Effects of Incorporation of Marine Derived Hydroxyapatite on the Microhardness, Surface Roughness, and Fluoride Release of Two Glass-Ionomer Cements

Background: The aim of this study was to evaluate the effects of incorporation of hydroxyapatite (HA) derived from cuttlefish bone on the microhardness, surface roughness (SR), and fluoride release (FR) of conventional cure, and resin-modified glass-ionomer cement. Methods: There were four groups for each tested material; experimental glass-ionomer were made by addition and of 2, 5, and 10 wt % HA respectively to conventional glass-ionomers Fuji II LC and Fuji IX GP Extra. One group was prepared without the addition of HA particles. For SR and microhardness measurements sectional Teflon molds (5 mm in diameter and 2 mm deep) were used to prepare 10 samples per group (n = 80). The samples were stored in distilled water at 37 °C for 7 days prior to testing. The SR was measured using a contact type profilometer and the microhardness was determined using a Vickers micro-hardness tester at a load of 980 g for 15 s. For FR measurements, there were six samples per group (n = 48), prepared in Teflon molds (8 mm in diameter and 2 mm deep). The FR was measured with an ionoselective electrode in triplicates after 24 h, 7 days, and 45 days. Statistical analysis was performed using one-way ANOVA with Tukey post-hoc test. Results and Conclusion: Microhardness values obtained for Fuji II modified with 10 wt % HA were significantly higher compared to the other two groups tested. Comparison of materials with respect to SR showed significant difference between them (p < 0.0001) with Fuji II and Fuji IX modified with HA having higher SR values. Regarding FR, Fuji IX showed statistically significant higher results than Fuji II, independently of HA modification, and groups modified with 2 and 5 wt % HA showed significantly increased fluoride release in all three time points.

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Effect of Vital Tooth Bleaching on Surface Roughness and Streptococcal Biofilm Formation on Direct Tooth-Colored Restorative Materials

Operative Dentistry ◽

10.2341/16-366-l ◽

2018 ◽

Vol 43 (1) ◽

pp. 51-59 ◽

Cited By ~ 3

Author(s):

I Wongpraparatana ◽

O Matangkasombut ◽

P Thanyasrisung ◽

M Panich

Keyword(s):

Surface Roughness ◽

Biofilm Formation ◽

Resin Composite ◽

Glass Ionomer Cement ◽

Tooth Bleaching ◽

Significant Difference ◽

Resin Modified Glass Ionomer ◽

Before And After ◽

The Mean ◽

Post Hoc

SUMMARY Objective: To compare the effect of simulated bleaching with a 10% carbamide peroxide (CP) or a 40% hydrogen peroxide (HP) system on surface roughness of resin composite and resin-modified glass ionomer cement (RMGI) and streptococcal biofilm formation on these surfaces. Methods and Materials: Streptococcus mutans , Streptococcus sanguinis , and trypticase soy broth control for 24 hours. Biofilm formation was quantified by crystal violet staining, and the structure was visualized by scanning electron microscopy. The differences between the mean changes in Ra between the 10% CP and 40% HP groups of each material were evaluated with an independent t -test. The quantity of biofilm formation on each material was analyzed with one-way analysis of variance with the post hoc Tukey test ( α =0.05).Specimens of nanofilled resin composite and RMGI (n=108 each) were randomly divided into three groups (n=36 each): no treatment control, 10% CP, and 40% HP. The surface roughness values (Ra) were measured before and after treatments. The specimens in each group were randomly divided into three subgroups (n=12) and incubated with Results: S. mutans biofilm formation, bleaching with 10% CP and 40% HP increased biofilm on both materials compared to controls. However, S. sanguinis biofilm formation was significantly higher on bleached resin composite but not on RMGI specimens.Surface roughness significantly increased after bleaching in all groups. There was no significant difference between the 10% CP and 40% HP groups of each material. For Conclusions: S. sanguinis biofilm on RMGI.Simulated bleaching with 10% CP or 40% HP increased both surface roughness and biofilm formation on resin composite and RMGI, except for

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Differences in the Amount of Fluoride Release among Fluoride-Releasing Cements

International Journal of Prosthodontics and Restorative Dentistry ◽

10.5005/jp-journals-10019-1111 ◽

2014 ◽

Vol 4 (3) ◽

pp. 78-81

Author(s):

Takayuki Ueda ◽

Kaoru Sakurai ◽

Takashi Koike ◽

Koichiro Ogami ◽

Mituhiro Yokomoto ◽

...

