Superficial dye penetration of two conventional ionomers used as dental fissures sealants

Objective: This study aimed to evaluate surface dye penetration of two conventional glass ionomer cements (GIC), one of them a high viscous ionomer. Methods: 20 standard disk samples measuring 2 mm thick and 4 mm in diameter were made for each conventional GIC. The high viscous ionomer was used as the control (Group 1). Samples were embedded in wax and submitted to pH cycling for 7 days simulating a high cariogenic challenge in a kiln (37ºC). All samples were brushed with an extra-soft bristles infant toothbrush to mimic oral hygiene after exposure to a demineralizing solution for 6 hours. The samples were immersed in a 1% methylene blue solution for 2 hours at the end of cycling. The Mann-Whitney Rank Sum Test was used to analyze the difference between the two GIC. Results: All samples disclosed a superficial dye penetration of 0.6 to 1.5 mm depth. There was no statistical d ifference b etween t he G IC t ested ( p = 0.883). Conclusion: Both GIC tested in this study exhibited superficial dye penetration to depths of at least until their superficial third.

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Studies on Adhesion of Composite Resins and Glass-Ionomer Cements in Open-Sandwich Technique

Revista de Chimie ◽

10.37358/rc.17.8.5786 ◽

2017 ◽

Vol 68 (8) ◽

pp. 1890-1894

Author(s):

Cristina Angela Ghiorghe ◽

Gianina Iovan ◽

Sorin Andrian ◽

Irina Nica ◽

Claudiu Topoliceanu ◽

...

Keyword(s):

Composite Resins ◽

Control Group ◽

Glass Ionomer ◽

Sandwich Technique ◽

Dye Penetration ◽

Blue Solution ◽

Group 2 ◽

Materials Used ◽

Group 1

The aim of this study was to assess the quality of the interface between dental root cement and some restorative materials used in the open sandwich technique. Standardised cavities were prepared on the buccal and oral surfaces of 30 human molars with the gingival margin situated in root cement. The teeth were randomly divided in 3 groups. Different materials combinations were used in buccal and oral cavities. In the control group, the cavities were filled only with composite resins (Filtek Z250-3M ESPE and Zmack Comp-Zermack). In the test groups the cavities were restored using an open sandwich technique as follows: in group 1 Filtek Z250 in combination with Dyract, respectively Ketac Molar Easymix; in group 2 Zmack Comp in combination with Dyract, respectively Ketac Molar. The teeth were stored in 1% methylene blue solution, for 24 hours. The samples were longitudinally sectioned through the centre of restorations and the degree of dye penetration as well as the morphology of the interface between the root cement and the restorative material were evaluated by optical microscopy and SEM. The results showed less microleakage and and adhesive failures in open sandwich restorations with Zmack Comp and Dyract combination.

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

RGO - Revista Gaúcha de Odontologia ◽

10.1590/1981-863720150003000022935 ◽

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.

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Esthetic restorative materials and glass ionomer cements: Influence of acidic drink exposure on bacterial adhesion

European Journal of Dentistry ◽

10.4103/ejd.ejd_219_17 ◽

2018 ◽

Vol 12 (02) ◽

pp. 204-209 ◽

Cited By ~ 2

Author(s):

Claudio Poggio ◽

Lodovico Vialba ◽

Riccardo Marchioni ◽

Marco Colombo ◽

Giampiero Pietrocola

Keyword(s):

