 2 (2014): 46. http://dx.doi.org/10.30659/odj.1.2.46-51.
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Glass ionomer cement (GIC) is a material that can release fluoride to prevent caries especially in primary teeth. One of the developments of glass ionomer cement in the world of pediatry dentistry is resin-modified glass ionomer cement (RMGIC). The resin-modified glass ionomer cement were still maintaining the clinical advantages oforiginal material, such as fluoride realease, good compatibility and aestehetically. The mechanical properties of rmgic is more higher than gic. These materials have a better adhesion, higher moisture resistance, and a longer shelft life. This paper review aims to know the ability RMGIC as alternative restorative material for primary teeth.
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Fattah, Zahra, Zahra Jowkar, and Safoora Rezaeian. "Microshear Bond Strength of Nanoparticle-Incorporated Conventional and Resin-Modified Glass Ionomer to Caries-Affected Dentin." International Journal of Dentistry 2021 (April 16, 2021): 1–8. http://dx.doi.org/10.1155/2021/5565556.
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The purpose of this study was to assess the influence of three different types of nanoparticles (silver (SNPs), titanium dioxide (TNPs), and zinc oxide (ZNPs)) on the microshear bond strength of conventional glass ionomer cement (CGIC) and resin-modified glass ionomer cement based on whether CGIC or RMGIC is used with four subgroups (based on the incorporation of SNPs, ZNPs, and TNPs in addition to a control subgroup) (n = 12) as follows: CGIC, CGIC + TNP, CGIC + ZNP, CGIC + SNP, RMGIC, RMGIC + TNP, RMGIC + ZNP, and RMGIC + SNP. After 24 hours, the μSBS of specimens was tested and the obtained data were analyzed using two-way ANOVA and Tukey’s HSD test. The obtained results showed that the incorporation of TNPs in two glass ionomers was not statistically significant compared with the control subgroups ( p > 0.05). In the first group, the highest and lowest mean μSBS were, respectively, observed in the CGIC + SNP subgroup and CGIC + ZNP subgroup. In the second group, RMGIC + ZNP and RMGIC + SNP, respectively, showed the highest and lowest mean μSBS compared to the other subgroups. According to the results, it can be concluded that TNPs can be incorporated into both CGIC and RMGIC without compromising the bond strength of glass ionomers. SNPs and ZNPs can be, respectively, added to CGICs and RMGICs to improve the bond strength of the restoration.
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Thomas, Mathew, Mohammed Mustafa, Reshma Karkera, AP Nirmal Raj, Lijo Isaac, and R. Naveen Reddy. "Comparison of the Solubility of Conventional Luting Cements with that of the Polyacid Modified Composite Luting Cement and Resin-modified Glass Ionomer Cement." Journal of Contemporary Dental Practice 17, no. 12 (2016): 1016–21. http://dx.doi.org/10.5005/jp-journals-10024-1974.
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ABSTRACT Introduction This study was planned to find the solubility of the conventional luting cements in comparison with that of the polyacid-modified composite luting cement and recently introduced resin-modified glass ionomer cement (RMGIC) with exposure to water at early stages of mixing. Materials and methods An in vitro study of the solubility of the following five commercially available luting cements, viz., glass ionomer cement (GIC) (Fuji I, GC), zinc phosphate (Elite 100, GC), polyacid-modified resin cement (PMCR) (Principle, Dentsply), polycarboxylate cement (PC) (Poly - F, Dentsply), RMGIC (Vitremer, 3M), was conducted. For each of these groups of cements, three resin holders were prepared containing two circular cavities of 5 mm diameter and 2 mm depth. All the cements to be studied were mixed in 30 seconds and then placed in the prepared cavities in the resin cement holder for 30 seconds. Results From all of the observed luting cements, PMCR cement had shown the lowest mean loss of substance at all immersion times and RMGIC showed the highest mean loss of substance at all immersion times in water from 2 to 8 minutes. The solubility of cements decreased by 38% for GIC, 33% for ZnPO4, 50% for PMCR, 29% for PC, and 17% for RMGIC. Conclusion The PMCR cement (Principle-Dentsply) had shown lowest solubility to water at the given time intervals of immersion. This was followed by PC, zinc phosphate, and GIC to various time intervals of immersion. How to cite this article Karkera R, Nirmal Raj AP, Isaac L, Mustafa M, Reddy RN, Thomas M. Comparison of the Solubility of Conventional Luting Cements with that of the Polyacid Modified Composite Luting Cement and Resin-modified Glass Ionomer Cement. J Contemp Dent Pract 2016;17(12):1016-1021.
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Halim, Elsandra Novita, Karlina Samadi, and Sri Kunarti. "Efek Antibiofilm Glass Ionomer Cements dan Resin Modified Glass Ionomer Cements Terhadap Lactobacillus acidophilus." Conservative Dentistry Journal 7, no. 2 (2019): 120. http://dx.doi.org/10.20473/cdj.v7i2.2017.120-129.
