The Effect of pH Cycling on Surface Microhardness and Fluoride Release of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities

Abdelaziz, Monaliza M.; Niazy, Maha A.; Taher, Hebaallah M.

doi:10.21608/adjg.2020.13538.1163

Cited by 4 publications

(5 citation statements)

References 19 publications

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“…All dogs were healthy and showed no clinical signs of dental disorder. (5) Research Ethics Committee of General Organization for Veterinary Services (Dokki) approved research on dogs at Veterinary Hospital (Abbasia) according to the following guidelines General Organization for Veterinary Services (no. 1396).…”

Section: Selection Of Dogsmentioning

confidence: 99%

“…Wastes were removed daily. Enclosures were cleaned daily and disinfected once a week (5) . After doing the experiment, dogs were euthanized, and the jaws were sectioned for obtaining the teeth after their decalcification.…”

Section: The Housing Of Dogsmentioning

confidence: 99%

“…Clay is a soft, loose, earthy substance with particles of a grain size of <4 μm. It forms due to the weathering and erosion of rocks containing the mineral group feldspar (known as the 'mother of clay') over vast periods (5) .…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Pulp Reaction of Nanoclay Modified Adhesive Systems Using Bulk Fill Resin Composite

Negm

Abi-Elhassan

Aliyu

et al. 2023

Dental Science Updates

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Introduction:Protecting the vital pulp in deep carious lesions possess a great challenge for clinicians in minimal invasive dentistry. Aim: To assess the pulp response to two montmorillonite modified adhesive systems (with and without organic modifier) in deep dentine cavities in dog's permanent posterior teeth. Materials and Methods: Six-healthy adult mongrel dogs were undergoing general anesthesia through intravenous injection of sodium pentobarbital; a rubber dam was fixed in place; cavities were prepared in labial surface of each tooth. Cavities were divided into three groups according to the restorative materials used: Group1: Prime&Bond universal TM adhesive (Control). Group2: Dellite®43B modified Adhesive system (with organic modifier). Group3: Dellite®LVF modified Adhesive system (without organic modifier). BulkFill material with Flowable consistency was used to fill the rest of the cavity over tested materials. Each group was subdivided into 3 equal subgroups at time intervals: after 1 week, 30 and 60 days. The study design was performed to obtain a total of 90 dogs' teeth, the number of samples for each material was n=7, and total number of samples in the six dogs for each material 42 teeth in each group, the best 30 teeth were examined. Differences between timepoints was evaluated by Friedman's test, and overall differences induced by groups, timepoints and interaction were assessed using two-way ANOVA. Results: There was no significant difference in pulp response of the conventional prime and bond adhesive system and Dellite43 modified adhesive. A significant difference between the two mentioned materials and Dellite LVF modified adhesive system. Conclusion: Organic modified montmorillonite adhesive produced favorable pulp response and seemed to be a promising biocompatible material comparable to conventional adhesive.

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Section: Selection Of Dogsmentioning

confidence: 99%

Section: The Housing Of Dogsmentioning

confidence: 99%

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Evaluation of Pulp Reaction of Nanoclay Modified Adhesive Systems Using Bulk Fill Resin Composite

Negm

Abi-Elhassan

Aliyu

et al. 2023

Dental Science Updates

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“…Integration of MMT in polymer matrix improves specifications of resulting compound compared to non-modified one. Recent studies that investigated the possibility of clays incorporation in restorative dentistry materials showed improved physical, mechanical and adhesive properties (11,12) . Nanoparticles are widely used as strengtheners in dental restorations because they have a noticeable effect on their performance when used in small amounts compared to micro fillers (13) .…”

Section: Introductionmentioning

confidence: 99%

Assessment of Montmorillonite Nanoclay-Modified Glass Ionomer Biocompatibility Focusing on Pulp Response

