Fluoride formed on enamel by fluoride varnish or gel application: A randomized controlled clinical trial

2021 ◽  
Author(s):  
Mauro Antonio Dall Agnol ◽  
Carla Battiston ◽  
Livia Maria Andalo Tenuta ◽  
Jaime Aparecido Cury
Keyword(s):  
Chemical Reactivity ◽  
Fluoride Concentration ◽  
Negative Control ◽  
Fluoride Varnish ◽  
Control Group ◽  
Controlled Clinical Trial ◽  
Dental Biofilm ◽  
Initial Application ◽  
Biofilm Fluid

Although fluoride varnish (FV) and acidulated phosphate fluoride gel (APF-gel) are considered clinically effective to reduce caries, in vitro studies have shown that FV reacts slowly with enamel because most NaF present in the formulation is not solubilized in the FV. Therefore, we conducted a clinical study to evaluate if the time that FV remains on dental surfaces could overcome its slower chemical reactivity when compared with APF-gel. Sixty-eight volunteers were randomly allocated into four groups: Negative control (Control, no treatment), APF -gel application (1.23% F applied for 4 min), and FV application (Duraphat®, 2.26 % F) for 4 h (FV-4h) or 24 h (FV-24h). To evaluate fluoride formed and retained on enamel, acid biopsies were made on the buccal surfaces of the maxillary central incisors before, at the end of the application of fluoride products (immediately after gel application, or after 4 or 24 h of varnish application) and after 7 and 28 days. Fluoride concentration in dental biofilm was also analyzed before and up to 28 days after initial application. The data were analyzed by 2-way ANOVA, considering treatment and time as factors. The APF-gel and FV-24h groups formed greater fluoride concentration on enamel than the FV-4h and the control group at the end of application (p=0.0001), with no difference from each other (p=0.99). The groups did not differ regarding fluoride in biofilm, fluid (p=0.73) and solids (0.40). In conclusion, fluoride varnish needs to remain in contact with the teeth for prolonged times (>4 h) to reach the same reactivity obtained by a 4-min application of APF-gel.

scholarly journals Comparison between Fluoride and Nano-hydroxyapatite in Remineralizing Initial Enamel Lesion: An in vitro Study

2018 ◽  
Vol 19 (3) ◽  
pp. 306-312 ◽  
Author(s):  
Issa Daas ◽  
Sherine Badr ◽  
Essam Osman
Keyword(s):  
Dental Fluorosis ◽  
Fluoride Concentration ◽  
Fluoride Varnish ◽  
Permanent Teeth ◽  
Control Group ◽  
Representative Specimen ◽  
Initial Caries ◽  
Significant Difference ◽  
Ph Cycling

ABSTRACT Aim The aim of this study was to compare the effectiveness of nano-hydroxyapatite (nano-HAP) paste and fluoride varnish in remineralizing initial enamel lesion in young permanent teeth and their ability to resist secondary caries under dynamic pH cycling quantitatively and qualitatively. Materials and methods Initial caries-like lesions were artificially developed on 45 specimens. Specimens were divided into three groups: (1) Control (without treatment), (2) fluoride varnish (3M ESPE), and (3) nano-HAP paste (Desensibilize Nano P). The nano-HAP paste was applied twice separated by one pH cycle, and the varnish was applied only once followed by 7 days of pH cycling. All specimens were examined using DIAGNOdent® pen (KaVo, Germany), and a representative specimen was randomly selected from each group for qualitative evaluation using scanning electron microscope (SEM) at four stages: Baseline, after lesion formation, immediately after remineralization, and after pH cycling. Data were statistically analyzed with Statistical Package for the Social Sciences (SPSS), version 20. Results The degree of demineralization was significantly elevated in control group; however, no significant difference was found between fluoride varnish group and nano-HAP paste group (p < 0.001). Conclusion Nano-HAP paste showed promising long-term protective effect in terms of surface depositions and maintaining a smooth surface compared with fluoride varnish. Clinical significance Based on the findings of this study, nano-HAP paste might be recommended as alternative remineralizing agent with lower fluoride concentration than fluoride varnish that could be beneficial for children, pregnant females, and those who are at high risk of dental fluorosis. How to cite this article Daas I, Badr S, Osman E. Comparison between Fluoride and Nano-hydroxyapatite in Remineralizing Initial Enamel Lesion: An in vitro Study. J Contemp Dent Pract 2018;19(3):306-312.