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Background: Risk factors for developing secondary caries are similar to those resulting in primary caries. The marginal seal of a restoration is one of the important factors predicting clinical success. The antibiofilm effect of materials used for the luting cement of oral function affects oral health. Antibiofilm properties of dental luting materials such as Glass Ionomer Cement (GIC) and Resin Modified Glass Ionomer Cement (RMGIC) may improve the restorative treatment outcome. Purpose: This experiment evaluates the antibiofilm effect of GIC and RMGIC on Lactobacillus acidophilus in vitro. Method: Lactobacillus acidophilus served as test microorganism. The quantitative microtiter plate biofilm assays were used to evaluate the antibiofilm effect of the dental luting materials on early-stage biofilm using a direct contact test (DCT) then continued by reading of Optical Density (OD) of biofilm using ELISA reader at a wavelength of 570nm. Result: GIC and RMGIC showed a decrease of OD value from negative control in all groups. The materials’ elute had effect on both bacterial growth with GIC higher then RMGIC to inhibit Lactobacillus acidophilus biofilm formation. Conclusion: The antibiofilm effect of GIC more effective than RMGIC to inhibit Lactobacillus acidophilus biofilm formation.
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Abdul Rahman, Fatimah Suhaily, Dasmawati Mohamad, Habsah Hasan, and Hasnah Osman. "Physical Properties of Newly Developed Resin Modified Glass Ionomer Cement with Synthesised Coumarin Derivatives." Sains Malaysiana 50, no. 8 (2021): 2433–44. http://dx.doi.org/10.17576/jsm-2021-5008-24.
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The aim of this study was to determine the effects of two types of coumarin derivatives, namely, 3-acetylcoumarin (AC) and coumarin thiosemicarbazone (CT) on surface characteristics such as the roughness, hardness, and morphology of resin-modified glass-ionomer cement (RMGIC). The release of coumarin from the fabricated RMGIC was also investigated. AC and CT at 1.0% (w/w) concentration were added into 0.3 g of RMGIC powder and mixed with 0.1 g of polyacrylic acid. The fabricated RMGIC-AC and RMGIC-CT were evaluated for surface characteristics such as roughness, hardness and topography. The coumarin release of AC and CT from RMGIC was also determined. The RMGIC-CT demonstrated a decreased roughness value among the materials. The surface roughness exhibited by the RMGIC was statistically higher (p < 0.05) than that of fabricated materials. The RMGIC-AC was observed to have the highest hardness value compared to the RMGIC-CT and RMGIC, and this value was significantly higher (p < 0.05). The surface morphologies of the RMGIC-AC and RMGIC-CT showed a number of pores and irregular surfaces. Meanwhile, the surface roughness value of the RMGIC was statistically higher (p < 0.05) than both RMGIC-AC and RMGIC-CT. In conclusion, the large-sized AC particles significantly increased the surface hardness of the fabricated RMGIC. Conversely, the particle size of both coumarins were not influenced the surface roughness value and the coumarin release profile of fabricated RMGICs.
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Maharani, Nuni, Agung Wibowo, Dudi Aripin, and Mohammad Richata Fadil. "Perbedaan nilai kekerasan permukaan semen Glass Ionomer (GIC) dan modifikasi resin semen Glass Ionomer (RMGIC) akibat efek cairan lambung buatan secara in vitro." Padjadjaran Journal of Dental Researchers and Students 1, no. 2 (2017): 77. http://dx.doi.org/10.24198/pjdrs.v1i1.22293.
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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
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Patil, Shruti, Mallikarjun Goud, and Girija Sajjan. "Effect of Short-term Fluoride Release from Various Restorative Cements on Enamel Demineralization: An in vitro Study." International Journal of Prosthodontics and Restorative Dentistry 1, no. 1 (2011): 29–33. http://dx.doi.org/10.5005/jp-journals-10019-1005.
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ABSTRACT Purpose Fluorides are probably the most commonly used anticaries agents. Due to this property they are incorporated into various restorative materials. The rate and amount of fluoride release, however, vary for different materials, which in turn determines the effectiveness of the restorative material in preventing demineralization around the restoration. To evaluate the fluoride release and area of demineralization of resin modified glass ionomers and compomers, and compare them with conventional glass ionomer cement and also to evaluate the relationship between the fluoride release and demineralization. Materials and methods A total of 32 human incisors were chosen and sectioned horizontally at CEJ, and the middle 2 mm of facial enamel isolated and restored with the test materials: Conventional glass ionomer cement (GIC), resin modified glass ionomer cement (RMGIC), compomer and resin composite. The specimens were observed under polarized light microscope with image analyzer to measure the area and depth of demineralization. For fluoride release study, disks of test materials were suspended in deionized water and fluoride release was measured till a period of 4 days. Results The area and depth of demineralization were least around the GIC, followed by RMGIC, compomer and composite (p < 0.05). A negative correlation was found between fluoride release and demineralization which was, however, not statistically significant. Conclusion The 4-day fluoride release was also higher for GIC as compared to RMGIC and Compomer.
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Azizov, AN N., and EM M. Gilmiyarov. "MODERN VIEW OF THE COMBINED USE OF COMPOSITE MATERIAL AND GLASS IONOMER CEMENT." Science and Innovations in Medicine 1, no. 2 (2016): 55–58. http://dx.doi.org/10.35693/2500-1388-2016-0-2-55-58.
