To see the other types of publications on this topic, follow the link: Dental glass ionomer cements.
Journal articles on the topic 'Dental glass ionomer cements'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Dental glass ionomer cements.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Earar, Kamel, Anca Porumb, Ruxandra Matei, Simona Cavalu, Ramona Amina Popovici, Sergiu Focsaneanu, Nazem Dawod, Adriana Saceleanu, and Liana Todor. "The Glass Ionomer Cement Reinforced with Silver - Premise in Choosing the Teeth Proposed for Orthodontic Purpose Extraction." Revista de Chimie 70, no. 1 (February 15, 2019): 324–26. http://dx.doi.org/10.37358/rc.19.1.6909.
Full textAbstract:
The glass ionomer cements present very good bio compatibility especially due to the presence of Fluor in their composition. The reactivity from the dental pulp to the ionomer cements is also favorable, even in the case of the profound cavities. The metallic ionomer cements are obturation materials that tend to replace the amalgams and were created by adding of metallic alloys to the glass powder for the purpose of improving the mechanic properties. The resistance to abrasion of the glass ionomer cements reinforced with Ag is increased compared to the ionomer cements, being close to that of the composite resins with micro filling, but inferior to the amalgams or composites for the posterior area. All these properties of the metallic glass ionomers recommend their utilization in accomplishing the definitive obturations of the permanent teeth from the lateral area, where the physiognomic aspect is not on the first place and where it is necessary a material with fast grip. The physical-chemical qualities and the bio compatibility of the glass ionomers reinforced with particles of silver was our premise in their utilization for the obturation of the molars of six years in children.
2
Souza, Júlio C. M., Joel B. Silva, Andrea Aladim, Oscar Carvalho, Rubens M. Nascimento, Filipe S. Silva, Antonio E. Martinelli, and Bruno Henriques. "Effect of Zirconia and Alumina Fillers on the Microstructure and Mechanical Strength of Dental Glass Ionomer Cements." Open Dentistry Journal 10, no. 1 (March 15, 2016): 58–68. http://dx.doi.org/10.2174/1874210601610010058.
Full textAbstract:
Background: Glass-ionomer cements perform a protective effect on the dentin-pulp complex considering the F ions release and chemical bonding to the dental structures. On the other hand, those materials have poor physic-mechanical properties in comparison with the restorative resin composite. The main aim of this work was to evaluate the influence of zirconia and/or alumina fillers on the microstructure and strength of a resin modified glass-ionomer cement after thermal cycling. Methods: An in vitro experimental study was carried out on 9 groups (n = 10) of cylindrical samples (6 x 4 mm) made from resin modified glass-ionomer (Vitremer, 3M, USA) with different contents of alumina and/or zirconia fillers. A nano-hybrid resin composite was tested as a control group. Samples were mechanically characterized by axial compressive tests and electron scanning microscopy (SEM) coupled to energy dispersive X-ray spectrophotometry (EDS), before and after thermal cycling. Thermal cycling procedures were performed at 3000, 6000 and 10000 cycles in Fusayama´s artificial saliva at 5 and 60 oC. Results: An improvement of compressive strength was noticed on glass-ionomer reinforced with alumina fillers in comparison with the commercial glass ionomer. SEM images revealed the morphology and distribution of alumina or zirconia in the microstructure of glass-ionomers. Also, defects such as cracks and pores were detected on the glass-ionomer cements. The materials tested were not affected by thermal cycling in artificial saliva. Conclusion: Addition of inorganic particles at nano-scale such as alumina can increase the mechanical properties of glass-ionomer cements. However, the presence of cracks and pores present in glass-ionomer can negatively affect the mechanical properties of the material because they are areas of stress concentration.
3
Nicholson, J. W. "Glass ionomer dental cements: update." Materials Technology 25, no. 1 (March 2010): 8–13. http://dx.doi.org/10.1179/175355509x12614966220506.
Full text
4
Spinola, Manuela, Amanda Maria Oliveira Dal Piva, Patrícia Uchôas Barbosa, Carlos Rocha Gomes Torres, and Eduardo Bresciani. "Mechanical Assessment of Glass Ionomer Cements Incorporated with Multi-Walled Carbon Nanotubes for Dental Applications." Oral 1, no. 3 (July 8, 2021): 190–98. http://dx.doi.org/10.3390/oral1030019.
Full textAbstract:
Background: Nanoparticles such as multi-walled carbon nanotubes present resistance, resilience and biocompatibility with human tissues and could be incorporated into glass ionomer cement materials to improve their characteristics. Therefore, the aim of the present study was to evaluate the effect of multi-walled carbon nanotube (MWCNT) incorporation on different glass ionomer cements’ compressive (σc) and diametral tensile strengths (σt). Methods: Eighty (80) specimens were divided into four groups (N = 20/gr) according to the glass ionomer cement type (conventional and high-viscosity) and the presence or absence of multi-walled carbon nanotubes. Samples were kept in water for 24 h prior to the tests. Data were analyzed using two-way ANOVA and Tukey’s test (p = 0.05). Results: For both σc (p = 0.1739) and σt (p = 0.2183), the glass ionomer cements’ viscosity did not influence the results. The presence of MWCNTs decreased the mean compressive strength values (p = 0.0001) and increased the diametral tensile strength (p = 0.0059). For both conventional and high-viscosity glass ionomer cements, the compressive strength values were higher than the tensile strength data. Conclusions: Regardless of the cement viscosity, the multi-walled carbon nanotube incorporation reduced the compressive strength and increased the tensile strength values.
5
Lee, Ju Hye, Sang Bae Lee, Kyoung Nam Kim, Kwang Mahn Kim, and Yong Keun Lee. "Antibacterial Effect of Silver-Zeolites in Glass-Ionomer Cements." Key Engineering Materials 330-332 (February 2007): 831–34. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.831.
Full textAbstract:
In this study, the antibacterial effects of glass ionomer cement containing silver-zeolite were evaluated. New antibacterial glass ionomer cements with silver-zeolite were prepared as follows. Silver-zeolite (1, 3, and 5 wt%) was incorporated into the glass ionomer cement powder and then mixed with the polyacidic liquid at the ratio recommended by the manufacturer. Agar diffusion test was used to evaluation of antibacterial effect. Setting time, film thickness and compressive strength were also determined. Paired samples t-tests and ANOVA were used, and P<0.05 was considered significant. Film thickness and setting time were increased dependent on the amount of silver-zeolite. Glass ionomer cement with 1 wt% of silver-zeolite seemed to increase the compressive strength. However, increasing ratio of compressive strength was diminished beyond 3 wt%. Glass ionomer cements containing silver-zeolite have been successfully demonstrated to have antimicrobial effects on S. mutants in vitro. These results indicate that glass ionomer cement containing silver-zeolite have the potential to enhance antibacterial of dental cement in oral cavity.
6
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.
Full textAbstract:
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.
7
Yoon, S. I., Yong Keun Lee, Yeon Ung Kim, Min Chul Kim, Kyoung Nam Kim, S. O. Kim, and H. J. Choi. "The Effects of Hydroxyapatite on Bonding Strength between Dental Luting Cement and Human Teeth." Key Engineering Materials 284-286 (April 2005): 953–56. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.953.
Full textAbstract:
This study aimed to investigate the effects of hydroxyapatite on bonding strength between dental luting cement and human teeth. In the previous study, bonelike forming ability by mixing hydroxyapatite with several bone cements was reported in a protein-free acellular simulated body fluid with ion concentrations nearly equal to those of the human blood plasma. Therefore in this experiment, we assumed that if bonelike apatite layer could form between dental luting cement and human teeth, the bonding strength between the two would improve. In addition, we expected the HA mixed dental luting cement to improve the physical properties. Fuji I glass ionomer and Relyx™ glass ionomer cement were the selected dental luting cements and the film thickness, setting time and compressive strength were measured mixing various concentrations of hydroxyapatite. Glass ionomer cement with the most superior physical properties(Fuji I ; 20% hydroxyapatite, Relyx™ ; 15% hydroxyapatite) was immersed in the simulated body fluid for three weeks and the surface was observed under SEM after measuring the bonding strength. As the concentration of HA increased, the film thickness of hydroxyapatite-glass ionomer cement decreased, the setting time increased, and the compressive strength increased. The most noteworthy results were that bonding strength increased, and that bonelike apatite formed on the tooth surface when observed under SEM.
