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Mendes Soares IP, Anselmi C, Fernandes LDO, Peruchi V, de Lima CM, Pires MLBA, Ribeiro RADO, de Souza Costa CA, Hebling J. Transdentinal effects of S-PRG fillers on odontoblast-like cells. Dent Mater 2024:S0109-5641(24)00134-9. [PMID: 38871524 DOI: 10.1016/j.dental.2024.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 05/29/2024] [Accepted: 06/03/2024] [Indexed: 06/15/2024]
Abstract
OBJECTIVES To investigate the transdentinal effects of surface reaction-type pre-reacted glass-ionomer (S-PRG) fillers on odontoblast-like cells. METHODS An eluate of S-PRG fillers was obtained by dissolving the particles in distilled water (1:1 m/v). Dentin discs with similar permeability were mounted into artificial pulp chambers and MDPC-23 cells were seeded on their pulpal surface. The occlusal surface was treated with (n = 10): ultrapure water (negative control - NC), hydrogen peroxide (positive control - PC), S-PRG eluate exposure for 1 min (S-PRG 1 min), or S-PRG filler eluate exposure for 30 min (S-PRG 30 min). After 24 h, cell viability (alamarBlue) and morphology (SEM) were evaluated. The extract obtained from transdentinal diffusion was applied to MDPC-23 pre-cultured in plates for another 24 h to evaluate viability (alamarBlue, 1, 3, and 7 days), gene expression of Col1a1, Alpl, Dspp, and Dmp1 (RT-qPCR, 1 and 7 days), and mineralization (Alizarin Red, 7 days). Data were analyzed with ANOVA (α = 5 %). RESULTS While S-PRG 1 min did not differ from NC, S-PRG 30 min reduced 17.9 % viability of cells from discs. S-PRG treatments resulted in low cell detaching from dentin, and the remaining cells exhibited typical morphology or minor cytoplasmic contraction. S-PRG 30 min slightly increased cell viability (6 %) 1 day after contact with the extract. S-PRG treatments upregulated the expression of the investigated genes, especially after 1 day. S-PRG 30 min stimulated mineralization activity by 39.7 %. CONCLUSIONS S-PRG filler eluate does not cause transdentinal cytotoxicity on odontoblast-like cells, and long-term exposure can stimulate their dentinogenic-related mineralization activity. SIGNIFICANCE The transdentinal elution of ions from S-PRG fillers is not expected to be harmful to the dental pulp and may exert bioactive effects by inducing dentin matrix deposition through the metabolism of underlying odontoblasts.
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Affiliation(s)
- Igor Paulino Mendes Soares
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araraquara, Brazil
| | - Caroline Anselmi
- Department of Morphology, Orthodontics, and Pediatric Dentistry, São Paulo State University (UNESP), School of Dentistry, Araraquara, Brazil
| | - Lídia de Oliveira Fernandes
- Department of Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araraquara, Brazil
| | - Victoria Peruchi
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araraquara, Brazil
| | - Caroline Meronha de Lima
- Department of Morphology, Orthodontics, and Pediatric Dentistry, São Paulo State University (UNESP), School of Dentistry, Araraquara, Brazil
| | - Maria Luiza Barucci Araujo Pires
- Department of Morphology, Orthodontics, and Pediatric Dentistry, São Paulo State University (UNESP), School of Dentistry, Araraquara, Brazil
| | - Rafael Antonio de Oliveira Ribeiro
- Department of Morphology, Orthodontics, and Pediatric Dentistry, São Paulo State University (UNESP), School of Dentistry, Araraquara, Brazil
| | | | - Josimeri Hebling
- Department of Morphology, Orthodontics, and Pediatric Dentistry, São Paulo State University (UNESP), School of Dentistry, Araraquara, Brazil.
