Journal articles: 'Resin-modified glass ionomer. eng'

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Alkhodairi, Asem, Moahmmad Alseweed, Sulaiman Alwashmi, and Ramy Elmoazen. "Clinical Evaluation of the Retention of Resin and Glass Ionomer Sealants Applied as a Part of School-Based Caries Prevention Program." Open Access Macedonian Journal of Medical Sciences 7, no. 23 (December 13, 2019): 4127–30. http://dx.doi.org/10.3889/oamjms.2019.869.

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BACKGROUND: Using of sealant on pits and fissures is likely one of the most generally well-known strategies by the new cavity-prevention systems. AIM: The purpose of this research is to measure the retentiveness of sealants of resin-modified ionomer glass cement (GIC) and resin pits and fissures, on the first permanent molars of special patients as a part of caries prevention program in schools. METHODS: The sample was comprised by 60 molars. Resin-based sealants on one side and glass-ionomer sealant on the contralateral side of the mouth. The molars were examined in three and six months after application for retention with three standards: TR: Totally Retained; PR: Partially Retained; and CL: Completely Lost. RESULTS: by the end of the study 60% of resin sealant was present. While 55% of GIC were retentive after 6 months. CONCLUSION: Resin sealants are more retentive than glass ionomer sealants in school-based carries prevention program.

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Khan, Hannan Humayun, Mafaza Alam, Syed Muzammil Hussain Shah, Saman Mehmood, Ajmal Yousaf, and Pir Jawad Ali Shah. "A COMPARATIVE STUDY OF FREQUENCY OF RETENTION OF FLOWABLE NANOCLUSTER COMPOSITE AND RESIN MODIFIED GLASS IONOMER." PAFMJ 71, no. 1 (February 24, 2021): 299–303. http://dx.doi.org/10.51253/pafmj.v71i1.2598.

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Objective: To investigate and compare the retention rates of Flowable-Nanocluster-Composite and Resinmodified-Glass-Ionomers in non-carious cervical lesions in maxillary molars. Study Design: Prospective cross-sectional comparative study. Place and Duration of Study: Department of Operative Dentistry, Armed Forces Institute of Dentistry,Rawalpindi, from Jan 2017 to Dec 2018. Methodology: Male patients ranging from 30-40 years with moderate non-carious cervical lesions of maxillarypremolars and molars of either quadrant presenting to out-patient department were selected through convenience sampling. These lesions were restored with Flowable-Nanocluster-Composite and Resin-Modified-GlassIonomer. Retention of these two materials over the period of 6 months, 1 year and 2 years was noted. Chi square statistics were used to compare groups. Results: The retention of Flowable-Nanocluster-Composite was 92% in 6 months, 85% in one year and 81% in two years. Whereas, for resin-modified-glass-ionomer restorations, the frequency of retention of the filling material was 97% at 6 months, 93% at one year and 89% at two years period. Out of the total 74 resin-modified-glassionomers restorations, 8 (11%) had dislodged by the end of the second year as compared to 14 (19%) dislodged restorations for Flowable-Nanocluster-Composite. Conclusion: In conclusion, the study reveals that resin modified glass-ionomer has a superior retention rate over the period of two years as compared to Flowable-Nanocluster Composite. A dentist should have an insight into compositions of restorative materials for the longevity of their retention in various lesions.

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Torres-Rivera, Zady J., Juan Augusto Fernández-Tarazona, and Alex Sandro de Souza. "Influence of dentin conditioning with polyacrylic acid on the shear bond strength of a nano-filled resin-modified glass ionomer cement." Journal of Oral Research 9, no. 4 (August 30, 2020): 319–25. http://dx.doi.org/10.17126/joralres.2020.073.

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Purpose: This in vitro study aimed to evaluate the influence of dentin conditioning with polyacrylic acid on the shear bond strength of the nano-filled resin-modified glass ionomer cement Ketac N100 (3MESPE). Material and methods: Eighteen bovine incisors were randomly divided into two groups (n=18): group 1, without dentin surface treatment, and group 2, with dentin surface treated with 10% polyacrylic acid for 15 seconds. In both groups the primer was applied before the application of the nano-filled resin-modified glass ionomer cement (Ketac N100) and light-cured for 20 seconds. After 24 hours, the specimens were submitted to thermocycling for 350 cycles, and the teeth were immersed in distilled water at room temperature. After 24 hours, specimens were tested for shear bond strength at 1mm/minute crosshead speed. The collected data were analyzed using the non-parametric test of Mann Whitney (p<0.05). Results: There was a significant difference in shear bond strength values between the treatment and control groups, the group with dentin conditioning with 10% polyacrylic acid showed higher shear strength values than the group without dentin treatment. Conclusion: Application of 10% polyacrylic acid on dentin increases the shear bond strength values of nano-filled resin-modified glass ionomer cement.

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Zivojinovic, Vesna, and Dejan Markovic. "Clinical efficiency evaluation of minimal dental restorations on occlusal teeth surfaces." Serbian Dental Journal 51, no. 1 (2004): 13–18. http://dx.doi.org/10.2298/sgs0401013z.

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Minimal dental restoration of occlusal surfaces using sealing for prevention, preserve sound tooth structure. The aim of this study was to clinicaly assess the performance of three different techniques in minimal dental restoration. A total of 90 teeth (premolars or molars) with minimal carious lesions were equally divided into three groups and included in this study. In group I and II teeth were restored either with the composite resin and the resin modified glass ionomer cement. Composite sealant (separately applied) was used in both groups. In group III teeth received resin modified glass ionomer cement. These materials were used at the same time as a restorative and a sealant. Modified Cvar and Ryge criteria were used for clinical evaluation after 1, 2, 3, 6 and 12 months. Complete retention at the end of the evaluation period for I, II and III group was 97%, 93% and 93% respectively. No secondary caries was recorded after the evaluation period. From the obtained results it can be concluded that minimal dental restorations presents an efficient and successful technique in the treatment of small occlusal carious lesions.

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Rolim, FG, AF Sá, GWL Silva-Filho, A. de S. Brandim, and GC Vale. "Effect of High-Fluoride Dentifrice on Enamel Erosion Adjacent to Restorations In Vitro." Operative Dentistry 41, no. 2 (March 1, 2016): 157–61. http://dx.doi.org/10.2341/14-292-l.