Keyword(s):

Artificial Saliva ◽

Glass Ionomer Cement ◽

Resin Cement ◽

Fluoride Ion ◽

Fluoride Release ◽

Glass Ionomer ◽

Ion Release ◽

Significant Difference ◽

Resin Modified Glass Ionomer ◽

Bonferroni Test

ABSTRACT Purpose The abutment teeth of removable partial dentures are susceptible to root surface caries and secondary caries, and such caries sometimes result in crown destruction. In particular, in aged patients, this risk increases due to age-associated gingival recession, periodontal disease, decreased amount of saliva, and inadequate brushing caused by decreased finger motor function. Fluoride-releasing materials may prevent such caries. In this study, we evaluated the amounts of fluoride release from various fluoride-releasing cements based on the amount of fluoride release into artificial saliva. Materials and methods In this study, the following three types of cement were used: Vitremer 2 Paste (3M Health Care: V2 hereafter) and Fuji Luting EX (GC: EX hereafter) as resin-modified glass-ionomer cements, and Clearfil SA Luting (Kuraray Medical: SA hereafter) as a fluoride-containing adhesive resin cement. Using the method indicated by the manufactures, 5 samples (diameter, 8 mm; thickness, 2 mm) for each type of cement were prepared. The samples were immersed in artificial saliva (5 ml) and left at room temperature. The artificial saliva used for immersion was replaced every 24 hours until 14 days after the initiation of immersion and every 48 hours thereafter until after 30 days. Fluoride release was measured in the immersion solution using a combination fluoride ion-selective electrode connected to an ion analyzer. For statistical analysis, one-way analysis of variance and the Bonferroni test were performed to compare the amount of fluoride ion release among the groups (? = 0.05). Results The cumulative amount of fluoride ion release 30 days after the initiation of immersion was the highest for V2 (363.6 ± 87.1 μg/mm2), followed in order by EX (115.6 ± 7.9 μg/mm2) and SA (57.4 ± 23.9 μg/mm2). Significant differences were observed even from 1 day after the initiation of immersion between V2 and EX as well as SA. Concerning daily changes, the amount of fluoride ion release after 1 day was the highest for each type of cement; it was the highest for V2 (89.8 ± 13.5 μg/mm2), followed by SA (35.9 ± 8.3 μg/mm2) and EX (34.3 ± 3.2 μg/mm2). The amount of release gradually decreased after 2 days or more. Significant differences were observed from 1 day after the initiation of immersion between V2 and EX as well as SA. A significant difference between EX and SA was present from 2 until 4 days after the initiation of immersion. Conclusion V2 as a resin-modified glass-ionomer cement showed the highest amount of fluoride release, indicating continuous sustained fluoride release. How to cite this article Ogami K, Yokomoto M, Koike T, Ueda T, Tomura K, Sakurai K. Differences in the Amount of Fluoride Release among Fluoride-Releasing Cements. Int J Prosthodont Restor Dent 2014;4(3):78-81.

