Cross-sectional microhardness of bovine enamel subjected to three paediatric liquid oral medicines: an in vitro study

Soares, Daniela Novaes; Valinoti, Ana Carolina; Pierro, Viviane Santos da Silva; Antônio, Andréa Gonçalves; Maia, Lucianne Cople

doi:10.1007/bf03262882

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…() and Soares et al . () also found higher mineral loss in dental fragments submerged in deionized water when compared with other substances, among them, an antimicrobial agent (clarithromycin). The referred authors suggest that the cariogenic/erosion challenge suffered by the teeth probably occurred because the calcium and phosphate ions in enamel were released due to water subsaturation.…”

Section: Resultsmentioning

confidence: 85%

Antibacterial effect of coffee: calcium concentration in a culture containing teeth/biofilm exposed toCoffea Canephoraaqueous extract

Meckelburg

Pinto

Farah³

et al. 2014

Lett Appl Microbiol

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Significance and Impact of the Study: This study revealed an inhibitory action of Coffea canephora against dental biofilm. This coffee species caused bacterial lysis and consequent release of calcium into the medium. Furthermore, the advantage of coffee as an antibacterial beverage is that it is consumed in a concentrated form (6-10%) as opposed to various medicinal infusions that have shown such effect in vitro and are usually consumed at 1-2%. Therefore, a light roasted C. canephora aqueous extract can be considered as a potential anticariogenic substance. AbstractThis study determined the changes of calcium concentration in a medium containing teeth/biofilm exposed to Coffea canephora extract (CCE). Enamel fragments were randomly fixed into two 24-well polystyrene plates containing BHI. Pooled human saliva was added to form biofilm on fragments. Specimens were divided into treatment groups (G, n = 8 per group) and treated with 50 ll daily for 1 min per week, as follows: G1, 20% CCE; G2, Milli-Q water (negative control); G3, antibiotic (positive control). Six fragments represented the blank control (G4). The calcium content was observed at baseline, 4 and 7 days of treatment by atomic-absorption spectrophotometry. Cross-sectional hardness of enamel was a demineralization indicator. Calcium increased in the medium after 4 and 7 days of treatment in G1 (3Á80 AE 1Á3 mg l À1 and 4Á93 AE 2Á1 mg l À1 , respectively) and G3 (4th day = 5Á7 AE 1Á8 mg l À1 ; 7th day = 6Á7 AE 3Á5 mg l À1 ) (P > 0Á05). Calcium from G2 decreased after 7 days, which was different from G3 (P < 0Á05). The lower calcium content, at the end of the experiment, was represented by G4, 2Á16 AE 0Á2 mg l À1 . The increase in calcium after treatment with CCE is probably due to its antibacterial effect, which caused the bacterial lysis and consequent release of calcium in the medium.

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Section: Resultsmentioning

confidence: 85%

Antibacterial effect of coffee: calcium concentration in a culture containing teeth/biofilm exposed toCoffea Canephoraaqueous extract

Meckelburg

Pinto

Farah³

et al. 2014

Lett Appl Microbiol

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“…Other in vitro studies have also demonstrated that Claritin® may reduce enamel hardness (18)(19)(20) and increase surface roughness (17). In the present study, the varnishes were applied once and removed after 6 h of application to simulate the clinical condition, since the emphasis was allowing the chemical effect of the varnish components, rather than the mechanical protection.…”

Section: Discussionmentioning

confidence: 98%

Fluoride Varnishes against Dental Erosion Caused by Soft Drink Combined with Pediatric Liquid Medicine

et al. 2017

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The present study evaluated the effect of NaF and CPP-ACP/NaF varnishes to reduce erosion produced by soft drink (SD) combined or not with pediatric liquid medicine. Enamel specimens were pre-treated with fluoride varnish, according to the following groups: NaF varnish (Duraphat®) or CPP-ACP/NaF varnish (MI varnish TM ). Two types of erosive cycles were made: by soft drink erosion (SDE) or by pediatric liquid medicine plus soft drink erosion (PLM/SDE). Bovine enamel specimens were randomly assigned in six groups (n=10): G1=NaF + SDE; G2=CPP-ACP/NaF + SDE; G3=Distilled and deionized (DD) water + SDE; G4=NaF + PLM/SDE; G5=CPP-ACP/NaF + PLM/SDE and G6=DD water + PLM/SDE. Before treatments, the sample surface was divided in two areas (unexposed area-UA and exposed area-EA). The specimens were evaluated by 3D non-contact profilometry technique to determinate tooth structure loss (TSL) and surface roughness (Sa). Scanning electron microscopy (SEM) analysis was also performed. After SDE, G2 presented the lowest TSL values compared to G3 (p=0.008). G1 and G2 did not differ between them (p=0.203) and no groups differed among them despite Sa. Regarding TSL and Sa, G4 and G5 differed from G6 (p=0.0001), but not between them (p=1.00). Examining 3D and SEM images, the greatest differences between UA and EA were observed for G3 and G6. CPP-ACP/ NaF varnish seems to be a promising treatment to reduce enamel loss from the erosion produced by a soft drink. Both varnishes also showed capacity to reduce TSL and Sa after erosion by soft drink combined to pediatric liquid medicine.

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“…It is worth noting that from a depth of 120 µm, the bleaching agent, as well as the demineralizing solution, had no influence on CSH, possibly because of the distance to the outer surface (22). Another important factor to be observed is the change of the product pH.…”

Section: Discussionmentioning

confidence: 99%

Demineralization and Hydrogen Peroxide Penetration in Teeth with Incipient Lesions

et al. 2015

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The aim of this study was to evaluate the demineralization and hydrogen peroxide (HP) penetration in teeth with incipient lesions submitted to bleaching treatment. For analysis of HP penetration, sound and demineralized enamel/dentin discs were placed in artificial pulp chambers containing acetate buffer solution. After bleaching treatment, this solution was subjected for analysis of optical density by spectrophotometry and the disc surfaces were analyzed with scanning electron microscopy (SEM) and polarized light microscopy (PLM). The remaining discs were subjected for cross-sectional hardness analysis at different depths. Data were analyzed by repeated measures ANOVA and PLSD Fisher test (a=0.05). It was observed that previously demineralized teeth showed greater HP penetration (p<0.05). The bleaching treatment caused changes to a depth of 20 µm in sound enamel and up to 90 µm in demineralized enamel. SEM and PLM images revealed that the bleaching treatment caused superficial changes that were considerably more accentuated in previously demineralized teeth. It may be concluded that the enamel mineralization level influences HP penetration and the bleaching agent contributed to increase the demineralization depth.

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Cross-sectional microhardness of bovine enamel subjected to three paediatric liquid oral medicines: an in vitro study

Abstract: Antibiotic G1 (Klaricid®) presented an in vitro protective effect against acid attacks probably due to its mineral content and viscosity.

Cited by 8 publications

References 21 publications

Antibacterial effect of coffee: calcium concentration in a culture containing teeth/biofilm exposed toCoffea Canephoraaqueous extract

Antibacterial effect of coffee: calcium concentration in a culture containing teeth/biofilm exposed toCoffea Canephoraaqueous extract

Fluoride Varnishes against Dental Erosion Caused by Soft Drink Combined with Pediatric Liquid Medicine

Demineralization and Hydrogen Peroxide Penetration in Teeth with Incipient Lesions

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