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The adhesion of resin-modified glass-ionomer (RMGI) to composite resin plays a very important role in the durability of sandwich restorations. Aim - to explore that co-curing RMGIC and composite resin to GIC using self-etch adhesives and bulk-fill materials may create a chemical bond and improve the bond strengths between these two materials. Materials and methods. Twenty specimens were prepared on gypsum blocks, with wells prepared in them by drilling holes, to retain the RMGIC. The specimens were randomly divided into two groups of 10 specimens each. In group I, after etching and rinsing the surface of cement, a thin layer of an adhesive, which was a Total-Etch type, was applied between RMGIC and the composite resin. In group II, the stage of etching was missed, a Self-Etch adhesive and a thin layer of bulk fill material were applied on the cement surface. Then after curing all the specimens, the shear bond strength was measured using a Bisco Shear bond testing machine. Failure mode was assessed under a stereomicroscope. Results. There were statistically significant differences in bond strengths between the groups (P< 0.05). Failures were predominantly of the cohesive type in all the groups. Conclusion. Based on the results of this study, the use of self-etch adhesive resin on the unset glass-ionomer and using bulk-fill material yielded the highest bond strength in the combined use of glass-ionomer cement and composite material.
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Devara, Aditya Rama, Cecilia G. J. Lunardhi, and Tamara Yuanita. "Perbedaan Kebocoran Tepi antara GIC Konvensional dan Resin Modified GIC pada Restorasi Kelas V (Difference on Microleakage of Conventional GIC and Resin Modified GIC in Class V Restoration)." Conservative Dentistry Journal 6, no. 2 (2016): 77. http://dx.doi.org/10.20473/cdj.v6i2.2016.77-81.
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Background. Microleakage is one of the challenging concerns in direct filling restorations. Restoration material should have good adaptation between the restoration and the cavity walls to seal the cavity in a good way. Glass ionomer cement (GIC) is one of restoration material which indicated for class V cavity. GIC has a good adherence to the cavity wall but fragile to liquid contamination during the setting time. Resin modified glass ionomer cement (RMGIC) is a hybrid glass ionomer cement with the addition of hidroxyethylmethacrylate (HEMA) in the liquid to increase the properties and endurance to liquid contamination. Aim. The aim of this study was to investigate the difference on microleakage of conventional GIC and resin modified GIC in class V restoration. Material and methods. Class V cavities (depth: 2 mm) were prepared on the cervical surface of 32 human first permanent premolars. Teeth were classified into three groups. Group 1: conventional GIC + varnish. Group 2:RMGIC + varnish. All cavities were restored, then stored in artificial saliva at 37ºC for 24 hours. The teeth were immersed in a 1% methylene blue dye solution for 24 hours, and then rinsed in running water, dried, and sectioned longitudinally. The section were assessed for microleakage of dye penetration by two independent evaluators using a digital microscope. Data were collected and statistically analyzed. Results. RMGIC showed no significant difference with conventional GIC. However, there is a slight difference, RMGIC has a slight lower microleakage than conventional GIC. Conclusion. RMGIC showed only slight lower microleakage than conventional GIC, but not significant.
Dissertations / Theses on the topic "Resin-modified glass ionomer cement (RMGIC)"
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Khair, Ro’aa Mohammed Jafar Mohammed Mohammed. "Comparative in vitro study of selected physical properties of Activa, Cention N and Vitremer." University of the Western Cape, 2021. http://hdl.handle.net/11394/8144.
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Magister Chirurgiae Dentium (MChD)<br>Background: This study aimed to determine the association between dimensional change and surface roughness (Ra) of Vitremer, Activa and Cention N after immersing them into two different media: acidic and artificial saliva media for the period of a year. Measurements were made at 10 time intervals during the observation period. Methodology: This was a quantitative and qualitative study. For the quantitative part, a total of 60 specimens were tested, 20 specimens for each material. The 20 specimens were further divided into 10 specimens. Ten were immersed in acidic media and the rest in saliva media. A measurement of the weight, height, and Ra was carried out as follows: day 0, day 1, day 2, day 7, day 21, day 28, day 60, day 90, day 180 and day 365. Scanning electron microscopy (SEM) was used to examine the surface of each material qualitatively pre and post immersion in the two media. For fluoride measurements, an additional five samples from each material were left suspended in the de-ionized water by the use of dental floss. The materials were moved to new specimen jars after the completion of day 1, 2, 3, 4, 5, 6, 7, 14, 21 and 28. All the specimen jars had been kept for the fluoride measurements. Results: Non-parametric tests were used to analyze the data. Linear regression analysis was used to measure the association between weight, height or surface roughness (Ra) and immersion time for a year. The result of this test showed that Vitremer had a significant association between the weight (p = 0.000), height (p = 0.007) and Ra (p = 0.001) when it was immersed in acidic media. On the other hand, when Vitremer was immersed in saliva media, only the weight variable showed a significant association (p = 0.002). For Cention N, significant association was found for only Ra when immersed in acidic media (p = 0.000). Finally, for Activa, all the studied associations; the weight, height and Ra in both media were found to be insignificant. For saliva media, there was a significant weight change between the three materials during all 10 periods of time (p = 0.000). In the first six