Bacterial Adhesion ◽

Soft Drink ◽

Cylindrical Sample ◽

Bacterial Suspension ◽

Glass Ionomer Cements ◽

Glass Ionomer ◽

Restorative Materials ◽

Group 3 ◽

Group 2 ◽

Group 1

ABSTRACT Objective: The purpose of this research was to evaluate and compare bacterial adhesion on five esthetic restorative materials, three glass ionomer cements (GIC), and two GIC with coat. All the materials were considered after acidic drink exposure. Materials and Methods: Thirty cylindrical sample of each of the 10 materials were prepared and then divided into three groups: group 1 (baseline), Group 2 (1 day in acidic soft drink), and Group 3 (7 days in acidic soft drink). Bacterial suspension of Streptococcus mutans was cultured and deposited onto each material, and the adhesion was evaluated through the colony-forming units determination. One-way ANOVA and Bonferroni's post hoc tests were applied to estimate significant differences between the esthetic materials. Results: The highest amount of S. mutans was recorded in Group 3 and the lowest in Group 1 (baseline). In general, the GIC showed bacterial adhesion values higher than the ones related to composites both in Group 2 than in Group 3. Acidic soft drinks lead a time-dependent degradation of restorative materials causing an increase of the surface rugosity. In fact, a general increase in S. mutans cells adhesion to treated samples was observed. Conclusions: The use of acidic soft drink resulted in a degradation of the surface layer of the restorative material with consequent increase of bacterial adhesion. The GIC can be considered a more friendly environment for bacterial adhesion. This is true in particular if acid substances have already deteriorated the surface.

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Cytomorphometric and Morphological Analysis in Women with Trichomonas vaginalis Infection: Micronucleus Frequency in Exfoliated Cervical Epithelial Cells

Acta Cytologica ◽

10.1159/000431148 ◽

2015 ◽

Vol 59 (3) ◽

pp. 258-264 ◽

Cited By ~ 6

Author(s):

Zehra Safi Oz ◽

Banu Doğan Gun ◽

Mustafa Ozkan Gun ◽

Sukru Oguz Ozdamar

Keyword(s):

Epithelial Cells ◽

Trichomonas Vaginalis ◽

Control Group ◽

Study Group ◽

Control Groups ◽

The Mean ◽

The Difference ◽

Group 2 ◽

And Control ◽

Group 1

Objectives: The aim of this study was to explore the cytomorphometric and morphological effects of Trichomonas vaginalis in exfoliated epithelial cells. Study Design: Ninety-six Pap-stained cervical smears were divided into a study group and two control groups as follows: T. vaginalis cases, a first control group with inflammation, and a second control group without inflammation. Micronucleated, binucleated, karyorrhectic, karyolytic, and karyopyknotic cells and cells with perinuclear halos per 1,000 epithelial cells were counted. Nuclear and cellular areas were evaluated in 70 clearly defined cells in each smear using image analysis. Results: The frequencies of morphological parameters in the T. vaginalis cases were higher than the values of the two control groups, and the difference among groups was found to be significant (p < 0.05). The nuclear and cytoplasmic areas of epithelial cells were diminished in patients with trichomoniasis. The mean nucleus/cytoplasm ratio in T. vaginalis patients was higher than the value in the control groups, and the difference between the study group and control group 1 was significant. However, there was no statistically significant increase between the study group and control group 2. Conclusions:T. vaginalis exhibited significant changes in the cellular size and nuclear structure of the cells. The rising frequency of micronuclei, nuclear abnormalities, and changing nucleus/cytoplasm ratio may reflect genotoxic damage in trichomoniasis.

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Arterial hypertension in combination with atrial fibrillation and extracardiac diseases

Kazan medical journal ◽

10.17816/kmj2018-894 ◽

2018 ◽

Vol 99 (6) ◽

pp. 894-899 ◽

Cited By ~ 1

Author(s):

L D Khidirova ◽

D A Yakhontov ◽

S A Zenin

Keyword(s):

