Research on the Mechanical Properties, Fluoride and Monomer Release of a New Experimental Flowable Giomer in Comparison to Three Commercial Flowable Giomers

Giomers are hybrid dental materials with controlled fluoride release properties. The aim of this study was to characterise a new experimental flowable giomer (G) in comparison to three commercial flowable giomers: Beautifil flow Plus X F00 (B-F00), Beautifil flow F02 (B-F02) and Beautifil flow Plus X F03 (B-F03), Shofu, Kyoto, Japan. The studied properties are fluoride ion release, residual monomers release and mechanical properties. The data analysis was performed using the ANOVA test and Tukey test for post hoc comparisons between groups. During the first day of the fluoride releasing measurement, the following classification resulted: B-F02 ˃ B-F03 ˃ B-F00 ˃ G and at the end of the investigation period, at 60 days: B-F02 ˃ B-F03 ˃ G ˃ B-F00. The experimental giomer released a lower percentage of total residual monomers than the commercial giomers. The highest value for the mechanical properties was recorded for the commercial giomers. The experimental giomer registered the lowest values for mechanical properties but higher than the imposed standard limit. There were statistically significant differences between the analyzed materials, in terms of fluoride releasing, residual monomer releasing and mechanical properties.

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Antimicrobial properties, mechanics, and fluoride release of ionomeric cements modified by red propolis

The Angle Orthodontist ◽

10.2319/083120-759.1 ◽

2021 ◽

Author(s):

Gêisa Aiane de Morais Sampaio ◽

Rogério Lacerda-Santos ◽

Yuri Wanderley Cavalcanti ◽

Gustavo Henrique Apolinário Vieira ◽

Cassiano Francisco Weege Nonaka ◽

...

Keyword(s):

Mechanical Properties ◽

Antimicrobial Activity ◽

Tensile Strength ◽

Compressive Strength ◽

Bond Strength ◽

Shear Bond Strength ◽

Fluoride Release ◽

Tukey Test ◽

Release Capacity ◽

Diametral Tensile Strength

ABSTRACT Objectives To evaluate the antimicrobial activity, mechanical properties, and fluoride release capacity of glass ionomer cement (GIC) used for cementing orthodontic bands and modified by ethanolic extract of red propolis (EERP) in different concentrations. Materials and Methods Two orthodontic GICs containing EERP at 10%, 25%, and 50%, were used. The following assays were carried out: cell viability tests against Streptococcus mutans and Candida albicans, diametral tensile strength, compressive strength, shear bond strength, microhardness, and fluoride release capacity. The statistical analyses of the antimicrobial tests, fluoride release, diametral tensile strength, compressive strength, and microhardness were performed using two-way analysis of variance and Tukey test (P < .05). Shear bond strength data were analyzed using one-way analysis of variance followed by Tukey test (P < .05). Results At the concentrations of 25% and 50%, EERP was shown to be a promising antimicrobial agent incorporated into GICs against C albicans (P < .001) and S mutans (P < .001). The fluoride release capacity of the GICs was not affected, and the EERP concentration of 25% was the one that least affected the mechanical properties of the cements (P > .05). Conclusions The GICs containing EERP at 25% showed a significant increase in their antimicrobial activity against S mutans and C albicans, while mechanical properties and fluoride release remained without significant changes.

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Evaluating the Mechanical Properties, and Calcium and Fluoride Release of Glass-Ionomer Cement Modified with Chicken Eggshell Powder

Dentistry Journal ◽

10.3390/dj6030040 ◽

2018 ◽

Vol 6 (3) ◽

pp. 40

Author(s):

Gehan Allam ◽

Ola Abd El-Geleel

Keyword(s):

Mechanical Properties ◽

Calcium Release ◽

Glass Ionomer Cement ◽

Fluoride Release ◽

Glass Ionomer ◽

Ion Release ◽

Chicken Eggshell ◽

Group A ◽

Group B ◽

Ionomer Cement

The aim of this study was to test the effect of adding chicken eggshell powder (CESP) to conventional glass-ionomer cement (GIC) on its mechanical properties, and fluoride and calcium release. CESP was added with proportions of 3% and 5% by weight to the powder component of conventional glass-ionomer cement. The specimens were categorized into group A: GIC without CESP; group B: GIC with 3% wt. CESP; and group C: GIC with 5% wt. CESP; there were 12 specimens in each group. Groups B and C showed higher compressive strength values compared to group A. However, microhardness scores were higher in group C compared to groups A and B. As for ion-release results, group B displayed the highest values of fluoride release followed by group C at both 7 and 30 days. Group C showed the highest amount of calcium release followed by both groups B and C at 7 days, while at 30 days, groups A and B showed higher calcium release compared to group C. The mechanical properties of conventional glass-ionomer restorative material were enhanced by the addition of CESP. Moreover, fluoride and calcium release were not compromised by adding CESP.