Abdelaziz

Kasem

Abdelwahed

et al. 2023

Egyptian Dental Journal

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Background and Aim: Incorporation of Montmorillonite (MMT) nanoclay in restorative materials improves their mechanical properties in addition to biocompatibility, yet little is known about effects of MMT nanoclay-modified glass ionomer on dental pulp. This study aimed to evaluate pulp response of MMT nanoclay-modified glass ionomer as viable biocompatible material compared to resin-modified and conventional in dog model. Material and methods:MMT nanoclay was characterized using X-ray Diffraction (XRD) and Fourier Transform Infra-Red Spectroscopy (FTIR). Class V cavities were prepared in 90 dogs' teeth and divided into 3 groups (n=30): G1: conventional, G2: MMT nanoclay-modified, and G3: resinmodified glass ionomer. Then the jaws were dissected and demineralized at three-time intervals of 7, 30 and 60 days to evaluate the pulp response of the extracted teeth of each group microscopically and statistically using Kruskal Wallis and Friedman tests.Results: MMT nanoclay-modified glass ionomer (G2) group at 7 days was associated with reduced signs of inflammation with lesser interstitial edema, marked thickening of collagen fibers, mild inflammatory cell infiltrate and less destruction of the odontoblastic layer compared to the other two groups. Further healing was observed with nanoclay group after 30 days with significantly reduced inflammation and promoted regeneration of the odontoblastic layer and pulp tissue to reach a normal histological pulp architecture by 60 days. Conclusion:MMT nanoclay-modified glass ionomer is a promising biocompatible material that shows favourable pulp response over both conventional and resin-modified.

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“…Accordingly, GIC specimens were soaked in a chemically prepared 5% acetic acid with pH 3, for 10 minutes twice a day, for 14 days to resemble the acidic challenge in the clinical situation. 27,28 Therefore, the aim of this invitro study was to evaluate the effect of calcium chloride application in both solution and gel forms on the surface hardness of the glass ionomer cement at baseline and after pH cycling.…”

mentioning

confidence: 99%

The effect of applying a new formulation of CaCl2 on surface hardness of conventional glass ionomer

Soliman,

Fahmy,

Tolidis

et al. 2023

Journal of Fundamental and Clinical Research

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Background: Glass ionomer cements (GIC) have excellent biocompatibility and fluoride release properties; however, they suffer from moisture sensitivity and low mechanical properties.Calcium chloride (CaCl2) in solution form improved the surface hardness of GIC. Some authors suggested the preparation of a new formulation of CaCl2 to be more stable in application. Surface hardness was measured at baseline and after the pH-cycling protocol. Aim of the study: To evaluate the effect of CaCl2 application in both solution and gel forms on the surface hardness of the GIC at baseline and after pH cycling. Materials and Methods: Thirty disc-shaped specimens were prepared from Fuji IX GIC and divided into three groups according to different surface treatments, (n=10); group 1 (control), group 2 (CaCl2 solution) and group 3 (CaCl2 in gel form). pH-cycling protocol was done for all specimens using 5% acetic acid (pH=3) twice /day, rinsed, dried and then stored in distilled water. This protocol was thus repeated for 14 days. Surface hardness was measured twice, at baseline and after pH-cycling. Results: At baseline and after pHcycling, the control group showed the lowest mean hardness. Two other CaCl2 gel and CaCl2 sol.showed insignificant differences between each other. pH-cycling resulted in a significant decrease in surface hardness in all groups compared to baseline. Conclusions: Both CaCl2 forms improved surface hardness of self-setting GICs. Yet, handling the gel-form was easier. pH-cycling protocol deteriorated the surface hardness values of all groups.

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The Effect of pH Cycling on Surface Microhardness and Fluoride Release of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities

Cited by 4 publications

References 19 publications

Evaluation of Pulp Reaction of Nanoclay Modified Adhesive Systems Using Bulk Fill Resin Composite

Evaluation of Pulp Reaction of Nanoclay Modified Adhesive Systems Using Bulk Fill Resin Composite

Assessment of Montmorillonite Nanoclay-Modified Glass Ionomer Biocompatibility Focusing on Pulp Response

The effect of applying a new formulation of CaCl2 on surface hardness of conventional glass ionomer

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