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SUMMARY Aim: This in vitro study analyzed the antierosive potential of a high-fluoride dentifrice on enamel adjacent to restorations. Methods and Materials: Enamel blocks (6 × 6 × 3 mm) from bovine incisor teeth were restored with three different restorative materials (resin, conventional glass ionomer cement, and resin-modified glass ionomer cement) and treated with dentifrices containing 0, 1100, or 5000 ppm F. After restorative procedures, initial surface Vickers hardness of the blocks were obtained. The specimens were submitted to pH cycles (4 × 90 seconds in soft drink) and treatments for five days. Between the challenges and overnight, the blocks remained in artificial saliva. At the end of the experiment, the final hardness was assessed and the percentage of surface mineral loss (%SML) was calculated. A 3 × 3 factorial design was used to conduct statistical analysis. Data were analyzed by analysis of variance and t-test, with significance level fixed at 5%. Results: High-fluoride dentifrice decreased demineralization caused by erosive challenge regardless of the restorative material used (p<0.001). Likewise, the blocks restored with conventional glass ionomer cement showed lower values of SML irrespective of dentifrice used (p<0.001). Conclusion: Use of a high-fluoride dentifrice on teeth restored with conventional glass ionomer cement offers additional protection against enamel erosion.

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Beriat, Nilufer Celebi, and Dilek Nalbant. "Water Absorption and HEMA Release of Resin-Modified Glass-Ionomers." European Journal of Dentistry 03, no. 04 (October 2009): 267–72. http://dx.doi.org/10.1055/s-0039-1697443.

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ABSTRACTObjectives: The aim of this study was to evaluate the water absorption and the amount of hydroxyethyl metacrylate (HEMA) level released from various resin modified glass ionomer cements.Methods: Advance, Vitremer and Protec-Cem resin modified glass ionomer cements were used to evaluate the HEMA release. Ten specimens were fabricated from each cement in 10 × 1 mm height. Thirty specimens were immersed in glass containers filled with 20 ml deionized water. 1 ml solution was taken from the container at 10 minutes, 1 hour, 24 hour and 7 days intervals from each group and analyzed with high performance liquid chromatography (HPLC) machine and the results are presented in ppm. The data were subjected to Kruskal-Wallis, Mann-Whitney and Wilcoxon tests at a 0.05 significance level.Results: At all time intervals Vitremer showed highest HEMA release (10 min: 54.2 ppm; 1 h: 86.8 ppm; 24 h: 93.4 ppm) (P=0.0001). At the end of 10 minutes and first hour, following Vitremer, HEMA release was highest for Protec-Cem (10 min: 14.8 ppm; 1 h: 23.6 ppm) and then Advance (10 min: 5.5 ppm; 1 h: 18.8 ppm) (P<.05). Water absorption tests were performed according to the specifications of ISO 4049. Water absorption was highest for Vitremer and lowest for the Protec-Cem and the difference among cement groups was significant (P<.005).Conclusions: Vitremer showed the highest HEMA release and water absorption values and Protec-Cem showed the lowest values. HEMA release by time was significant for Advance cement. This release may be relevant both to the risk of adverse pulpal responses in patients and to the risk of allergy in patients and dental personnel. (Eur J Dent 2009;3:267-272)

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Markovic, Dejan, Bojan Petrovic, Tamara Peric, and Duska Blagojevic. "Microleakage, adaptation ability and clinical efficacy of two fluoride releasing fissure sealants." Vojnosanitetski pregled 69, no. 4 (2012): 320–25. http://dx.doi.org/10.2298/vsp1204320m.

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Background/Aim. Retention of fissure sealants and good adaptation to enamel are essential for their success. Fluoride releasing resin-based materials are widely accepted for pit and fissure sealing, but newly designed glass ionomers can serve as a good alternative. The aim of this study was to evaluate microleakage and sealing ability in vitro, and to clinically assess two fluoride releasing fissure sealants. Methods. The sample for experimental study consisted of 20 freshly extracted intact human third molars, divided in two experimental groups according to the sealing material: fluoride releasing resin-based (Heliosel F) and glass ionomer (Fuji Triage) material. Digital images and scanning electron microscope were used to assess microleakage and adaptation ability. Sample for clinical study consisted of 60 children, aged 6-8 years, with high caries risk, divided in two groups according to the sealant material. Fissure sealant was applied to all erupted, caries-free first permanent molars. Sealants were evaluated after 3, 6 and 12 months using modified Ryge criteria for retention, marginal adaptation, colour match, surface smoothness and caries. Results. Microleakage was detected in more than half of the specimen, without significant differences between the two groups (p > 0.05). Both materials exhibited acceptable sealing ability. Complete retention at the end of the observation period was 81.8% for resin-based, and 21.1% for glass-ionomer fissure sealant (p < 0.001). The presence of caries in sealed molars has been detected in one patient in both groups. During the 12-month observation period, Helioseal F demonstrated better retention, marginal adaptation and surface smoothness (p < 0.001). There were no differences between the two materials regarding caries and color match (p > 0.05). Conclusion. Both tested materials demonstrate satisfactory clinical and caries prophylactic characteristics that justify their use in contemporary preventive dentistry.

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Popescu, Sanda Mihaela, Mihaela Jana Ţuculină, Horia Octavian Manolea, Veronica Mercuţ, and Monica Scrieciu. "Randomized Clinical Trial of Adhesive Restorations in Non Carious Cervical Lesions." Key Engineering Materials 695 (May 2016): 3–11. http://dx.doi.org/10.4028/www.scientific.net/kem.695.3.

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AIM: To evaluate the clinical performance of adhesive restorations of resin-modified glass-ionomer cements (RMGIC) compared with of resin composite (RC), and RMGIC liner base laminated with a resin composite in non carious cervical lesions (NCCL).METHODS: The randomized clinical trial included 45 patients (25-65 year-old), with at least two similar sized NCCL on premolars. After sample size calculation, 220 restorations were placed, according to one of the following groups: (G1) Resin-modified glass-ionomer cement (Vitremer); (G2) a resin composite and an adhesive layer (Versaflo); (G3) RMGIC liner base laminated with a resin composite (Vitremer and Versaflo). The restorations were clinically followed every 6 months for up to 24 months using the USPHS modified criteria for clinical evaluation. Survival estimates for restoration longevity were evaluated using the Kaplan-Meier method. Log-rank test (P< 0.05) was used to compare the differences in the success rate according to the type of the restorative material.RESULTS: At the end of 24 months, 172 restorations were evaluated in 37 patients, with a recall rate of 82.22%. The type of restorative material used did not influence the longevity of the restorations. The survival rates for the follow-up were similar regarding the number of restored surfaces and the tooth (upper or lower premolar). Estimated survival rates of the restorations were 100%, 100%, 98,25% and 90,69% at 6, 12, 18 and 24 months of clinical evaluations, respectively. A statistically significant difference was observed between RMGIC and RC or RMGIC laminated with RC for color match, but no other significant difference was observed among the three types of restorations.CONCLUSIONS: The survival rates were similar for the three types of restorations in NCCL. Different types of materials demonstrated acceptable clinical performance in non-carious cervical lesions.