8
Ruxandra, Bartok, B. Dimitriu, C. Varlan, R. Stanciu, Scarlatescu Sanziana, Mitran Loredana, M. Mitran, Gheorghiu Irina, Suciu Ioana, and D. M. Iliescu. "Microscopic evaluation regarding time behavior of orthodontic cements used for disjunctor cementing." ARS Medica Tomitana 21, no. 4 (November 1, 2015): 191–95. http://dx.doi.org/10.1515/arsm-2015-0044.
Full textAbstract:
Abstract In order to fulfill their function, orthodontic devices must be cemented on teeth using orthodontic rings. The retention of the orthodontic ring is influenced mainly by the type of dental-ring adhesion. This study was initiated to determine possible microleakage events while using zinc phosphate cement Adhesor (Spofa Dental), conventional glass ionomer Ketac Cem (3M ESPE) and Fuji Ortho (GC) and a compomer Transbond Plus (3M Unitek). The results of the study are consistent with those reported in the literature reference, the compomer is the preferred adhesive material for cementing the orthodontic rings, compared to conventional glass ionomer cements and zinc-phosphate cement.
9
Lima, Thalyta Brito Santos, Isabela Nunes Souza, Raquel Santos De Oliveira, João Milton Rocha Gusmão, Isabel Celeste Caires Pereira Gusmão, and Alberto N. G. Antunes. "Antimicrobial activity of different dental cements on aggregatibacter actinomycetemcomitans." Revista de Odontologia da Universidade Cidade de São Paulo 29, no. 1 (January 1, 2017): 42. http://dx.doi.org/10.26843/ro_unicid.v29i1.195.
Full textAbstract:
Objectives: The objective of this study was to evaluate, in vitro, the possible antimicrobial activity against the A actinomycetemcomytans of three dental cements: glass-ionomer cement, zinc phosphate cement and resin cement. Material and Methods: Strains of A actinomycetemcomitans ATCC 29522 were used. The microorganism was grown in BHI Agar and transferred to tubes containing sterile saline solution. The suspension was calibrated to a similar turbidity to the 0.5 tube from McFarland scale. A base layer consisting of 20 ml of BHI agar was placed in sterile Petri 90 x 15 mm plates. After solidification, was added 0,1 uL of microbial suspension, and three wells with 6 mm in diameter and 1mm deep were made, the wells were filled with cements with zinc phosphate cement, glass-ionomer cement and resin cement indicated for permanent cementation for fixed prostheses immediately after handling and positive (chlorhexidine) and negative (saline) controls. Results: After 48 hours the presence or absence of inhibition halo of microbial growth was analyzed around the specimens. Conclusion: Zinc phosphate cement and glass ionomer cement tested showed antibacterial activity against A actinomycetemcomitans unlike resin cement.
10
Borș, Andreea, Melinda Székely, Cristina Molnar-Varlam, and Iulian Vasile Antoniac. "Bioactivity of Retrograde Dental Root Filling Materials." Key Engineering Materials 695 (May 2016): 236–42. http://dx.doi.org/10.4028/www.scientific.net/kem.695.236.
Full textAbstract:
The placement of appropriate root-end filling materials in contact with periradicular tissues, with improved adaptation and biological properties is critical for the long-term success of the periapical surgery. The purpose of the present study was to evaluate and compare the bio-properties of four different root canal filling materials with respect to storage media. Two mineral trioxide aggregates: MTA-Angelus (Angelus, Londrina, PR, Brazil) and ProRoot MTA (Dentsply Maillefer, Ballaigues, Switzerland) and two glass ionomer cements: one conventional Ketac Molar (3M ESPE AG, Seefeld, Germany) and a resin reinforced core build-up glass ionomer Vitremer (3M ESPE AG, Seefeld, Germany) were evaluated. Eighty healthy single-rooted human extracted teeth without curvature and with closed apices were included in this experiment. The canals were instrumented with K-files up to size #35. Adequate irrigation was performed during preparation and instrumentation using 2.6% NaOCl. Root canals were obturated with vertically condensed gutta-percha and roots end were apically resected 3mm. The samples were randomly divided in four groups (n=20) and each group was assigned to one of the four tested materials. Three-mm depth preparations were made at root ends using cylindrical diamond burs and constant water spray, and were filled with the tested materials. The roots were then wrapped in wet gauze and placed in an incubator at 37°C for 48 hours to allow complete set of the root-end filling materials. Each group was divided in two subgroups (n=10) and stored in polypropylene sealed containers for 60 days at 37°C. Specimens of the first subgroup were immersed in 5ml of a physiological-like buffered Ca- and Mg-free solution (PBS, pH=7.4) and those of the second subgroup were in 5ml of deionized water (DW, pH 6.8) After 10 minutes of immersion and at the established endpoint times, the specimens were analyzed by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). Statistical analysis was performed by t-test and one-way ANOVA (p<0.05). The morphology of cement–dentin interface in fresh restorations soaked 10 min in PBS showed the margins of all cements free from porosities or gaps. EDX elemental analyzes on MTA and ProRoot MTA revealed calcium, silica and phosphorous peaks, while on Ketac Molar and Vitremer, aluminum, silica, zinc and fluoride peaks were detected. After 60 days of immersion in PBS calcium-phosphate deposits completely covered the surface, the margin and partially also the peripheral dentin surface of MTA and Pro Root MTA. Glass ionomer cements showed the presence of thick irregular deposits (p<0.05). In deionized water, EDX analyses revealed no deposits forming after 60 days. SEM analysis showed the margins of MTA and ProRoot MTA with significant discontinuities compared with glass ionomer cements (p<0.05). Mineral trioxide aggregate cements are significantly more bioactive compared to conventional or reinforced glass ionomers upon aging in PBS. Glass ionomer cements provide more optimal adaptation to dentinal cavity walls of all cements than MTA cements when used as retrograde fillings.
11
Mjor, I. A., I. Nordahl, and L. Tronstad. "Glass ionomer cements and dental pulp." Dental Traumatology 7, no. 2 (April 1991): 59–64. http://dx.doi.org/10.1111/j.1600-9657.1991.tb00185.x.
Full text
12
Salehi, Ghazaleh, Aliasghar Behnamghader, Mohamad Pazouki, and Masoud Mozafari. "Metronidazole‐loaded glass ionomer dental cements." International Journal of Applied Ceramic Technology 17, no. 4 (February 5, 2020): 1985–97. http://dx.doi.org/10.1111/ijac.13480.
Full text
13
Smith, D. C. "Dental Cements." Advances in Dental Research 2, no. 1 (August 1988): 134–41. http://dx.doi.org/10.1177/08959374880020010501.
Full textAbstract:
The manifold uses of dental cements-as (a) luting agents, (b) cavity linings and bases, and (c) restorations for teeth—make them perhaps the most important materials in clinical dentistry. The research of the last 10 years has resulted in four main types, classified by matrix-forming species: (1) phosphate, (2) phenolate, (3) polycarboxylate, and (4) polymethacrylate. The zinc phosphate cements continue to be widely used for luting in an essentially unchanged form. Acidity and oral dissolution remain as problems. The zinc-oxide eugenol cements and their modifications are useful as linings and temporary materials but are susceptible to hydrolytic breakdown. Vanillate cements may be an improvement. Calcium hydroxide-salicylate cements are widely used as cavity linings, especially on exposures, and show improved resistance to acid dissolution. Polycarboxylate cements as both zinc polycarboxylate and glass-ionomer cements show adhesion potential, good physical properties, fluoride release, and, generally, good biological properties. Glass-ionomer cements when correctly manipulated show minimal oral dissolution. Polymethacrylate cements have been used principally for bonding etched cast metal restorations to etched enamel. Recently, adhesive crown-and-bridge cements have been developed. There are no well-established correlations between laboratory measurements of apparently relevant properties and clinical performance. More clinically-based research is needed to facilitate the development of new cements.
14
Klai, Sina, Markus Altenburger, Bettina Spitzmüller, Annette Anderson, Elmar Hellwig, and Ali Al-Ahmad. "Antimicrobial Effects of Dental Luting Glass Ionomer Cements onStreptococcus mutans." Scientific World Journal 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/807086.