months, Cention N demonstrated a significant increase in weight changes followed by Vitremer, then Activa. Yet, after a year, the difference between Cention N and Vitremer became insignificant and Activa showed the least weight changes. There was not a significant difference between the materials in terms of height and Ra measurements. The fluoride experiment was not successful due to technical issues during pH measurements of the collected solutions. For comparison of the studied parameters between the three materials, the Kruskal-Wallis test was used. In acidic media, there was a significant difference between the materials in term of weight change in 10 periods of time (p = 0.000). In particular, after a two month period, Cention N had the highest weight, followed by Vitremer and then by Activa. The difference between Vitremer and Activa became insignificant throughout the rest of the experimental time frame. All the height measurements between the three materials were found to be insignificant except for day 365 (p = 0.048), where both Activa and Cention N were found to be significantly higher than Vitremer. For the Ra comparison, in the first two weeks, particularly day 1, 7 and 14, Cention N had significantly the lowest Ra among the other materials. As the three materials aged in the acidic media (day 180), Vitremer had significantly the highest Ra values. Cention N showed higher Ra values than Activa; nonetheless this difference was not significant. The SEM images showed loss of some particles in all post-experimental images of the materials in acidic media. Vitremer showed the widest cracks with the loss of fillers. In saliva media, there was also loss of particles but to a lesser extent than in acidic media. Yet, the post-experimental image of Activa in saliva resembled the pre-experimental one. Conclusion: Within the limitations of the study, the best material to resist Ra from prolonged acidic attack was Activa followed by Cention N and then Vitremer. Except for Vitremer, no significant changes in the Ra of the other materials were detected when the three materials were immersed in saliva media in the long term. In acidic media Vitremer tended to lose weight and height faster than Cention N and Activa over a year. Cention N is the best material to resist dimensional change. However, in artificial saliva Vitremer gained water rapidly. Activa did not absorb a lot of water and did not reject a lot of water; Activa demonstrated good dimensional stability and this property may be beneficial when compared to the other two materials tested. The clinical significance of the study: All the materials studied were subjected to dimensional and Ra changes following long-term exposure to acidic substances, but the newer materials (Cention N and Activa) seemed to be more dimensionally stable and resistant to Ra changes than the older, well-known material (Vitremer). This may influence a clinician’s choice of restorative material for use in pediatric dentistry.
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Karjiker, Farzana. "The colour stability of various glass ionomer cements." University of the Western Cape, 2019. http://hdl.handle.net/11394/7023.
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>Magister Scientiae - MSc<br>Introduction: Together with bonding to both enamel and dentine, an ideal restorative material would display physical properties similar to that of natural tooth tissue and would not be prone to degradation as a result of the oral environment. This includes changes in colour. Glass ionomer technology has undergone many changes to its original chemistry since it was developed in the early 1970’s. In 1988 resin-modified glass ionomers were introduced and in 2008, nano-ionomers were introduced. As a result of the progression in material sciences and the use of more sophisticated techniques and methods in restorative dentistry, it is possible to accomplish much improved aesthetics and functional durability of a restoration, both anteriorly and posteriorly. However, for as long as aesthetic restorations have been available, and in spite of advances in material structure and performance, one of the greatest challenges facing clinicians still remains that aesthetic restorations have to be replaced relatively frequently as staining and discolouration is a common problem. Aim of the study: The aim of this study was to determine the stainability of four resin-modified glass ionomers and one glass ionomer cement when exposed to a staining broth. Objectives: To record any change in colour before and after exposing the sample with the staining broth using a spectrophotometer, to compare the stainability, to examine the depth of staining using a light microscope and to observe the particle size of the powder and the surface texture using Scanning Electron Microscopy of the four resin- modified glass ionomer cements and one glass ionomer cement. Materials and Methods: Four resin-modified glass ionomers (one nano-ionomer) and one glass ionomer (zinc-reinforced ionomer) were selected. All were shade A2, except for Vitremer™ which was not available in A2. 15 discs of each material were prepared. The discs were 15 mm in diameter and 2 mm in thickness. All the materials were handled and cured according to the manufacturers’ instructions. After curing, only one side of each disc was polished using Sof-Lex™ discs (3M ESPE, USA). The unpolished side of each disc was designated as a matrix finish. The specimens were all immersed in distilled water at 37 °C for one week. They were then immersed in a staining broth for a period of one week and readings were taken after a period of 2 hours, 4 hours, 8 hours, 24 hours and one week. Colour was read on each side of each disc at the indicated intervals with a spectrophotometer. The colour difference was calculated using the CIELAB colour co-ordinates. Sample discs were then sectioned to determine the depth of staining. An additional sample disc of each material was made for observation with the SEM and was therefore not stained. Also, an unmixed sample of each material was prepared for examination with the SEM. Results: In general, for all