scholarly journals Genotoxic and Chemopreventive Effects of Vochysia divergens Leaves (Pantanal, Brazil)

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Pollyanna Francielli de Oliveira ◽  
Suzana Amorim Mendes ◽  
Nathália Oliveira Acésio ◽  
Luis Claudio Kellner Filho ◽  
Leticia Pereira Pimenta ◽  
...  
Keyword(s):  
Protective Effect ◽  
Skin Diseases ◽  
Chemical Constituents ◽  
Test System ◽  
Negative Control ◽  
Control Group ◽  
Xtt Assay ◽  
Vochysia Divergens

The medicinal plant Vochysia divergens is a colonizing tree species of the Pantanal, a unique and little explored wetland region in Brazil. This species is used in folk medicine as syrups and teas to treat respiratory infections, digestive disorders, asthma, scarring, and skin diseases. The objectives of this study were to evaluate the antioxidant, cytotoxic, and genotoxic potential of the ethanolic extract of Vochysia divergens leaves (VdE), as well as the influence of VdE and its major component (the flavone 3′,5-dimethoxy luteolin-7-O-β-glucopyranoside; 3′5 DL) on MMS-induced genotoxicity. The extract significantly reduced the viability of V79 cells in the colorimetric XTT assay at concentrations ≥ 39 μg/mL. A significant increase in micronucleus frequencies was observed in V79 cell cultures treated with VdE concentrations of 160 and 320 μg/mL. However, animals treated with the tested doses of VdE (500, 1000, and 2000 mg/kg b.w.) exhibited frequencies that did not differ significantly from those of the negative control group, indicating the absence of genotoxicity. The results also showed that VdE was effective in reducing MMS-induced genotoxicity at concentrations of 20, 40, and 80 μg/mL in the in vitro test system and at a dose of 15 mg/kg b.w. in the in vivo test system. Its major component 3′5 DL exerted no protective effect, suggesting that it is not responsible for the effect of the extract. The results of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay showed that VdE was able to scavenge 92.6% of free radicals. In conclusion, the results suggest that the protective effect of VdE may be related, at least in part, to the antioxidant activity of its chemical constituents.

scholarly journals Pengaruh Pemberian Ekstrak Teripang Pasir terhadap Hambatan Pertumbuhan Shigella Dysentriae Secara In Vitro

2020 ◽  
Vol 18 (1) ◽  
pp. 47
Author(s):  
FERIZAL NEGERI SAMUDRA ◽  
RETNO BUDIARTI ◽  
IRMAWATI IRMAWATI
Keyword(s):  
Sea Cucumber ◽  
Antibacterial Effect ◽  
Positive Control ◽  
Negative Control ◽  
Shigella Dysenteriae ◽  
Control Group ◽  
Control Groups ◽  
Shigella Spp ◽  
Diarrhea Disease

<p><strong>ABSTRACT</strong></p><p><strong>Background</strong>; In Indonesia, most diarrhea disease in 1995 to 2001 are caused by Shigella spp. Shigella spp infection can cause various symptom dan complication. Generally, the treatment by using antibiotic can cause antibiotic resistance. Sea cucumber (Holoturia scabra) is an herb that known, available, and easy to consume by society and has an antibacterial effect. Therefore, further research to study the effect of Holoturia Scabra on <em>Shigella Dysentriae</em> growth in vitro is needed.</p><p><strong>Objectives</strong>: The goal of this research is demonstrate the effect of sea cucumber (Holoturia scabra) to the growth of the <em>Shigella dysentriae</em> bacteria in vitro.</p><p><strong>Method</strong>: The method in this research is Posttest Only Control Group. There are 6 groups, 4 types of and 2 control groups. The concentration of the treatment group is 100%,50%, 25%, and, 12.5% while for positive control tests using chloramphenicol and aquadest as a negative control.</p><p><strong>Result</strong>: The result showed there is an influence on the intake of sand cucumber to the growth of the Shigella dysenteriae.</p><p><strong>Conclusion</strong>: Sea cucumber (<em>Holoturia scabra</em>) inhibit the growth of <em>Shigella dysenteriae</em>.</p><p><strong>Key words</strong>: <em>Shigella dysenteriae</em>, sea cucumber (<em>Holoturia scabra</em>), antibacterial</p>

scholarly journals In vitro comparison of the cytotoxicity of different endodontic sealers; AH Plus, AdSeal, Endoseal MTA, and GuttaFlow Bioseal

