scholarly journals Influence of Selected Restorative Materials on the Environmental pH: In Vitro Comparative Study

2021 ◽  
Vol 11 (24) ◽  
pp. 11975
Author(s):  
Anna Lehmann ◽  
Kacper Nijakowski ◽  
Michalina Nowakowska ◽  
Patryk Woś ◽  
Maria Misiaszek ◽  
...  
Keyword(s):  
Dental Caries ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Bacterial Colonisation ◽  
Ph Values ◽  
Caries Treatment ◽  
Restorative Materials ◽  
Initial Ph ◽  
Ph Range

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.

Influence of Chemical Degradation on the Surface Properties of Nano Restorative Materials

2014 ◽  
Vol 39 (3) ◽  
pp. E109-E117 ◽  
Author(s):  
AB de Paula ◽  
SBP de Fúcio ◽  
RCB Alonso ◽  
GMB Ambrosano ◽  
RM Puppin-Rontani
Keyword(s):  
Orange Juice ◽  
Repeated Measures ◽  
Negative Impact ◽  
Artificial Saliva ◽  
Chemical Degradation ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Storage Media ◽  
Restorative Materials

SUMMARY Objectives The aim of this in vitro study was to investigate the effect of chemical degradation on the surface roughness (Ra) and hardness (Knoop hardness number [KHN]) of nano restorative materials. Methods Disc-shaped specimens (5-mm diameter; 2-mm thick) of Filtek Z350 and TPH Spectrum composites and the Vitremer and Ketac Nano light-curing glass ionomer cements were prepared according to the manufacturers' instructions. After 24 hours, polishing procedures were performed and initial measurements of Ra and KHN were taken. The specimens were divided into 12 groups (n=10) according to material and storage media: artificial saliva, orange juice, and Coca-Cola. After 30 days of storage, the specimens were reevaluated for Ra and KHN. The pH values of the storage media were measured weekly. Data were tested for significant differences by repeated-measures three-way analysis of variance and Tukey tests (p<0.05). Results Composites were found to present lower roughness values and higher hardness values than the ionomeric materials under all storage conditions. After degradation, the KHN of all experimental samples decreased significantly, while the Ra of the ionomeric materials increased, depending on the media, with a markedly negative impact of Coca-Cola and orange juice. There was no difference among the storage media for Filtek Z350 with regard to the KHN values. Nanofillers did not show any influence on the roughness and hardness of resin-modified glass ionomer cements and resin composites concerning their degradation resistance.

The Potential of a Bioactive, Pre-reacted, Glass-Ionomer Filler Resin Composite to Inhibit the Demineralization of Enamel in Vitro

2021 ◽  
Vol 46 (1) ◽  
pp. E11-E20
Author(s):  
IF Leão ◽  
N Araújo ◽  
CK Scotti ◽  
RFL Mondelli ◽  
MM de Amoêdo Campos Velo ◽  
...  
Keyword(s):  
Resin Composite ◽  
Surface Hardness ◽  
Composition Analysis ◽  
Glass Ionomer ◽  
Material Interface ◽  
Enamel Demineralization ◽  
Restorative Materials ◽  
Ph Cycling ◽  
Group B

Clinical Relevance A prereacted, glass-ionomer filler fluoride-containing resin composite had lower remineralization potential than glass-ionomer cements but was able to inhibit enamel demineralization; thus, it may be an option for restoring dental surfaces for patients at high risk of caries. SUMMARY Evidence is lacking on the use of surface prereacted glass-ionomer filler resin composites to inhibit demineralization and that simulate real clinical conditions. The present laboratory study evaluated the potential of such composites to prevent demineralization and quantified fluoride (F) and other ions released from restorative materials after a dynamic pH-cycling regimen applied to the tooth material interface in vitro. The pH-cycling regimen was assessed by measuring surface hardness (SH) along with energy dispersive X-ray spectroscopy (EDX). Methods and Materials: Ninety blocks of bovine enamel were subjected to composition analysis with EDX, and were further categorized based on SH. The blocks were randomly divided into 6 treatment groups (n=15 each): F IX (Fuji IX Extra; GC Corporation); IZ (Ion Z, FGM); F II (Fuji II LC, GC Corporation); B II (Beautifil II, Shofu); F250 (Filtek Z250 XT, 3M ESPE); and NT (control, no treatment). The blocks were subjected to a dynamic pH-cycling regimen at 37°C for 7 days concurrently with daily alternations of immersion in demineralizing/remineralizing solutions. EDX was conducted and a final SH was determined at standard distances from the restorative materials (150, 300, and 400 μm). Results: The EDX findings revealed a significant increase in F concentration and a decrease in Ca2+ in the enamel blocks of group B II after the pH-cycling regimen (p<0.05). SH values for groups F IX, IZ, and F II were greater than those for groups B II, F250, and NT at all distances from the materials. Conclusions: The results suggest that each of 3 restorative materials, F IX, IZ, and F II, partially inhibited enamel demineralization under a dynamic pH-cycling regimen.