materials there was an increase in staining when assessed with the colour difference between the baseline colour and the 7 day reading. Ketac™ N100, showed the highest total colour change of 43.84 for the unpolished surface followed by Riva™ which showed the total colour change of 28.55 for the unpolished surface. This was similar to Fuji II LC® which had a total colour change of 28.16 for the unpolished surface. For Vitremer™, the total colour change increased to 18.07 for the unpolished surface. For the unpolished surfaces, ChemFil™ Rock showed the least colour difference from baseline to 7 days (ΔE*ab = 10.45), followed by Vitremer™ (ΔE*ab = 18.07). Both Fuji II LC® and Riva™ Light Cure showed similar colour change from baseline to 7 days for unpolished surfaces (ΔE*ab of 28.16 and 28.55 respectively). Ketac™ N100 showed the highest staining after 7 days in the staining broth with a colour difference of 43.84. For the polished surfaces, the colour change for Fuji II LC® was 25.72 which was similar to Riva™ Light Cure which was 22.44 and Ketac™ N100 which showed a colour change of 22.79 on the polished surface. ChemFil™ Rock showed the least colour change of 17.69 for the polished surface followed by Vitremer™ which showed a colour change of 23.63 for the polished surface. Thus, for both the unpolished and polished surfaces there was a similar staining pattern. Conclusion: In this study it was demonstrated that all products evaluated in this study showed some degree of staining when exposed to a staining broth when evaluated using the ΔE*ab CIELAB colour evaluation. Ketac™ N100 showed the highest colour change compared to the other materials, but the reason for this was not explored. Both Vitremer™ and ChemFil™ Rock showed similar patterns of staining.<br>2020-09-01
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Luo, Yan, and 羅琰. "Assessment of a glass polyalkenoate cement and a polyacid-modified resin composite for the restoration of posterior teeth." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31242121.
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Luo, Yan. "Assessment of a glass polyalkenoate cement and a polyacid-modified resin composite for the restoration of posterior teeth." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22242879.
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Molleri, Roberto Rogerio. "Avaliação in vitro da liberação de fluoretos de duas resinas compostas modificadas por poliacidos e um ionomerico modificado por resina." [s.n.], 2000. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289718.
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Orientador: Luis Roberto Marcondes Martins<br>Dissertaçâo (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-07-27T13:31:40Z (GMT). No. of bitstreams: 1
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Previous issue date: 2000<br>Resumo: Muitos estudos demonstram a liberação de fluoretos dos cimentos de ionômero de vidro modificados por resina e de resinas compostas modificadas por poliácidos. Os efeitos anticariogênicos dos fluoretos têm levado a sua incorporação em um grande número de materiais dentários. O objetivo deste estudo foi quantificar e comparar in vitro a liberação de fluoretos de três materiais restauradores, duas resinas compostas modificadas por poliácidos, e um cimento de ionômero de vidro modificado por resina, nos períodos de 1,4,7,10,15 e 21 dias. Foram confeccionados cinco corpos-de-prova cilíndricos, com medidas de 3 mm de altura por 6 mm de diâmetro utilizando uma matriz metálica pré-fabricada. Os corpos de prova foram mantidos em recipientes com 20 mL de água destilada e deionizada, na temperatura de 37 graus centígrados. A água foi trocada após cada medição. A análise da água foi realizada por um potenciômetro modelo 720 A, marca Orion (Cambridge, MA, USA), acoplado a um eletrodo seletivo para fluoretos, modelo 9609, marca Orion (Cambridge, MA, USA), que determinou a quantidade de fluoretos em partes por milhão. Os dados foram submetidos à análise de variância e teste de Tukey. O estudo demonstrou o mesmo padrão de liberação de fluoretos para os três materiais, pois todos apresentaram maior liberação nas primeiras 24 horas. Após o décimo dia houve estabilização na liberação para todos os materiais. A liberação de fluoretos nas resinas compostas modificadas por poliácidos se manteve menor e constante, se comparada ao cimento de ionômero de vidro modificado por resina, que apresentou valores médios maiores<br>Abstract: Many studies have shown the release of fluorides frem resin-modified glass ionomer and polyacid-modified composite resin. The anticariogenic effects ofthe fluoride ions have called for their use in a great number of dental materiais. The aim of this study was to evaluate and compare, in vitro, the fluoride release of three restorative materiais, the polyacid-modified composite resin and a resin-modified glass ionomer, in 1,4, 7, 10, 15, and 21 days. Five cylindrical samples were made, 3 mm high by 6 mm in diameter by using a pre-built metallic matrix. The samples were stored in 20 mL containers in deionized, distilled water, at 37°C. The water was replaced after each measurement. The water analysis was done by an Orion 720 A model potentiometer (Cambridge, MA, USA), attached to an Orion 9609 model selective electrode for fluorides (Cambridge, MA, USA), which determined the amount of fluorides in parts per milion. The study showed the same fluoride release pattern forthe three materiais, as ali ofthem presented a high release in thefirst24 hours. Afterthetenth day, there was a stabilization in the release for ali materials. The fluorides release in the 'polyacid-modified composite resin remained lower and constant, comparing to the resin-modified ionomer glass cement, which showed higher mean values<br>Mestrado<br>Mestre em Materiais Dentários
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Al-Rowaieh, Saleh Abdulaziz. "Effect of a Desensitizing Agent and an Adhesive System on Microleakage Associated with Cast Restorations Luted with a Resin-modified Glass Ionomer Cement." VCU Scholars Compass, 2002. http://scholarscompass.vcu.edu/etd/4336.