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Tatsumi Y, Kawaki H, Shintani K, Ueno K, Hotta M, Kondoh N, Burrow MF, Nikaido T. Bioactivity of human dental pulp-derived stem cells with boron-controlled S-PRG filler eluate by anion exchange. Dent Mater J 2024; 43:255-262. [PMID: 38432951 DOI: 10.4012/dmj.2023-145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Surface pre-reacted glass-ionomer (S-PRG) filler is a bioactive glass filler capable of releasing various ions. A culture medium to which was added an S-PRG filler eluate rich in boron was reported to enhance alkaline phosphatase (ALP) activity in human dental pulp-derived stem cells (hDPSC). To clarify the role of boron eluted from S-PRG fillers, the modified S-PRG filler eluate with different boron concentrations was prepared by using an anion exchange material. Therefore, elemental mapping analysis of anion exchange material, adsorption ratio, hDPSCs proliferation and ALP activity were evaluated. For statistical analysis, Kruskal-Wallis test was used, with statistical significance determined at p<0.05. ALP activity enhancement was not observed in hDPSC cultured in the medium that contained the S-PRG filler eluate from which boron had been removed. The result suggested the possibility that an S-PRG filler eluate with controlled boron release could be useful for the development of novel dental materials.
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Affiliation(s)
- Yusuke Tatsumi
- Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, Asahi University School of Dentistry
| | - Harumi Kawaki
- Department of Oral Biochemistry, Division of Oral Structure, Function, and Development, Asahi University School of Dentistry
| | - Kohei Shintani
- Department of Dental Materials Science, Division of Oral Functional Science and Rehabilitation, Asahi University School of Dentistry
| | - Kyohei Ueno
- Department of Oral Biochemistry, Division of Oral Structure, Function, and Development, Asahi University School of Dentistry
| | | | - Nobuo Kondoh
- Department of Chemistry, Division of Dental Basic Education, Asahi University School of Dentistry
| | - Michael F Burrow
- Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital
| | - Toru Nikaido
- Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, Asahi University School of Dentistry
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Dimopoulou E, Baysan A. Effect of topical applications containing surface pre-reacted glass-ionomer filler on dental hard tissues-A systematic review. J Dent 2024; 147:104904. [PMID: 38442802 DOI: 10.1016/j.jdent.2024.104904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 02/06/2024] [Accepted: 02/26/2024] [Indexed: 03/07/2024] Open
Abstract
OBJECTIVES The objective of this systematic review was to assess the efficacy of topical applications containing surface pre-reacted glass-ionomer filler on dental hard tissues. DATA SOURCES A comprehensive literature search was conducted in PubMed, MEDLINE, Embase, Scopus, ClinicalTrials.gov, Lilacs and Cochrane Central Register of Controlled Trials (until 15.08.2022). Google and Open Grey were used to search for grey literature and handsearching was conducted. STUDY SELECTION Clinical and in vitro studies conducted on human adult teeth were considered eligible without date and language restrictions. The electronic database generated 2,488 results. In total, 227 studies were found to be relevant from which 71 duplicates were removed. Title and abstract screening were then conducted, and a total of 33 studies met the inclusion criteria were assessed for full text screening. Two authors concluded that 11 studies satisfied the eligibility criteria. In vitro studies were evaluated using an accepted quality assessment tool for dental studies. Cochrane risk of bias tool was used for quality assessment of clinical randomised studies, whilst ROBINS-I tool was used for non-randomised studies. RESULTS Nine in vitro and only two non-randomised clinical trials were reported to meet the eligibility criteria. Results were grouped and analysed separately according to the study design. Different modes of surface pre-reacted glass-ionomer filler delivery were reported in the included studies. Three studies tested the effect of surface pre-reacted glass-ionomer filler containing toothpastes, whilst three studies investigated the effect of polishing pastes with surface pre-reacted glass-ionomer filler, three studies used eluates as surface pre-reacted glass-ionomer filler delivery method and two studies reported the effect of the coatings. The effect of those vehicles was tested on enamel, dentine or oral biofilm. Each study was analysed individually, and heterogeneity was detected among in vitro and clinical studies. Half of the in vitro studies were medium risk, whilst three were low and two studies presented with high risk. In clinical trials, outcome, confounding, selection biases were reported. Meta-analysis was therefore unable to be carried out. CONCLUSION Regardless of the mode of delivery and type of studies, all included studies demonstrated the efficacy of surface pre-reacted glass-ionomer filler containing topical applications to inhibit demineralisation of dental hard tissues at a dose dependant manner. Antimicrobial properties towards cariogenic species were also reported. CLINICAL SIGNIFICANCE Surface pre-reacted glass-ionomer filler containing topical applications may serve as potential caries preventive and cariostatic tools. The systematic review registered in PROSPERO, International prospective register of systematic reviews, No. CRD42022347130.