scholarly journals Quantification of color variation of restorative materials used on pediatric dentistry after pigmentation

2015 ◽  
Vol 63 (4) ◽  
pp. 383-388
Author(s):  
Luísa Bandeira Pires Monteiro LOPES ◽  
Andreia Sofia Lopes de ARAÚJO ◽  
Virginia Barreiros MILAGRE
Keyword(s):  
Composite Resin ◽  
Color Change ◽  
Artificial Saliva ◽  
Pediatric Dentistry ◽  
Color Variation ◽  
Control Group ◽  
Chocolate Milk ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Restorative Materials

Objective: To quantify the color variation of two glass ionomer cements and a composite resin used in pediatric dentistry, after being immersed in different pigments agents. Methods: Using two glass ionomer cements (Ketac(tm) Molar and Photac(tm) Fil) and a microhybrid composite resin (Filtek(tm) z250), were produced 40 disks of each material (10 mm in diameter and 2 mm thick). The samples were soaked in artificial saliva (control group), coke, peach Ice Tea(r) and chocolate milk, for 72 hours in an oven at 37ºC. After this period, the samples were washed in 50 ml of distilled water. Finally, using the spectrophotometer, it was made the reading of results. The color change was measured according to the CIE L * a * b * system. Color changes were statistically analyzed using parametric one-way ANOVA and ANOVA with Welch correction, the nonparametric Kruskal-Wallis tests and post-hoc Tukey and Dunnet T3 with p≤ 0.05. Results: The immersion of restorative materials in different pigmentation agents caused a significant color variation on the samples. The agent who presented higher results was the Peach Ice Tea(r). The chocolate milk was the fluid with lowest pigmentation capacity of all restorative materials under study. The greater color variation was found on the Ketac(tm) Molar submerged in Coca-Cola(r) and the smallest on the Filtek(tm) z250 in chocolate milk. Conclusion: All restorative materials were shown to be susceptible to pigmentation by all agents. The Filtek(tm) z250 proved to have better color stability, followed by Photac(tm) Fil and finally by Ketac(tm) Molar.

scholarly journals Marginal Leakage of Endodontic Temporary Restorative Materials around Access Cavities Prepared with Pre-Endodontic Composite Build-Up: An In Vitro Study

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1700
Author(s):  
Atsushi Kameyama ◽  
Aoi Saito ◽  
Akiko Haruyama ◽  
Tomoaki Komada ◽  
Setsuko Sugiyama ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Resin Composite ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Restorative Material ◽  
Glass Ionomer ◽  
Zinc Oxide Eugenol ◽  
Restorative Materials ◽  
Ionomer Cement

This study aimed to examine the marginal seal between various commercial temporary restorative materials and exposed dentin/built-up composite. Sixty bovine incisors were cut above the cemento-enamel junction, and half of the dentin was removed to form a step, which was built up using flowable resin composite. The root canals were irrigated, filled with calcium hydroxide, and sealed using one of six temporary sealing materials (hydraulic temporary restorative material, temporary stopping material, zinc oxide eugenol cement, glass-ionomer cement, auto-cured resin-based temporary restorative material, and light-cured resin-based temporary restorative material) (n = 10 for each material). The samples were thermocycled 500 times and immersed in an aqueous solution of methylene blue. After 2 days, they were cut along the long axis of the tooth and the depth of dye penetration was measured at the dentin side and the built-up composite side. For the margins of the pre-endodontic resin composite build-up, the two resin-based temporary restorative materials showed excellent sealing. Hydraulic temporary restorative material had a moderate sealing effect, but the sealing effect of both zinc oxide eugenol cement and glass-ionomer cement was poorer.

An in vitro evaluation of bond strength of three glass ionomer cements

1990 ◽  
Vol 97 (4) ◽  
pp. 316-322 ◽  
Author(s):  
Valerie Bowser Fajen ◽  
Manville G. Duncanson ◽  
Ram S. Nanda ◽  
G. Frans Currier ◽  
Padmaraj V. Angolkar
Keyword(s):  
Bond Strength ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
In Vitro Evaluation

scholarly journals Bond Strength of Self-Adhesive Flowable Composites and Glass Ionomer Cements to Primary Teeth: A Systematic Review and Meta-Analysis of In Vitro Studies

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6694
Author(s):  
Flavia Iaculli ◽  
Alessandro Salucci ◽  
Gianni Di Giorgio ◽  
Valeria Luzzi ◽  
Gaetano Ierardo ◽  
...  
Keyword(s):  
Systematic Review ◽  
Bond Strength ◽  
Primary Teeth ◽  
Meta Analysis ◽  
Deciduous Teeth ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Significant Difference ◽  
Flowable Composites