Full textAbstract:
Objective. To reduce secondary caries, glass ionomer luting cements are often used for cementing of indirect restorations. This is because of their well-known antimicrobial potential through the release of fluoride ions. The aim of thisin vitrostudy was to investigate the antimicrobial effect of five dental luting cements which were based on glass ionomer cement technology.Methods. Five different glass ionomer based luting cements were tested for their antimicrobial effects onStreptococcus mutansin two different experimental setups: (i) determination of colony-forming units (CFUs) in a plate-counting assay; (ii) live/dead staining (LDS) and fluorescence microscopy. All experiments were conducted with or without prior treatment of the materials using sterilized human saliva. Antimicrobial effects were evaluated for adherent and planktonic bacteria. Bovine enamel slabs (BES) were used as negative control. BES covered with 0.2% chlorhexidine (CHX) served as positive control.Results. Each of the tested materials significantly reduced the number of initially adhered CFUs; this reduction was even more pronounced after prior incubation in saliva. Antimicrobial effects on adherent bacteria were confirmed by live-dead staining.Conclusion. All five luting cements showed an antimicrobial potential which was increased by prior incubation with human saliva, suggesting an enhanced effectin vivo.
15
Carey, C. M., M. Spencer, R. J. Gove, and F. C. Eichmiller. "Fluoride Release from a Resin-modified Glass-ionomer Cement in a Continuous-flow System: Effect of pH." Journal of Dental Research 82, no. 10 (October 2003): 829–32. http://dx.doi.org/10.1177/154405910308201013.
Full textAbstract:
Fluoride is added to many dental restorative materials, including glass-ionomer cements, for the specific purpose of leaching fluoride into the surrounding tissues to provide secondary caries inhibition. During the caries process, an acidic environment attacks the dental tissues as well as the glass-ionomer cement. We hypothesized that pH significantly affects the rate of release of fluoride from the glass-ionomer cement. A continuous-flow fluoride-measuring system that monitors the amount of fluoride released over time was used to determine the release of fluoride from a resin-modified glass-ionomer cement (KetacFil®). The results show that the release rate began with a fast burst of fluoride which quickly diminished to low levels in 3 days. Under neutral pH conditions, the rate of fluoride release at 72 hrs was significantly slower than at pH 4.
16
Saridena, Udaya Sri Naga Gayatri, Gnana Siva Sai Jayalaksmi Sanka, Rama Krishna Alla, Ramaraju AV, Suresh Sajjan MC, and Satyanaryana Raju Mantena. "An overview of advances in glass ionomer cements." International Journal of Dental Materials 04, no. 04 (2022): 89–94. http://dx.doi.org/10.37983/ijdm.2022.4403.
Full textAbstract:
Glass-ionomer dental cements (GICs) are aesthetic direct restorative materials with anticariogenic activity. Glass-ionomers are composed of alumino-silicate glass powder and poly acrylic acid liquid. The significant characteristics of GICs among restorative materials are their ability to bond to moist tooth structure without any pre-treatment and to provide a prolonged period of fluoride release, which prevents subsequent tooth decay (caries). These characteristics, along with the materials' acceptable aesthetics and biocompatibility, make them popular and desirable for use in medical and dental applications. However, GICs exhibit poor mechanical qualities and moisture sensitivity. To improve their mechanical and physical qualities, the GIC powders have undergone extensive formulation and modification. This paper provides an overview of various fillers used to enhance the mechanical and physical properties of GICs.
17
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.
Full textAbstract:
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.
18
Márcia Furtado Antunes de Freitas, Leandro Jum Imai, César Antunes de Freitas, Eduardo Carlos Bianchi, Carina Thaís de Almeida, and Ismar Eduardo Martins Filho. "Abrasive wear of two glass ionomer cements after simulated toothbrushing." RSBO 8, no. 3 (September 28, 2012): 287–93. http://dx.doi.org/10.21726/rsbo.v8i3.1073.
Full textAbstract:
Introduction and objective: Glass ionomer cement, which was first introduced in Dentistry in 1972, presents good qualities such as aesthetics, fluoride release and adhesion to dental tissues. Because of its preventive characteristics regarding to dental caries, glass ionomer cement has been used for Atraumatic Restorative Treatment (ART), as reported by Frencken and Holmgren [6], meeting the principles announced by the World Health Organization (WHO) for application to large population groups without regular access to dental care. Material and methods: In this present study, the abrasive wear strength of two glass-ionomer cements (Vidrion R®and ChemFlex®) was evaluated through toothbrushing machine. Classic® toothbrushes with soft bristles and Sorriso® dentifrice were also used for the study. Results: Student-t test showed significant difference between both groups, with tobs value = 9.4411 at p < 0.05. Conclusion: It can be concluded that the wear rate caused by toothbrush/dentifrice was higher for Vidrion R® (52.00 mg) than ChemFlex® (5.57 mg).
19
Tonetto, Mateus Rodrigues, Milton Carlos Kuga, Matheus Coelho Bandeca, Weber Adad Ricci, José Cláudio Martins Segalla, Suellen Nogueira Linares Lima, Ana Carolina Venção, Miriam Graziele Magro, Aimeé Maria Guiotti, and Keren Crisitina Fagundes Jordão-Basso. "Effect of Carbamide Peroxide on the Push-out Bond Strength of Different Composition Glass-Ionomer Cement to Root Canal Dentin when used as Cervical Barrier." Journal of Contemporary Dental Practice 16, no. 12 (2015): 944–49. http://dx.doi.org/10.5005/jp-journals-10024-1786.
Full textAbstract:
ABSTRACT Aim To evaluate the effect of 37% carbamide peroxide on the bond strength of conventional or resin-modified glass-ionomer cements when used as a cervical barrier in endodonticallytreated teeth. Materials and methods After root canal instrumentation and obturation, 40 specimens of the cement-enamel junction were obtained after transversal root canal sectioning from human extracted canines. The root canal specimens were standardized and filled with the following materials (n = 10, each group): G1: zinc phosphate (control), G2: Ketac glass-ionomer, G3: vitrebond glass-ionomer or G4: GC GL glass-ionomer. After 24 hours, the specimens were subjected to an application of 37% carbamide peroxide for 21 days, changed each 7 days and stored in an artificial pulp chamber. The specimens were then submitted to push-out bond strength testing with an electromechanical test machine (EMIC) and the failure mode in each specimen was analyzed with confocal microscopy (LEXT). Results G3 and G4 showed higher bond strengths values than the other groups (p < 0.05), and were similar to each other (p > 0.05). G1 showed the lowest bond strength value (p < 0.05). Conclusion Glass-ionomer cements showed higher bond strength values than the zinc phosphate cement, and resinmodified glass-ionomer cements presented the highest push-out values to root canal dentin (GC, GL and Vitrebond). Clinical significance Glass ionomer cements are recommended to use as cervical barrier materials before the internal dental bleaching, but its efficiency is questionable. How to cite this article Lima SNL, Venção AC, Kuga MC, Magro MG, Guiotti AM, Segalla JCM, Jordão-Basso KCF, Ricci WA, Tonetto MR, Bandéca MC. Effect of Carbamide Peroxide on the Push-out Bond Strength of Different Composition Glass-Ionomer Cement to Root Canal Dentin when used as Cervical Barrier. J Contemp Dent Pract 2015;16(12):944-949.
20
Sriyudthsak, Mana, Yaninee Kosaiyakanon, Fan Pui Luen, Kamolporn Wattanasirmkit, and Viritpon Srimaneepong. "Micromorphology of Porosity Related to Electrical Resistance of Dental Luting Cements." Key Engineering Materials 766 (April 2018): 13–18. http://dx.doi.org/10.4028/www.scientific.net/kem.766.13.
Full textAbstract:
The aim was to investigate the relation between micromorphology of porosity and electrical resistance of dental luting cements. Five dental luting cements were evaluated: zinc phosphate, glass ionomer, and three types of resin luting cements. Porosity of the specimen was analyzed by micro-CT and electrical resistance of cement was measured at voltage of 125 V up to 30 days and solubility of each specimen was calculated. It showed that the resin luting cements provided the highest electrical resistance regardless of amount of porosity. Zinc phosphate and glass ionomer had high porosity and the lowest resistance (14 and 3 kΩ, respectively). It was found that the electrical resistance of luting cement was not directly affected by the amount of porosity, but it seems to be related to pore connection. There is no correlation between electrical resistance and percentage of porosity but the morphology of porosity may have an influence on the electrical property of luting cement. Models of pore connection were proposed to explain the electrical resistance of luting cement.