2021 ◽  
Author(s):  
Mehdi Dastorani ◽  
Muhammad javad Aliee ◽  
Raheleh Halabian ◽  
Mostafa Solati ◽  
Mohammadsadegh Alemrajabi
Keyword(s):  
Repeated Measures ◽  
Negative Control Group ◽  
Negative Control ◽  
Control Group ◽  
Gingival Fibroblasts ◽  
Periapical Lesions ◽  
Ah Plus ◽  
Low Cytotoxicity ◽  
Endodontic Sealers

Abstract Background: This study aimed to assess the cytotoxicity of four commonly used endodontic sealers namely AH Plus, AdSeal, Endoseal MTA, and GuttaFlow Bioseal against human gingival fibroblasts (HGFs). Methods: After culturing the HGFs, they were exposed to the respective sealers in set form and in five different weights, after sterilization. The cytotoxicity of the sealers was evaluated after 1, 3 and 7 days using the methyl thiazolyl tetrazolium (MTT) assay. Data were analyzed by repeated measures ANOVA. Results: After 24 h, all sealers showed low cytotoxicity. However, all sealers in 250 mg and 500 mg weights showed significantly higher cytotoxicity than the negative control group at 72 h, and 7 days (P<0.05) except for AdSeal in 80 mg weight (P>0.05). AH Plus was significantly more cytotoxic than other sealers at 3 and 7 days (P<0.05) while AdSeal had the closest results to the negative control group, and showed significantly higher biocompatibility than other sealers in 250 mg concentration. Conclusion: AdSeal showed the highest biocompatibility while AH Plus had the highest cytotoxicity among the tested sealers. Thus, its application may delay the healing of periapical lesions.

281 EMBRYOTOXICITY ANALYSIS OF NANOCAPSULES AND THEIR EFFECTIVENESS IN RELEASING FSH ON THE IN VITRO MATURATION OF BOVINE OOCYTES

2015 ◽  
Vol 27 (1) ◽  
pp. 229
Author(s):  
T. G. B. Rodrigues ◽  
E. M. Pioltine ◽  
E. M. Razza ◽  
M. F. G. Nogueira
Keyword(s):  
In Vitro Maturation ◽  
Slow Release ◽  
Morphological Difference ◽  
Grape Seed ◽  
Negative Control ◽  
Tween 20 ◽  
Control Group ◽  
Isopropyl Myristate ◽  
Grape Seed Oil