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Affiliation(s)
- Eleni Dimopoulou
- Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Aylin Baysan
- Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.
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Hiraishi N, Gondo T, Shimada Y, Hayashi F. Effect of borate, fluoride and strontium ions on biomimetic nucleation of calcium phosphate studied using solid-state nuclear magnetic resonance and X-ray diffraction. Dent Mater 2024; 40:210-218. [PMID: 37977993 DOI: 10.1016/j.dental.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 10/31/2023] [Accepted: 11/04/2023] [Indexed: 11/19/2023]
Abstract
OBJECTIVES Apatite minerals can have various anions and cations in their crystal structure in addition to phosphate ion (PO₄³⁻) and calcium ion (Ca2+). The aim of this study is to investigate effects of the borate, fluoride and strontium ions on biomimetic nucleation of calcium phosphate. METHODS Nano-crystalline hydroxyapatite (H-Ap) was obtained from a supersaturated buffered solution containing 4.12 mM HPO42- and 5.88 mM Ca2+ (H-Ap). Four additives were used in solid solution methods: (i) 0.588 mM F- (F-Ap), (ii) 5.88 mM Sr2+ (Sr-Ap), (iii) 4.12 mM BO33- (BO3-Ap), and (iv) a surface pre-reacted glass ionomer (S-PRG) filler eluate that contained 0.17 mM Sr2+, 0.588 mM F-, 11.1 mM BO33-- (SPRG-Ap). Apatite crystallization was investigated using a solid-state magic-angle spinning NMR spectroscopy and X-ray diffraction (XRD) with the Rietveld analysis. RESULTS A 2D 1H-31P heteronuclear-correlation NMR showed F- ion incorporation in the apatite structure of the F-Ap and SPRG-Ap. The peaks on the 31P axis of the F-Ap, Sr-Ap, and BO3-Ap were different from that of the H-Ap, and the full width at half maximum increased in the following order: H-Ap∼F-Ap∼BO3-Ap< SPRG-Ap< Sr-Ap, suggesting the incorporation of the F-, Sr2+ and BO33-. The incorporation of F and BO3 was further confirmed by 19F and 11B NMR. The XRD revealed that Sr2+ was preferentially incorporated into the CaII site. SIGNIFICANCE The F-, Sr2+ and BO33-ions might be involved in modifying the crystallization of apatite precipitation, producing a variety of apatite. S-PRG filler that release these ions may have an effect on remineralization, i.e., the reformation of apatite lost due to caries.
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Affiliation(s)
- Noriko Hiraishi
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Tadamu Gondo
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yasushi Shimada
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Fumiaki Hayashi
- NMR Operation Team, Laboratory for Advanced NMR Application and Development, RIKEN Center for Biosystems Dynamics Research, Yokohama, Japan
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Hirose M, Murata Y, Fukuda A, Fujita Y, Yahata S, Kaji M, Saitoh M. Salivary fluoride concentrations following toothbrushing with experimental toothpaste containing surface pre-reacted glass-ionomer (S-PRG) filler. Clin Oral Investig 2023; 27:4433-4446. [PMID: 37285102 DOI: 10.1007/s00784-023-05063-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 05/07/2023] [Indexed: 06/08/2023]
Abstract
BACKGROUND Single-blind 9 case comparative studies were conducted to evaluate salivary fluoride concentrations following toothbrushing using experimental toothpaste containing surface pre-reacted glass-ionomer (S-PRG) fillers. Preliminary tests were conducted in order to determine the volume of usage as well as the concentrations (wt %) of S-PRG filler. Based on the results given these experiments, we compared the salivary fluoride concentrations following toothbrushing with 0.5 g of 4 different types of toothpastes: 5 wt % S-PRG filler, 1400 ppm F AmF (amine fluoride), 1500 ppm F NaF (sodium fluoride), and MFP (monofluorophosphate) containing toothpaste. METHODS Of the 12 participants, 7 participated in the preliminary study and 8 in the main study. All participants brushed their teeth using the scrubbing method for 2 min. At first, 1.0 and 0.5 g of 20 wt % S-PRG filler toothpastes were used to compare, then followed by 0.5 g of 0 (control), 1, and 5 wt % S-PRG toothpastes, respectively. The participants spat out once and rinsed with 15 mL of distilled water for 5 s. Saliva was collected for 3 min each at different time intervals of 0 (baseline), 5, 10, 15, 30, 60, 120, and 180 min after the rinsing. Fluoride concentrations were determined using a fluoride