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Effect of one-bottle adhesive systems on the fluoride release of a resin-modified glass ionomer

Journal of Applied Oral Science ◽

10.1590/s1678-77572004000100003 ◽

2004 ◽

Vol 12 (1) ◽

pp. 12-17 ◽

Cited By ~ 1

Author(s):

Linda Wang ◽

Marília Afonso Rabelo Buzalaf ◽

Maria Teresa Atta

Keyword(s):

Statistical Difference ◽

Glass Ionomer Cement ◽

Adhesive System ◽

Fluoride Release ◽

Glass Ionomer Cements ◽

Glass Ionomer ◽

Adhesive Systems ◽

Resin Modified Glass Ionomer ◽

The One ◽

In The Beginning

A dhesive systems associated to resin-modified glass ionomer cements are employed for the achievement of a higher bond strength to dentin. Despite this benefit, other properties should not be damaged. This study aimed at evaluating the short-time fluoride release of a resin-modified glass ionomer cement coated with two one-bottle adhesive systems in a pH cycling system. Four combinations were investigated: G1: Vitremer (V); G2: Vitremer + Primer (VP); G3: Vitremer + Single Bond (VSB) and G4: Vitremer + Prime & Bond 2.1 (VPB). SB is a fluoride-free and PB is a fluoride-containing system. After preparation of the Vitremer specimens, two coats of the selected adhesive system were carefully applied and light-cured. Specimens were immersed in demineralizing solution for 6 hours followed by immersion in remineralizing solution for 18 hours, totalizing the 15-day cycle. All groups released fluoride in a similar pattern, with a greater release in the beginning and decreasing with time. VP showed the greatest fluoride release, followed by V, with no statistical difference. VSB and VPB released less fluoride compared to V and VP, with statistical difference. Regardless the one-bottle adhesive system, application of coating decreased the fluoride release from the resin-modified glass ionomer cements. This suggests that this combination would reduce the beneficial effect of the restorative material to the walls around the restoration.

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Efficiency of Amorphous Calcium Phosphate–Containing Orthodontic Composite and Resin Modified Glass Ionomer on Demineralization Evaluated By a New Laser Fluorescence Device

European Journal of Dentistry ◽

10.1055/s-0039-1697419 ◽

2009 ◽

Vol 03 (02) ◽

pp. 127-134 ◽

Cited By ~ 18

Author(s):

Tancan Uysal ◽

Mihri Amasyali ◽

Alp Erdin Koyuturk ◽

Deniz Sagdic

Keyword(s):

Calcium Phosphate ◽

Amorphous Calcium Phosphate ◽

Glass Ionomer Cement ◽

Laser Fluorescence ◽

Orthodontic Brackets ◽

Glass Ionomer ◽

Enamel Demineralization ◽

Significant Difference ◽

Resin Modified Glass Ionomer

ABSTRACTObjectives: The aim of this in vitro study was to compare the efficacy of Amorphous Calcium Phosphate (ACP)-containing orthodontic composite and resin-modified glass ionomer cement (RMGIC) on enamel demineralization adjacent to orthodontic brackets evaluated by a new laser fluorescence device.Methods: Sixty extracted maxillary premolars were used in the present study. Twenty orthodontic brackets were bonded with ACP-containing orthodontic adhesive (Aegis-Ortho), 20 were bonded with RMGIC (Fuji Ortho LC) ad20 were bonded with Transbond XT composite as the control. All samples were then cycled for 21 days through a daily procedure of demineralization for 6 hours and remineralization for 17 hours. After this procedure, demineralization evaluations were undertaken by a pen-type laser fluorescence device (DIAGNO-dent Pen). Analysis ofvariance (ANOVA) and Tukey test was used for statistical evaluation, at P<.05 level.Results: According to ANOVA, significant demineralization variations (ΔD) were determined among groups (F=6.650; P<.01). The ACP-containing composite showed the lowest (mean: 8.98±2.38) and the control composite showed the highest (mean:12.15±3.83) ΔD, during 21 days demineralization process (P<.01). Significant difference was also observed between the ΔD scores of the RMGIC (mean: 9.24±2.73) and control (P<.05).No significant differences was found in preventive effects of ACP-containing composite and RMGIC (P<.05) against demineralization.Conclusions: The use of both ACP-containing orthodontic composite and RMGIC should be recommended for any at-risk orthodontic patient to provide preventive actions and potentially remineralize subclinical enamel demineralization. (Eur J Dent 2009;3:127-134)