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Koc Vural, U., S. Gökalp, and A. Kiremitci. "Clinical Performance of Composite Restorations with Resin-modified Glass Ionomer Lining in Root Surface Carious Lesions." Operative Dentistry 41, no. 3 (May 1, 2016): 268–75. http://dx.doi.org/10.2341/15-205-c.

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SUMMARY Objective: The purpose of this study was to evaluate the clinical performance of composite restorations in root surface carious lesions with or without resin-modified glass ionomer lining. Methods and Materials: The sample consisted of 25 female and 14 male patients. A maximum of four lesions were included for each patient. After caries removal, the depth, length, and width of the cavity were measured. Lesions in the same patient were randomly divided into two groups, and the dentin surfaces were either lined with resin-modified glass ionomer liner (Glass Liner II) or left as they were. Self-etch adhesive (All Bond SE) was applied and cured for 20 seconds. All cavities were restored with nanohybrid anterior composite resin (Clearfil Majesty Esthetic). Two experienced clinicians evaluated the marginal adaptation (retention) rate, anatomic form, secondary caries, sensitivity, and marginal staining of restorations at the end of the first week and at six, 12, and 18 months posttreatment. The data were statistically analyzed using the Chi-square and two-way repeated measures tests. Results: At the end of 18 months, a total of five lined and three unlined restorations were lost. There was no significant relationship between marginal adaptation and cavity lining at six, 12, and 18 months (p>0.05). Although marginal stainings of restorations were mostly localized, the total number of localized or generalized discolored restorations increased with time (p<0.001). There was a statistically significant relationship between marginal staining and smoking (p>0.05). There was no significant relationship between marginal staining and frequency of toothbrushing at six, 12, and 18 months (p=0.286, p=0.098, and p=0.408, respectively). Conclusion: Within the limitations of this study, both restorative applications were accepted as clinically appropriate.

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Prabhaker, A. R., O. S. Raju, Ameet J. Kurthukoti, and V. Satish. "Evaluation of the Clinical Behavior of Resin Modified Glass Ionomer Cement on Primary Molars: A Comparative One-year Study." Journal of Contemporary Dental Practice 9, no. 2 (2008): 130–37. http://dx.doi.org/10.5005/jcdp-9-2-130.

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Abstract Aim The objectives of the present study were to evaluate and compare the clinical behavior of resin modified glass ionomer cement (RMGIC) on primary molars with conventional and modified cavity preparations. Methods and Materials Forty-two children, 5-9 years of age, having bilateral initial occlusal caries on the mandibular primary second molars were selected for the study. A split mouth design was employed where conventional Class I cavities with a 90° cavosurface angle were prepared randomly on primary second molars on one side and modified cavities with a 1 mm straight bevel along the cavosurface margin on the contra-lateral side. These cavities were restored with RMGIC. The restorations were evaluated during subsequent visits, for a period of one year. Results At the end of one year, 90% of the restorations survived in the conventional cavity group whereas 100% of the restorations survived in the modified cavity group. Conclusion Incorporation of a bevel in Class I cavities increases the survival rate of RMGIC restorations. There was no significant difference in the clinical behavior between the two groups. However, beveling does contribute to long term clinical success of these restorations. Clinical Significance Incorporation of a straight bevel in conventional cavities will improve the retention of RMGIC by increasing the bonding area and enhancing the desired properties of the material. Citation Prabhakar AR, Raju OS, Kurthukoti AJ, Satish V. Evaluation of the Clinical Behavior of Resin Modified Glass Ionomer Cement on Primary Molars: A Comparative One-year Study. J Contemp Dent Pract 2008 February;(9)2:130-137.

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Geurtsen, W. "Biocompatibility of Resin-Modified Filling Materials." Critical Reviews in Oral Biology & Medicine 11, no. 3 (July 2000): 333–55. http://dx.doi.org/10.1177/10454411000110030401.

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Increasing numbers of resin-based dental restorations have been placed over the past decade. During this same period, the public interest in the local and especially systemic adverse effects caused by dental materials has increased significantly It has been found that each resin-based material releases several components into the oral environment. In particular, the comonomer triethyleneglycol di-methacrylate (TEGDMA), and the 'hydrophilic' monomer, 2-hydroxy-ethyl-methacrylate (HEMA), are leached out from various composite resins and 'adhesive' materials (e.g., resin-modified glass-ionomer cements [GICs] and dentin adhesives) in considerable amounts during the first 24 hours after polymerization. Numerous unbound resin components may leach into saliva during the initial phase after polymerization, and later, due to degradation or erosion of the resinous restoration. Those substances may be systemically distributed and could potentially cause adverse systemic effects in patients. In addition, absorption of organic substances from unpolymerized material, through unprotected skin due to manual contact may pose a special risk for dental personnel. This is borne out by the increasing numbers of dental nurses, technicians, and dentists who present with allergic reactions to one or more resin components like HEMA glutaraldehyde ethyleneglycol di-methacrylate (EGDMA), and dibenzoyl peroxide (DPO). However, it must be emphasized that except for conventional composite resins, data reported on the release of substances from resin-based materials are scarce. There is very little reliable information with respect to the biological interactions between resin components and various tissues. Those interactions may be either protective, like absorption to dentin, or detrimental, e.g., inflammatory reactions of soft tissues Microbial effects have also been observed which may contribute indirectly to caries and irritation of the pulp. Therefore, it is critical, both for our patients and for the profession, that the biological effects of resin-based filling materials be clarified in the near future

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Guglielmi, Camila de Almeida Brandão, Ana Flávia Bissoto Calvo, Tamara Kerber Tedesco, Fausto Medeiros Mendes, and Daniela Prócida Raggio. "Contact with Fluoride-Releasing Restorative Materials Can Arrest Simulated Approximal Caries Lesion." Journal of Nanomaterials 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/259753.

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Previous studies have suggested that the presence of white-spot lesion is very probable when adjacent surface is affected by cavitated lesions. This study evaluated the potential of different fluoride-releasing restorative materials in arresting enamel white-spot lesions in approximal surface in contact with them,in vitro(I) andin situ(II). White-spot lesions were formed in 240 primary enamel specimens via pH-cycling. They were put in contact with cylindrical blocks of 6 materials (n=20): composite resin, 2 high-viscous glass ionomer cements (HVGIC), resin-modified GIC, resin-modified nanoionomer, and polyacid-modified resin. In both studies I and II, these settings were designed to simulate the contact point between the restoration and simulated approximal lesion. For study I, they were subjected to a new pH-cycling cariogenic challenge for 7 or 14 days (n=10). For study II, a randomized double-blindin situdesign was conducted in two phases (7/14 days) to promote cariogenic challenge. At the end of both studies, specimens were collected for mineral analysis by cross-sectional microhardness. Higher mineral loss was observed for lesions in contact with resin (p<0.001). HVGICs were the most efficient in preventing mineral loss, whereas other materials presented an intermediate behavior. It is concluded that fluoride-releasing materials can moderately reduce white-spot lesions progression, and HVGIC can arrest enamel lesion in approximal surface in contact with them.