electrode, and the area under the salivary clearance - time curve (AUC: ppm‧min) of each toothpaste was calculated as the salivary fluoride retention. The main study was then conducted to evaluate the salivary fluoride concentrations as well as the AUC value using 0.5 g of 5 wt % S-PRG filler toothpaste, followed by NaF, MFP, and AmF toothpastes. RESULTS Since there were no statistical differences between using 1.0 and 0.5 g of 20 wt % S-PRG toothpastes in salivary fluoride concentrations as well as the AUC value throughout the 180 min measurement, the volume was set as 0.5 g for the following studies. Concentrations of 5 and 20 wt % S-PRG toothpastes retained 0.09 ppm F or more in saliva even after 180 min. No statistical differences were seen in the salivary fluoride concentrations at any time intervals as well as the AUC value between 5 and 20 wt % S-PRG toothpastes. Based on these results, the concentration of 5 wt % S-PRG toothpaste was used for the main comparative study. MFP toothpaste resulted in by far the lowest salivary fluoride concentrations (0.06 ppm F at 180 min) and the AUC value (24.6 ppm‧min), whereas 5 wt % S-PRG toothpaste (0.15 ppm F at 180 min, 92.3 ppm‧min) displayed retention on par with AmF toothpaste which appeared to result in higher values (0.17 ppm F at 180 min, 103 ppm‧min), compared to NaF toothpaste (0.12 ppm F at 180 min, 49.3 ppm‧min). CONCLUSIONS The salivary fluoride concentrations following toothbrushing with 0.5 g of 5 wt % S-PRG filler containing toothpaste showed retention similar to the best performing 1400 ppm F AmF toothpaste even 180 min after toothbrushing.
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Affiliation(s)
- Mina Hirose
- Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan.
| | - Yukie Murata
- Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan
| | - Atsushi Fukuda
- Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan
| | - Yusuke Fujita
- Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan
| | - Shoko Yahata
- Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan
| | - Minako Kaji
- Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan
| | - Masato Saitoh
- Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Japan
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ThanNaing S, Hiraishi N, Chen X, Foxton R, Shimada Y. In vitro remineralization assessment of enamel subsurface lesions using different percentages of surface reaction-type pre-reacted glass-ionomer containing gum-based material. J Dent 2023; 135:104602. [PMID: 37391026 DOI: 10.1016/j.jdent.2023.104602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 07/02/2023] Open
Abstract
OBJECTIVE To identify the remineralization activity of enamel subsurface lesions using different percentages of surface pre-reacted glass-ionomer (S-PRG) filler containing gum-base material. METHODS Gum extracts from gum-base materials containing 0wt%, 5wt%, and 10wt% S-PRG filler were prepared as GE0, GE5, and GE10, respectively. A total of 50 bovine enamel specimens were used, and the polished enamel surface of a 3 × 3 mm2 window area was exposed. The specimens were then subjected to a demineralization solution for seven days to create a subsurface enamel lesion. Remineralization was then conducted for seven days using a protocol whereby the specimens were immersed three times a day in prepared gum extracts (0wt%, 5wt%, and 10wt%) and artificial saliva of pH 7 (Control) for 20 min at 37 °C. Thereafter, remineralization assessment was performed by using Swept Source Optical Coherence Tomography (SS-OCT) and micro-computed tomography (μCT). Surface morphology and elemental analysis were conducted by scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDS). RESULTS The depths of the demineralized lesions in the GE5 and GE10 groups were significantly lower than those of the Control and the GE0 groups. SEM observations of the enamel surface morphology of the GE5 and GE10 groups indicated remineralization with S-PRG filler-related elements present. CONCLUSION The GE5 and GE10 S-PRG filler containing gum-base materials showed significantly improved surface remineralization and reduced demineralization of the enamel lesions. EDS analysis suggested that the released ions from the S-PRG filler might be responsible for surface remineralization. CLINICAL SIGNIFICANCE The S-PRG filler containing gum-base material may have a significant remineralization effect and improve the surface morphology of enamel subsurface lesions.