Atrial Fibrillation ◽

Arterial Hypertension ◽

Comparison Group ◽

Density Lipoprotein ◽

Control Group ◽

Galectin 3 ◽

Group 3 ◽

The Difference ◽

Group 5 ◽

Group 1

Aim. To evaluate the character of the course and to determine the features of biochemical manifestations in patients with atrial fibrillation and arterial hypertension combined with extracardiac diseases. Methods. To study the features of the course of persisting form of atrial fibrillation (AF) in patients with arterial hypertension (AH) stage 3 combined with extracardiac diseases. 374 patients aged 45 to 65 years were examined. Among them chronic obstructive pulmonary disease (COPD; n = 37), diffuse toxic goiter (DTG; n = 33), hypothyroidism (HT; n = 69), diabetes mellitus (DM; n = 49) and abdominal obesity (AO; n = 64) of mild and moderate degree were detected. 5 groups were formed: group 1 - AH + AF + COPD, group 2 - AH + AF + HT, group 3 - AH + AF + DTG, group 4 - AH + AF + DM, group 5 - AH + AF + AO. The control group included 56 patients with AH and AF without concomitant diseases, and the comparison group included 36 patients with AF without AH and 30 patients with AH without AF. The study evaluated clinical, anthropometric and laboratory parameters, the results of instrumental diagnostic investigation. The level of galectin-3 was determined in the serum by ELISA. The concentration of brain natriuretic peptide (NT-proBNP) was measured with a panel “NT-proBNP - ELISA - Best”. Multiple comparisons of the groups were performed with Kruskal - Wallis test. To compare binary and categorical parameters, exact two-tail Fisher’s test was used. Optimal multivariate regression models were developed directly and reversely. Verification of statistical hypotheses was carried out with critical value of significance p = 0.05 i.e. the difference was considered statistically significant if p < 0.05. All statistical calculations were performed with the use of R-Studio soft. Results. When assessing the lipid profile in the studied groups, significant differences were detected for HDL (high density lipoprotein) the values of which were the highest in the control group; TC (total cholesterol) was significantly lower in group 1 and 2; LDL (low density lipoprotein) and TG (triglycerides) - in group 3. The level of uric acid in the serum in all clinical groups was higher compared to those of the control group but significance was reached only in group 3. The concentration of K+ in the blood was significantly higher in all groups compared to the control group. The study of NT-proBNP and galectin-3 as markers reflecting the processes of remodeling and myocardial fibrosis in patients with atrial fibrillation combined with arterial hypertension, demonstrated that the average level of NT-proBNP in all groups was higher than in the control group but the difference was significant only in group 5. The level of galectin-3 in the serum of patients with arterial hypertension and atrial fibrillation combined with comorbid extracardiac pathology was significantly higher in the groups compared to the control group (except for group 3 where the number of patients was the lowest) and significantly lower in the comparison group of patients with atrial fibrillation without arterial hypertension. Conclusion. The course of arterial hypertension and atrial fibrillation with concomitant extracardiac diseases is characterized by the changes of biochemistry, which manifest as the changes of lipid profile, electrolyte content and factors inducing fibrosis. The obtained data confirm the possible role of galectin-3 as a biological marker of fibrosis and myocardial remodeling in patients with AF and AH and comorbid extracardiac pathology.

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Sealing Ability of Mineral Trioxide Aggregate, Biodentine and Glass Ionomer as Root-End Materials: A Question of Choice

Acta Medica Academica ◽

10.5644/ama2006-124.312 ◽

2021 ◽

Vol 49 (3) ◽

pp. 232

Author(s):

Aida Džanković ◽

Naida Hadžiabdić ◽

Samra Korać ◽

Irmina Tahmiščija ◽

Alma Konjhodžić ◽

...

Keyword(s):