Liposomes and nanocapsules (NC) are nanotechnologies that allow for controlled drug-release systems, providing slow release of the incorporated or adsorbed substance in the lipid or polymeric particle. Therefore, slow-release FSH-loaded nanocapsules could be an innovative tool for the improvement of production systems. We aimed to evaluate the embryotoxicity of the NC (the vehicle without any incorporation) and analyse the effectiveness of FSH release through the addition of NC to in vitro maturation (IVM). Cumulus-oocyte complexes (COC, grades I and II) from follicles ranging 3 to 8 mm were obtained from bovine ovaries from abattoir. Ten to 20 COC were washed in TCM199 hepes medium droplets and, subsequently, in droplets through the specific group to which they were allocated. In experiment 1 (E1), 6 groups (G1, G2, G3, G4, G5, and G6; 5 replicates, n = 76 oocytes/group) were defined: G1 = negative control [1 mL of TCM199 bicarbonate, 5 μL of amikacin (16.67 μg μL–1), 2 μL of pyruvate (0.011 g mL–1)], G2 = experimental control [5 mL of TCM199 bicarbonate, 0.030 g of BSA, 5 μL of FSH (0.1 mg mL–1), 25 μL of amikacin (16.67 mg μL–1), 10 μL of pyruvate (0.011 g mL–1)], G3 = laboratory control [0.9 mL of G2, 100 mL of FCS, 10 μL of LH (50 μg mL–1), and 1 μL of oestradiol] and groups G4, G5, and G6 contained 0.9 mL of G2 plus different concentrations of empty NC: 10% (~0.1 g), 1%, and 0.1% vol/vol, respectively. In the second experiment (E2), we used the same groups, but now groups G4 to G6 were supplemented with FSH derived from NC loaded with FSH (5 replicates, n = 98 oocytes/group). The NC was produced by the coacervation method containing grape seed oil, propylene glycol, isopropyl myristate, and Tween 20 in mixture to the aqueous phase with atelocollagen and xanthan gum. The NC were submitted to sonication and produced without any active compounds for the E1 and incorporated with FSH (10 μg mL–1) for E2. There was a clear morphological difference (expansion) in cumulus cells after IVM (method according to Ali and Sirard 2002 Biol. Reprod. 66, 901–905). Data were analysed with ANOVA and post-hoc Tukey-Kramer. There was no expansion in G1, but cumulus in G2 and G3 expanded as expected (for both experiments). In both E1 and E2 there was partial expansion in G4 while G5 showed full expansion, similar to G2 and G3. Expansion of G6 was fair in E1, but in E2 the G6 expansion was similar to G1 (not expanded). In E1, cleavage (D3) rates of the highest tested concentration of NC [G4 (36.6%)] was different from G2 (72.1%), G3 (68.7%), G5 (59.3%), and G6 (69.5%; P < 0.001). Also in E2, cleavage rates of G4 (28.5%) differed from G2 (61.8%), G3 (77.2%), and G5 (64.9%). The blastocyst production did not differ between groups in E1 (P > 0.1). In E2, the group with the highest concentration of NC tested [G4 (9.5%)] and the control group [G2 (19.5%)] had different blastocyst rates (P < 0.05). Our results suggest a potential toxic effect for the pre-implantation embryo after using NC on the IVM of bovine oocytes.Authors acknowledge funding from grants #12/50533-2, #13/05083-1, #12/24423-5, #13/07730-4, São Paulo Research Foundation (FAPESP).

scholarly journals THE EFFECTIVENESS OF SOURSOP LEAF EXTRACT AGAINST GROWTH OF AGGREGATIBACTER ACTINOMYCETEMCOMITANS ATCC® 6514™ IN VITRO

2018 ◽  
Vol 11 (12) ◽  
pp. 411
Author(s):  
Ameta Primasari ◽  
Minasari Nasution ◽  
Nurul Hidayati Arbi ◽  
Dini Permata Sari ◽  
Mohammad Basyuni
Keyword(s):  
Leaf Extract ◽  
Brain Heart Infusion ◽  
Aggregatibacter Actinomycetemcomitans ◽  
Negative Control ◽  
Plate Count ◽  
Control Group ◽  
Control Group Design ◽  
Significant Difference ◽  
Mueller Hinton Agar

Objective: The objective of this study was to determine the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) antibacterial power of soursop leaf extract on Aggregatibacter actinomycetemcomitans (Aa) ATCC® 6514™ growth.Methods: This study was experimental laboratory with post-test only control group design and consists of 8 treatment groups that were soursop leaf extract group with concentration 50%, 25%, 12.5%, 6.25%, 3.125%, and 1.5625% as well as negative control groups were brain heart infusion broth (BHIB) media and chlorhexidine as positive controls. Each treatment was done 3 repetitions. Testing the effectiveness of soursop leaf extract using dilution methods on BHIB and subculture media on Mueller Hinton Agar (MHA) media. The number of Aa ATCC® 6514 ™ colonies was calculated manually using the total plate count method on the MHA media. Data were analyzed using Kruskal–Wallis test (p<0.05) followed by least significance different (LSD) test to see the significant mean difference between treatment groups.Results: Concentration of MIC from soursop leaf extract on Aa ATCC® 6514™ growth was 1.5625% and MBC was 6.25%. LSD assay results showed significant difference effect (p<0.05) Aa ATCC® 6514™ from each treatment group.Conclusion: Soursop leaf extract has antibacterial effectivity against Aa ATCC® 6514 ™.

