Comparative Evaluation of Effect of mode of application of Fluoride on Bleached enamel microhardness: An in vitro study (original) (raw)
Related papers
2017
The aim of this study was to investigate the effect of fluoridated and non-fluoridated carbamide peroxide gel on enamel microhardness (Vickers hardness number).60 extracted human premolar teeth were selected. Teeth were divided into 3 groups. Group AControl (no bleaching), Group B(non-fluoridated bleaching agent) group C (fluoridated bleaching agent). All specimen were bleached for 21 days with the respective bleaching agents for 4 hours. Microhardness testing was done on baseline (prior to bleaching) and on 21 st day (post bleaching).Statistical analysis was done by paired t test, and (0.01) is considered as level of significance. After bleaching all samples group B showed decrease in micro-hardness, while microhardness was increased in group C. Enamel microhardness is reduced after bleaching with 16% CP gel, but fluoridated bleaching agent increased the enamel microhardness.
Contemporary Clinical Dentistry, 2015
Aims and Objectives: The purpose of the study was to evaluate and compare the microhardness of enamel after the application of anticay on bleached enamel with fluoride containing and fluoride free bleaching agent. Materials and Methods: Twenty freshly extracted teeth decoronated and divided mesiodistally into two halves were randomly divided into five groups with 10 samples in each group. The enamel surface was treated as follows: Group 1-no treatment, Group 2-fluoride free bleaching agent, Group 3-fluoride containing bleaching agent, and Group 4-fluoride free bleaching agent followed by anticay application. The samples were subjected to indentation to test the microhardness using Vicker's hardness analyzer. Conclusion: Enamel microhardness significantly increased in samples where anticay was used after the application of bleaching agent.
Effect of fluoride-containing bleaching agents on bovine enamel microhardness
Brazilian Journal of Oral Sciences, 2011
Aim: The purpose of this study was to evaluate the effect of 10% carbamide peroxide (10%CP) bleaching agents with different fluoride concentrations on enamel microhardness after induction of artificial caries lesions during pH-cycling model. Methods: Bovine dental enamel blocks with known surface microhardness were subjected to caries lesion induction and another surface microhardness was determined after a demineralization protocol. The enamel blocks were divided into four groups (n=17) and subjected to 12-day pH-cycling. The groups consisted of the following treatments: 1) artificial saliva (control group not subjected to bleaching treatment); 2) 10%CP; 3) 10%CP (with 0.11% fluoride); 4) 10%CP (with 0.5% fluoride). After treatments, the enamel was evaluated using surface microhardness, polarized light microscopy (PLM) and scanning electronic microscopy. The percentage of surface microhardness recovery was determined for each group and analyzed by the Kruskal Wallis and Dunn's tests (a=0.05). The values of lesion depth by PLM were analyzed by ANOVA and Tukey's test (a=0.05). Results: The enamel treated with bleaching gels containing or not fluoride presented lower mineral recovery and higher caries lesion depth than the control group. Conclusions: These data suggest that bleaching procedures on enamel with artificially induced caries lesions should be used with caution even in the presence of fluoride because there was no recovery in the microhardness.
Effect of Fluoride Gels on Microhardness and Surface Roughness of Bleached Enamel
The Open Dentistry Journal, 2014
The effect of bleaching treatments containing added calcium and combined with neutral or acidic fluoride gels on tooth enamel was investigated in vitro through Knoop microhardness (KHN) and surface roughness (SR) measurements. A total of 60 bovine incisors were tested, including 30 for SR measurements and 30 for KHN measurements. The specimens were divided into 12 groups and subjected to a bleaching agent with hydrogen peroxide 35% (Whiteness HP 35% Maxx, FGM) or hydrogen peroxide 35% with calcium (Whiteness HP 35% Blue Calcium, FGM) and a fluoride treatment flugel acidulated phosphate fluoride (APF) or flugel neutral fluoride (NF). Control specimens were submitted to bleaching treatments without fluoride. Microhardness tests were performed using a Knoop indentor. Roughness measurements were obtained using a roughness analyzer. Measurements were obtained before and after treatment. The specimens were stored in distilled water at 37 °C between treatments. The results were analyzed us...