21
Vega-Jiménez DDS, MSc, PhD, Alejandro L., Ana G. Rodríguez-Hernández DDS, MSc, PhD, María Cristina Piña-Barba PhD, and Javier Ambrosio-Hernández PhD. "Effect of Ions Released and pH of Two Glass Ionomer Cements in Human Gingival Fibroblasts." Odovtos - International Journal of Dental Sciences 21, no. 1 (January 1, 2019): 67–77. http://dx.doi.org/10.15517/ijds.v21i1.34886.
Full textAbstract:
Conventional glass ionomer cements are used as dental provisional restorative materials, which present several advantages such as adhesion to the tooth mineral phase among others. On the other hand, the knowledge about biological property of glass ionomers shows various approaches and results. In this work, it was studied the in vitro biological response of human gingival fibroblasts in contact with commercial cements of glass ionomer: Mirafil® and Ionglass® and with their extracts, according to ISO 10993. The extracts of the cements, in which the cells were cultured, were adjusted at different concentrations ranging 0.1% to 100%. The cellular metabolic activity of gingival fibroblasts was measured using the Alamar Blue® reagent. The results showed a significant effect on the cellular metabolic activity correlated with the concentration of liberated ions (Al³+ and Ca²+) for both ionomers, as well as the pH variations of the culture media. This could mean that the cellular metabolic activity is substantially influenced by ions and pH of the cell culture.
22
Swartz, M. L. "Dental Cements: Reactor Response." Advances in Dental Research 2, no. 1 (August 1988): 142–44. http://dx.doi.org/10.1177/08959374880020010601.
Full textAbstract:
This paper is in response to Dr. Dennis Smith's paper, which dealt with the current status of dental cements and recommendations with respect to future research needs. Interest in cements and research in this area have mushroomed with the development of polycarboxylate and glass-ionomer cements. Despite this increased research, there still exist significant voids, which can only be elucidated by further concerted research efforts, both laboratory and clinical. With newer systems -e.g., the polycarboxylate and glass-ionomer cements—properties such as modulus of elasticity, which were of little concern with the phosphate cements, have now assumed clinical relevance. Also, the need persists to develop an in vitro test that reflects the relative resistance of cements to disintegration in the oral cavity. Finally, greater efforts should be expended by the research community to disseminate new findings to the dental practitioner in order that the patient population may benefit from the latest advances in materials.
23
Anstice, H. M., J. W. Nicholson, and J. F. McCabe. "The Effect of Using Layered Specimens for Determination of the Compressive Strength of Glass-ionomer Cements." Journal of Dental Research 71, no. 12 (December 1992): 1871–74. http://dx.doi.org/10.1177/00220345920710120301.
Full textAbstract:
Compressive strength is widely used as the criterion of strength of glass-ionomer dental cements, despite the difficulties in interpretation of the findings. With the introduction of light-cured glass-ionomer cements, which can be used only in thin layers, the question arises of how test specimens should be prepared for the measurement of compressive strength. A suggested method has been to prepare test pieces by building them up in layers, an approach which is examined critically in the current paper. Two different conventional (acid-base) glass-ionomers were studied with the use of layered and unlayered specimens of dimensions 6 mm (height) x 4 mm (diameter) and 12 mm (height) x 6 mm (diameter). While smaller samples gave the same value of compressive strength as larger specimens, layered specimens gave significantly lower values of compressive strength for both sizes. In view of these findings, and since the layered specimens are tedious to prepare, we conclude that compressive strength is unsatisfactory as a criterion of strength for light-cured glass-ionomer cements.
24
Bayne, Stephen C. "Dental Composites/Glass Ionomers: Clinical Reports." Advances in Dental Research 6, no. 1 (September 1992): 65–77. http://dx.doi.org/10.1177/08959374920060011901.
Full textAbstract:
Composites and glass ionomers have not been extensively tested in clinical trials for biological safety. Most clinical evaluations have looked at other factors, such as retention, wear, or color. The primary evaluation criterion used in clinical trials is post-operative sensitivity. Sensitivity does not seem to have any correlation to pulpal inflammation. Inflammation can be the result of mechanical, thermal, chemical, and bacterial insults. It is complicated for individual contributions to be separated in short-term studies. General usage of these materials over about 20 years indicates a high benefit-to-risk ratio. Despite some complaints of sensitivity with some glass-ionomer compositions, both composites and glass ionomers are relatively trouble-free. There is no evidence of short-term or long-term risk. Toxicological studies have focused almost exclusively on pulpal reactions. Systemic reactions have not been closely examined, although there is no suspicion of any problems after virtually billions of procedures in the United States. New glass-ionomer cements are similar to contemporary composite formulations. Continued development of these materials may ultimately produce an amalgam replacement material that is economically and philosophically desirable to general dentists.
25
Szczesio-Wlodarczyk, Agata, Karolina Rams, Karolina Kopacz, Jerzy Sokolowski, and Kinga Bociong. "The Influence of Aging in Solvents on Dental Cements Hardness and Diametral Tensile Strength." Materials 12, no. 15 (August 2, 2019): 2464. http://dx.doi.org/10.3390/ma12152464.
Full textAbstract:
Prosthetic materials must exhibit adequate resistance to the oral environment. The aim of this paper was to study the resistance of selected cements used for cementing restorations (Breeze—composite, Adhesor Carbofine—zinc-polycarboxylate and IHDENT–Giz type II—glass-ionomer) against ethanol, soda and green tea solutions. The highest values of hardness and DTS (diametral tensile strength) were obtained by composite cement (HV = 15–31, DTS = 34–45 MPa). Ethanol solution had the greatest impact on the hardness value of composite cement, and soda solution on zinc-polycarboxylate cement. No significant differences were noted in the DTS values of composite cements after immersion in solvents; however, the DTS value of zinc-polycarboxylate cement increased after prolonged immersion time in ethanol and the DTS of glass-ionomer cement (IHDENT Giz type II) clearly decreased after submersion in soda solutions. Variation in pH across the range of 6 (tea) to 9 (soda solution) had a low impact on the properties of dental cements. Extended exposure to solvents appears to worsen the properties of cements.
26
Nicholson, John W. "Maturation processes in glass-ionomer dental cements." Acta Biomaterialia Odontologica Scandinavica 4, no. 1 (January 1, 2018): 63–71. http://dx.doi.org/10.1080/23337931.2018.1497492.
Full text
27
Romanenko, A., A. Buzov, V. Chuev, V. Doroganov, and E. Lukin. "DENTAL MATERIALS BASED ON ALUMINO-FLUOROSILICATE GLASS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 7, no. 9 (September 16, 2022): 77–87. http://dx.doi.org/10.34031/2071-7318-2022-7-9-77-87.
Full textAbstract:
The article presents the results of an analytical review of the literature on glass ionomer (glass polyalkenate) cements, which are widely used in dentistry. This materials consist from the powder and liquid, which form a plastic mass at mix that sets to form a solid. The composition of the powder and liquid components of glass ionomer cement has been analyzed. The solid component is powdered calcium or strontium aluminofluorosilicate glass, the liquid component is an aqueous solution of acrylic acid homopolymer or its copolymer with methylene-succinic acid, maleic acid and other monomers. Information about the range of compositions of aluminofluorosilicate glass, raw materials and melting process parameters are represented. An analysis of the curing mechanism of this dental material is also carried out. Acid-base interaction and cross-linking of polymeric acid molecules with ions extracted from glass occur at mixing the powder and liquid components. The final microstructure of the hardened glass ionomer cement is partially decomposed glass particles embedded in a matrix of calcium and aluminum polyalkenoates and coated with a layer of silica gel. The information presented in this review may be useful for a comprehensive understanding by dentists, developers of dental materials and scientific groups conducting research in this subject area of the physicochemical process of curing this material.
28
Yanishen, I. V., and O. V. Sidorova. "COMPARATIVE EVALUATION OF PHYSICO-MECHANICAL PROPERTIES OF DENTAL CEMENTS FOR PERMANENT FIXATION OF ORTHOPEDIC CONSTRUCTIONS." Ukrainian Dental Almanac, no. 2 (June 19, 2019): 59–63. http://dx.doi.org/10.31718/2409-0255.2.2019.12.
Full textAbstract:
Fixation of indirect constructions restoration with permanent cement is the final clinical stage of orthopedic treatment. It should be noted that the result of the treatment with the using of unremovable dentures essentially depends on the correct choice of cement for fixation.