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Layered Double Hydroxide Fluoride Release in Dental Applications: A Systematic Review

Dentistry Journal ◽

10.3390/dj7030087 ◽

2019 ◽

Vol 7 (3) ◽

pp. 87 ◽

Cited By ~ 1

Author(s):

Agron Hoxha ◽

David G. Gillam ◽

Andy J. Bushby ◽

Amani Agha ◽

Mangala P. Patel

Keyword(s):

Systematic Review ◽

Dental Materials ◽

Fluoride Release ◽

Clinical Environment ◽

Ion Release ◽

Sulphur Compounds ◽

Ovid Medline ◽

Meta Analyses ◽

Double Hydroxides

This systematic review appraises studies conducted with layered double hydroxides (LDHs) for fluoride release in dentistry. LDH has been used as antacids, water purification in removing excess fluoride in drinking water and drug delivery. It has great potential for controlled fluoride release in dentistry, e.g., varnishes, fissure sealants and muco-adhesive strips, etc. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) Statement was followed with two reviewers performing a literature search using four databases: PubMed, Web of Science, Science Direct and Ovid Medline with no date restrictions. Studies including any LDH for ion/drug release in dentistry were included, while assessing the application of LDH and the value of the methodology, e.g., ion release protocol and the LDH production process. Results: A total of 258 articles were identified and four met the inclusion criteria. Based on two in vitro studies and one clinical study, LDH was previously studied in dental materials, such as dental composites and buccal muco-adhesive strips for fluoride release, with the latter studied in a clinical environment. The fourth study analysed LDH powder alone (without being incorporated into dental materials). It demonstrated fluoride release and the uptake of volatile sulphur compounds (VSC), which may reduce halitosis (malodour). Conclusion: LDHs incorporated in dental materials have been previously evaluated for fluoride release and proven to be clinically safe. LDHs have the potential to sustain a controlled release of fluoride (or other cariostatic ions) in the oral environment to prevent caries. However, further analyses of LDH compositions, and clinical research investigating any other cariostatic effects, are required.

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Comparative Evaluation of Mechanical Properties of Dental Nanomaterials

Journal of Nanomaterials ◽

10.1155/2017/6171578 ◽

2017 ◽

Vol 2017 ◽

pp. 1-8 ◽

Cited By ~ 5

Author(s):

Cem Peskersoy ◽

Osman Culha

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Modulus Of Elasticity ◽

Dental Materials ◽

Glass Ionomer ◽

Force Microscopy ◽

Atomic Force ◽

Post Hoc ◽

Dental Restorative ◽

One Way Anova

This study examines the properties of nanobased dental restorative materials with nanoindentation method in a precise, repeatable, and comparable way. Microhybrid and nanohybrid composites, conventional glass ionomer materials, and light cured nanoionomer materials were utilised for the study. Specimen discs (r=10 mm,h=2 mm) were prepared to test the hardness, modulus of elasticity, yield strength, and fracture toughness values for each sample in a nanoindentation device with an atomic force microscopy add-on (n=25). Comparative analyses were performed by one-way ANOVA and post hoc Tukey tests. The hardness and modulus of elasticity values of nanocomposite were higher (2.58 GPa and 32.86 GPa, resp.) than those of other dental materials. Although glass ionomer exhibited a hardness that was similar to a nanoionomer (0.81 versus 0.87 GPa), glass ionomer had the lowest fracture toughness value (Kc=0.83 MPa/mm0.5). The mechanical properties of resin composites improve with additional nanoscale fillers, unlike the glass ionomer material.