scholarly journals Antibacterial Activity of Curcuma longa (turmeric), Curcuma zedoaria (zedoary), and Allium sativum (garlic) Nanoparticle Extract on Chicken with Chronic Respiratory Disease Complex: In Vivo Study

2020 ◽  
Vol 151 ◽  
pp. 01054
Author(s):  
Ekowati Handharyani ◽  
Lina N. Sutardi ◽  
Aulia A. Mustika ◽  
Andriani Andriani ◽  
Sri Yuliani
Keyword(s):  
Antibacterial Activity ◽  
Respiratory Disease ◽  
Allium Sativum ◽  
Curcuma Longa ◽  
Clinical Signs ◽  
Chronic Respiratory Disease ◽  
Negative Control ◽  
Control Group

Previous in vitro studies showed that nanoparticle extract of turmeric, zedoary, and garlic exhibit antibacterial activity against Mycoplasma gallisepticum (M. gallisepticum) which causes chronic respiratory disease (CRD) in chicken. This research aimed to determine the antibacterial activity of nanoparticles of Curcuma longa, Curcuma zedoaria, and Allium sativum extract to CRD infected chicken. In vivo test of antibacterial activity of turmeric, zedoary, and garlic nanoparticle in combination was conducted on chicken infected by M. gallisepticum and Escherichia coli (E.coli). Antibiotic control used was enrofloxacin. As many as 75 chickens were divided into 5 groups containing 15 chickens each. Group one consisted of healthy chickens (positive control); group two consisted of chickens that have been inoculated by bacteria (negative control); group three (treatment) were chickens inoculated by bacterium and given extract nanoparticle combination on day 7 of infection for 7 days; group four (prevention) were chickens inoculated by bacterium and given combination of extract nanoparticles on day 5 before infection for 14 days; group five were chickens inoculated with bacterium and given enrofloxacin antibiotics for 7 days. In vivo research results showed increased body weight and performance indicated by improvements in clinical signs, and gross pathology changes. The combination of three extract nanoparticles showed the best activity in controlling CRD in chicken, both as preventive and curative means.

scholarly journals IN VITRO EVALUATION OF THE ANTHELMINTIC ACTIVITY OF RHIZOME EXTRACTS OF CURCUMA LONGA (LINN.)

2018 ◽  
Vol 11 (12) ◽  
pp. 425
Author(s):  
Jyoti Pandey ◽  
Suman Mishra ◽  
Kamal Jaiswal
Keyword(s):  
Curcuma Longa ◽  
Anthelmintic Activity ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Phytochemical Analysis ◽  
Alternative Source ◽  
Significant Efficacy ◽  
Phosphate Buffered Saline

Objective: The current study was carried out to evaluate the anthelmintic activity of the rhizome extract of Curcuma longa as an alternative source of effective remedies for nematodiasis.Methods: The anthelmintic activity of the C. longa was assessed in vitro against Haemonchus spp., a gastrointestinal (abomasum) parasite of goats. Different concentrations of the extracts (1 mg/mL, 2.5 mg/mL, 5 mg/mL, and 10 mg/mL) in phosphate-buffered saline (PBS) were tested, and the results expressed in terms of time of paralysis (minute) and time of death (minute) of the worms. Albendazole (1 mg/mL) was used as a reference (positive control) and PBS as a control group (negative control).Results: The qualitative phytochemical analysis of the methanolic extract (ME) of the plant disclosed the presence of alkaloids, glycosides, terpenoids, flavonoids, tannins, saponins, phenol, anthraquinone, and carbohydrates; whereas, the aqueous extract (AE) showed the presence of alkaloids, carbohydrate, flavonoids, and saponins. Both ME and AE of the C. longa (rhizome) expressed significant efficacy (p≤0.05) in causing paralysis as well as the death of the worms within 12 h of exposure at all tested concentrations, as compared to the negative control. The rhizome extracts of C. longa showed dose-dependent efficacy in causing paralysis of the worm motility and the final progression to death. The results showed that the ME at 10 mg/mL was significantly more potent (p≤0.05) over the AE.Conclusions: This study concluded that the rhizome extract of C. longa exhibited potent anthelmintic efficacy against the nematode parasite, Haemonchus spp.