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Affiliation(s)
- SoeKayThwe ThanNaing
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-Ku, Tokyo 113-8549, Japan; Department of Conservative Dentistry, University of Dental Medicine Mandalay, Chanmyathazi, Mandalay 05041, Myanmar
| | - Noriko Hiraishi
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-Ku, Tokyo 113-8549, Japan.
| | - Xuefei Chen
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-Ku, Tokyo 113-8549, Japan
| | - Richard Foxton
- Kings College London, Dental Institute, Guys Hospital, London, UK
| | - Yasushi Shimada
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-Ku, Tokyo 113-8549, Japan
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Vertuan M, França da Silva J, Ferreira AM, Braga AS, Magalhães AC. Effect of a Toothpaste Containing Surface Pre-Reacted Glass-Ionomer Filler on the Remineralization of Artificial Carious Enamel Lesions in situ. Caries Res 2023; 56:447-454. [PMID: 36215950 DOI: 10.1159/000527388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 10/03/2022] [Indexed: 11/19/2022] Open
Abstract
This study evaluated the remineralizing effect of a toothpaste containing surface pre-reacted glass-ionomer (S-PRG) filler on demineralized enamel in situ. For this, 180 bovine enamel samples were demineralized by using a microcosm biofilm model for 3 days. Thereafter, the samples were randomly signed to 15 healthy volunteers and to 3 cross-over in situ phases corresponding to the following treatments: (1) toothpaste containing 1,500 ppm F as NaMFP (positive control, Colgate®Cavity Protection), (2) toothpaste containing 5% S-PRG filler (Shofu®), and (3) placebo toothpaste (negative control prepared by Shofu®). Four demineralized enamel blocks were fixed into each palatal appliance per phase. The volunteers wore the appliances for 5 days and were trained to brush their teeth 2 times for 2 min a day, while one drop of the toothpaste's slurry (1:3) was dripped on each sample for the same period. The surface hardness and TMR analyses were done and analyzed by ANOVA/Tukey and t test (p < 0.05). S-PRG filler and Colgate® toothpastes were equally able to improve 2-2.5× enamel remineralization by the analysis of % surface hardness recovery. However, S-PRG toothpaste was the only one able to significantly improve ΔΔZ (the integrated mineral loss recovery: 1,489 ± 503 %vol.μm) compared to placebo (1,050 ± 467 %vol.μm), while Colgate® did not differ from placebo. No differences were seen between the groups with respect to ΔLD. S-PRG filler and Colgate® toothpastes show similar potential to remineralize the lesion surface. However, S-PRG toothpaste is better to recover mineral loss at the subsurface area.
