The Effect of Hydroxyapatite on the Remineralization of Dental Fissure Sealant

Park, S.W.; Lee, Yong Keun; Kim, Yeon Ung; Kim, Min Chul; Kim, Kyoung Nam; Choi, Byung-Jai; Choi, Hyung Jun

doi:10.4028/www.scientific.net/kem.284-286.35

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…These zones were resultant from the precipitation of Ca, P and F into HA in these areas. These findings were in accordance with Park et al, [ 15 ] and Choudhary et al [ 23 ]. Both studies concluded that these zones were remineralization zones because there were no similar signs in the control group.…”

Section: Discussionsupporting

confidence: 93%

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Effect of a bioactive pit and fissure sealant on demineralized human enamel: in vitro study

Salma

AbdElfatah

2022

BMC Oral Health

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Background Incorporation of bioactive agent into pit and fissure sealant would halt demineralization and promote further remineralization. The aim was to assess the effect of bioactive and fluoride fissure sealants on calcium and phosphate content and surface topography of artificially demineralized enamel in young permanent teeth. Methods 30 sound extracted premolars free from cracks or any developmental anomalies were used. They were divided into group I bioactive fissure sealant, group II fluoride fissure sealant and group III no material applied. Each tooth was divided into halves in a buccolingual direction and evaluated by energy dispersive X-ray spectrometer (EDX) at baseline, demineralization and after applying the material. Another set of 7 sound extracted premolars was evaluated by scanning electron microscopy (SEM) at the same phases. Results EDX showed that regaining calcium to demineralized enamel was significantly higher with bioactive sealant than either fluoride or the control group. SEM revealed minerals deposits with formation of distinct white zone at tooth/sealant interface for both pit and fissure sealant groups. Whereas no white zone formation was detected in control group. Conclusions Incorporating bioactive material into pit and fissure sealant through microcapsules provided better results than incorporating fluoride by enhancing the biological process of remineralization. Clinical relevance: The more use of bioactive pit and fissure sealant would maintain the occlusal surfaces as sound structures and decrease the need for operative procedures to restore teeth cavitation.

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Section: Discussionsupporting

confidence: 93%

“…The qualitative changes at the tooth surface and at the tooth/sealant interface were observed at all designated stages for all groups as previously mentioned. The presence of either granular, globular or white zones at the interface was considered positive for remineralization [ 15 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of a bioactive pit and fissure sealant on demineralized human enamel: in vitro study

Salma

AbdElfatah

2022

BMC Oral Health

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“…There was no synergistic effect of fluoride on remineralization in this vitro study. It was expected that the remineralization effect would be more pronounced when the fluoride ions of the toothpaste interact with calcium and phosphate ions in saliva [7]. Therefore, a future study will evaluate the synergic effect of fluoride by adding calcium and phosphate ions into the tooth slurry.…”

Section: Resultsmentioning

confidence: 99%

Remineralization Potential of New Toothpaste Containing Nano-Hydroxyapatite

Jeong

Jang

Kim

et al. 2006

KEM

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Hydroxyapatite is the main component of enamel that gives the tooth a bright white appearance and eliminates the diffused reflection of light by filling up the fine pores of the tooth surface. Accordingly, remineralization of the teeth can be expected to some extent if hydroxyapatite is used to treat an incipient caries lesion (early white spot lesion). In addition, the remineralization effect will be increased if the particle size of hydroxyapatite can be reduced to less than that of the micron-size in existing toothpaste preparations. The aim of this in vitro study was to evaluate the effect of nano-hydroxyapatite toothpaste, which was produced by nano-technology, on the remineralization of human enamel. A tooth specimen, on which artificial incipient caries had been induced, was immersed into two toothpaste slurries for remineralization. One contains nano-sized hydroxyapatite and fluoride, and the other contains nano-sized hydroxyapatite excluding fluoride. In order to evaluate the remineralization effect, the Vickers Hardness Number & SEM image of the enamel surface was evaluated at each step. There were significant differences in VHN values between those obtained before and after the remineralization steps. The results showed that the remineralization effect increased with increasing immersing time (P<0.05). However, there were no significant differences in VHN values between the two groups (P>0.05). SEM also demonstrated differences the in micro surface at each step. In conclusion, a toothpaste containing nano-sized hydroxyapatite has the potential to remineralize an incipient caries lesion. In addition, the addition of fluoride had no synergistic effect on remineralization.

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Effect of hydroxyapatite spheres, whiskers, and nanoparticles on mechanical properties of a model BisGMA/TEGDMA composite initially and after storage

et al. 2013

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This study investigated the effect of shape, size, and surface modification of hydroxyapatite (HAP) fillers on the degree of conversion (DC) and mechanical properties of a model BisGMA/TEGDMA composite initially and after 4 weeks of storage. Ten percent of conventional glass fillers were replaced by HAP spheres (Sph), silicon-doped spheres (SphSi), whiskers (Wh), silicon-doped whiskers (WhSi), and nanosized HAP particles (Nano). Spheres were specifically structured agglomerates consisting of a central void and radially orientated primary particles, whereas whiskers were compact monocrystals. DC, Vickers hardness (HV), flexural strength (Fs), flexural modulus (Ef), compressive strength (Cs), and compressive modulus (Ec) were tested. There were no significant differences in the DC between all tested groups. HV decreased by 5.4-17% with the addition of HAP, while Fs increased by 13.9-29% except in Nano group (decrease by 13%). After storage, Sph and SphSi groups showed similar HV, Ef, Cs and Ec and higher Fs than the control. The fracture mode of HAP spheres was through the central void whereas whiskers showed longitudinal delamination, transverse, and mixed fractures. HAP spheres with or without silicon- doping have a potential to be part of the filler content of dental composites.

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The Effect of Hydroxyapatite on the Remineralization of Dental Fissure Sealant

Cited by 3 publications

References 5 publications

Effect of a bioactive pit and fissure sealant on demineralized human enamel: in vitro study

Effect of a bioactive pit and fissure sealant on demineralized human enamel: in vitro study

Remineralization Potential of New Toothpaste Containing Nano-Hydroxyapatite

Effect of hydroxyapatite spheres, whiskers, and nanoparticles on mechanical properties of a model BisGMA/TEGDMA composite initially and after storage

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