scholarly journals Protective Effects of GIC and S-PRG Filler Restoratives on Demineralization of Bovine Enamel in Lactic Acid Solution

2020 ◽  
Author(s):  
Naoyuki Kaga ◽  
Futami Nagano-Takebe ◽  
Takashi Nezu ◽  
Takashi Matsuura ◽  
Kazuhiko Endo ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acid Solution ◽  
Glass Ionomer Cement ◽  
Protective Effects ◽  
Glass Ionomer ◽  
Lactic Acid Solution ◽  
Ca Ions ◽  
Ph Neutralization ◽  
Bovine Enamel ◽  
Dental Restorative

We investigated the protective effects of glass ionomer cement (GIC) and surface pre-reacted glass ionomer (S-PRG) fillers used as dental restorative materials on the demineralization of bovine enamel during the incubation in a lactic acid solution with pH = 4.0 conducted for 6 d at a temperature of 37 °C. Scanning electron microscopy images of the specimen surfaces from the group containing only enamel blocks revealed the presence of apparent enamel prism peripheries after 6 d of treatment. The mineral was etched from the enamel surface, and a large number of Ca ions were detected in solution. In contrast, the enamel blocks incubated together with discs of GIC or S-PRG fillers did not exhibit demineralized surfaces, owing to the neutralization of the acid solution by the fillers within the first 3 h of the incubation process. The observed pH neutralization effect was attributed to the release of different ions from the fillers and could be utilized for suppressing the progression of caries.

scholarly journals Protective Effects of GIC and S-PRG Filler Restoratives on Demineralization of Bovine Enamel in Lactic Acid Solution

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2140 ◽  
Author(s):  
Naoyuki Kaga ◽  
Futami Nagano-Takebe ◽  
Takashi Nezu ◽  
Takashi Matsuura ◽  
Kazuhiko Endo ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acid Solution ◽  
Glass Ionomer Cement ◽  
Protective Effects ◽  
Glass Ionomer ◽  
Solution Ph ◽  
Lactic Acid Solution ◽  
Barrier Coat ◽  
Ph Neutralization ◽  
Bovine Enamel

This study was aimed at investigating the protective effects of glass ionomer cement (GIC) and surface pre-reacted glass ionomer (S-PRG) fillers used as dental restorative materials on demineralization of bovine enamel. GlasIonomer FX ULTRA (FXU), Fuji IX GP Extra (FIXE), CAREDYNE RESTORE (CDR) were used as GICs. PRG Barrier Coat (BC) was used as the S-PRG filler. They were incubated in a lactic acid solution (pH = 4.0) for six days at a temperature of 37 °C. The mineral was etched from the enamel surface, and a large number of Ca and P ions were detected in solution. The Al, F, Na, Sr, and Sr ions were released in GICs and S-RPG fillers. The Zn ion was released only in CDR and the B ion was released only in BC. The presence of apparent enamel prism peripheries was observed after six days of treatment for the group containing only enamel blocks. pH values for the FXU, FIXE, CDR, BC, and enamel block groups after six days were 6.5, 6.6, 6.7, 5.9, and 5.1, respectively. Therefore, the observed pH neutralization effect suppressed progression of caries due to the release of several ions from the restoratives.

Effect of Pre-reacted Glass-ionomer Filler Extraction Solution on Demineralization of Bovine Enamel

2014 ◽  
Vol 39 (2) ◽  
pp. 159-165 ◽  
Author(s):  
K Asano ◽  
R Kawamoto ◽  
M Iino ◽  
T Fruichi ◽  
K Nojiri ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acid Solution ◽  
Artificial Saliva ◽  
Ultrasonic Waves ◽  
Ultrasound Measurement ◽  
Propagation Time ◽  
Glass Ionomer ◽  
Lactic Acid Solution ◽  
Bovine Enamel ◽  
Transmission Velocity

SUMMARY Objective To determine the effect of pre-reacted glass-ionomer (PRG) filler extraction solution on the demineralization of bovine enamel by measuring changes in the ultrasound transmission velocity. Methods The specimens were prepared by cutting bovine teeth into enamel blocks. The specimens were immersed in buffered lactic acid solution for 10 minutes twice a day, and then stored in artificial saliva. Other specimens were stored in PRG filler extraction solution for 10 minutes, followed by 10-minute immersion in the buffered lactic acid solution twice a day. The propagation time of longitudinal ultrasonic waves was measured by a pulser receiver. Six specimens were used for each condition, and analyses of variance followed by Tukey tests (α=0.05) were done. Results No changes in sonic velocity were found for specimens stored in the PRG filler extraction solution, indicating that the PRG extraction solution had an effect on inhibiting the demineralization of bovine enamel. Conclusions The results obtained with the use of an ultrasound measurement technique suggested that PRG filler extraction solution has the ability to prevent demineralization of enamel.