The comparative analysis conducted to improve the quality of fixing method of unremovable dentures was carried out on the base of the Research laboratory of dental materials and products of JSC «STOMA», Ukraine.
We used the following materials: glassionomer cements “KetakCem”, Germany; “Riva”, Australia. The study of physico-mechanical properties of materials was carried out according to the following parameters: determination of the strength of the diametrical stretching (T, MPa), bending strength (σ, MPa), determination of the water absorption index (W, μg / mm³), free linear shrinkage (L,%), solubility index (D,%), and compressive strength (C, MPa).
At the determination of the strength the diametrical stretching index (T, MPa) according to the results of laboratory tests "Ketac Cem", "Riva" and the new glass ionomer cement developed by us for permanent fixing of unremovable dentures.We have received that the indices of all selected cements are within 8.8 - 9.9 MPa which are close to international standards ISO 4104.
Also we found out that the boundary value at the diametral stretched "Riva", which is (8.9 ± 0.3) MPa, is not greater than Ketac Cem (9.9 ± 0.6) and is reliably non-existent significant differences (p> 0.05). The glass ionomer cement developed by us with an index of 8.8 ± 0.5% (T, MPa) with a certainty (p> 0.05) has no difference between the indicators of «Ketac Cem» and «Riva» materials.
Consequently, the strength limit at the diametrical extension of a new glass ionomer cement for permanent fixation has no significant difference compared with its foreign analogues (p> 0,05). The strength of the curtain (σ, MPa) of the materials under investigation for fixing unremovable dentures varies within (55.9 ± 70.2). It was found out that the durability of a new glass ionomer dental cement is (58.3 ± 0.4%). It is significantly lower (p <0,001) than the ‘Ketac Cem’ material - 70,2 ± 0,7%, while the "Riva" (55,9 ± 0,8%) has the least value.
We indicate that the strength of the material @Riva "is significantly lower (p <0.001). In determining the rate water absorption, we obtained the following results: the glass ionomer cement developed by us has the limits of water absorption which is 42.7 ± 0.4 μg / mm3 compared with the analogues Ketac Cem and Riva - 36.3 ± 0.6 and 39 , 7 ± 0.3 μg / mm 3, respectively. The data of statistical processing showed that the water absorption of glass ionomeric cements is significantly lower (p <0,001). Free linear shrinkage of new glass ionomer cement has limits of 0,44 ± 0,03%, which exceeds the value of "Ketac Cem" (0,33 ± 0,02) by 0,11±0,01%, and is significant (p <0, 05) is less in comparison with "Riva", the index of which is 0,66±0,09%. The solubility index of the cement we developed is 1.30 ± 0.16%, which is 0.07 ± 0.03% higher than Ketac Cem - 1.23 ± 0.17%, but not significantly different from the material "Riva ", which index is 1.32±0.14%, which corresponds to ISO, but these data do not have statistically significant differences (p> 0.05).
The results of the compression strength index are characterized not by a significant difference between them: the cement developed is 76.2 ± 0.4% MPa, which is significantly (p <0.001) 2.4 ± 0.1% less than Ketac Cem - 78.6 ± 0,5%, but does not have a significant difference (p> 0,05) between the developed material and the «Riva» index which is 76,0 ± 0,8%, respectively.
29
Gönder, Hakan Yasin, Mehmet Gökberkkaan Demirel, Reza Mohammadi, Sinem Alkurt, Yasemin Derya Fidancioğlu, and Ibrahim Burak Yüksel. "The Effects of Using Cements of Different Thicknesses and Amalgam Restorations with Different Young’s Modulus Values on Stress on Dental Tissue: An Investigation Using Finite Element Analysis." Coatings 13, no. 1 (December 21, 2022): 6. http://dx.doi.org/10.3390/coatings13010006.
Full textAbstract:
Background: In this study, it was aimed to use a finite element stress analysis method to determine the amount of stress on enamel, dentin, restoration, resin cement and glass ionomer cement in amalgam class II disto-occlusal (DO) cavities by using two different cements with different thicknesses and amalgams with different Young’ s modulus values, respectively. Methods: A three-dimensional tooth model was obtained by scanning an extracted human maxillary first molar with dental tomography. A class II DO cavity including 95-degree cavity margin angles was created. Resin cement (RC) and glass ionomer (GI) cement with different Young’ s modulus measures (RC: 7.7 GPa, GI: 10.8 GPa) were used in amalgam. Different thickness combination groups were simulated: 50 μm, 100 μm and 150 μm. Additionally, amalgams with different Young’ s modulus values were used with the same thickness of different cements (Amalgam Young’s modulus: 35 GPa and 50 GPa). A load of 600 N was delivered to the chewing area. The stress distributions on enamel, dentin, restoration, resin cement and class ionomer cement were then analyzed using finite element analysis. Results: The most stress accumulation was observed in the enamel tissue across all groups where resin cement or glass ionomer cement were used in different thicknesses and where amalgam restorations were used with different Young’s modulus values. The least stress accumulation was observed in the cement itself. Conclusion: According to the results obtained, there was no difference between the two cement types in terms of stress accumulations in the models. However, when the same cements with different thicknesses were evaluated, it was concluded that the presence of both glass ionomer and resin cement with a thickness of 150 μm causes less stress on the restoration surface. Furthermore, when the cements were combined with different thicknesses and with different amalgam Young’ s modulus values, it was concluded that 50 GPa causes less stress on restoration surface.
30
Figurová, M., V. Ledecký, and S. Štvrtina. "Evaluation of Marginal Microgaps of Two Glass-ionomer Cements (GIC) in Dogs and Sheep in vivo." Acta Veterinaria Brno 75, no. 3 (2006): 403–10. http://dx.doi.org/10.2754/avb200675030403.
Full textAbstract:
The aim of the experiment was to evaluate the marginal microgaps of two ionomer cements: Kavitan Plus (Spofa Dental) and Vitremer (3M ESPE) in dog and sheep dentition in vivo. Dentitions of sheep and dogs were restored in vivo with a conventional, glass polyalkenoic, chemically activated cement Kavitan Plus with hydrophilic properties capable and with a resinmodified glass-ionomer cement Vitremer with light-induced polymerization and autopolymerization reaction of methyl metacrylate group. The parameters of glass-ionomers were evaluated in 6 groups of animals, 2 animals in each, at various time intervals (after 1, 4 and 6 months in dogs and 3, 6 and 9 months in sheep, starting from the beginning of the experiment). The restorative materials were placed to buccal surfaces of permanent teeth. At the intervals specified, under general injection anaesthesia, throughout the experiment we extracted 24 teeth from sheep and 30 from dogs. When processing the samples of dog's teeth two samples were damaged. One month after the placement, Kavitan plus restorations became loose only in one case in dogs (80% successfulness). In sheep two Kavitan Plus restorations became loose after 9 months (50% successfulness). During the experiment we observed neither cracks nor marginal discoloration in both Kavitan Plus and Vitremer restorations. Statistically significant (P = 0.04) differences were observed in the dentin of dogs receiving glass-ionomer Vitremer restorations which exhibited lower marginal microgaps. The remaining results were non- significant (ANOVA test). Fluoride ions released from GIC support the treatment of dental hard tissues. These materials could be used as definitive restorations of class A - D cavities in dogs and dental cervical caries in sheep as well as underlying layers ofcomposite and amalgam materials.
31
Mylonas, Petros, Jing Zhang, and Avijit Banerjee. "Conventional glass-ionomer cements: a guide for practitioners." Dental Update 48, no. 8 (September 2, 2021): 643–50. http://dx.doi.org/10.12968/denu.2021.48.8.643.
Full textAbstract:
Glass-polyalkenoate cements, also known as glass-ionomer cements (GICs), are one of the most commonly used bio-interactive restorative dental materials, having been available since the 1970s. With the promotion of minimally invasive operative dentistry (MID), and the reduction in the use of dental amalgam worldwide, the popularity of these materials has grown significantly in recent years. This article outlines the basics and clinical importance of GIC material science, and provides an overview of their use in restorative dentistry. CPD/Clinical Relevance: GICs are versatile dental biomaterials that require correct case selection, material handling and placement technique to ensure optimal clinical success.