Journal of International Society of Preventive and Community Dentistry
Aim: To compare and evaluate the microhardness of enamel surface after the application of organic fluoride and inorganic fluoride dentifrices. Materials and Methods: Twenty freshly extracted premolars were collected and decoronation of all the teeth was done at cementoenamel junction. The crowns were sectioned mesiodistally into two halves with the help of diamond disc, and then the subsequent forty samples kept in 1% citric acid for the demineralization and divided into two groups by simple randomization, that is, Group A (inorganic sodium fluoride dentifrice) and Group B (organic amine fluoride dentifrice). They were treated using same protocol for 3 min, daily twice for 7 days. Those samples preserved in artificial saliva in between treatment. The enamel surface microhardness evaluated using Vickers hardness test at base level, after demineralization, as well as after remineralization. Statistical analysis of surface microhardness obtained at different stages done by Student's t-test and P < 0.05 was considered statistically significant. Results: The samples which were treated with sodium fluoride (Group A) could not restore the mean microhardness after treatment to that of preoperative level whereas amine fluoride (Group B) treated samples showed a statistically significant increase in mean surface microhardness from baseline. Conclusion: Organic fluoride (amine fluoride) remineralization was more effective in restoring enamel microhardness than inorganic fluoride (sodium fluoride) remineralization.
Effect of Fluoridated Dentifrices on Surface Microhardness of the Enamel of Deciduous Teeth
Dental Research …, 2011
Background:Surface microhardness is a physical property which access the effect of chemical and physical agents on hard tissues of teeth, and a useful way to examine the resistance of fluoride treated enamel against caries. The purpose of this study was to evaluate microhardness of enamel following pH-cycling through demineralization and remineralization using suspensions of dentifrices with different fluoride contents.Methods:In this in vitro study 56 enamel blocks of primary incisors were soaked in demineralizing solution and four dentifrices suspensions including: Crest 1100 ppm F (NaF), Crest 500 ppm F (NaF), Pooneh 500 ppm F (NaF,) and Pooneh without fluoride. The means and percentage changes of surface microhardness in pre-demineralization, after demineralization and remineralization stages in four groups were measured. The findings of four groups in three stages were compared by, ANOVA, Tukey and paired t-tests. (α=0.05)Results:Average surface microhardness changes of Crest 1100 ppm F, was higher than Crest 500 ppm F, Pooneh 500 ppm F, and Pooneh without fluoride. The percentages of surface microhardness recovery for Crest 1100 ppm F, Crest 500 ppm F, Pooneh 500 ppm F, and Pooneh without fluoride were 45.4, 35.4, 28.6, and 23.7 respectively. Demineralization treatment decreased the surface microhardness of enamel (P<0.05) and the surface microhardness recovery in all groups were significant (P<0.0001).Conclusion:Surface microhardness of enamel after remineralization by Crest 1100 ppm F was higher than Crest 500 ppm F, Pooneh 500 ppm F, and Pooneh without fluoride.
Effect of Fluoride Incorporation in Bleaching Agents on Enamel
Alexandria Dental Journal, 2020
INTRODUCTION: Tooth bleaching has proven to be a conservative esthetic solution for tooth discoloration, hydrogen peroxide (HP) is used as an active oxidizing agent for tooth whitening; it can be used either directly or indirectly by chemical reaction from carbamide peroxide (CP). So many patients suffer from discomfort and sensitivity during and after the bleaching procedure. The use of fluoride shows to be beneficial in reducing the adverse effects of bleaching on Enamel. OBJECTIVES: The study was designed to evaluate the effect of fluoride incorporation in bleaching agents on enamel surface properties. MATERIALS AND METHODS: twenty sound human premolars extracted for orthodontic reasons were selected for the study. The selected premolars were randomly divided into 2 equal groups (10 teeth per group) as follows: Study Group I: The teeth were bleached using 10% Carbamide peroxide. Study Group II: The teeth were bleached using 10% CP containing 0.11% fluoride. All the specimens were examined by scanning electron microscopy (SEM) and micro-hardness test. RESULTS: after 14 days erosion pattern was noted in teeth from group 1 while the teeth of group 2 showed milder demineralization, group 1 showed significant decrease in micro-hardness compared to the base line whereas group 2 teeth that were treated with fluoridated bleaching agent showed insignificant reduction in micro-hardness. CONCLUSIONS: incorporation of fluoride in bleaching agents reduces the adverse effects of bleaching on the enamel surface.