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de Oliveira, Marilia Gerhardt, João Batista Blessmann Weber, Aline Tempel Costa, Francine Konrath, and Berenice Dedavid. "Marginal Adaptation of Root-end Filling Materials: An In vitro Study with Teeth and Replicas." Journal of Contemporary Dental Practice 10, no. 2 (2009): 75–82. http://dx.doi.org/10.5005/jcdp-10-2-75.

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Abstract Aim The purpose of this investigation was to evaluate the marginal adaptation of five root-end filling materials. Methods and Materials Fifty human single-rooted teeth were resected 3 mm from the apex. Root-end cavities were then prepared using an ultrasonic tip and filled with one of the following materials: silver amalgam without zinc, white MTA-Angelus, white Portland cement (PC), Vitremer™, and GC Fuji Ortho™ LC. The apical portion of the roots was then sectioned to obtain two 1 mm thick transversal sections. Epoxy resin replicas of these apical sections were fabricated for an analysis of marginal adaptation. Scanning electron microscopy (SEM) was used to determine gaps in the adaptation of the root-end filling materials at the interface between them and the dentin. The Kruskal-Wallis test and a multiple comparison test were used for statistical data analysis. The Spearman correlation coefficient was used to determine the correlation between the results found for teeth and replicas. Results Materials containing calcium oxide (MTA and PC) showed similar results. Resin modified glass ionomer cements (GICs) presented similar variations in marginal adaptation, but Vitremer™ showed significantly greater marginal adaptation when compared to GC Fuji Ortho™ LC. Conclusion A positive and significant correlation was observed between marginal adaptation values found in the teeth and their replicas. Clinical Significance The use of ionomers as root-end filling materials may improve clinical outcomes in periradicular surgery. Citation Costa AT, Konrath F, Dedavid B, Weber JBB, Oliveira MG. Marginal Adaptation of Root-end Filling Materials: An In vitro Study with Teeth and Replicas. J Contemp Dent Pract 2009 March; (10)2:075-082.

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Pereira, Cecília Luiz, Maximiliano Sérgio Cenci, and Flávio Fernando Demarco. "Sealing ability of MTA, Super EBA, Vitremer and amalgam as root-end filling materials." Brazilian Oral Research 18, no. 4 (December 2004): 317–21. http://dx.doi.org/10.1590/s1806-83242004000400008.

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This study evaluated the root-end sealing ability of mineral trioxide aggregate (MTA Angelus), reinforced zinc oxide-eugenol cement (Super EBA), resin-modified glass ionomer (Vitremer) and zinc-free amalgam (GS-80) (control). The root canals of eighty human lower molars were accessed, cleansed, shaped and obturated. Apexes were resected and cavities were prepared. Teeth were divided into 4 groups of 40 cavities, root-end filled with the materials, and immersed in methylene blue for 72 h at 37°C. Roots were then sectioned transversally at each millimeter and evaluated under magnification, observing the dye penetration in each section. Data were evaluated using Kruskal-Wallis test at a 5% level of significance, showing the differences among all materials (p < 0.001). The crescent order of microleakage was MTA < Vitremer < Super EBA < amalgam. Higher leakage levels were observed in the first millimeter sections of amalgam, Vitremer and MTA, when compared with the third millimeter section (p < 0.05).

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Gigovski, Nikola, Vesna Korunoska Stevkovska, Aneta Mijoska, Sanja Pancevska, Emilija Valjakova Bajraktarova, and Ana Gigovska Arsova. "Time-depending solubility of different fixed prosthetic permanent luting cements." Macedonian Pharmaceutical Bulletin 63, no. 01 (2017): 35–39. http://dx.doi.org/10.33320/maced.pharm.bull.2017.63.01.003.

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The solubility of dental cements is important property due to their prolonged exposure to oral fluids. Тhe recommended standard is 0.2% mass loss for 24 hours. The aim of the study is to measure and compare the values of the solubility in different types of permanent cements as a function of time of exposure to the solvent. Four types of cements were selected: zinc phosphate (ZP), glass-ionomer (GI), resin-modified glass-ionomer (RG) and polycarboxylate (PC) cement. Totally 120 samples, equally divided in 4 series, were fabricated according to the experimental method recommended for in vitro laboratory measuring of the mass loss of the cement due to solubility. Distilled water was used as a solvent. The measuring of every sample weight was performed before and after immersing in solvent for 1, 7, 14 and 21 days and mass loss was calculated as a percent of initial weight of the sample. According to the results, the mass loss of selected cements after immersion in distilled water for the initial 24hours period was 0.28% for ZP cement, 0.32% for RG, 0.51% for PC and 0.57% for GI cement. After this period, the mass loss decreased and was minimal at the end of the third week. The precise evaluation of this basic characteristic is necessary for predicting clinical behavior of the permanent cement and the exact cement selection in every single case. Keywords: permanent cementation, dental cement, solubility, dissolution

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Croll, Theodore P. "RESIN-MODIFIED GLASS IONOMER." Journal of the American Dental Association 144, no. 11 (November 2013): 1224–27. http://dx.doi.org/10.14219/jada.archive.2013.0047.

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Thompson, Van P. "RESIN-MODIFIED GLASS IONOMER: Authors' response." Journal of the American Dental Association 144, no. 11 (November 2013): 1227–28. http://dx.doi.org/10.14219/jada.archive.2013.0048.

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Na, Eui Ri, Jong Wook Moon, and Young Joon Kim. "Osteogenic Response of Osteoblastic Cells to Root-End Filling Materials." Materials Science Forum 926 (July 2018): 95–100. http://dx.doi.org/10.4028/www.scientific.net/msf.926.95.

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Perforations can occur during endodontic treatment, post placement and removal, and operative procedures. These defects have been treated with a variety of different materials such as resin ionomer, glass ionomer cement and intermediate restorative material. However, the osteogenic response to these substances using osteoblasts have been rarely studied. Thus, the aim of the present study is to evaluate the osteogenic response to resin ionomer (Geristore) and mineral trioxide aggregate (MTA). The surface roughness was significantly higher in the MTA than in the resin ionomer (p<0.05). After 72 hours of incubation mouse osteoblasts attached and spread well over the surfaces of resin ionomer and MTA. As a result from MTT assay, the number of cells gradually increased as the cell incubation time increased. In particular, control group showed higher cell proliferation than the other two groups on days 3 and 5. Resin ionomer showed more active early cell proliferation than MTA (p<0.05). The alkaline phosphatase (ALP) activity was significantly higher in the MTA surface than in the resin ionomer and glass coverslip (p<0.05). Resin ionomer was active in early cell proliferation and adhesion. Resin ionomer may be more suitable for cervical perforation or for perforation of adjacent to the gingiva requiring rapid wound closure. Also, MTA has a rough surface and low initial cell adhesion but because of its superior osteogenic response, it may be appropriate for the area close to the apical region, where the perforation site is wide and the bone tissue regeneration is necessary.