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Purpose: This study evaluated microleakage associated with cast restorations that were luted with a resin-modified glass ionomer cement (RelyX) following obturation of the dentinal tubules with either a desensitizing agent (Gluma Desensitizer) or an adhesive system (Scotchbond Multipurpose Dental Adhesive). The effect of acid etching on the removal of the smear layer and its influence on the extent of microleakage associated with the adhesive system was also evaluated.
Materials and Methods: Extracted mandibular premolars (N = 48) were prepared for complete cast restorations and divided into 4 groups (N = 12). In group A ( control), neither a desensitizing agent or a component of the adhesive system was applied prior to luting. In group B, Gluma Desensitizer was used to obturate the dentinal tubules. In group C, Scotchbond Multipurpose Dental Adhesive System was applied to tooth preparations according to the manufacturer's instructions. Tooth preparations in group D received the same dentin surface treatment as in group C, but no acid etching was performed. Cast restorations in all 4 groups were then luted with the resin-modified glass ionomer luting cement RelyX. All specimens were subjected to thermocycling between 8° and 55°C for 500 cycles in water baths, placed in a solution of 0.5% basic fuchsin dye for 24 hours, and then sectioned twice longitudinally, once mesiodistally and then buccolingually. All specimens were examined at X30 magnification with a stereomicroscope equipped with a digital camera. Photographs of all sections were made and the extent of microleakage along the tooth-cement interface was measured in millimeters using an image analysis software. Microleakage was perceived to have occurred along a segment of the tooth-luting cement interface when dye penetration from that segment into the dentinal tubules was detected. One-way analysis of variance (α = 0.05) was performed to identify differences in mean microleakage among the luting groups, followed by Tukey's Honestly Significant Difference Test for pairwise comparisons.
Results: Large standard deviations were found in all 4 groups. No statistically significant difference was found among the control (0.64 ± 0.50 mm), Gluma Desensitizer (0.42 ± 0.24 mm), and Scotchbond Multipurpose without etching (0.67 ± 0.40 mm) groups. However, a statistically significant difference was found between the Scotchbond Multipurpose with etching (1.51 ± 0.92 mm) group and each of the other groups.
Conclusions: The large standard deviations obtained implied a marked amount of variability in microleakage within each group, which might be the result of the small sample size used. The increase in microleakage when 35% phosphoric acid was used prior to dentin bonding is difficult to explain. Within the limitations of the study, the results suggest that the use of a nonpolymerizing, resin-based (Gluma Desensitizer) material or a photopolymerizing, resin-based (Scotchbond Multipurpose) system without etching had no effect on microleakage under cast restorations luted with the resin-modified glass ionomer luting cement RelyX. The increase in microleakage when etching with 35% phosphoric acid was preformed might be explained by the phenomenon known as nanoleakage, but further investigation is recommended in this area.
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Koutsikas, Peter. "The influence of porosity levels on shear strength and water movement in a resin-modified glass ionomer restorative cement (Fuju II LC Improved) : thesis submitted for the degree of Master of science in Dentistry, Dental School, Faculty of Health Sciences, the University of Adelaide /." Title page, table of contents and abstract only, 2004. http://web4.library.adelaide.edu.au/theses/09DSM/09dsmk882.pdf.
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Cruz, Andréa Ferreira Santos da. "A ação de sucos de frutas sobre materiais restauradores utilizados em lesões cervicais não cariosas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/23/23134/tde-19022014-141541/.