The effect of fluoride therapies on the morphology of bleached human dental enamel
Microscopy Research and Technique, 2011
The aim of this in vitro study was to evaluate qualitatively the surface morphology of enamel bleached with 35% hydrogen peroxide (HP) followed by application of fluoridated agents. Forty intact pre molars were randomly distributed into four groups (n 5 10), treated as follows: Group I (control group) remained stored in artificial saliva at 378C, Group II -35% HP; Group III -35% HP 1 acidulated fluoride (1.23%) and Group IV -35% HP 1 neutral fluoride (2%). The experimental groups received three applications of bleaching gel and after the last application all specimens were polished. This procedure was repeated after 7 and 14 days, and during the intervals of applications, the specimens were stored in artificial saliva at 378C. Scanning electron microscopy (SEM) analysis showed superficial irregularities and porosities to varying degrees in bleached enamel compared to control group. Sample evaluation was made by attributing scores, and data were statistically analyzed using Kruskal-Wallis and Dunn tests (P < 0.05). SEM qualitative investigation demonstrated that 35% hydrogen peroxide affected human dental enamel morphology, producing porosities, depressions, and superficial irregularities at various degrees. These morphological changes were higher after the application of 1.23% acidulated fluoride gel. Microsc. Res. Tech. 74:512-516, 2011. V V C
Effect of Fluoridated Dentifrices on Microhardness of Enamel Surface: Invitro Study
Journal of Advanced Oral Research
Background: Background: Toothpastes also called Dentifrices are essential for maintaining the daily oral hygiene routine and is the most readily available thing over the counter. Generally, all the dentifrices have some form of fl uoride and this vast range of products raises the confusion in the eyes of consumers and increases the need to understand dentifrice ingredients and benefi ts, to be able to give patients recommendations on dentifrice use. It is also important to know whether different types of fl uoridated dentifrices have similar, different or no effect on the surface microhardness of enamel. Objective: To evaluate the changes in the enamel surface microhardness following the continuous demineralization and application of various types of dentifrices with and without fl uoride. Methods: The surface microhardness of 12 enamel blocks was checked using Vickers Microindentor. The microhardness was checked at 4 different phases. Enamel specimens were treated with 4 different type of dentifrices and microhardness was checked at the end of tenth day and twentieth day. The collected data was analysed using the statistical software program SPSS © , version 17. Result: There was a Decrease in the enamel microhardness of all the enamel blocks after demineralization phase. The greatest recovery in microhardness after treatment with dentifrices belonged to Stannous Fluoride group. Conclusion: Dentifrices can increase protection of dental enamel against erosive challenges and dental caries by increasing the surface microhardness of the enamel and providing a remineralizing effect.
BMC Oral Health
Background The present study aimed to assess the impact of application of fluoridated- 10% carbamide peroxide (CP) with or without potassium iodide (KI) on silver diamine fluoride (SDF)-treated enamel surface in the primary teeth. Methods After stained-remineralized caries lesions (s-RCLs) creation, 96 teeth were randomly allocated to four experimental groups: Group 1:SDF-treated enamel followed by 8-h/day application of 10% CP for 2 weeks; Group 2: SDF-treated enamel followed by 15-min/day application of 10% CP for 3 weeks; Group 3: SDF + KI-treated enamel followed by 8-h/day application of 10% CP for 2 weeks; and Group 4: SDF + KI-treated enamel followed by 15-min/day application of 10% CP for 3 weeks. Enamel microhardness (EMH) test (n = 12) and spectrophotometric color assessment (n = 12) was performed at four stages: baseline (intact enamel), demineralized enamel, aged remineralized-stained enamel, and after final intervention. Sixteen samples were used for SEM evaluation. Data...