scholarly journals Phosphate Ion Release and Alkalizing Potential of Three Bioactive Dental Materials in Comparison with Composite Resin

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Shahin Kasraei ◽  
Sahebeh Haghi ◽  
Sara Valizadeh ◽  
Narges Panahandeh ◽  
Sogol Nejadkarimi
Keyword(s):  
Bioactive Compounds ◽  
Composite Resin ◽  
Ph Value ◽  
Dental Materials ◽  
Distilled Water ◽  
Ion Release ◽  
Bioactive Materials ◽  
Tooth Remineralization ◽  
Phosphate Ion ◽  
Significant Difference

Aim. Several new bioactive compounds were recently introduced to the market with favorable ion release, tooth remineralization, and alkalizing potential. This study sought to compare the phosphate ion release and alkalizing potential of three bioactive materials in comparison with composite resin. Methods. Thirty-six discs (2 × 6 mm) were fabricated from Fuji II LC resin modified glass ionomer (RMGI), Activa BioActive, Cention N, and Z250 composite in plastic molds. The specimens were stored in distilled water for 24 and 48 h and 6 months. Half of the specimens were used to assess the phosphate ion release while the other half were used to assess the alkalizing potential 1 h after pH drop from 6.8 to 4. Phosphate ion release was quantified by a spectrophotometer while the pH value was measured by a pH meter. Data were analyzed using two-way ANOVA, one-way ANOVA, and Tukey’s HSD test (for pairwise comparisons) at 0.05 level of significance. Results. At 24 h, the maximum phosphate ion release in distilled water occurred in the Fuji II LC group followed by Cention N, Activa BioActive, and Z250. At 6 months, Cention N followed by Activa BioActive showed higher phosphate ion release than Fuji II LC and Z250. No significant difference was noted between Activa BioActive and Cention N at any time point. All materials, except for Z250, increased the pH of the environment. Fuji II LC had maximum alkalizing effect at all time points followed by Cention N and Activa BioActive. Conclusion. Use of bioactive compounds is a promising method to ensure phosphate ion release, and can have a positive effect on tooth remineralization over time. Also, bioactive compounds can alkalize an acidic environment.

scholarly journals Nickel ion release from dental alloys in two different mouthwashes

2019 ◽  
Vol 13 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Karim Jafari ◽  
Saeed Rahimzadeh ◽  
Somayeh Hekmatfar
Keyword(s):  
Inductively Coupled Plasma ◽  
Control Group ◽  
Distilled Water ◽  
Dental Alloys ◽  
Ion Release ◽  
Nickel Ion ◽  
Inductively Coupled ◽  
Nickel Chromium ◽  
Significant Difference ◽  
History Of

Background. Mouthwashes are widely used as adjuncts to mechanical oral hygiene procedures. Nonetheless, there is little information regarding the effect of various mouthwashes on the amount of ions released from the nickel-chromium (Ni‒Cr) alloys used in the fabrication of fixed prostheses. Therefore, the present study was conducted to evaluate the effect of two types of mouthwash on the release of Ni ions from dental alloys. Methods. Forty-two disk-shaped specimens were prepared with a diameter of 10 mm and a height of 2 mm. Two mouthwashes were examined in this study: Oral B and Listerine. A control group was also considered using distilled water. Each Ni‒Cr disk was immersed in the mouthwashes and distilled water in polypropylene test tubes, and then incubated at 37°C to simulate the oral temperature. After 45 days of incubation, the samples were tested for Ni ions using inductively coupled plasma mass spectroscopy. Data were analyzed using ANOVA. Results. In the Halita group subjects exhibited 2.04±0.65 reduction in OLS. OLS reduction in the chlorhexidine group was 1.95±0.74. Statistical analysis showed no significant difference between the two groups (P>0.05). Conclusion. As the results indicated, the amount of ion release was within the safe limits in the two experimental groups. However, it is recommended that prescribe Listerine mouthwash should not be prescribed for the patients with a history of Ni allergy.

scholarly journals INFLUÊNCIA DOS ENXAGUATÓRIOS BUCAIS NA RUGOSIDADE SUPERFICIAL DE UMA RESINA COMPOSTA

2016 ◽  
Vol 7 (4) ◽  
Author(s):  
Gabriela Sampaio Aragão ◽  
Renata Martins Falcão ◽  
Íris Durães ◽  
Rebeca Barroso Bezerra
Keyword(s):  
Composite Resin ◽  
Control Group ◽  
Internal Diameter ◽  
Distilled Water ◽  
Average Roughness ◽  
Significance Level ◽  
Dental Biofilm ◽  
Mouth Rinses ◽  
Significant Difference ◽  
Composite Resin Restorations