32
Gjorgievska, Elizabeta, Gustaaf Van Tendeloo, John W. Nicholson, Nichola J. Coleman, Ian J. Slipper, and Samantha Booth. "The Incorporation of Nanoparticles into Conventional Glass-Ionomer Dental Restorative Cements." Microscopy and Microanalysis 21, no. 2 (February 18, 2015): 392–406. http://dx.doi.org/10.1017/s1431927615000057.
Full textAbstract:
AbstractConventional glass-ionomer cements (GICs) are popular restorative materials, but their use is limited by their relatively low mechanical strength. This paper reports an attempt to improve these materials by incorporation of 10 wt% of three different types of nanoparticles, aluminum oxide, zirconium oxide, and titanium dioxide, into two commercial GICs (ChemFil® Rock and EQUIA™ Fil). The results indicate that the nanoparticles readily dispersed into the cement matrix by hand mixing and reduced the porosity of set cements by filling the empty spaces between the glass particles. Both cements showed no significant difference in compressive strength with added alumina, and ChemFil® Rock also showed no significant difference with zirconia. By contrast, ChemFil® Rock showed significantly higher compressive strength with added titania, and EQUIA™ Fil showed significantly higher compressive strength with both zirconia and titania. Fewer air voids were observed in all nanoparticle-containing cements and this, in turn, reduced the development of cracks within the matrix of the cements. These changes in microstructure provide a likely reason for the observed increases in compressive strength, and overall the addition of nanoparticles appears to be a promising strategy for improving the physical properties of GICs.
33
Petrović, Bojan, Evgenija Marković, Tamara Perić, and Sanja Kojić. "Challenges in Experimental Evaluation of Morphological, Chemo-Mechanical and Adhesive Properties of Glass-ionomer Based Dental Materials." Advanced Technologies & Materials 44, no. 2 (December 20, 2019): 26–30. http://dx.doi.org/10.24867/atm-2019-2-005.
Full textAbstract:
Changes in composition and new material characteristics require verification in clinical and experimental studies. Investigating glass-ionomer cements under laboratory conditions encounters problems in interpreting the results and in comparing them with other types of materials tested in the same way. As the connection between the glass-ionomer cements and the dental tissues is delicate, it is often the case that the impact of fractures and other artifacts is either underestimated or over-dimensioned when interpreting the results. A critical review was performed, with defining the main problems regarding the usage of SEM, EDX and nanoindentation techniques in glass-ionomer based materials evaluation.
34
Endang Suprastiwi, Siti Mardewi Soerono Akbar, Narlan Sumawinata, and Ellyza Herda. "APPLICATION OF GLASS IONOMER CEMENT (GIC) FOR REPAIRING DENTAL PULP BY MEASURING EXPRESSION OF DENTIN MATRIX PROTEIN-1." Dentika: Dental Journal 17, no. 4 (December 12, 2013): 305–9. http://dx.doi.org/10.32734/dentika.v17i4.1777.
Full textAbstract:
Glass ionomer cement (GIC) has a potential to improve the pulp by inducing Dentin Matrix Protein-1 (DMP-1) release that can mineralize dentin. This study used three types of glass ionomer cements; Conventional GIC i.e. GC Fuji IX; resin-modified glass ionomer cement (RMGIC) i.e. GC Fuji II LC and Nano particle of RMGIC i.e. Ketac™ N100 3MEspe. The three materials were applied to the tooth pulp of Macaca nemestrina. Expression of DMP-1 extract-dental pulp of the subjects was investigated by using ELISA. This study was statistically analyzed by using Mann-Whitney test. The result showed that GICs has a potential to induce the expression of DMP-1 and there was no significant differences among the three groups of GIC to induce DMP-1(p≥ 0,05). In conclucion, all tested materials have a potential in dental pulp repair by expressing DMP-1.
35
Engqvist, Hakan, Lars Kraft, Håkan Spengler, and Leif Hermansson. "A Novel Biomineral Water Based Dental Cement." Key Engineering Materials 284-286 (April 2005): 145–48. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.145.
Full textAbstract:
The area of cements in dentistry is steadily growing with the introduction of new systems that need to be cemented to the tooth, e.g. new inlays and crowns. With the better properties of the implants there is a need for new cements with high bond strength, good esthetic and mechanical properties. The bioactive minerals have not been explored as dental cement. This paper investigates the strength, setting time and film thickness of a novel dental cement based on the biomineral Marokite (calcium aluminate) as bonding system. The reactive Marokite powder is mixed with glass filler (ratio of 1.9 by volume) and water (ratio of 0.4 by weight) to a paste, which hardens within 6 minutes and has a working time of 2 minutes. The compressive strength reaches 143 MPa after 24 hours and the flexural strength almost 40 MPa. When the film thickness is measured at the end of the working time it is about 50 µm. Compared to glass ionomer cement (Fuji Cem) and zinc phosphate cement (Harvad) the biomineral system has higher strength and comparable setting time and film thickness. The investigation shows that it is feasible to develop dental cements based on biominerals, in this case a Marokite based material. The cement complies with the given standards.
36
Garg, Pooja, Malesh Pujari, D. R. Prithviraj, and Sumit Khare. "Retentiveness of Various Luting Agents Used With Implant-Supported Prosthesis: An In Vitro Study." Journal of Oral Implantology 40, no. 6 (December 1, 2014): 649–54. http://dx.doi.org/10.1563/aaid-joi-d-12-00008.
Full textAbstract:
Desired retrievability of cemented implant-supported fixed prosthesis makes the retentive strength of cementing agents an important consideration. The aim of the study was to evaluate the retentiveness of purposely designed implant cement and compare its retentiveness with dental cements that are commonly used with implant systems. Ten implant analogs were embedded in auto-polymerizing acrylic resin blocks and titanium abutments were attached to them. Fifty standardized copings were waxed directly on the abutment and casted. The cements used were: (1) resin-bonded zinc oxide eugenol cement, (2) purposely designed implant cement, (3) zinc phosphate cement, (4) zinc polycarboxylate cement, and (5) glass ionomer cement. After cementation, each sample was subjected to a pull-out test using universal testing machine and loads required to remove the crowns were recorded. The mean values and standard deviations of cement failure loads were analyzed using ANOVA and Bonferroni test. The mean values (± SD) of loads at failure (n = 10) for various cements were as follows (N): resin-bonded zinc oxide eugenol cement 394.62 (± 9.76), Premier implant cement 333.86 (± 18.91), zinc phosphate cement 629.30 (± 20.65), zinc polycarboxylate cement 810.08 (± 11.52), and glass ionomer cement 750.17 (± 13.78). The results do not suggest that one cement type is better than another, but they do provide a ranking order of the cements regarding their ability to retain the prosthesis and facilitate easy retrievability.
37
Nicholson, John W., Sharanbir K. Sidhu, and Beata Czarnecka. "Enhancing the Mechanical Properties of Glass-Ionomer Dental Cements: A Review." Materials 13, no. 11 (May 31, 2020): 2510. http://dx.doi.org/10.3390/ma13112510.
Full textAbstract:
This paper reviews the strategies that have been reported in the literature to attempt to reinforce glass-ionomer dental cements, both conventional and resin-modified. These cements are widely used in current clinical practice, but their use is limited to regions where loading is not high. Reinforcement might extend these applications, particularly to the posterior dentition. A variety of strategies have been identified, including the use of fibres, nanoparticles, and larger particle additives. One problem revealed by the literature survey is the limited extent to which researchers have used International Standard test methods. This makes comparison of results very difficult. However, it does seem possible to draw conclusions from this substantial body of work and these are (1) that powders with conventional particle sizes do not reinforce glass-ionomer cements, (2) certain fibres and certain nanoparticles give distinct improvements in strength, and (3) in the case of the nanoparticles these improvements are associated with differences in the morphology of the cement matrix, in particular, a reduction in the porosity. Despite these improvements, none of the developments has yet been translated into clinical use.
38
Natascha Douat Hannegraf, Maria Eduarda Schultze Mendes Ribeiro, Célia Maria Condeixa de França Lopes, and Flares Baratto-Filho. "Effect of heat on the hardness of glass carbomer cement used in atraumatic restorative treatment." RSBO 17, no. 1 (June 30, 2020): 6–11. http://dx.doi.org/10.21726/rsbo.v17i1.273.