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Properties of New Glass-Ionomer Restorative Systems Marketed for Stress-Bearing Areas

Operative Dentistry ◽

10.2341/18-176-l ◽

2020 ◽

Vol 45 (1) ◽

pp. 104-110 ◽

Cited By ~ 1

Author(s):

D Fuhrmann ◽

D Murchison ◽

S Whipple ◽

K Vandewalle

Keyword(s):

Fracture Toughness ◽

Composite Resin ◽

Testing Machine ◽

Surface Hardness ◽

Glass Ionomer ◽

Hardness Tester ◽

Resin Coating ◽

Significant Difference ◽

Restorative Materials ◽

Post Hoc

SUMMARY Objectives: The purpose of this study was to evaluate the properties (fracture toughness, surface hardness) of newer conventional glass-ionomer restorative materials that are marketed for posterior stress-bearing areas compared with more traditional glass-ionomer restorative materials marketed for non–load-bearing areas and composite-resin restorative materials. Methods and Materials: Notched-beam fracture toughness specimens were created in a mold with each tested material (Equia Forte, GC America, with and without a surface coating of Equia Forte Coat; Ketac Universal, 3M/ESPE; ChemFil Rock, Dentsply; Fuji IX GP Extra, GC; Ionostar Molar, VOCO; Filtek Z250, 3M/ESPE; Filtek Supreme Ultra, 3M/ESPE) and fractured using a universal testing machine after 24 hours of storage. Hardness values were determined on the surface of the fracture toughness specimens using a hardness tester. Data were analyzed with a one-way ANOVA and Tukey's post hoc test per property (alpha=0.05). Results: The composite-resin restorative materials had significantly greater fracture toughness than the glass-ionomer materials. There was no significant difference in fracture toughness between the glass-ionomer materials. The use of a resin coating significantly increased the surface hardness of the newer glass ionomer marketed for stress-bearing areas. Conclusions: Fracture toughness was not improved with the newer glass-ionomer restorative materials marketed for stress-bearing areas compared to the conventional glass-ionomer materials, however a resin coating provided greater surface hardness.

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Effects of extraction media upon fluoride release from a resin-modified glass-ionomer cement

Clinical Oral Investigations ◽

10.1007/s007840050060 ◽

1998 ◽

Vol 2 (3) ◽

pp. 143-146 ◽

Cited By ~ 12

Author(s):

W. Geurtsen ◽

P. Bubeck ◽

G. Leyhausen ◽

F. Garcia-Godoy

Keyword(s):

Glass Ionomer Cement ◽

Fluoride Release ◽

Glass Ionomer ◽

Resin Modified Glass Ionomer ◽

Ionomer Cement

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Glass Ionomer Cements can be used for Bonding Orthodontic Brackets After Cancer Radiation Treatment?

Brazilian Dental Journal ◽

10.1590/0103-6440201801436 ◽

2018 ◽

Vol 29 (2) ◽

pp. 128-132 ◽

Cited By ~ 1

Author(s):

Gabriela Cristina Santin ◽

Alexandra Mussolino de Queiroz ◽

Regina Guenka Palma-Dibb ◽

Harley Francisco de Oliveira ◽

Paulo Nelson Filho ◽

...