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Øilo, G. "Biodegradation of Dental Composites/ Glass-Ionomer Cements." Advances in Dental Research 6, no. 1 (September 1992): 50–54. http://dx.doi.org/10.1177/08959374920060011701.

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Studies of the degradation processes, types of tests, and measurements and analyses of substances leaching out from resin-based composite materials and glass-ionomer cements are reviewed. For both types of materials, the initial release rate rapidly decreases to a low, but nearly constant, level. For composites, various types of degradation processes have been demonstrated. Elements from filler particles and degradation products from the resin ( e.g., formaldehyde) leak out. Many substances are not properly identified. It is, however, difficult for in vitro and in vivo degradation to be compared. For glass ionomers, a total disintegration of a surface layer is observed, together with a slow release of elements from the bulk. Of the elements released, fluoride is the most interesting. Marked differences have been shown between in vitro and in vivo solubility tests.

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Zakaria, Manzuma Akhter, Mozammal Hossain, and Ali Asgor Moral. "Comparative efficacy of nanofilled and microfilled resin-modified glass ionomer as pits and fissure sealant in permanent molar teeth." Bangabandhu Sheikh Mujib Medical University Journal 10, no. 2 (May 22, 2017): 53. http://dx.doi.org/10.3329/bsmmuj.v10i2.31877.

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The purpose of the present study was to compare the efficacy of nanofilled and microfilled resin- modified glass ionomer as pits and fissure sealants in permanent molar teeth. Ninety six teeth having fissure at the occlusal surface were randomly divided into two groups: Group I: Treated by nanofilled resin-modified glass ionomer sealant and Group II: Treated by microfilled resin- modified glass ionomer sealants. Clinical assessment was performed by modified Ryge´s criteria by means of retention, color match, marginal adaptation at 3, 6, and 12 months follow-up visit. Chi-square test was used for testing differences between the two groups; a value of p<0.05 was considered as statistically significant. The results revealed that at 12 months observation period, nanofilled resin-modified glass ionomer sealant showed better retention, color stability and marginal adaptation than that of microfilled resin-modified glass ionomer sealants. Furthermore, the differences between two groups in respect to marginal adaptation and color match were statistically significant (p<0.05). It can be concluded that nanofilled resin-modified glass ionomer sealant could be a better alternative to microfilled resin- modified glass ionomer sealant.

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Berzins, D. W., S. Abey, M. C. Costache, C. A. Wilkie, and H. W. Roberts. "Resin-modified Glass-ionomer Setting Reaction Competition." Journal of Dental Research 89, no. 1 (December 4, 2009): 82–86. http://dx.doi.org/10.1177/0022034509355919.

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Resin-modified glass ionomers (RMGI) set by at least 2 mechanisms dependent upon reactant diffusion prior to gelation. Each reaction’s kinetics and setting mechanism may rely on and/or compete with the other. In this study, we investigated RMGI setting reaction interactions using differential scanning calorimetry (DSC) by varying light-cure initiation times. A RMGI was analyzed with isothermal and dynamic temperature scan DSC with light-curing occurring immediately, or at 5 or 10 minutes after mixing as well as without light-activation. Results show that as time allowed for the acid-base reaction increased, the light-activation polymerization exotherm decreased. Conversely, analysis of DSC data suggests that earlier light-activation may limit the acid-base reaction and result in a different structured material. During early RMGI development, acid-base and light-polymerization reactions compete with and inhibit one another.

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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 (April 27, 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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KARAOGLANOGLU, Serpil, Nilgün AKGÜL, Hatice Nur ÖZDABAK, and Hayati Murat AKGÜL. "Effectiveness of surface protection for glass-ionomer, resin-modified glass-ionomer and polyacid-modified composite resins." Dental Materials Journal 28, no. 1 (2009): 96–101. http://dx.doi.org/10.4012/dmj.28.96.

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Sidhu, Sharanbir K. "Clinical evaluations of resin-modified glass-ionomer restorations." Dental Materials 26, no. 1 (January 2010): 7–12. http://dx.doi.org/10.1016/j.dental.2009.08.015.

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Khatun, Dilruba, Mozammal Hossain, Md Joynal Abdin, Md Abdul Hannan Sheikh, and Md Shamsul Alam. "A comparative clinical study on efficacy of nanofilled resin-modified and conventional glass ionomer pit and fissure sealant in molar tooth." Bangabandhu Sheikh Mujib Medical University Journal 11, no. 4 (December 25, 2018): 278–81. http://dx.doi.org/10.3329/bsmmuj.v11i4.38447.

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The present study compared the clinical performance of nanoparticulated resin modified glass ionomer and conventional glass ionomer pit and fissure sealant on permanent molars. Fifty patient having bilateral occlusal grooves in pits and fissures of the occlusal surface were included for this study where 50 teeth were treated with nanopaticulated resin modified and the remaining 50 teeth were subjected to conventional glass ionomer sealants. The color match, retention and marginal adaptation were assessed at 3, 6 and 12 months and statistical analysis was performed by Chi-square test to assess the difference between the two sealants; a values of <0.05 was considered as statistically significant. The results showed that although there were no significant differences between two sealants at baseline and 3 months observation period but nanoparticulated resin modified glass ionomer sealants showed better clinical performance than that of conventional glass ionomer sealants at 12 months and the differences between two sealants were statistically significant (p<0.05). It can be concluded that naqnoparticulated resin modified glass ionomer sealant exhibited better color stability, more retention, and better marginal adaptation than those of conventional glass ionomer sealants at 12 months observation period.

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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 (December 5, 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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Cabral, Maria Fernanda Costa, Roberto Luiz de Menezes Martinho, Manoel Valcácio Guedes-Neto, Maria Augusta Bessa Rebelo, Danielson Guedes Pontes, and Flávia Cohen-Carneiro. "Do conventional glass ionomer cements release more fluoride than resin-modified glass ionomer cements?" Restorative Dentistry & Endodontics 40, no. 3 (2015): 209. http://dx.doi.org/10.5395/rde.2015.40.3.209.

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Moberg, Matthew, John Brewster, John Nicholson, and Howard Roberts. "Physical property investigation of contemporary glass ionomer and resin-modified glass ionomer restorative materials." Clinical Oral Investigations 23, no. 3 (July 11, 2018): 1295–308. http://dx.doi.org/10.1007/s00784-018-2554-3.