scholarly journals Effect of different periodontal ligament simulating materials on the incidence of dentinal cracks during root canal preparation

2018 ◽  
Vol 12 (3) ◽  
pp. 196-200
Author(s):  
Ajita Rathi ◽  
Prateeksha Chowdhry ◽  
Mamta Kaushik ◽  
Pallavi Reddy ◽  
Roshni Roshni ◽  
...  
Keyword(s):  
Root Canal ◽  
Periodontal Ligament ◽  
Negative Control Group ◽  
Negative Control ◽  
Control Group ◽  
P Value ◽  
Root Canal Preparation ◽  
Impression Material ◽  
Group 1

Background. The present study was undertaken to evaluate the incidence of dentinal cracks during root canal preparation with different periodontal ligament simulating materials in vitro. Methods. Seventy freshly extracted human mandibular first premolars were selected and divided into 7 groups in terms of simulating material: group 1: polyether impression material; group 2: polyvinyl acetate adhesive; group 3: polyvinyl siloxane impression material; group 4: cyanoacrylate adhesive; group 5: epoxy resin adhesive; group 6: positive control, without any periodontal ligament simulation; and group 7: negative control, where neither a periodontal ligament simulating material was used nor canal preparation was carried out. Root canal preparation was carried out in all the groups followed by sectioning of roots at 3 mm, 6 mm and 9 mm. The sections were evaluated under a stereomicroscope at ×2.5 for the presence or absence of cracks. Chi-squared test was used to compare the appearance of defective roots between the different experimental groups. Results. The least number of cracks were found in the negative control group, followed by group 1 where polyether impression material was used for periodontal ligament simulation. The difference was significant with a P-value of 0.002 for coronal sections. Conclusion. Under the limitation of the present study, polyether and polyvinyl siloxane (light body) can both be used for simulation of periodontal ligament.

In vitro Comparative Evaluation of the Fracture Resistance of Simulated Immature Teeth reinforced with Different Apical Barriers and Obturation Combination

2016 ◽  
Vol 7 (3) ◽  
pp. 113-118
Author(s):  
Neveen A Shaheen ◽  
Nahla G El-Din El-Helbawy
Keyword(s):  
Fracture Resistance ◽  
Comparative Evaluation ◽  
Negative Control ◽  
Control Group ◽  
Root Canals ◽  
Immature Teeth ◽  
Gutta Percha ◽  
Group I ◽  
Significant Difference

ABSTRACT Aim This study aimed to assess and compare the fracture resistance of simulated immature teeth reinforced with Biodentine (BD) and mineral trioxide aggregate (MTA) as apical barriers and two root canal backfilling combination (gutta-percha/AH26, MetaSeal). Materials and methods A total of 70 extracted human maxillary incisors were randomly divided into seven groups (n = 10). The positive control group was not instrumented. For the other groups, coronal access was made and root canals were instrumented using the ProTaper, up to F5 followed by six Peeso reamers which were allowed to pass 1 mm beyond the apex to size 6 (1.7 mm) to simulate immature teeth. The apical 4 mm of their root canals was filled with either MTA or BD apical barrier, then backfilled with gutta-percha/AH26 or MetaSeal obturation combination. The negative control group was left unfilled. Composite resin was used to restore the coronal access cavities. The maximum load for fracture of each tooth was recorded utilizing a universal testing machine. Data were analyzed using two-way analysis of variance. Results The noninstrumented group I had the highest fracture resistance and differed significantly (p < 0.05) from the negative control groups. On the contrary, no significant difference was found between BD and MTA groups, regardless of the backfilling combination (p > 0.05). Conclusion There was no difference between MTA and BD apical barriers and the backfilling combination regarding their resistance to root fracture. How to cite this article Shaheen NA, El-Din El-Helbawy NG. In vitro Comparative Evaluation of the Fracture Resistance of Simulated Immature Teeth reinforced with Different Apical Barriers and Obturation Combination. World J Dent 2016;7(3):113-118.

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