Keyword(s):

Bond Strength ◽

Shear Bond Strength ◽

Glass Ionomer Cement ◽

Enamel Surface ◽

Orthodontic Brackets ◽

Glass Ionomer ◽

Clinical Practices ◽

Significant Difference ◽

Resin Modified Glass Ionomer ◽

Ionomer Cement

Abstract Patients undergoing radiotherapy treatment present more susceptibility to dental caries and the use of an orthodontic device increases this risk factor due to biofilm accumulation around the brackets. The objective of this study was to evaluate the shear bond strength to irradiated permanent teeth of orthodontic brackets bonded with conventional glass ionomer cement and resin-modified glass ionomer cement due to the fluoride release capacity of these materials. Ninety prepared human premolars were divided into 6 groups (n=15), according to the bonding material and use or not of radiation: CR: Transbond XT composite resin; RMGIC: Fuji Ortho LC conventional glass ionomer cement; GIC: Ketac Cem Easymix resin-modified glass ionomer cement. The groups were irradiated (I) or non-irradiated (NI) prior to bracket bonding. The specimens were subjected to a fractioned radiation dose of 2 Gy over 5 consecutive days for 6 weeks. After the radiotherapy, the brackets were bonded on the specimens with Transbond XT, Fuji Ortho LC and Ketac Cem Easymix. After 24 h, the specimens were subjected to shear bond strength test. The image of enamel surface (classified by Adhesive Remnant Index - ARI) was also evaluated and its frequency was checked among groups/subgroups. The shear bond strength variable was evaluated with ANOVA and Tukey’s post-hoc test. GIC group showed the lowest adhesion values among the groups (p<0.05). There was no statistically significant difference among non-irradiated and irradiated groups (p>0.05). As for the ARI, the CR-I group showed the highest material retention on enamel surface among the irradiated groups. RMGIC group showed the highest values for shear bond strength and presented ARI acceptable for clinical practices.

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Microleakage after Thermocycling of Three Self-Etch Adhesives under Resin-Modified Glass-Ionomer Cement Restorations

International Journal of Dentistry ◽

10.1155/2010/728453 ◽

2010 ◽

Vol 2010 ◽

pp. 1-6 ◽

Cited By ~ 8

Author(s):

Sabine O. Geerts ◽

Laurence Seidel ◽

Adelin I. Albert ◽

Audrey M. Gueders

Keyword(s):

Polyacrylic Acid ◽

Glass Ionomer Cement ◽

Adhesive System ◽

Glass Ionomer ◽

Class V ◽

Significant Difference ◽

Resin Modified Glass Ionomer ◽

One Step ◽

Self Etch ◽

Ionomer Cement

This study was designed to evaluate microleakage that appeared on Resin-Modified Glass-Ionomer Cement (RMGIC) restorations. Sixty class V cavities () were cut on thirty extracted third molars, which were randomly allocated to three experimental groups. All the buccal cavities were pretreated with polyacrylic acid, whereas the lingual cavities were treated with three one-step Self-Etch adhesives, respectively, Xeno III (Dentsply Detrey GmbH, Konstanz, Germany), iBond exp (Heraeus Kulzer gmbH & Co. KG, Hanau, Germany), and Adper Prompt-L-Pop (3M ESPE AG, Dental products Seefeld, Germany). All cavities were completely filled with RMGIC, teeth were thermocycled for 800 cycles, and leakage was evaluated. Results were expressed as means standard deviations (SDs). Microleakage scores were analysed by means of generalized linear mixed models (GLMMs) assuming an ordinal logistic link function. All results were considered to be significant at the 5% critical level (). The results showed that bonding RMGIC to dentin with a Self-Etch adhesive rather than using polyacrylic acid did not influence microleakage scores (), except for one tested Self-Etch adhesive, namely, Xeno III (). Nevertheless, our results did not show any significant difference between the three tested Self-Etch adhesive systems. In conclusion, the pretreatment of dentin with Self-Etch adhesive system, before RMGIC filling, seems to be an alternative to the conventional Dentin Conditioner for the clinicians as suggested by our results (thermocycling) and others (microtensile tests).