Full textAbstract:
This study aimed to evaluate the effect of heat treatment on the microhardness of two glass ionomer cements: EQUIA Forte (GC Corporation) and GCP Glass Fill (GCPDental). Material and methods: Twenty specimens of the two glass ionomer cements were prepared following the manufacturer’s instructions, and 10 specimens of each material received heat treatment with a light curing unit (Carbo LED lamp, GCP-Dental). After seven days of storage in distilled water at room temperature (23°C), the 40 specimens were submitted for Vickers microhardness test (microhardness HMV 2T). Five indentations were performed on each specimen with a load of 100g, with a 10 second penetration time. Results: For both materials, the average microhardness value were higher in the groups that did not undergo heat treatment, the group presenting with the highest microhardness value was EQUIA Forte (GC Corporation) without heat treatment (125.3), and the lowest value was found for GCP Glass Fill (GCP-Dental) with heat treatment (72.9). Conclusion: The heat treatment had no influence on the microhardness of the glass ionomer cements tested.
39
Daou, Maha, Bruno Tavernier, and Jean-Marc Meyer. "Two-Year Clinical Evaluation of Three Restorative Materials in Primary Molars." Journal of Clinical Pediatric Dentistry 34, no. 1 (September 1, 2009): 53–58. http://dx.doi.org/10.17796/jcpd.34.1.h4p6141065388h0h.
Full textAbstract:
A variety of alternatives to amalgam are now available for use in Class I and Class II restorations in primary teeth, including glass ionomer cements, compomers and resin modified glass ionomer cements(RMGIC). Objectives: This study evaluated the two-year clinical performance of three restorative dental materials: A resin modified glass ionomer cement (Fuji IILC), a compomer (Dyract AP) and a high viscosity glass ionomer cement (Fuji IX), in primary molars of pediatric patients with high caries risk activity and compared these results to those reported for amalgam restorations. Study design: One hundred and forty nine Class I and Class II cavities in 45 patients aged 6 to 8 years were restored with compomer, glass ionomer cements and amalgam. Restorations were evaluated according to modified Ryge criteria by two examiners at baseline, and after 6, 12, 18 and 24 months of oral function. The data was submitted to statistical analysis (binomial and hyper geometric tests, p<0.05). Results: Two-year recall rate was 62.42%. Class I performed better than class II restorations. The difference in marginal discoloration between compomer and amalgam restorations was statistically significant (p=0.014). No other significant differences were found between GIC, compomer and amalgam restorations. The clinical performance of the three restorative materials compared to amalgam in Class I and Class II cavities at two-year recall was acceptable.Conclusions: The results, even in a population with high caries risk activity, suggest that these materials are suitable alternatives to amalgam in Class I and Class II restorations in primary teeth.
40
Caldeira, Érika Machado, Antonio de Moraes Izquierdo, Felipe Giacomet, Eduardo Franzotti Sant'Anna, and Antônio Carlos de Oliveira Ruellas. "The influence of protective varnish on the integrity of orthodontic cements." Dental Press Journal of Orthodontics 18, no. 6 (December 2013): 45–50. http://dx.doi.org/10.1590/s2176-94512013000600008.
Full textAbstract:
OBJECTIVE: The aim of the present study was to assess the influence of saliva contamination over the structural strength and integrity of conventional glass-ionomer cements used for cementing orthodontic bands in the absence and presence of a surface-protecting varnish. METHOD: 48 samples were prepared by inserting 3 types of glass-ionomer cements into standardized metallic matrixes of 10 mm of diameter and 2 mm of depth. The cements used were: Meron (VOCO), Ketac-Cem (3M ESPE) and Vidrion C (DFL), all of which comprised groups A, B and C, respectively. Subgroups A1, B1 and C1 comprised samples with no surface protection, whereas subgroups A2, B2 and C2 comprised samples of which surface was coated with Cavitine varnish (SS White), after cement manipulation and application, in order to protect the cement applied. All samples were stored in artificial saliva for 24 hours at 37ºC. A Vickers diamond micro-durometer was used to produce indentations on the non-treated group (non-varnished) and the treated group (varnished). RESULTS: Varnished materials had significantly higher microhardness values in comparison to non-varnished materials. Ketac-Cem had the highest microhardness value among the varnished materials. CONCLUSION: Varnish application is necessary to preserve the cement and avoid enamel decalcification. Glass-ionomer cements should be protected in order to fully keep their properties, thus, contributing to dental health during orthodontic treatment.
41
Arnold, Samantha, Glynn D. Buchanan, Nichola Warren, and N. Potgieter. "Comparison of capsule-mixed versus hand-mixed glass ionomer cements Part II: Porosity." South African Dental Journal 77, no. 02 (March 31, 2022): 65–72. http://dx.doi.org/10.17159/2519-0105/2022/v77no2a2.
Full textAbstract:
Glass ionomer restorative cements (GIC) are routinely used in dental practice. During mixing, air incorporation may lead to higher porosity with subsequent weakening of the cement. The degree of porosity will determine whether capsule-mixed or hand-mixed GIC are mechanically stronger for clinical use. To compare the porosity of four commercially available dental glass ionomer cements, supplied in both hand mix and capsule-mix formulations, by evaluating number of voids (%), total volume of voids (mm3 ) and volume percentage of voids (%). Eighty samples were manufactured from hand-mixed GIC: Riva Self Cure; Fuji IX GP ; Ketac Universal, Ketac Molar Easymix, and equivalent capsule-mixed GIC: Riva Self Cure; Fuji IX GP ; Ketac Universal Aplicap and Ketac Molar Aplicap. Micro-CT scanning was used to evaluate porosity. The number of voids (mm3 ), total volume of voids (mm3 ) and the volume percentage of voids (%) were calculated.
42
Hurrell-Gillingham, K., Ian M. Reaney, I. M. Brook, and P. V. Hatton. "Novel Fe2O3-Containing Glass Ionomer Cements: Glass Characterisation." Key Engineering Materials 284-286 (April 2005): 799–802. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.799.
Full textAbstract:
Glass-ionomer cements (GIC) have been used in dentistry for over 30 years. In the past ten years they have also been developed for use as medical grade bone cements. However, concerns have been raised over the biocompatibility of GIC’s in non-dental applications. The release of Al3+ ions from the cement has been related to localized poor bone mineralisation and neurotoxicity. There is a need therefore to develop Al2O3-free cements. One potential route is the substitution of Al2O3 with Fe2O3 in the glass. An Fe2O3-based glass for use in GIC‘s was fabricated. The glass was found to differ considerably compared to the traditional amorphous Al2O3-based glasses. XRD demonstrated a highly crystalline morphology containing magnetite and apatite which was confirmed using electron microscopy. It was predicted that the reduction in Al concentration in the glass would improve the biocompatibility of the resulting cement.
43
Freire, Waldênia P., Marcus Vinícius Lia Fook, Emilly F. Barbosa, Camila S. Araújo, Rossemberg C. Barbosa, and Wladymyr J. B. de Sousa. "Glass Ionomer Cement – Development and Characterization Microstructural." Materials Science Forum 805 (September 2014): 12–18. http://dx.doi.org/10.4028/www.scientific.net/msf.805.12.
Full textAbstract:
The Glass Ionomers Cements (GICs) are materials widely used in dentistry, have advantages such as fluoride release and chemical adhesion to the dental substrate. They are recommended as a restorative material, luting agent in prosthetic dentistry and also in medicine. However, there is need for developing new bone cements as an alternative or replacement to the current polymethylmethacrylate cements, therefore, the objective of this research was to develop an experimental GIC and characterization regarding morphology, chemical composition and crystallinity. This composite was characterized by X-ray diffraction (XRD), Infrared Spectroscopy Fourier Transform (FTIR) and optical microscopy (OM). For comparative study, was used the GIC Vidrion R (SS White) in the control group. These cements are presented in semi-crystalline diffraction patterns, the FTIR spectra observed characteristic bands of these materials and microstructural study of the cements showed homogeneous distribution of filler in the polymer matrix, corroborating with the literature.
44
Lohbauer, Ulrich, Roland Frankenberger, Alexis Clare, Anselm Petschelt, and Peter Greil. "Toughening of dental glass ionomer cements with reactive glass fibres." Biomaterials 25, no. 22 (October 2004): 5217–25. http://dx.doi.org/10.1016/j.biomaterials.2003.12.027.
Full text
45
Mallmann, André, Jane Clei Oliveira Ataíde, Rosa Amoedo, Paulo Vicente Rocha, and Letícia Borges Jacques. "Compressive strength of glass ionomer cements using different specimen dimensions." Brazilian Oral Research 21, no. 3 (September 2007): 204–8. http://dx.doi.org/10.1590/s1806-83242007000300003.