Surface smoothness is an important feature of restorative material. Thus, composite roughness levels should be low to make retention of dental biofilm. Alterations of the surface of composite resin restorations can be associated to drinks and acidic foods, components of saliva, finishing and polishing methods, as well as the action of bleaching agents, rinses and fluoride. Purpose: To evaluate the effect of mouth rinses in superficial roughness of composite resin through a quantitative evaluation. Methods: 48 specimens with composite resin FiltekTM Z350 XT were made and divided into 4 groups (n=12): distilled water, Colgate® Plax, Oral B® and Listerine®. Specimens were made using a rectangular matrix with holes, each measuring 0.8 cm of internal diameter and 0.2 cm in thickness. The specimens were immersed in 50 ml of each substance, for 12 hours, to simulate a year of daily use of the solution for 2 minutes. Then specimens were stored in distilled water until reading of the roughness tester. Data were statistically treated by ANOVA and Tukey tests, with a significance level of 95%. Results: No statistically significant difference was observed between the control group and Listerine® (p = 0.03). When comparing the average roughness of different brands of mouthwashes, there was no statistically significant difference (p > 0.05). Conclusions: Among the mouthwashes tested, only Listerine® caused statistically significant increase in superficial roughness of the composite resin used.

Comparative Evaluation of Solubilities of Two Nanohybrid Composite Resins in Saliva Substitute and Distilled Water: An in vitro Study

2017 ◽  
Vol 7 (2) ◽  
pp. 82-85 ◽  
Author(s):  
Pranjal S Walzade ◽  
Sumanthini MV ◽  
Vanitha U Shenoy ◽  
Rohini P Mahajan
Keyword(s):  
Comparative Evaluation ◽  
Composite Resin ◽  
Composite Resins ◽  
Long Term Results ◽  
P Value ◽  
Distilled Water ◽  
Saliva Substitute ◽  
Significant Difference ◽  
Nanohybrid Composite

ABSTRACT Aim of the study To determine the solubility of nanohybrid (NH) composite resins when immersed in saliva substitute and distilled water. Materials and methods A total of 60 disc-shaped samples (n = 30) were prepared in teflon molds of diameter 10 mm × 2 mm thickness from two NH composite resins. They were light-cured following which the samples were removed and weighed three times using a digital balance. Samples were then immersed in test solutions, i.e., 100 mL of distilled water and saliva substitute each stored for 24 hours and 7, 14, 21, and 28 days in an incubator at 37°C at 100% humidity. At the time intervals mentioned, the samples were removed from the incubator, washed with distilled water, blotted dry, and weighed. Samples were again immersed in fresh test solutions. Difference in preweight and postweight of samples was calculated and data were analyzed using appropriate test by testing normality. A p-value < 0.05 was considered to be significant. Results The results were analyzed using one-way analysis of variance (ANOVA). As observed from the baseline weight to the 28th day weight, there was a loss of weight of the samples in all the groups except NH composite resin (Flash) in distilled water. Conclusion From the results of the study, it was observed that there was no statistically significant difference in weight, with respect to the solubility of the two NH composite resins and the two solutions tested. Clinical significance of the study is that the NH composite resin that shows lesser solubility can be the choice for an esthetic restorative material in patients for long-term results. How to cite this article Mahajan RP, Shenoy VU, Sumanthini MV, Walzade PS. Comparative Evaluation of Solubilities of Two Nanohybrid Composite Resins in Saliva Substitute and Distilled Water: An in vitro Study. J Contemp Dent 2017;7(2):82-85.

scholarly journals Alkalizing potential and calcium release of residues from intracanal dressing containing calcium hydroxide

2018 ◽  
Vol 47 (6) ◽  
pp. 383-387
Author(s):  
Mariana Pires CRESPO ◽  
Kamila de Figueiredo PEREIRA ◽  
Milton Carlos KUGA ◽  
Thiago Soares PORTO ◽  
Luciana ARMADA
Keyword(s):  
Calcium Hydroxide ◽  
Calcium Ions ◽  
Root Canal ◽  
Calcium Release ◽  
Ph Value ◽  
Positive Control ◽  
Positive Control Group ◽  
Control Group ◽  
Distilled Water ◽  
Significant Difference