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Affiliation(s)
- Mariele Vertuan
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Júlia França da Silva
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Amanda Moura Ferreira
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Aline Silva Braga
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Ana Carolina Magalhães
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
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Fluoride-Releasing Self-Etch Adhesives Create Thick ABRZ at the Interface. BIOMED RESEARCH INTERNATIONAL 2021; 2021:9731280. [PMID: 34368356 PMCID: PMC8346310 DOI: 10.1155/2021/9731280] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 07/16/2021] [Indexed: 11/17/2022]
Abstract
A fluoride-releasing adhesive system is expected to promote mineralization of demineralized dentin/enamel around a composite restoration, thereby contributing to the longevity of the restoration. Scanning electron microscopic (SEM) and transmission electron microscopic (TEM) observations revealed the formation of an “acid–base resistant zone” (ABRZ) beneath the hybrid layer when dentin was treated with a self-etch adhesive system. A thicker ABRZ was formed from the upper slope to the end of the outer lesion, indicating greater resistance against an acid-base challenge, when a fluoride-releasing self-etch adhesive system was used. The slope formation of a fluoride-releasing adhesive is believed to be due to fluoride-release from the adhesive. Quantitative assessment of the acid resistance was performed at the interface using the region of interest (ROI) mode of a digital image analysis software package. The area of the ABRZ is influenced by the concentration of fluoride release from the adhesive resin. The threshold of fluoride concentration in the adhesive may exist to influence the morphology of the ABRZ. X-ray absorption fine structure (XAFS) analysis of the dentin treated with different concentrations of NaF-mouth rinses suggested that different fluoride concentrations result in the formation of different chemical compounds, such as fluorapatite and CaF2-like structures, on the dentin surface. This may explain the differences in μTBS values and morphological appearance of the ABRZ. NaF is effective in enhancing the enamel/dentin bond durability and also helps create a high quality of ARBZ to improve the clinical success of restorations.
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Ishigure H, Kawaki H, Shintani K, Ueno K, Mizuno-Kamiya M, Takayama E, Hotta M, Kondoh N, Nikaido T. Effects of multi-components released from S-PRG filler on the activities of human dental pulp-derived stem cells. Dent Mater J 2021; 40:1329-1337. [PMID: 34234045 DOI: 10.4012/dmj.2020-390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Numerous studies have shown that the sustained release of ions from dental restorative materials have acid buffering capacity, prevents tooth enamel demineralization, and inhibits bacterial adhesion. Herein, the release behavior and bioresponsiveness of ions released from surface pre-reacted glass-ionomer (S-PRG) fillers were investigated in different types of media based on human dental pulp-derived stem cell (hDPSC) responses. The hDPSCs were cultured for 1-7 days in S-PRG eluates diluted with varying amounts of cell culture media. S-PRG released several types of ions, such as F-, Sr2+, Na+, Al3+, BO33-, and SiO32-. The balance of eluted ions differed depending on the dilution and solvent, which in turn affected the cytotoxicity, cell morphology, cell proliferation, and alkane phosphatase activity of hDPSCs, among other properties. The results suggest that tailored S-PRG filler eluates could be designed and prepared for application in dental practice.
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Affiliation(s)
- Hiroshi Ishigure
- Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, Asahi University School of Dentistry
| | - Harumi Kawaki
- Department of Oral Biochemistry, Division of Oral Structure, Function, and Development, Asahi University School of Dentistry
| | - Kohei Shintani
- Department of Dental Materials Science, Division of Oral Functional Science and Rehabilitation, Asahi University School of Dentistry
| | - Kyohei Ueno
- Department of Oral Biochemistry, Division of Oral Structure, Function, and Development, Asahi University School of Dentistry
| | - Masako Mizuno-Kamiya
- Chemistry Laboratory, Department of Management and Information studies, Asahi University School of Business Administration
| | - Eiji Takayama
- Department of Oral Biochemistry, Division of Oral Structure, Function, and Development, Asahi University School of Dentistry
| | | | - Nobuo Kondoh
- Department of Oral Biochemistry, Division of Oral Structure, Function, and Development, Asahi University School of Dentistry
| | - Toru Nikaido
- Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, Asahi University School of Dentistry
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Shinkai K, Yoshii D. Effect of the S-PRG filler content in the multi-ion releasing paste on the acid resistance of the enamel surface after polishing with the paste. Dent Mater J 2021; 40:1136-1141. [PMID: 34024883 DOI: 10.4012/dmj.2020-303] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study aimed to investigate the effect of the multi-ion releasing paste (MP) on the acid resistance of the enamel surface of an extracted human tooth. Five kinds of MP were prepared according to the content (wt%) of S-PRG fillers: 0 wt% (MP0, control), 1 wt% (MP1), 5 wt% (MP5), 20 wt% (MP20), and 30 wt% (MP30). The buccal coronal surfaces of the extracted anterior teeth were polished with each kind of MP for 1 min. After removing radicular parts, the coronal parts underwent a pH cycling, and then sliced to make thin sections. The lesion depth of each section was measured using a polarization microscope. Each lesion's depth of enamel polished with MP5, MP20, and MP30 was significantly shallower than that polished with MP0.