Full textAbstract:
The purpose of this study was to evaluate the compressive strength of two glass ionomer cements, a conventional one (Vitro Fil® - DFL) and a resin-modified material (Vitro Fil LC® - DFL), using two test specimen dimensions: One with 6 mm in height and 4 mm in diameter and the other with 12 mm in height and 6 mm in diameter, according to the ISO 7489:1986 specification and the ANSI/ADA Specification No. 66 for Dental Glass Ionomer Cement, respectively. Ten specimens were fabricated with each material and for each size, in a total of 40 specimens. They were stored in distilled water for 24 hours and then subjected to a compressive strength test in a universal testing machine (EMIC), at a crosshead speed of 0.5 mm/min. The data were statistically analyzed using the Kruskal-Wallis test (5%). Mean compressive strength values (MPa) were: 54.00 ± 6.6 and 105.10 ± 17.3 for the 12 mm x 6 mm sample using Vitro Fil and Vitro Fil LC, respectively, and 46.00 ± 3.8 and 91.10 ± 8.2 for the 6 mm x 4 mm sample using Vitro Fil and Vitro Fil LC, respectively. The resin-modified glass ionomer cement obtained the best results, irrespective of specimen dimensions. For both glass ionomer materials, the 12 mm x 6 mm matrix led to higher compressive strength results than the 6 mm x 4 mm matrix. A higher variability in results was observed when the glass ionomer cements were used in the larger matrices.
46
Elibol, Cagatay, Ender Göksen Atalay, Kadir Sagir, and Afife Binnaz Hazar Yoruc. "Effect of water absorption and hydroxyapatite addition on mechanical and microstructural properties of dental luting cements." Materials Testing 64, no. 3 (March 1, 2022): 303–13. http://dx.doi.org/10.1515/mt-2021-2150.
Full textAbstract:
Abstract In recent years, dental cements have gained more and more importance due to the increasing clinical expectations. They are used as restorative materials and as materials providing critical functions such as chemical and physical adhesion in restorations and protective lining in the cavity. In this work, the effect of water absorption on the mechanical and microstructural properties of different commercial dental cements is systematically investigated. Furthermore, the effect of addition of biocompatible hydroxyapatite on the mechanical and microstructural properties of the cements is characterized. The results show that Voco Meron containing glass ionomer provides the highest values in water absorption and volume change tests. Ketac Cem Radiopaque (209 HV) containing glass ionomer exhibits the highest hardness increase after immersion for 28 days in water, whereas the highest water uptake value is observed in Adhesor Carbofine cement containing zinc polycarboxylate. The hardness of Adhesor ZincPhospate increases with increasing content of hydroxyapatite, whereas in Ketac Cem Radiopaque, the hardness decreases with increasing content of hydroxyapatite significantly. Test results are verified by microstructural analysis of different types of dental cements using scanning electron microscopy and the effect of particle size/distribution on the properties that are of crucial clinical importance is characterized in detail.
47
Saran, Runki, Nagraj P. Upadhya, Kishore Ginjupalli, Arul Amalan, Bharath Rao, and Saurabh Kumar. "Effect on Physical and Mechanical Properties of Conventional Glass Ionomer Luting Cements by Incorporation of All-Ceramic Additives: An In Vitro Study." International Journal of Dentistry 2020 (September 30, 2020): 1–9. http://dx.doi.org/10.1155/2020/8896225.
Full textAbstract:
Introduction. Glass ionomer cements (GICs) are commonly used for cementation of indirect restorations. However, one of their main drawbacks is their inferior mechanical properties. Aim. Compositional modification of conventional glass ionomer luting cements by incorporating two types of all-ceramic powders in varying concentrations and evaluation of their film thickness, setting time, and strength. Material & Methods. Experimental GICs were prepared by adding different concentrations of two all-ceramic powders (5%, 10, and 15% by weight) to the powder of the glass ionomer luting cements, and their setting time, film thickness, and compressive strength were determined. The Differential Scanning Calorimetry analysis was done to evaluate the kinetics of the setting reaction of the samples. The average particle size of the all-ceramic and glass ionomer powders was determined with the help of a particle size analyzer. Results. A significant increase in strength was observed in experimental GICs containing 10% all-ceramic powders. The experimental GICs with 5% all-ceramic powders showed no improvement in strength, whereas those containing 15% all-ceramic powders exhibited a marked decrease in strength. Setting time of all experimental GICs progressively increased with increasing concentration of all-ceramic powders. Film thickness of all experimental GICs was much higher than the recommended value for clinical application. Conclusion. 10% concentration of the two all-ceramic powders can be regarded as the optimal concentration for enhancing the glass ionomer luting cements’ strength. There was a significant increase in the setting time at this concentration, but it was within the limit specified by ISO 9917–1:2007 specifications for powder/liquid acid-base dental cements. Reducing the particle size of the all-ceramic powders may help in decreasing the film thickness, which is an essential parameter for the clinical performance of any luting cement.
48
Lehmann, Anna, Kacper Nijakowski, Michalina Nowakowska, Patryk Woś, Maria Misiaszek, and Anna Surdacka. "Influence of Selected Restorative Materials on the Environmental pH: In Vitro Comparative Study." Applied Sciences 11, no. 24 (December 16, 2021): 11975. http://dx.doi.org/10.3390/app112411975.
Full textAbstract:
In dental caries treatment, it is worth using such restorative materials that may limit plaque accumulation. The pH of the filling seems to be an important factor affecting the potential bacterial colonisation. Our study aimed to assess how selected restorative materials influence the environmental pH. A total of 150 specimens (30 of each: Ketac Molar, Riva LC, Riva SC, Filtek Bulk Fill, and Evetric) were placed in 100 sterile hermetic polyethene containers with saline and stored in 37 °C. The pH of each sample was measured using the electrode Halo HI13302 (Hanna Instruments, Poland) at specific points in time for 15 days. The initial pH levels were significantly lower for glass ionomer cements (3.9–4.7) compared to composites (5.9–6.0). With time, the pH increased for samples with glass ionomer cements (by nearly 1.5), whereas it decreased for samples with composites (maximally by 0.8). In the end, all materials were in the pH range between 5.3 and 6.0. The highest final pH was obtained with Ketac Molar at about 5.9. Double samples had lower pH values than single samples, irrespective of the type of material. In conclusion, immediately after application, restorative materials decreased the environmental pH, especially light-cured glass ionomer cements. For glass ionomers, within two weeks, the pH increased to levels comparable with composites.
49
Mayanagi, G., K. Igarashi, J. Washio, K. Nakajo, H. Domon-Tawaraya, and N. Takahashi. "Evaluation of pH at the Bacteria–Dental Cement Interface." Journal of Dental Research 90, no. 12 (September 20, 2011): 1446–50. http://dx.doi.org/10.1177/0022034511423392.
Full textAbstract:
Physiochemical assessment of the parasite-biomaterial interface is essential in the development of new biomaterials. The purpose of this study was to develop a method to evaluate pH at the bacteria-dental cement interface and to demonstrate physiochemical interaction at the interface. The experimental apparatus with a well (4.0 mm in diameter and 2.0 mm deep) was made of polymethyl methacrylate with dental cement or polymethyl methacrylate (control) at the bottom. Three representative dental cements (glass-ionomer, zinc phosphate, and zinc oxide-eugenol cements) were used. Each specimen was immersed in 2 mM potassium phosphate buffer for 10 min, 24 hrs, 1 wk, or 4 wks. The well was packed with Streptococcus mutans NCTC 10449, and a miniature pH electrode was placed at the interface between bacterial cells and dental cement. The pH was monitored after the addition of 1% glucose, and the fluoride contained in the cells was quantified. Glass-ionomer cement inhibited the bacteria-induced pH fall significantly compared with polymethyl methacrylate (control) at the interface (10 min, 5.16 ± 0.19 vs. 4.50 ± 0.07; 24 hrs, 5.20 ± 0.07 vs. 4.59 ± 0.11; 1 wk, 5.34 ± 0.14 vs. 4.57 ± 0.11; and 4 wks, 4.95 ± 0.27 vs. 4.40 ± 0.14), probably due to the fluoride released from the cement. This method could be useful for the assessment of pH at the parasite-biomaterial interface.
50
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.
Full textAbstract:
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