Abstract Introduction If the restoration, that seal the root canal from oral environment, failed or solubilize, the intracanal dressing could be partially removed, decreasing the efficiency of calcium hydroxide (CH). Objective To evaluate the alkalizing potential and calcium ions release of intracanal residues from different medications, in different periods. Materials and method Human incisors were endodontically instrumented and randomly divided (n=10). The root canals were filled with: G1⎯Calcium hydroxide (CH); G2⎯CH with 0.4% chlorhexidine digluconate (CHC); G3⎯CH with camphorated paramonochlorophenol and glycerin (HPG); G4⎯CH was maintained during all experiment, as positive control group (PC) and G5⎯ No medication was performed in the negative control group (NC). The specimens were immersed in distilled water for 7 days. The intracanal dressing was removed from the experimental groups using F1 instrument (Protaper). The teeth were stored in distilled water for 24 hours, 7, 14 and 28 days. pH value and calcium ions released were evaluated and the data were submitted to ANOVA one-way and Tukey tests. Result All experimental groups presented lower alkalizing potential and calcium ions release than PC (P<0.05). No significant difference was found among the experimental groups, regardless of the period (P>0.05). Conclusion The alkalizing potential and calcium ions release of residues from different intracanal dressing, in different periods, were similar and lower than the positive control group, that the medication was maintained inside the root canal, encouraging the replacement of intracanal dressing when the restoration fail.

scholarly journals Effect of beverages with different alcoholic concentration on composite resins

2018 ◽  
Vol 21 (2) ◽  
pp. 198
Author(s):  
Laís Andrade La-Gatta ◽  
Alexandre Marques de Resende ◽  
Luís Felipe Marques de Resende ◽  
Rafael Barroso Pazinatto ◽  
Igor Do Carmo de Souza ◽  
...  
Keyword(s):  
Red Wine ◽  
Composite Resin ◽  
Color Change ◽  
Alcoholic Beverage ◽  
Color Stability ◽  
Composite Resins ◽  
Alcoholic Beverages ◽  
Distilled Water ◽  
Significant Difference ◽  
Color Composite

<p><strong>Objective: </strong>To evaluate if alcoholic beverages can cause color change in composite resins, if the alcoholic concentration influences this variation besides analyzing within the composite resins tested, which would present greater color stability when subjected to the experiment. <strong>Material and Methods: </strong>90 specimens of three different composite resins (IPS Empress Direct, Grandio®So and Filtek Z350 XT) were immersed in distilled water (control group), red wine and vodka. The samples were 2 mm thick and 8 mm in diameter, photopolymerized for 20 s on each side, polished with sandpaper, silicon carbide tip and felt disc with prophylactic paste and immersed in distilled water at 37 °C for 24 h prior to subgrouping. For the evaluation of the color variation, the formula prioritized by the CIEL *a *b* system was used. Data were analyzed by ANOVA and Tukey’s test at 95% significance. <strong>Results: </strong>The lowest variations occurred with the Grandio®So resin when exposed to wine, and Filtek Z350 XT when exposed to vodka. There was a statistically significant difference between the groups in water (p &lt; 0.01) and in red wine (p &lt; 0.01), but not in vodka (p &gt; 0.05). The soaking medium that most caused staining was red wine. <strong>Conclusion: </strong>Red wine was the drink that generated the highest staining in all the resins tested, vodka did not change color stability significantly, the alcoholic concentrations tested did not directly influence the color change and the composite resin Grandio®So presented greater color stability when exposed to red wine.</p><p> </p><p><strong>Keywords</strong></p><p>Alcoholic beverage; Color; Composite resin.</p><p> </p><p>KEY WORDS: Alcoholic beverage, color, composite resin.</p>

scholarly journals Effects of Addition of Quaternary Ammonium Antimicrobial Compounds into Root Canal Sealers

2019 ◽  
Vol 13 (02) ◽  
pp. 243-247
Author(s):  
Mirjana L. Paunovska ◽  
Nichola J. Coleman ◽  
Marija M. Stevanovic ◽  
Aleksandar G. Dimkov ◽  
Dragana Gabric ◽  
...  
Keyword(s):  
Root Canal ◽  
Ph Value ◽  
Cetylpyridinium Chloride ◽  
Chloride Ions ◽  
Distilled Water ◽  
Honestly Significant Difference ◽  
Significant Difference ◽  
Post Hoc ◽  
The Impact ◽  
Root Canal Sealers