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Affiliation(s)
- Koichi Shinkai
- Department of Operative Dentistry, The Nippon Dental University School of Life Dentistry at Niigata
| | - Daiki Yoshii
- Department of Operative Dentistry, The Nippon Dental University School of Life Dentistry at Niigata
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da Silva Meirelles Dória Maia JN, Portela MB, Sanchez Candela DR, Neves ADA, Noronha-Filho JD, Mendes ADO, Barros MA, Moreira da Silva E. Fabrication and characterization of remineralizing dental composites containing calcium type pre-reacted glass-ionomer (PRG-Ca) fillers. Dent Mater 2021; 37:1325-1336. [PMID: 33962791 DOI: 10.1016/j.dental.2021.04.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 04/09/2021] [Accepted: 04/24/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To fabricate and characterize dental composites with calcium type pre-reacted glass-ionomer (PRG-Ca) fillers. METHODS PRG-Ca fillers were prepared by the reaction of calcium fluoroaluminosilicate glass with polyacrylic acid. Seven dental composites were produced from the same organic matrix (70/30wt% Bis-GMA/TEGDMA), with partial replacement of barium borosilicate (BaBSi) fillers (60wt%) by PRG-Ca fillers (wt%): E0 (0) - control, E1 (10), E2 (20), E3 (30), E4 (40), E5 (50) and E6 (60). Enamel remineralization was evaluated in caries-like enamel lesions induced by S. mutans biofilm using micro-CT. The following properties were characterized: degree of conversion (DC%), roughness (Ra), Knoop hardness (KHN), flexural strength (FS), flexural modulus (FM), water sorption (Wsp), water solubility (Wsl), and translucency (TP). Data were analyzed to one-way ANOVA and Tukey's HSD test (α=0.05). RESULTS All composites with PRG-Ca induced enamel remineralization. E0 and E1 presented similar and highest DC% than E2=E3=E4=E5=E6. Ra and KHN were not influenced by PRG-Ca fillers (p<0.05). The higher the content of PRG-Ca, the lower FS, FM and TP (p<0.05). Wsp increased linearly with the content of PRG-Ca fillers (p<0.05). E6 presented the highest Wsl (p<0.05), while the Wsl of the other composites were not different from each other (p>0.05). SIGNIFICANCE Incorporation of 10-40wt.% of PRG-Ca fillers endowed remineralizing potential to dental composites without jeopardizing the overall behavior of their physicochemical properties. Dental composites with PRG-Ca fillers seems to be a good alternative for reinforcing the enamel against caries development.
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Affiliation(s)
| | - Maristela Barbosa Portela
- Odontopediatric Division, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | | | - Aline de Almeida Neves
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Brazil; Department of Paediatric Dentistry, King's College London, London, UK
| | - Jaime Dutra Noronha-Filho
- Analitical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Amanda de Oliveira Mendes
- Analitical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Mariana Araújo Barros
- Analitical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Eduardo Moreira da Silva
- Analitical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
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12
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Zhou Y, Hiraishi N, Shimada Y, Wang G, Tagami J, Feng X. Evaluation of tooth demineralization and interfacial bacterial penetration around resin composites containing surface pre-reacted glass-ionomer (S-PRG) filler. Dent Mater 2021; 37:849-862. [DOI: 10.1016/j.dental.2021.02.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 01/30/2021] [Accepted: 02/12/2021] [Indexed: 10/22/2022]
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13
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Shimizu M, Matsui N, Sayed M, Hamba H, Obayashi S, Takahashi M, Tsuda Y, Takagaki T, Nikaido T, Tagami J. Micro-CT assessment of the effect of silver diammine fluoride on inhibition of root dentin demineralization. Dent Mater J 2021; 40:1041-1048. [PMID: 33775984 DOI: 10.4012/dmj.2020-290] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated the ability of different types of silver diammine fluoride (SDF) to inhibit dentin demineralization using micro-focused X-ray computed-tomography (µCT). Dentin specimens were divided into five groups (n=10); no-treatment (control), 3.8% SDF (RC), 38% SDF, 38% SDF with potassium iodide (SDF/KI), and potassium fluoride (KF). The treated-dentin surfaces were subjected to demineralization for 7-days and assessed using µCT to determine mineral loss (ML) values. Specimens were also analyzed with scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The ML values of the SDF and KF groups were significantly lower than those of the RC and SDF/KI groups. EDS detected fluoride ions in the SDF and KF groups but not in the RC and SDF/KI groups. It was concluded that 38% SDF demonstrated a high ability to inhibit dentin demineralization while additional application of KI may diminish the inhibitory effect of SDF. The amount of dentin demineralization with SDF treatments was material dependent.