Mineral Trioxide Aggregate ◽

Negative Control Group ◽

Positive Control ◽

Negative Control ◽

Control Group ◽

Dye Penetration ◽

Anterior Teeth ◽

Sealing Ability ◽

Significant Difference ◽

The Difference

Objectives. The goal of this study was to determine the sealing ability of MTA, Biodentine, and Fuji IX as root-end materials after ultrasonic retrograde preparation using a dye penetration method. Materials and Methods. Seventy permanent anterior teeth were used in this study. Root canals were prepared using rotary endodontic files, and obturated using the lateral condensation technique. The resection of the root apices was performed perpendicularly to the long axis, and 3 mm deep retrocavities were made by ultrasonic tips. The samples were randomly divided into three experimental groups (N=20) and two control groups (N=5). The root-end cavities were filled with mineral-trioxide aggregate (Rootdent MTA, TehnoDent, Russia) in Group 1, Biodentine (Septodont, Saint Maur des Fossés, France) in Group 2 and Fuji IX GP (GC Corporation, Tokyo, Japan) in Group 3. The retrocavities of the positive control group were left unfilled, while retrocavities in the negative control group were sealed using a flowable composite material. The samples were made transparent, and dye penetration was assessed under a stereomicroscope (x10). The data were analyzed with the Kruskal-Wallis test and the Mann-Whitney U-test. Results. The Biodentine group had a lower mean leakage value than the MTA and Fuji IX groups, and the difference was statistically significant (P<0.01). No statistical difference in apical microleakage was found between the MTA and Fuji IX groups (P>0.05). Conclusion. Within the limitations of this study, it was concluded that Biodentine provides better sealing ability as a root-end material than MTA and Fuji IX. There was no statistically significant difference between the sealing ability of MTA and Fuji IX as root-end materials.

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Clinical Evaluation of Cement Thickness Around Pre- Fabricated vs. Costume-Fabricated Posts

European Scientific Journal ESJ ◽

10.19044/esj.2016.v12n27p39 ◽

2016 ◽

Vol 12 (27) ◽

pp. 39

Author(s):

Bardocz Veres Zsuzsanna ◽

Cerghizan Diana

Keyword(s):

Methylene Blue ◽

Clinical Evaluation ◽

Canal Wall ◽

Methylene Blue Solution ◽

Impression Technique ◽

Single Tooth ◽

Blue Solution ◽

Digital Caliper ◽

Group 1

Objectives: The purpose of this study was to evaluate the variation of cement thickness in different regions of the root in case of prefabricated and custom-fabricated posts. Material and methods: Totally twelve extracted human incisors and premolars with single tooth canals were distributed among 3 experimental groups of 4 specimens each. They were treated endodontically and restored with prefabricated fibre posts or custom-fabricated metallic posts, cemented with different adhesive cements. Each sample was immersed in 1% methylene blue solution and after 10 days the teeths were sectioned into horizontal slices,resulting in three slices for each specimen. The distances between the canal wall and the post perimeter were measured on images of each slice with digital caliper. Results: The costume-fabricated post groups (group 2,3) obtained statistically significant lower cement thicknesses,in particular in the apical third. The prefabricated post group (group 1) showed the highest cement thickness. Cement thickness was less for the specimens prepared using direct impression technique.

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An In Vitro Comparison of the Apical Seal Produced by Three Different Thermoplasticized Guttapercha Obturation Techniques in Oval Canals

Dental Journal of Advance Studies ◽

10.1055/s-0038-1672012 ◽

2015 ◽

Vol 03 (01) ◽

pp. 039-046

Author(s):

Geetanjali Bansal ◽

Ajay Bansal ◽

Bhupinder Padda

Keyword(s):

Control Group ◽

Group Iii ◽

Dye Penetration ◽

Sealing Ability ◽

India Ink ◽

Nail Polish ◽

Group I ◽

Group Ii ◽

The Difference

AbstractThe aim of this study was to evaluate and compare the sealing ability to obturate oval canals with three thermoplasticizedguttaperchaobturation techniques taking lateral condensation technique as the control. Ninety-five freshly extracted teeth were decoronated at 2mm coronal to CEJ. Biomechanical preparation was done using step back technique. The teeth were divided into three experimental groups of 30 teeth each and one control group of 5 teeth. The group I (control group) was obturated with lateral condensation technique, group II obturated with injectable thermoplasticizedguttapercha technique, group III obturated with thermoplasticizedguttapercha with downpack and backfill technique andgroup IV obturated with core carrier thermoplasticizedguttapercha technique. The sealability of each technique was assessed by a dye penetration method. The roots were given two full layers of nail polish varnish except apical 2mm. Specimens were then immersed in India ink for 48 hours. Robertson’s technique was used to clear the specimens. The linear dye penetration was measured from anatomic apex to the deepest extent of dye penetration in a coronal direction using triocular stereomicroscope at 10 × magnification. The mean dye leakage of group I was 2.6700mm;group II 0.1713mm;group III 3.3977mm; group IV 2.3210mm. When the means of all the four groups were compared using Kruskal Wallis test the difference was found to be very highly significant with the value<.001**, meaning there by that group II is significantly better than the other three groups as far as sealing ability is concerned.