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Effect of cement types on the tensile strength of metallic crowns submitted to thermocycling

Brazilian Dental Journal ◽

10.1590/s0103-64402003000300010 ◽

2003 ◽

Vol 14 (3) ◽

pp. 193-196 ◽

Cited By ~ 2

Author(s):

Simonides Consani ◽

Julie Guzela dos Santos ◽

Lourenço Correr Sobrinho ◽

Mário Alexandre Coelho Sinhoreti ◽

Manoel Damião Sousa-Neto

Keyword(s):

Tensile Strength ◽

Zinc Phosphate ◽

Testing Machine ◽

Glass Ionomer Cement ◽

Tensile Load ◽

Resin Cement ◽

Glass Ionomer ◽

Significant Difference ◽

Resin Modified Glass Ionomer ◽

Ionomer Cement

The relationship between metallic cast crowns and tensile strength according to cement types submitted to thermocycling was studied. Seventy-two metallic crowns were cast with Verabond II Ni-Cr alloy and cemented in standardized preparations with 10º tapering. Three types of finishing line (45-degree chamfered, 20-degree bevel shoulder and right shoulder) were made with diamond burs on bovine teeth. Twenty-four metallic crowns in each group were randomly subdivided into three subgroups of 8 samples each according to the cement used: SS White zinc phosphate cement, Vitremer resin-modified glass ionomer cement, and Rely X resin cement and were submitted to thermocycling. Retention was evaluated according to tensile load required to displace the metallic cast crowns from tooth preparations with an Instron testing machine. ANOVA and Tukey's test showed a statistically significant difference among luting materials, with greater results for Rely X resin cement (24.9 kgf) followed by SS White zinc phosphate cement (13.3 kgf) and Vitremer resin-modified glass ionomer cement (10.1 kgf). The finishing line types did not influence the tensile resistance of the crowns fixed with the three cements. Increased tensile resistance of metallic crowns fixed on bovine teeth was obtained with resin cement, independent of the finishing line types.

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Ameloplasty is counterproductive in reducing microleakage around Resin Modified Glass Ionomer and Resin based fissure sealants

Pakistan Journal of Medical Sciences ◽

10.12669/pjms.36.3.1268 ◽

2020 ◽

Vol 36 (3) ◽

Author(s):

Tabinda Nawaz Khan ◽

Farhan Raza Khan ◽

Syed Yawar Ali Abidi

Keyword(s):

Glass Ionomer Cement ◽

Ordinal Scale ◽

P Value ◽

Glass Ionomer ◽

Fissure Sealants ◽

Human Teeth ◽

Fissure Sealant ◽

Significant Difference ◽

Resin Modified Glass Ionomer

Objective: To compare the microleakage around resin modified glass ionomer cement (RMGIC) based sealants and flowable resin based sealants placed with or without ameloplasty in extracted human teeth. Methods: This in-vitro experimental study was conducted at the Operative Dentistry Department, Dow University of Health Sciences, Karachi, Pakistan from June 2017 to December 2018. Sixty extracted human molars and premolars were assigned to four groups (n=15) each, according to the type of fissure sealant (flowable resin based sealant or resin modified glass ionomer based sealant) used and either placed with or without ameloplasty. Specimens were thermocycled and then immersed in 1% methylene blue for 24 hours. Specimens were then sectioned and examined using stereo-microscope (50X) for microleakage that was scored on an ordinal scale. Mann-Whitney U test and Ordinal regression were applied. Level of significance kept at 0.05. Results: There was a statistically significant difference (p-value <0.001) between the two sealant types for the microleakage scores. Sealants placed with ameloplasty demonstrated significantly higher microleakage values (p-value <0.001). Conclusion: Microleakage was found to be more pronounced in RMGIC based sealants compared to the resin based sealants. Ameloplasty resulted in higher leakage around the sealants irrespective of the chemistry of material. doi: https://doi.org/10.12669/pjms.36.3.1268 How to cite this:Khan TN, Khan FR, Abidi SYA. Ameloplasty is counterproductive in reducing microleakage around Resin Modified Glass Ionomer and Resin based fissure sealants. Pak J Med Sci. 2020;36(3):---------. doi: https://doi.org/10.12669/pjms.36.3.1268 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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