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Malek, Shirin, Mozammal Hossain, Md Abdul Gafur, Md Shahjalal Rana, and Md Ali Asgor Moral. "Comparative study of resin sealant and resin modified glass ionomer as pit and fissure sealant." Bangabandhu Sheikh Mujib Medical University Journal 10, no. 1 (February 23, 2017): 21. http://dx.doi.org/10.3329/bsmmuj.v10i1.31366.

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The purpose of the present study was to compare the marginal integrity of resin modified glass ionomer cement with that of resin sealant, in vitro. Forty artificial pit and fissure cavities were prepared in occlusal surface of extracted premolar teeth by using ¼ round carbide bur. Cavities were condensed with artificial organic debris followed by cleaning with prophylaxis pumice brush and paste and then separated into two treatment groups. In Group A, 15 fissure cavities were sealed by resin sealant and in Group B, 15 fissure cavities were sealed by resin modified glass ionomer sealant. These specimens were subjected to thermo-cycling followed by dye penetration test. The remaining 5 cavities from each group were analyzed for debris score by the SEM. The results of the microleakage test showed that the efficacy of preventing microleakage of samples sealed by resin modified glass ionomer sealant was higher than the samples sealed by resin sealant. However, no significant differences were found. It can be concluded that use of resin modified glass ionomer sealant is a good alternative for sealing pits and fissures.

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Millett, D. T. "Resin-modified glass ionomer, modified composite or conventional glass ionomer for band cementation?--an in vitro evaluation." European Journal of Orthodontics 25, no. 6 (December 1, 2003): 609–14. http://dx.doi.org/10.1093/ejo/25.6.609.

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Bajwa, Navroop Kaur, and Anuradha Pathak. "Change in Surface Roughness of Esthetic Restorative Materials after Exposure to Different Immersion Regimes in a Cola Drink." ISRN Dentistry 2014 (March 23, 2014): 1–6. http://dx.doi.org/10.1155/2014/353926.

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Context. An in vitro study carried out to evaluate and compare the effect of Cola drink on surface roughness of esthetic restorative materials. Purpose. To compare the effect of different immersion regimes in a Cola drink on surface roughness of esthetic restorative materials. Method. Two hundred samples were grouped into 4 equal groups of 50 samples each: Group I: conventional glass ionomer, Group II: resin modified glass ionomer, Group III: polyacid-modified resin composite, Group IV: Composite resin. Each group was further subdivided into 5 subgroups of 10 samples each. Subgroup A (Control Subgroup). Samples were kept immersed in artificial saliva. Subgroup B. Samples were immersed in Cola drink once a day. Subgroup C. Samples were immersed in Cola drink, 3 times a day. Subgroup D. Samples were immersed in Cola drink 5 times a day. Subgroup E. Samples were immersed in Cola drink 10 times a day. Each immersion lasted 5 minutes. The immersion protocol was repeated for 7 days. Results. Maximum surface roughness was seen in Group I conventional glass ionomer cement, followed by Group II resin modified glass ionomer, Group III polyacid modified resin composite, and Group IV composite resin samples. Conclusion. Resistance to change in surface roughness is more in resin based restorative materials as compared to glass ionomer based materials.

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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 (December 1, 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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Pereira, P. N. R., T. Yamada, S. Inokoshi, M. F. Burrow, H. Sano, and J. Tagami. "Adhesion of resin-modified glass ionomer cements using resin bonding systems." Journal of Dentistry 26, no. 5-6 (July 1998): 479–85. http://dx.doi.org/10.1016/s0300-5712(97)00059-6.

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PEDRINI, Denise, Elerson GAETTI-JARDIM JÚNIOR, and Andréia Coelho de VASCONCELOS. "Retention of oral microorganisms on conventional and resin-modified glass-ionomer cements." Pesquisa Odontológica Brasileira 15, no. 3 (September 2001): 196–200. http://dx.doi.org/10.1590/s1517-74912001000300004.

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Secondary caries are a worldwide public and socioeconomic problem. The placement of restorations can lead to the development of environmental conditions favorable to microbial colonization, especially on the tooth/restoration interface, which is a predisposing factor for secondary caries. The aim of this study was to evaluate microbial retention on conventional (Chelon-Fil and Vidrion R) and resin-modified (Vitremer and Fuji II LC) glass-ionomer cements, in situ, using a hybrid composite resin (Z100) as a control. Twelve volunteers wore Hawley appliances with specimens made of all tested filling materials for 7 days. The specimens were then removed from the appliances and transferred to tubes containing 2.0 ml of Ringer-PRAS. Microorganisms from the samples were inoculated onto blood agar and Mitis Salivarius Bacitracin agar and incubated under anaerobiosis (90% N2, 10% CO2), at 37°C, for 10 and 2 days, respectively. The resin-modified glass-ionomer cements and the composite resin retained the same levels of microorganisms on their surfaces. The resin-modified glass-ionomers retained less mutans streptococci than the composite resin and conventional glass-ionomer cements. The conventional glass-ionomer cements retained less mutans streptococci than the composite resin, but that difference was not statistically significant.

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Tay, F. R., S. K. Sidhu, T. F. Watson, and D. H. Pashley. "Water-dependent Interfacial Transition Zone in Resin-modified Glass-ionomer Cement/Dentin Interfaces." Journal of Dental Research 83, no. 8 (August 2004): 644–49. http://dx.doi.org/10.1177/154405910408300812.

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The function of the interfacial transition zone (absorption layer) in resin-modified glass-ionomer cements bonded to deep dentin remains obscure. This study tested the hypotheses that the absorption layer is formed only in the presence of water derived from hydrated dentin and allows for better bonding of resin-modified glass-ionomer cements to dentin. Ten percent polyacrylic acid-conditioned, hydrated, and dehydrated deep dentin specimens were bonded with 2 resin-modified glass-ionomer cements and sealed with resins to prevent environmental water gain or loss. A non-particulate absorption layer was identified over hydrated dentin only, and was clearly discernible from the hybrid layer when bonded interfaces were examined with transmission electron microscopy. This layer was relatively more resistant to dehydration stresses, and remained intact over the dentin surface after tensile testing. The absorption layer mediates better bonding of resin-modified glass-ionomer cements to deep dentin, and functions as a stress-relieving layer to reduce stresses induced by desiccation and shrinkage.

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Kanchanavasita, Widchaya, H. M. Anstice, and Gavin J. Pearson. "Water sorption characteristics of resin-modified glass-ionomer cements." Biomaterials 18, no. 4 (January 1997): 343–49. http://dx.doi.org/10.1016/s0142-9612(96)00124-x.

