Effect of Plaque Fluoride Released from a Glass-Ionomer Cement on Enamel Remineralization in situ

Yamamoto, K.; Arai, Koji Y.; Fukazawa, Kaori; Fukui, K.; Nagamatsu, Kumiko; Kato, Kazúo; Nakagaki, Haruo; Robinson, C.

doi:10.1159/000083163

Cited by 21 publications

(23 citation statements)

References 31 publications

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“…All materials tested in this study have shown a potential for dentin remineralization in previous investigations. 17,19,34 However, under the conditions of this study, significant positive mechanical property changes could only be observed after immersion in simulated oral fluid under nonlined and bioactive glass-filled microcavity sites, whereas the other materials showed no effect. No dentin hardening was observed in samples stored in deionized water, indicating a lack of direct lining material effects.…”

Section: Discussioncontrasting

confidence: 52%

Comparative assessment of hardening of demineralized dentin under lining materials using an ultramicroindentation system

et al. 2007

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The aim of the current in vitro study was to evaluate the influence of three lining materials with a reported mineralizing capacity on hardness and elasticity of demineralized dentin. Four standardized microcavities were prepared in exposed dentin surfaces of 16 extracted human molars each. Dentin was demineralized in 0.5M EDTA for 2 h. One microcavity was left empty. The others were filled with a resin-modified glass ionomer cement (RMGIC), a bioactive glass S53P4 suspension, and a prototype Ca-PO(4) cement. Teeth were then immersed in deionized water or simulated oral fluid. After 3 weeks, hardness and composite elastic modulus of the dentin subjacent to the microcavities were assessed under wet conditions using the ultramicroindentation system (UMIS). After immersion in deionized water, there was no significant improvement of the mechanical properties of dentin irrespective of the material applied beforehand, indicating a lack of direct material effects. Exposure to simulated oral fluid resulted in significantly (p < 0.05) higher hardness and composite elastic modulus values of the dentin subjacent to empty microcavities and counterparts lined with bioactive glass compared to corresponding dentin under the RMGIC. UMIS profiles showed little variance.

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Section: Discussioncontrasting

confidence: 52%

Comparative assessment of hardening of demineralized dentin under lining materials using an ultramicroindentation system

et al. 2007

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“…[35][36][37][38] One possible explanation may be due to experimental differences used in these studies. Tenuta et al 36 employed a short-term in situ model, which, in our opinion, may have overestimated the favorable effects of glass ionomers because fluoride release tends to be higher in the period immediately following placement of fresh material.…”

Section: Discussionmentioning

confidence: 99%

“…6 Similarly, Amaral et al 38 have used glass ionomer cement for sealing pits and fissures, presenting different characteristics. Furthermore, Benelli et al 35 and Yamamoto et al 37 have tested the materials without the added use of any kind of fluoride-containing toothpaste. Therefore, it may be suggested that fluoride release from restorative materials may not be necessary to prevent secondary caries in human enamel when fluoridated dentifrice is frequently used, 4 since salivary fluoride concentrations after insertion of different fluoride-releasing restorative materials are lower when compared to fluoride concentrations observed immediately after brushing with fluoride dentifrices.…”

Section: Discussionmentioning

confidence: 99%

In situ effects of restorative materials on dental biofilm and enamel demineralisation

Sousa

Zanin

Lima

et al. 2009

Journal of Dentistry

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“…Forty dentine slabs were excluded as a result of higher hardness numbers, and therefore 120 dentine slabs were used. Finally, the slabs were autoclaved (121°C, 15 min) (41) and stored in 100% humidity until being inserted into the palatal appliances ( Fig. 2A).…”

Section: Specimen Preparationmentioning

confidence: 99%

Evaluation of the antimicrobial effect of photodynamic antimicrobial therapy in an in situ model of dentine caries

Lima

Melo

Borges

et al. 2009

European J Oral Sciences

139

108

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Photodynamic antimicrobial therapy (PACT) promotes bacterial death as a result of the photosensitization of microbial components. This study evaluated the effect of PACT on dentine caries produced in situ. Over the course of 14 d, 20 volunteers wore intra-oral devices containing human dentine slabs that were treated 10 times daily with a 40% sucrose solution. Afterwards, the antimicrobial effect of toluidine blue O, associated with 47 or 94 J cm(-2) of a light-emitting diode, was evaluated. Before and after the treatments, dentine samples were analysed with regard to the total number of microorganisms, total streptococci, mutans streptococci, and lactobacilli. Significant reductions in the bacterial count were observed for PACT with both energy densities tested, with the following values observed for 47 and 94 J cm(-2) of irradiation: for total streptococci, 3.45 and 5.18; for mutans streptococci, 3.08 and 4.16; for lactobacilli, 3.24 and 4.66; and for total microorganisms, 4.29 and 5.43, respectively. The control, treated with 94 J cm(-2) of irradiation alone, was also effective against all bacteria. To conclude, PACT was effective in killing oral microorganisms present in dentine caries produced in situ and may be a useful technique for eliminating bacteria from dentine carious lesions before restoration.

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Effect of Plaque Fluoride Released from a Glass-Ionomer Cement on Enamel Remineralization in situ

Cited by 21 publications

References 31 publications

Comparative assessment of hardening of demineralized dentin under lining materials using an ultramicroindentation system

Comparative assessment of hardening of demineralized dentin under lining materials using an ultramicroindentation system

In situ effects of restorative materials on dental biofilm and enamel demineralisation

Evaluation of the antimicrobial effect of photodynamic antimicrobial therapy in an in situ model of dentine caries

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