scholarly journals In vitro interactions between lactic acid solution and art glass-ionomer cements

2009 ◽  
Vol 17 (4) ◽  
pp. 274-279 ◽  
Author(s):  
Linda Wang ◽  
Daniela Francisca Gigo Cefaly ◽  
Janaína Lima dos Santos ◽  
Jean Rodrigo dos Santos ◽  
José Roberto Pereira Lauris ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acid Solution ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Lactic Acid Solution ◽  
In Vitro Interactions

scholarly journals A study on highly concentrated lactic acid and the synthesis of lactide from its solution

2021 ◽  
pp. 174751982110210
Author(s):  
Xiaolong Xu ◽  
Lijuan Liu
Keyword(s):  
Lactic Acid ◽  
Acid Solution ◽  
Concentration Distribution ◽  
Raw Material ◽  
High Concentration ◽  
Composition Distribution ◽  
Lactic Acid Solution ◽  
H Nmr ◽  
Back Titration ◽  
Condensed Water

Lactic acid is an important platform compound used as raw material for the production of lactide and polylactic acid. However, its concentration and composition distribution are not as simple as those of common compounds. In this work, the mass concentration distribution of highly concentrated lactic acid is determined by back titration. The components of highly concentrated lactic acid, crude lactide, and polymer after the reaction are analyzed by HPLC. Different concentrations of lactic acid solution were prepared for the synthesis of lactide and its content in the product was determined by 1H NMR analysis. We found that lactide is more easily produced from high-concentration lactic acid solution with which the condensed water is easier to release. Hence, the removal of condensed water is crucial to the formation of lactide, although it is not directly formed by esterification of two molecules of lactic acid.

Storage of polyacid-modified resin composites (“compomers”) in lactic acid solution

1999 ◽  
Vol 15 (6) ◽  
pp. 413-416 ◽  
Author(s):  
J.W. Nicholson ◽  
B.J. Millar ◽  
B. Czarnecka ◽  
H. Limanowska-Shaw
Keyword(s):  
Lactic Acid ◽  
Acid Solution ◽  
Resin Composites ◽  
Lactic Acid Solution ◽  
Modified Resin

scholarly journals THE EFFECT OF LACTIC ACID AND ARTIFICIAL SALIVA SOLUTION IMMERSION TO THE RELEASE OF CALCIUM IONS ON BIOACTIVE RESIN

2021 ◽  
Vol 6 (2) ◽  
pp. 190
Author(s):  
Dewi Puspitasari ◽  
Nurah Tajjalia ◽  
Diana Wibowo ◽  
Agung Satria Wardhana
Keyword(s):  
Lactic Acid ◽  
Acid Solution ◽  
Calcium Ions ◽  
Calcium Ion ◽  
Artificial Saliva ◽  
Distilled Water ◽  
Acid Condition ◽  
Ion Release ◽  
Lactic Acid Solution ◽  
Solution Increase

Background: Bioactive resin can release calcium ions when contact with solution media, even in acid condition. In the oral cavity, pH may change into acid condition due to the metabolic results of Streptococcus mutans. The bacteria metabolize carbohydrates into organic acids, one of which is lactic acid. Purpose: Analyze the effect of lactic acid solution and artificial saliva on the number of the release of calcium ions of bioactive resin. Methods: Forty-two specimens (diameter 15 mm x thickness 1 mm; n= 7/group fabricated with Activa™ Bioactive Restorative (Pulpdent). The specimens that meet the criteria were divided into 6 groups. The specimen was immersed for 1 and 7 days in the incubator at 37oC. The number of calcium ion release is measured using titration method. Results: Two Way Anova test and Post Hoc Bonferonni test showed there were significant differences among all group for lactic acid 1 day (4.040 ± 0.360) µg, artificial saliva 1 day (0.640 ± 0.338) µg, distilled water 1 day (1.040 ± 0.504) µg, lactic acid 7 days (5.400 ± 0.312), artificial saliva 7 days (1.640 ± 0.215) µg, distilled water 7 days (3.520± 0.356 µg). Conclusion: There was an influence of lactic acid and artificial saliva on the number of calcium ion releases of bioactive resin. Immersion of bioactive resin in the lactic acid solution increase the calcium ion releases and artificial saliva decrease the calcium ion release compared to distilled water. Keywords: artificial saliva, bioactive resin, calcium ion release, lactic acid

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