Abstract Objective The aim of this study is to determine the effect of the addition of benzalkonium chloride and cetylpyridinium chloride in three commercial root canal sealers. Materials and Methods Three different root canal sealers were used: EndoRez, N2, and Apexit Plus. The samples were prepared by mixing the components according to the manufacturers’ guidelines and adding 2% in weight of the antimicrobials to the newly mixed cement. The paste was placed in molds and stored in an incubator (37°C, 24 h). The samples were then stored in 5-mL distilled water. Samples without antimicrobials served as a control. All samples were tested at 3 time intervals: 1 day, 1 week, and 1 month following their storage in distilled water. The impact of the antimicrobials on the solubility of the sealers, the release of chloride ions (Cl—), and the pH value were examined. Statistical Analysis Analysis was done using one-way analysis of variance and the post hoc Tukey's honestly significant difference test. Results Chloride ions are present in storage media with EndoRez, N2, and Apexit Plus samples (without antimicrobials) following all tested storage intervals. The addition of the antimicrobials increased the release of chloride ions. Endodontic cements without addition of antimicrobials show an increase in weight after 1 month. The highest pH value is measured in Apexit Plus samples. The solutions in which N2 samples (with and without addition of antimicrobials) were stored did not have a significant change in their pH, while in the EndoRez solutions, a significant decrease in the pH value after the first week was measured. Conclusions The addition of antimicrobials might lead to improved characteristics of the root canal sealers.

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

Nanomaterials ◽  
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.

scholarly journals PENGARUH WAKTU POLISHING DAN ASAM SITRAT TERHADAP MICROLEAKAGE PADA TUMPATAN RESIN KOMPOSIT NANOFILLER AKTIVASI LIGHT EMITING DIODE - In Vitro

2015 ◽  
Vol 1 (1) ◽  
pp. 11
Author(s):  
Dhurohmah . ◽  
Rochman Mujayanto ◽  
Siti Chumaeroh
Keyword(s):  
Citric Acid ◽  
Composite Resin ◽  
Distilled Water ◽  
Test Results ◽  
Class V ◽  
Group I ◽  
Significant Difference ◽  
Composite Resin Restoration ◽  
The Difference

Background: The objective of this research is to investigate influence of polishing time and citric acid on microleakage in nanofiller composite resin restoration (Z350XT,3M). Method: The research was conducted on a class V restoration amount sample 24 on bovine teeth. The first group restoration was polished immediately after curing then was soaked in distilled water. The second group was polished immediately after curing and then was soaked in citric acid.The third group was polished after 24 hours of curing and then was soaked in distilled water. The fourth group was polished after 24 hours of curing then was soaked in citric acid. Samples were immersed for 7 days and then were soaked in methylene blue for 1 day and were split longitudinally and were observed using microskopstereo and were measured using calipers. Result: Data were analized by Kruskal-wallis with the result of p > 0,05, there is a significant difference in group I, II, III, and IV. Mann- Whitney test results the difference between the data. Conclusion: The conclution is there were significant differences between the groups which immersed with citric acid of distilled water and there is no significant difference between groups which polished immediately and polished 24 hours later.

Enamel Deproteinization Before Acid Etching and its Effect on the Shear Bond Strength – An in vitro Study

2011 ◽  
Vol 36 (1) ◽  
pp. 19-24 ◽  
Author(s):  
N Harleen ◽  
Y Ramakrishna ◽  
AK Munshi
Keyword(s):  
Bond Strength ◽  
Sodium Hypochlorite ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Enamel Surface ◽  
Acid Etching ◽  
Distilled Water ◽  
Single Bond ◽  
Significant Difference ◽  
Group B