Background: Conventional composites are largely used in pediatric restorative dentistry and demonstrate successful clinical outcomes. However, the need for simplification of operative steps in young or uncooperative children demands reliable alternatives. Therefore, the aim of the present systematic review and meta-analysis was to evaluate the in vitro bond strength of glass ionomer cements (GICs) and self-adhesive flowable composites (SFCs) on deciduous teeth. Methods: A comprehensive literature search according to the PRISMA checklist was manually and electronically performed by two independent reviewers through the following databases: MEDLINE/PubMed, Google Scholar, Scopus, and Embase, to include in vitro studies comparing GICs and SFCs bond strength values of restorations on primary teeth. In addition, three groups of meta-analyses were conducted using random-effects models. Results: Three articles meeting the inclusion criteria were selected and subjected to both qualitative and quantitative assessment. No statistically significant difference was found between SFC versus GIC; however, both groups significantly differed with conventional flowable composites (CFs). Conclusions: Despite the absence of significant difference in bond strength values, SFCs may be considered a valid alternative to GICs in the restoration of deciduous teeth, although CFs proved better in vitro performances.

scholarly journals Materiais Promissores para Melhorar as Propriedades Mecânicas e Físico-Químicas do Cimento de Ionômero de Vidro

2018 ◽  
Vol 19 (5) ◽  
pp. 104 ◽  
Author(s):  
M R R Silva ◽  
N J C Sena ◽  
D A Cunha ◽  
L C Souza ◽  
N S Rodrigues ◽  
...  
Keyword(s):  
Dental Materials ◽  
Dental Composite ◽  
Glass Ionomer Cements ◽  
Glass Ionomer

O objetivo deste trabalho é realizar uma revisão de literatura sobre os materiais que estão sendo associados ao cimento de ionômero de vidro (CIV), visando melhorar suas propriedades mecânicas e físico-químicas. Foi realizada uma seleção de artigos científicos nas bases de dados PubMed, Europe PMC e ScienceDirect, usando os descritores Glass Ionomer Cements, Dental Materials e Dental Composite. O critério de inclusão foi estudo in vitro acerca do tema proposto e os de exclusão foram revisões de literatura e estudos clínicos. Foram encontrados 130 artigos, publicados entre os anos de 2012 a 2017, dos quais foram selecionados 10. De acordo com esta revisão, o uso de substâncias naturais, tais como os nanocristais de celulose, melhorou a resistência à compressão e diametral, módulo de elasticidade e resistência ao desgaste do CIV. Já a associação com o propólis resultou na diminuição significativa da resistência à compressão e o aumento da solubilidade do CIV. O uso das nanopartículas de AlO, ZrO e TiO2 foi avaliado, mostrando redução da porosidade dos cimentos ionoméricos e aumento da resistência à compressão. Quando o Nanoclay (montmorillonita de grau polimérico) foi adicionado à porção líquida do CIV, suas propriedades mecânicas melhoraram, entretanto a resistência à tensão diametral não apresentou melhora estatística significante. Portanto, o uso de substâncias associadas ao CIV mostrou melhora de suas propriedades, principalmente quando os nanocristais de celulose foram utilizados, podendo representar um novo e promissor material de restauração dentária.Palavras-chave: Cimentos de Ionômeros de Vidro. Materiais Dentários. Propriedades Físicas e Químicas.

scholarly journals Influence of Luting Materials on the Retention of Cemented Implant-Supported Crowns: An In Vitro Study

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1853 ◽  
Author(s):  
Ella Naumova ◽  
Felix Roth ◽  
Berit Geis ◽  
Christine Baulig ◽  
Wolfgang Arnold ◽  
...  
Keyword(s):  
Artificial Saliva ◽  
In Vitro Study ◽  
Storage Conditions ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Cobalt Chromium ◽  
Retention Force ◽  
Implant Abutments ◽  
Aging Conditions

The retention force of cemented crowns on implant abutments with various luting materials was evaluated. Cobalt–chromium crowns were cemented onto tapered titanium abutments (Camlog) with eugenol-free temporary cement (RelyX TempBond NE), composite-based temporary cement (Bifix Temp), zinc phosphate cement (Harvard Cement), glass-ionomer cements (Meron, Fuji I), and resin-modified glass-ionomer cements (Fuji II, Fuji Plus, Ketac Cem Plus). Specimen aging via hydrostress was performed in artificial saliva at 37 °C for 14 days (S1), followed by hydrothermal stress with thermocycling (S2). The crowns were removed, and the force was recorded (T1). Subsequently, the crowns were recemented, aged, and removed, and the force was recorded (T2, T3). The retention forces differences were statistically significant according to the storage conditions at T1 (p = 0.002) and T3 (p = 0.0002). After aging (S1), Ketac Cem Plus had the highest retention force median value difference (T3 versus T1) (−773 N), whereas RelyX TempBond NE had the lowest (−146 N). After aging (S2), Meron had the highest retention force median value difference (−783 N), whereas RelyX TempBond NE had the lowest (−168 N). Recementation decreased the retention force of the implant-supported cobalt–chromium crowns cemented and recemented with the same luting materials. Luting materials (at T1) and aging conditions significantly impacted the retention force.

Sign in / Sign up

Export Citation Format

Share Document