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Evaluation of mechanical properties of fluoride-releasing dental materials after multiple fluoride recharge/discharge application

Bioscience Journal ◽

10.14393/bj-v36n4a2020-47954 ◽

2020 ◽

Vol 36 (4) ◽

Cited By ~ 1

Author(s):

Burak Gümüştaş ◽

Elif Yaman Dosdoğru ◽

Sinan Güneysu

Keyword(s):

Mechanical Properties ◽

Flexural Strength ◽

Dental Materials ◽

Experimental Period ◽

Strength Properties ◽

Fluoride Release ◽

Glass Ionomer ◽

Resin Modified Glass Ionomer ◽

Mechanical And Physical Properties ◽

Restorative Materials

This study aimed to determine the mechanical properties of fluoride-releasing dental materials after an accelerated fluoride recharge/discharge procedure. Two fluoride-releasing glass ionomer types of cement (Ketac Molar Easymix and IonoStar Molar), a resin-modified glass ionomer (Photac Fil Quick Aplicap), and two compomers (Compoglass F and Glasiosite) were used in this study. A total of 30 rectangular specimens and 30 disk specimens of each material were prepared and placed in distilled/deionized water (n = 5). The amount of fluoride released was analyzed from the materials for 7-day discharge, 1st recharge, 7-day discharge, 2nd recharge, and 7-day discharge, and 3rd recharge. The de/pre- and post-recharge ﬂuoride release were measured using an ion chromatography for 24 days. The flexural strength and microhardness of each group were evaluated. The microhardness of all restorative materials showed no significant change (p > 0.05) over the experimental period. The flexural strength properties of the restorative materials did not change within the time of the study. The study showed that the fluoride release/uptake causes no effect on the mechanical and physical properties of dental materials.

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Calcium Silicate-Based Biocompatible Light-Curable Dental Material for Dental Pulpal Complex

Nanomaterials ◽

10.3390/nano11030596 ◽

2021 ◽

Vol 11 (3) ◽

pp. 596

Author(s):

Sung-Min Park ◽

Woo-Rim Rhee ◽

Kyu-Min Park ◽

Yu-Jin Kim ◽

Junyong Ahn ◽

...

Keyword(s):

Mechanical Properties ◽

Flexural Strength ◽

Calcium Ions ◽

Dental Materials ◽

Mineral Trioxide Aggregate ◽

Hardness Test ◽

Biological Properties ◽

Dental Material ◽

Ion Release ◽

Significant Difference

Dental caries causes tooth defects and clinical treatment is essential. To prevent further damage and protect healthy teeth, appropriate dental material is a need. However, the biocompatibility of dental material is needed to secure the oral environment. For this purpose, biocompatible materials were investigated for incorporated with dental capping material. Among them, nanomaterials are applied to dental materials to enhance their chemical, mechanical, and biological properties. This research aimed to study the physicochemical and mechanical properties and biocompatibility of a recently introduced light-curable mineral trioxide aggregate (MTA)-like material without bisphenol A-glycidyl methacrylate (Bis-GMA). To overcome the compromised mechanical properties in the absence of Bis-GMA, silica nanoparticles were synthesized and blended with a dental polymer for the formation of a nano-network. This material was compared with a conventional light-curable MTA-like material that contains Bis-GMA. Investigation of the physiochemical properties followed ISO 4049. Hydroxyl and calcium ion release from the materials was measured over 21 days. The Vickers hardness test and three-point flexural strength test were used to assess the mechanical properties. Specimens were immersed in solutions that mimicked human body plasma for seven days, and surface characteristics were analyzed. Biological properties were assessed by cytotoxicity and biomineralization tests. There was no significant difference between the tested materials with respect to overall physicochemical properties and released calcium ions. The newly produced material released more calcium ions on the third day, but 14 days later, the other material containing Bis-GMA released higher levels of calcium ions. The microhardness was reduced in a low pH environment, and differences between the specimens were observed. The flexural strength of the newly developed material was significantly higher, and different surface morphologies were detected. The recently produced extract showed higher cell viability at an extract concentration of 100%, while mineralization was clear at the conventional concentration of 25%. No significant changes in the physical properties between Bis-GMA incorporate material and nanoparticle incorporate materials.

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Influence of Different Percentages of Binders on the Physico-Mechanical Properties of Rhizophora spp. Particleboard as Natural-Based Tissue-Equivalent Phantom for Radiation Dosimetry Applications

Polymers ◽

10.3390/polym13111868 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1868

Author(s):

Siti Hajar Zuber ◽

Nurul Ab. Aziz Hashikin ◽

Mohd Fahmi Mohd Yusof ◽

Mohd Zahri Abdul Aziz ◽

Rokiah Hashim

Keyword(s):