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Baysal, A., and T. Uysal. "Resin-modified glass ionomer cements for bonding orthodontic retainers." European Journal of Orthodontics 32, no. 3 (September 30, 2009): 254–58. http://dx.doi.org/10.1093/ejo/cjp066.

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Forsten, Lennart. "Resin-modified glass ionomer cements: Fluoride release and uptake." Acta Odontologica Scandinavica 53, no. 4 (January 1995): 222–25. http://dx.doi.org/10.3109/00016359509005976.

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Percq, Audrey, Denis Dubois, and J. W. Nicholson. "Water Transport in Resin-modified Glass-ionomer Dental Cement." Journal of Biomaterials Applications 23, no. 3 (May 8, 2008): 263–73. http://dx.doi.org/10.1177/0885328208088863.

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Yelamanchili, A., and B. W. Darvell. "Network competition in a resin-modified glass-ionomer cement." Dental Materials 24, no. 8 (August 2008): 1065–69. http://dx.doi.org/10.1016/j.dental.2007.12.005.

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Maneenut, Chaiwat, Rangsima Sakoolnamarka, and Martin J. Tyas. "The repair potential of resin-modified glass-ionomer cements." Dental Materials 26, no. 7 (July 2010): 659–65. http://dx.doi.org/10.1016/j.dental.2010.03.009.

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Tanaka, Carina B., Frances Ershad, Ayman Ellakwa, and Jamie J. Kruzic. "Fiber reinforcement of a resin modified glass ionomer cement." Dental Materials 36, no. 12 (December 2020): 1516–23. http://dx.doi.org/10.1016/j.dental.2020.09.003.

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Woolford, M. J., and R. G. Chadwick. "Surface pH of resin-modified glass polyalkenoate (ionomer) cements." Journal of Dentistry 20, no. 6 (December 1992): 359–64. http://dx.doi.org/10.1016/0300-5712(92)90025-8.

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Yu, H., Q. Li, T. Attin, and Y. Wang. "Protective Effect of Resin Coating on the Microleakage of Class V Restorations Following Treatment with Carbamide Peroxide In Vitro." Operative Dentistry 35, no. 6 (November 1, 2010): 634–40. http://dx.doi.org/10.2341/10-039-lr.

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Clinical Relevance Carbamide peroxide treatment increased the microleakage of Class V conventional glass-ionomer cement and resin modified glass-ionomer cement restorations. The resin coating is an effective method to avoid bleaching-induced microleakage without affecting the bleaching outcome.

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Moosavi, Horieh, Marjaneh Ghavamnasiri, and Vahideh Manari. "Effect of Postoperative Bleaching on Marginal Leakage of Resin Composite and Resin-Modified Glass Ionomer Restorations at Different Delayed Periods of Exposure to Carbamide Peroxide." Journal of Contemporary Dental Practice 10, no. 6 (2009): 1–8. http://dx.doi.org/10.5005/jcdp-10-6-1.

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Abstract Aim To evaluate the effect of dental bleaching with carbamide peroxide at different exposure times on the microleakage of resin composite and resin-modified glass ionomer restorations after placement in extracted human teeth. Methods and Materials 120 Class V cavity preparations were placed at the cementoenamel junction (CEJ) of human teeth. Half of the cavities were restored with Filtek P60 resin composite(C) and the other half were restored with Fuji II LC resin-modified glass ionomer (G). Each group was randomly divided into four subgroups (n=15). Groups C1 and G1 were not bleached and stored in artificial saliva at 37°C to serve as control groups, while in Groups C2 and G2, C3 and G3, and C4 and G4 specimens were exposed to a 15% carbamide peroxide gel for one day, one week, and two weeks, respectively, following the placement of restorations. Microleakage was assessed using the dye penetration method. Data were analyzed using the Kruskal-Wallis and Wilcoxon tests (p=0.05). Results The Kruskal-Wallis test showed no significant difference among all groups of composite or glass ionomer restorations with either enamel or dentinal margins with regard to microleakage (p>0.05). The Wilcoxon test revealed more marginal leakage in the enamel/ glass ionomer margins than the enamel/ composite margins (p<0.05). In comparisons within each group, the Wilcoxon test showed there was more microleakage in dentinal margins of composite restorations than in the enamel margins in the test groups (p<0.05). The dentinal margins of the glass ionomer in control groups showed more leakage than the enamel margins, but after the bleaching procedure all experimental groups showed statistically similar microleakage in both the enamel and dentinal margins (p>0.05). Conclusions Postoperative bleaching with carbamide peroxide could increase microleakage in the dentinal margins of composite and the enamel margins of resin-modified glass ionomer restorations. Clinical Significance Rebonding of resin composite restorations should be considered following bleaching with 15% carbamide peroxide in order to reseal the margins. Resin-modified glass ionomer is not suitable as a filling material before bleaching because of its susceptibility to increased microleakage. Citation Moosavi H, Ghavamnasiri M, Manari V. Effect of Postoperative Bleaching on Marginal Leakage of Resin Composite and Resin-Modified Glass Ionomer Restorations at Different Delayed Periods of Exposure to Carbamide Peroxide. J Contemp Dent Pract [Internet]. 2009 Nov; 10(6):009-016. Available from: http://www.thejcdp. com/journal/view/volume10-issue6-moosavi.

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Moosavi, Horieh, Marjaneh Ghavamnasiri, and Vahideh Manari. "Effect of Postoperative Bleaching on Marginal Leakage of Resin Composite and Resin-Modified Glass Ionomer Restorations at Different Delayed Periods of Exposure to Carbamide Peroxide." Journal of Contemporary Dental Practice 10, no. 6 (2009): 9–16. http://dx.doi.org/10.5005/jcdp-10-6-9.