Objective: This study was undertaken to assess the effect of enamel deproteinization with 5.25% sodium hypochlorite (NaOCl) before phosphoric acid (H3PO4) etching on the shear bond strength of Adper™ Single Bond 2 adhesive and Filtek™ Z- 350 XT composite resin . Study design: Forty human sound permanent molars which were extracted for periodontal reasons were used in the experimental protocol as under:Group-A (20 teeth):– A 5X4 mm window of the enamel surface was etched with 37% H3PO4 gel for 15 seconds,washed with distilled water and air dried. A single coat of Adper™ Single Bond 2 adhesive was applied and photo polymerized for 20 seconds and Filtek™ Z- 350 XT composite resin block of length 5mm,width 4mm and height 5mm respectively was built and photo polymerized in increments for 20 seconds each. Group-B (20 teeth):- Similarly the enamel surface was treated with 5.25% NaOCl for 60 seconds, washed with distilled water and then etched with 37% H3PO4 gel for 15 seconds, washed with distilled water and air dried. A single coat of Adper™ Single Bond 2 adhesive was applied and photo polymerized for 20 seconds and Filtek™ Z- 350 XT composite resin block of length 5mm, width 4mm and height 5mm respectively was built and photo polymerized in increments for 20 seconds each. The shear bond strength of all the samples were measured (in MPa) on Instron Mechanical Testing Machine. Results: The mean shear bond strength value for Group-A was 13.51 ± 5.726 MPa and for Group-B being 15.06 ± 6.220 MPa. No statistically significant difference in the shear bond strengths was observed between the two groups. Conclusions:No significant effect of sodium hypochlorite enamel deproteinization on the shear bond strength of Adper™ Single Bond 2 adhesive and Filtek™ Z- 350 XT composite resin before acid etching was observed in this study.

scholarly journals Release and Recharge of Fluoride Ions from Acrylic Resin Modified with Bioactive Glass

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1054
Author(s):  
Zbigniew Raszewski ◽  
Danuta Nowakowska ◽  
Wlodzimierz Wieckiewicz ◽  
Agnieszka Nowakowska-Toporowska
Keyword(s):  
Bioactive Glass ◽  
Dental Materials ◽  
Acrylic Resin ◽  
Microbial Colonization ◽  
Fluoride Ion ◽  
Distilled Water ◽  
Dental Resin ◽  
Ion Release ◽  
Fluoride Ions ◽  
Pmma Resin

Background: Oral hygiene is essential for maintaining residual dentition of partial denture wearers. The dental material should positively affect the oral environment. Fluoride-releasing dental materials help to inhibit microbial colonization and formation of plaque as well as to initiate the remineralization process in the early cavity area. Aim: To evaluate fluoride ion release and recharge capacity, sorption, and solubility of polymethyl methacrylate (PMMA) dental resin modified with bioactive glass addition. Materials and methods: Two bioactive glass materials (5 wt% Kavitan, 10 wt% Kavitan, and 10 wt% Fritex) and pure 10 wt% NaF were added to dental acrylic resin. After polymerization of the modified resins, the release levels of fluoride anions were measured based on color complex formation by using a spectrophotometer after 7, 14, 28, and 35 days of storage in distilled water at 37 °C. Subsequently, specimens were brushed with a fluoride-containing tooth paste on each side for 30 s, and the fluoride recharge and release potential was investigated after 1, 7, and 14 days. Sorption and solubility after 7 days of storage in distilled water was also investigated. Results: The acrylic resins with addition of 10% bioactive glass materials released fluoride ions for over 4 weeks (from 0.14 to 2.27 µg/cm2). The amount of fluoride ions released from the PMMA resin with addition of 10 wt% Fritex glass was higher than that from the resin with addition of 10 wt% Kavitan. The acrylic resin containing 10 wt% NaF released a high amount of ions over a period of 1 week (1.58 µg/cm2), but the amount of released ions decreased rapidly after 14 days of storage. For specimens containing 5 wt% Kavitan glass, the ion-releasing capacity also lasted only for 14 days. Fluoride ion rechargeable properties were observed for the PMMA resin modified with addition of 10 wt% Fritex glass. The ion release levels after recharge ranged from 0.32 to 0.48 µg/cm2. Sorption values ranged from 10.23 μm/mm3 for unmodified PMMA resin to 12.11 μm/mm3 for specimens modified with 10 wt% Kavitan glass. No significant differences were found regarding solubility levels after 7 days. Conclusions: The addition of 10 wt% Fritex and 10 wt% Kavitan bioactive glass materials to heat-cured acrylic resin may improve its material properties, with bioactive fluoride ion release ability lasting for over 4 weeks. The resin modified with 10 wt% Fritex glass could absorb fluoride ions from the toothpaste solution and then effectively release them. Addition of fluoride releasing fillers have a small effect on sorption and solubility increase of the modified PMMA resin. Clinical significance: The addition of bioactive glass may be promising in the development of the novel bioactive heat-cured denture base resin.

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