Mechanical Properties ◽

Radiation Dosimetry ◽

Structural Integrity ◽

Soy Flour ◽

Lower Percentage ◽

Internal Bonding ◽

X Ray ◽

Tissue Equivalent ◽

Tissue Equivalent Phantom ◽

Edx Analyses

Rhizophora spp. particleboard with the incorporation of lignin and soy flour as binders were fabricated and the influence of different percentages of lignin and soy flour (0%, 6% and 12%) on the physico-mechanical properties of the particleboard were studied. The samples were characterised by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray fluorescence (XRF) and internal bonding. The results stipulated that the addition of binders in the fabrication of the particleboard did not change the functional groups according to the FTIR spectrum. For XRD, addition of binders did not reveal any major transformation within the composites. SEM and EDX analyses for all percentages of binders added showed no apparent disparity; however, it is important to note that the incorporation of binders allows better bonding between the molecules. In XRF analysis, lower percentage of chlorine in the adhesive-bonded samples may be advantageous in maintaining the natural properties of the particleboard. In internal bonding, increased internal bond strength in samples with binders may indicate better structural integrity and physico-mechanical strength. In conclusion, the incorporation of lignin and soy flour as binders may potentially strengthen and fortify the particleboard, thus, can be a reliable phantom in radiation dosimetry applications.

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Clay-based nanocomposite hydrogel with attractive mechanical properties and sustained bioactive ion release for bone defect repair

Journal of Materials Chemistry B ◽

10.1039/d1tb00184a ◽

2021 ◽

Author(s):

Xinyun Zhai ◽

Changshun Ruan ◽

Jie Shen ◽

Chuping Zheng ◽

Xiaoli Zhao ◽

...

Keyword(s):

Mechanical Properties ◽

Bone Defect ◽

Nanocomposite Hydrogel ◽

Ion Release ◽

Bone Defect Repair ◽

Defect Repair ◽

Gradual Release

Using nanoclay as the physical crosslinker, a novel clay-based nanocomposite hydrogel with attractive mechanical properties has be obtained, and the gradual release of intrinsic Mg2+ and Si4+ endows the system with excellent osteogenesis.

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Mechanical properties of dental restorative materials: relative contribution of laboratory tests

Journal of Applied Oral Science ◽

10.1590/s1678-77572003000300002 ◽

2003 ◽

Vol 11 (3) ◽

pp. 162-167 ◽

Cited By ~ 69

Author(s):

Linda Wang ◽

Paulo Henrique Perlatti D'Alpino ◽

Lawrence Gonzaga Lopes ◽

José Carlos Pereira

Keyword(s):

Mechanical Properties ◽

Laboratory Tests ◽

Clinical Performance ◽

Dental Materials ◽

Correct Selection ◽

Relative Contribution ◽

Dental Restorative Materials ◽

Restorative Materials ◽

Dental Restorative ◽

Selection Of

A wide variety of dental products that are launched on the market becomes the correct selection of these materials a difficult task. Although the mechanical properties do not necessarily represent their actual clinical performance, they are used to guide the effects of changes in their composition or processing on these properties. Also, these tests might help somehow the clinician to choose once comparisons between former formulations and new ones, as well as, with the leading brand, are highlighted by manufactures. This paper presents a review of the most important laboratory tests. In this manner, the knowledge of these tests will provide a critical opinion related to the properties of different dental materials.

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Characterization of NiCrMo Dental Restoration Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.875.373 ◽

2021 ◽

Vol 875 ◽

pp. 373-378

Author(s):

Ali Haider ◽

Omar Farooq Azam ◽

Muhammad Talha ◽

Saleem Akhtar

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

Dental Materials ◽

Dental Restoration ◽

Restorative Material ◽

Nicr Alloy ◽

In Vitro Biocompatibility ◽

Dental Prostheses ◽

Materials Used

Restorative material is a class of dental materials used for direct filling and fabrication of indirect restoration. NiCr alloy is a restorative material frequently used for dental prostheses due to its properties and economic reasons. In present work beryllium free NiCrMo alloy was developed and studied for dental restoration application. The alloy have unique characteristics of resistance to oxidation and biocompatibility; the requisites for dental prostheses. NiCrMo alloy is found to possess mechanical strength and fabrication properties suitable for dental repairs. In this study the developed alloy was tested for its mechanical properties, biocompatibility and corrosion resistance. An in-vitro biocompatibility study was carried out. No signs of toxicity and no signs of cell growth inhibition, in presence of NiCrMo alloy specimen, were observed. Mechanical properties and corrosion resistance are found in the range that is suitable for dental prostheses and easy fabrication.

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