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O presente estudo in vitro analisou o efeito de 3 sucos de fruta com baixo pH (suco de cupuaçu, taperebá e laranja), e saliva artificial (controle) sobre materiais restauradores indicados em lesões cervicais não cariosas: resina composta nanoparticulada (Filtek Z350 XT), cimento de ionômero de vidro resino modificado (Vitremer) e um cimento de ionômero de vidro convencional (Fuji II). Os materiais foram avaliados, quantitativamente, quanto à alteração de: peso, rugosidade superficial e microdureza superficial, e qualitativamente, por microscopia eletrônica de varredura (MEV). Foram confeccionados 144 corpos de prova para cada teste quantitativo (n=12) e 45 para o MEV (n=3), de (8mm de diâmetro x 2mm de altura). Os corpos de prova foram preparados, mantidos em saliva artificial por 24 h à 37º C, receberam acabamento em politriz, e em seguida foram realizadas as leituras iniciais. Durante um período de 10 dias consecutivos, os corpos de prova foram submetidos ao desafio erosivo (nos respectivos sucos de frutas) durante 30 minutos três vezes ao dia, totalizando 90 minutos/dia e mantidos em saliva artificial entre os intervalos. Após o período de ciclagem erosiva, foram realizadas as leituras finais. Os resultados obtidos foram submetidos ao teste t, ANOVA e Tukey. As médias de alteração entre os valores de peso finais e iniciais demonstraram diferença significativa (p<0,01) nos materiais estudados e em todos os sucos estudados, com exceção do Vitremer quando imerso no suco de taperebá (p>0,01). As médias de alteração entre os valores de rugosidade superficial final e inicial demonstraram diferença significativa (p<0,01) para todos os materiais estudados em todos os sucos, exceto a Filtek Z350 XT no grupo controle que não apresentou diferença significativa (p>0,01). A comparação entre os valores de microdureza final e inicial demonstrou diferença significativa (p<0,01) na microdureza dos materiais estudados em todos os meios de imersão, inclusive no grupo controle. De um modo geral o suco de taperebá foi o que provocou a maior alteração na superfície dos materiais restauradores quanto ao peso, rugosidade, microdureza e na microscopia eletrônica de varredura. A resina composta Filtek Z350 XT foi o material restaurador que menos sofreu alterações de superfície. Concluiu-se que os sucos das frutas estudados são capazes de alterar os materiais restauradores, sendo que a resina composta foi o material que sofreu menor alteração.<br>This in vitro study examined the effects of 3 fruit juices with low pH (cupuaçu, taperebá and orange) and artificial saliva (control) upon restorative materials indicated in noncarious cervical lesions: nanoparticle composite resin (Filtek Z350 XT), resin-modified glass ionomer cement (Vitremer) and a glass ionomer cement (Fuji II). The materials were evaluated quantitatively as for alterations in weight, surface roughness and surface microhardness, and qualitatively by scanning electronic microscopy (SEM). 144 specimens were prepared for each quantitative test (n = 12) and 45 for the SEM (n = 3), of (8mm diameter x 2mm height). The specimens were prepared, stored in artificial saliva for 24 hours at 37º C, were finished in a polishing machine, and then the initial readings were performed. During a period of 10 consecutive days, the specimens were subjected to erosive challenge (in the respective juices) for 30 minutes, three times a day, and totaling 90 minutes/day and kept in artificial saliva between intervals. After the erosive cycling period, the final readings were taken. The data were analyzed using t test, ANOVA and Tukey.Test The average alterations between the values of initial and final weight showed significant difference (p < 0.01) in the material studied and all the juices studied, except for Vitremer when immersed in taperebá juice (p > 0.01). The average alterations between the values of initial and final surface roughness showed a significant difference (p < 0.01) for all materials studied in all juices, except for Filtek Z350 XT, in the control group, that showed no significant differences (p > 0.01). The comparison between the values of initial and final microhardness showed a significant difference (p < 0.01) in microhardness of the materials studied in all immersion means, including the control group. In general, taperebá juice was the one that caused the biggest alterations in the surface of restorative materials with respect to weight, roughness, hardness and scanning electronic microscopy. The composite resin Filtek Z350 XT was the restorative material that suffered less surface alterations. It was concluded that the fruit juices studied are capable of altering the restorative materials, and composite resin was the material that has undergone minor changes.
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Menegatti, Giovanna Emann Tavares. "Influência de adesivos autocondicionantes na resistência adesiva de cimentos de ionômero de vidro resinomodificados à dentina." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/23/23134/tde-04082016-152123/.
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A presente pesquisa se propôs a avaliar a influência de cinco tratamentos dentinários na resistência de união à dentina de quatro cimentos de ionômero de vidro modificados por resina (CIVRMs). O ensaio experimental foi realizado in vitro, fazendo uso de 200 incisivos bovinos. Destes, foram obtidos 200 fragmentos de dentina, que foram distribuídos aleatoriamente em 20 grupos (n=10), segundo os fatores de variação que compreendem cinco tratamentos dentinários (Grupo controle, ou seja, sem tratamento; Ácido Poliacrílico a 20%, Clearfil SE Bond; Single Bond Universal e Primer do Vitremer) e quatro cimentos ionoméricos (GC Fuji II LC® CAPSULE; GC Fuji LINING® LC (Paste Pak); Vitrebond® e Vitremer). Após a confecção dos corpos de prova e 24h de armazenamento em estufa à 37oC, foi realizado o teste de microcisalhamento na máquina de ensaios universal (Instron 5942 - Canton, MA, EUA) com velocidade de 1mm/min, seguido da análise do padrão de fratura em microscópio digital. A análise estatística dos 400 resultados obtidos foi feita por meio do teste paramétrico ANOVA para dois fatores de variação (cimento e tratamento) (p<0,05%) e pelo teste auxiliar de Tukey (p<0,05%). Os testes estatísticos demonstraram haver diferença estatística tanto entre os tratamentos, como entre os cimentos e na interação de ambos (p<0,0001). Os sistemas adesivos Clearfil SE (X?