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Abstract Aim To evaluate the effect of dental bleaching with carbamide peroxide at different exposure times on the microleakage of resin composite and resin-modified glass ionomer restorations after placement in extracted human teeth. Methods and Materials 120 Class V cavity preparations were placed at the cementoenamel junction (CEJ) of human teeth. Half of the cavities were restored with Filtek P60 resin composite(C) and the other half were restored with Fuji II LC resin-modified glass ionomer (G). Each group was randomly divided into four subgroups (n=15). Groups C1 and G1 were not bleached and stored in artificial saliva at 37°C to serve as control groups, while in Groups C2 and G2, C3 and G3, and C4 and G4 specimens were exposed to a 15% carbamide peroxide gel for one day, one week, and two weeks, respectively, following the placement of restorations. Microleakage was assessed using the dye penetration method. Data were analyzed using the Kruskal-Wallis and Wilcoxon tests (p=0.05). Results The Kruskal-Wallis test showed no significant difference among all groups of composite or glass ionomer restorations with either enamel or dentinal margins with regard to microleakage (p>0.05). The Wilcoxon test revealed more marginal leakage in the enamel/ glass ionomer margins than the enamel/ composite margins (p<0.05). In comparisons within each group, the Wilcoxon test showed there was more microleakage in dentinal margins of composite restorations than in the enamel margins in the test groups (p<0.05). The dentinal margins of the glass ionomer in control groups showed more leakage than the enamel margins, but after the bleaching procedure all experimental groups showed statistically similar microleakage in both the enamel and dentinal margins (p>0.05). Conclusions Postoperative bleaching with carbamide peroxide could increase microleakage in the dentinal margins of composite and the enamel margins of resin-modified glass ionomer restorations. Clinical Significance Rebonding of resin composite restorations should be considered following bleaching with 15% carbamide peroxide in order to reseal the margins. Resin-modified glass ionomer is not suitable as a filling material before bleaching because of its susceptibility to increased microleakage. Citation Moosavi H, Ghavamnasiri M, Manari V. Effect of Postoperative Bleaching on Marginal Leakage of Resin Composite and Resin-Modified Glass Ionomer Restorations at Different Delayed Periods of Exposure to Carbamide Peroxide. J Contemp Dent Pract [Internet]. 2009 Nov; 10(6):009-016. Available from: http://www.thejcdp. com/journal/view/volume10-issue6-moosavi.

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Subramaniam, Priya, Sapna Kondae, and Kamal Kishore Gupta. "Retentive Strength of Luting Cements for Stainless Steel Crowns: An in vitro Study." Journal of Clinical Pediatric Dentistry 34, no. 4 (July 1, 2010): 309–12. http://dx.doi.org/10.17796/jcpd.34.4.p5h1068v41ggt450.

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The present study evaluated and compared the retentive strength of three luting cements. A total of forty five freshly extracted human primary molars were used in this study. The teeth were prepared to receive stainless steel crowns. They were then randomly divided into three groups, of fifteen teeth each, so as to receive the three different luting cements: conventional glass ionomer, resin modified glass ionomer and adhesive resin. The teeth were then stored in artificial saliva for twenty four hours. The retentive strength of the crowns was determined by using a specially designed Instron Universal Testing Machine (Model 1011). The data was statistically analyzed using ANOVA to evaluate retentive strength for each cement and Tukey test for pair wise comparison. It was concluded that retentive strength of adhesive resin cement and resin modified glass ionomer cement was significantly higher than that of the conventional glass ionomer cement.

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Ayudia, Thesi Kurnia, Kuswardani Susari Putri, and Ivony Fitria. "PERBANDINGAN KEBOCORAN MIKRO PADA RESTORASI RESIN KOMPOSIT MIKROFILLER DENGAN RESIN-MODIFIED GLASS IONOMER CEMENT (RMGIC) PADA KAVITAS KLAS V GIGI ANTERIOR." Andalas Dental Journal 3, no. 2 (December 3, 2015): 83–91. http://dx.doi.org/10.25077/adj.v3i2.54.

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Microleakage defined as the clinically undetectable passage of bacteria, fluids, molecules or ions between a cavity wall and the restorative material. Microleakage tends to occur in Class V cavities. It is caused by marginal adaptation which is more difficult in class V cavities. Microfiller composite resin is developed and indicated for areas that not require a large pressure. As the development of dental materials, it has been developed a composite resin base material that is known as resin-modified glass ionomer cement. This material has purposed to reduce the limitation of conventional glass ionomer cement and take the advantage of the composite resin material. The aim of this study was to evaluate microleakage difference of microfiler composite resin restoration with resin-modified glass ionomer cement restorations in class V anterior teeth cavities. The methode of this study used experimental laboratory through in vitro process . Thirty two class V cavities were prepared on labial surfaces of extracted human anterior teeth. Samples were divided into two groups. Group I included sixteen samples that have had restorated with microfiller composite. Group II included sixteen samples that have had restorated with resin-modified glass ionomer cement. The samples were immersed into aquabides solution for 24 hours. After that, the samples were immersed into 1% methylene blue solution for 24 hours. All samples sectioned longitudinally and analyzed for microleakage as dye penetration using a stereomicroscope. Student t-test were used for statistical analysis. The resulting data showed no significantly difference between two groups. Key Word : Microleakage, microfiller composite resin, resin-modified glass ionomer cement (RMGIC), class V cavities.

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Tsuge, Takuma. "Radiopacity of conventional, resin-modified glass ionomer, and resin-based luting materials." Journal of Oral Science 51, no. 2 (2009): 223–30. http://dx.doi.org/10.2334/josnusd.51.223.

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Mousavinasab, Sayed Mostafa, Maryam Khoroushi, Fateme Keshani, and Shirin Hashemi. "Flexural Strength and Morphological Characteristics of Resin-modified Glass-ionomer Containing Bioactive Glass." Journal of Contemporary Dental Practice 12, no. 1 (2011): 41–46. http://dx.doi.org/10.5005/jp-journals-10024-1008.

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ABSTRACT Introduction Recent advances in dental materials have led to the production of smart materials. Recently, addition of bioactive materials to glass-ionomer cements has resulted in new capabilities beyond the beneficial effects of fluoride release. This in vitro study compared the flexural strengths (FS) of a resin-modified glass-ionomer containing bioactive glass (RMGIBAG) with that of a commonly used resin-modified glass-ionomer (RMGI). Methods and materials A total of forty RMGI and RMGI-BAG bars (20 × 4 × 4 mm) were prepared in stainless steel molds. Each of the RMGI and RMGI-BAG bars was set for FS test. FS values of the specimens were measured using three-point bending test at a crosshead speed of 0.5 mm/min. The surface changes and the amounts of elements on the materials’ surfaces were also evaluated by SEM/EDS analyses. Data were analyzed using SPSS 11.5 and t-test (a = 0.05). Results The means ± SD in the study groups were 61.46 ± 22.52 and 39.90 ± 9.11 MPa respectively. There were significant differences between FS of the two study groups (p = 0.003). Conclusion While adding 20 wt% of BAG to the RMGI powder evaluated in this study decreases FS of the material significantly, the mean value of FS is in the acceptable range of the reported FS values for conventional GIs and RMGIs that are commercially available for clinical use. Clinical significance While flexural strength of RMGI decreases subsequent to addition of bioactive glass, it is still clinically acceptable considering the flexural strength values reported for clinically used GIs and RMGIs. Further studies are recommended. How to cite this article Mousavinasab SM, Khoroushi M, Keshani F, Hashemi S. Flexural Strength and Morphological Characteristics of Resin-modified Glass-ionomer Containing Bioactive Glass. J Contemp Dent Pract 2011;12(1):41-46.

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Journal articles on the topic 'Resin-modified glass ionomer. eng'

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