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Water Absorption and HEMA Release of Resin-Modified Glass-Ionomers

European Journal of Dentistry ◽

10.1055/s-0039-1697443 ◽

2009 ◽

Vol 03 (04) ◽

pp. 267-272 ◽

Cited By ~ 14

Author(s):

Nilufer Celebi Beriat ◽

Dilek Nalbant

Keyword(s):

Water Absorption ◽

High Performance ◽

Deionized Water ◽

Glass Ionomer Cements ◽

Glass Ionomer ◽

Time Intervals ◽

Significance Level ◽

Glass Containers ◽

Resin Modified Glass Ionomer ◽

The Difference

ABSTRACTObjectives: The aim of this study was to evaluate the water absorption and the amount of hydroxyethyl metacrylate (HEMA) level released from various resin modified glass ionomer cements.Methods: Advance, Vitremer and Protec-Cem resin modified glass ionomer cements were used to evaluate the HEMA release. Ten specimens were fabricated from each cement in 10 × 1 mm height. Thirty specimens were immersed in glass containers filled with 20 ml deionized water. 1 ml solution was taken from the container at 10 minutes, 1 hour, 24 hour and 7 days intervals from each group and analyzed with high performance liquid chromatography (HPLC) machine and the results are presented in ppm. The data were subjected to Kruskal-Wallis, Mann-Whitney and Wilcoxon tests at a 0.05 significance level.Results: At all time intervals Vitremer showed highest HEMA release (10 min: 54.2 ppm; 1 h: 86.8 ppm; 24 h: 93.4 ppm) (P=0.0001). At the end of 10 minutes and first hour, following Vitremer, HEMA release was highest for Protec-Cem (10 min: 14.8 ppm; 1 h: 23.6 ppm) and then Advance (10 min: 5.5 ppm; 1 h: 18.8 ppm) (P<.05). Water absorption tests were performed according to the specifications of ISO 4049. Water absorption was highest for Vitremer and lowest for the Protec-Cem and the difference among cement groups was significant (P<.005).Conclusions: Vitremer showed the highest HEMA release and water absorption values and Protec-Cem showed the lowest values. HEMA release by time was significant for Advance cement. This release may be relevant both to the risk of adverse pulpal responses in patients and to the risk of allergy in patients and dental personnel. (Eur J Dent 2009;3:267-272)

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Effect of Mixing Process on Microleakage of Glass Ionomer Cements Used in Atraumatic Restorative Treatment on Primary Molars

Journal of Clinical Pediatric Dentistry ◽

10.17796/jcpd.31.4.w61062505158g841 ◽

2007 ◽

Vol 31 (4) ◽

pp. 251-256 ◽

Cited By ~ 1

Author(s):

Fernanda de Morais Ferreira ◽

Miriam Pimenta Parreira do Vale ◽

Wellington Corrêa Jansen ◽

Saul Martins Paiva ◽

Isabela Almeida Pordeus

Keyword(s):

Class Ii ◽

Primary Molars ◽

Atraumatic Restorative Treatment ◽

Glass Ionomer Cements ◽

Glass Ionomer ◽

Mixing Process ◽

Mechanical Mixing ◽

Restorative Treatment ◽

Dye Penetration

Aiming to assess the effect of mixing process on microleakage, 40 primary molars were filled with encapsulated glass ionomer cements (GICs) (Vidrion,RCaps and Fuji,IXGPFAST) or with GICs stored in bottles (Vidrion,R and Fuji,IX). Dye penetration was assessed using scores. Encapsulation and mechanical mixing have reduced significantly marginal microleakage levels in class II restorations performed with conventional GICs if compared to the values obtained by their bottled correspondents (p=0,000).

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