=18,26 ± 2,78) e SingleBond (X?=17,28 ± 2,49) promoveram os valores de resistência adesiva mais elevados em comparação aos demais tratamentos, mas sem apresentarem diferença estatística entre si, o que representou um aumento na resistência de união de 121% para o Clearfil SE e 109,2% para o Single Bond Universal em relação ao Grupo Controle. O uso do Ácido Poliacrílico (X?=9,94 ± 3,55) alcançou valores intermediários, correspondendo a um aumento de 20% na resistência adesiva em relação ao Grupo Controle. Esse tratamento se diferenciou estatisticamente dos maiores valores, porém não apresentou diferença frente ao Primer do Vitremer (X?=8,91 ± 2,97). O grupo controle (X?=8,26 ± 4,17) evidenciou os menores valores, se diferenciando estatisticamente dos sistemas adesivos e do Ácido Poliacrílico, mas com resultados que o equiparou ao tratamento com o Primer do Vitremer. Ao se analisar a interação entre cimento e tratamento, todos os cimentos de ionômero de vidro resinomodificados (CIVRMs) testados neste estudo apresentaram seus maiores resultados quando um dos sistemas adesivos foi utilizado como tratamento dentinário, independente de qual sistema adesivo. Com base nesses resultados, pôde-se concluir que os dois sistemas adesivos autocondicionantes foram capazes de melhorar significativamente a resistência adesiva dos CIVRMs.<br>This research aims to evaluate the influence of five dentin pretreatments on microshear bond strength of four resin-modified glass ionomer (RMGI). The experiment was performed in vitro, using 200 bovine incisors. From these, there were obtained 200 dentine fragments that were randomly distributed into 20 groups (n = 10) according to the variation factors comprising five dentin treatment (control group, i.e., no treatment; Polyacrylic Acid 20%; Clearfil SE Bond; Single Bond Universal and Vitremer Primer) and four glass ionomer cements (GC Fuji II LC® CAPSULE; GC Fuji LC LINING® (Paste Pak); Vitrebond® and Vitremer). After preparation of the samples and 24h storage at 37 °C, was performed microshear test in a universal testing machine (Instron 5942 - Canton, MA, USA) with speed of 1mm/min, followed by analysis of the pattern fractures in digital microscope. Statistical analysis of the 400 results was performed by ANOVA nonparametric test for two variation factors (cement and treatment) (p <0.05%) and the post-hoc Tukey (p <0.05%). The tests demonstrated there are statistical difference between treatments, cements and between the interaction of both (p <0.0001). The Clearfil SE (X?=18,26 ± 2,78) and SingleBond (X?=17,28 ± 2,49) promoted the highest bond strength values compared to the other treatments, but showing no statistical difference between them, which represented an increase in bond strength of 121% for Clearfil SE and 109.2% for Single Bond Universal compared to control group. The Polyacrylic Acid (X?=9,94 ± 3,55) has reached intermediate values, corresponding to a 20% increase in adhesive strength compared to control group. This treatment differed significantly from the higher values, but showed no difference compared to Primer Vitremer (X?=8,91 ± 2,97). The control group (X?=8,26 ± 4,17) showed the lowest values, statistically differing from the adhesives and polyacrylic acid, but with results that matched to the treatment with Vitremer Primer. When analyzing the interaction between cement and treatment, all cements tested in this study had higher results when one of the adhesive systems was used as dentin treatment, regardless of which adhesive system. Based on these results, it could be concluded that the two adhesive systems were able to significantly improve the adhesive strength of RMGIs.
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Wei-Ting and 林韋廷. "Addition of yttria-stablized zirconia improves the biocompatibility of resin-modified glass-ionomer cement." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/36152360296511724516.
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碩士<br>中山醫學大學<br>口腔生物暨材料科學研究所<br>98<br>Resin-modified glass-ionomer cements (RM-GICs) containing a basic ion-leachable glass, a water soluble polymeric acid, organic monomer and an initiator system, was considered not as biocompatible as conventional GICs. This study, therefore, was focused on the effects, especially adverse cellular reactions, of yttria-stabilized zirconia (YSZ) addition on resin-modified GIC. YSZ powder was added into Fuji II LC (GC, Japan) in the ratios of 0%, 5%, 10%, and 20%, respectively, molded into columns (2 mm x 4 mm), and light-cured as instructed. There were no statistically significant differences between groups in their compressive strength and diametric tensile strengths, although the group of 20% YSZ addition showed slight reductions. When incubating L929 cells, a fibroblast cell line, with cured 0-3day RMGIC-YSZ eluates, YSZ addition showed a dose dependent improvement of cell vitality, with a 25% increase in 10% YSZ group compared with the control（p＜0.05）. Better cell attachment was observed under electronic microscope in the YSZ group than the control. The production of COX-2 by L929 cells when incubating with RM-GIC eluates, was curbed by the addition of YSZ, also in a dose-dependent pattern, but there were no statistically significant differences between groups in TNFα production . We concluded that the addition of YSZ is capable of improving biocompatibility of GIC without compromising mechanical strength.
Conference papers on the topic "Resin-modified glass ionomer cement (RMGIC)"
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Yudhit, Astrid, Kholidina Harahap, and Sabrina Chairunnisa Nasution. "Effect of Hydroxyapatite From Nile Tilapia (Oreochromisniloticus) Scale on Surface Hardness of Conventional and Resin Modified Glass Ionomer Cement (In Vitro Study)." In 1st Aceh International Dental Meeting (AIDEM 2019), Oral Health International Conference On Art, Nature And Material Science Development 2019. Atlantis Press, 2021. http://dx.doi.org/10.2991/ahsr.k.210201.002.
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