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Affiliation(s)
- Miyuki Shimizu
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University
| | - Naoko Matsui
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University
| | - Mahmoud Sayed
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University
| | - Hidenori Hamba
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University.,Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College
| | - Sho Obayashi
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University
| | - Motoi Takahashi
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University
| | - Yuka Tsuda
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University
| | - Tomohiro Takagaki
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University.,Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University
| | - Toru Nikaido
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University.,Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University
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14
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Nishimaki M, Nassar M, Tamura Y, Hiraishi N, Dargham A, Nikaido T, Tagami J. The effect of surface pre-reacted glass-ionomer filler eluate on dental pulp cells and mineral deposition on dentin: In vitro study. Eur J Oral Sci 2021; 129:e12777. [PMID: 33724553 DOI: 10.1111/eos.12777] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 12/13/2020] [Accepted: 01/25/2021] [Indexed: 11/28/2022]
Abstract
The effects of surface pre-reacted glass-ionomer (S-PRG) filler on pulpal cells and on the composition of dentinal deposits were investigated. Proliferation (CCK-8), cytotoxicity (LDH), and differentiation activity (ALP) tests, along with cell morphology observations, were conducted at 6 and 24 h after treatment of pulpal cells with different S-PRG filler eluate concentrations. Dentinal surfaces were immersed in deionized water or S-PRG filler eluate followed by immersion in deionized water or simulated body fluid and observed under scanning electron microscope and elemental analysis using energy dispersive x-ray spectrometer. At 24 h, there were significant differences in CCK-8 and ALP activity values between the groups in a concentration-dependent manner. LDH test data were not significantly different among the groups. Cell morphology was not altered at either exposure time. However, decreased cellular density was observed with the highest eluate concentration. Crystalline deposits and occluded dentinal tubules were observed in samples immersed in S-PRG filler with a later immersion in simulated body fluid, which also showed higher concentrations of certain ions compared to surfaces that were not initially treated with S-PRG filler. The lowest two eluate concentrations did not show significant toxicity. S-PRG enhanced the effect of simulated body fluid in the formation of mineral deposits.
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Affiliation(s)
- Mayuri Nishimaki
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mohannad Nassar
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Yukihiko Tamura
- Department of Bio-Matrix (Dental Pharmacology), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Noriko Hiraishi
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ahmad Dargham
- Ras Al Khaimah College of Dental Sciences, Ras Al Khaimah Medical and Health Sciences University, Ras Al Khaimah, United Arab Emirates
| | - Toru Nikaido
- Department of Operative Dentistry, Division of Oral Functional Sciences and Rehabilitation, School of Dentistry, Asahi University, Gifu, Japan
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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15
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Obayashi S, Hamba H, Nakamura K, Nikaido T, Tagami J. Preventive effect of experimental polymer-based desensitizers with NaF on demineralization of root dentin -observed using micro-CT. Dent Mater J 2020; 39:1050-1056. [PMID: 32684611 DOI: 10.4012/dmj.2019-331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study compared the effect of experimental polymer-based desensitizers with NaF and oxalic acid (OA) for preventing root demineralization via observation using micro-CT. Bovine root dentin surfaces were treated with coating materials: no treatment; MS0(+) (MS Coat One®); MS3000(+) (MS Coat®); MS0(-); MS3000(-); MS7000(+/-); fluoride gel (NaF9000). MS; MS polymer, 0-7000; NaF concentrations, (+/-); OA. The specimens were scanned using micro-CT before and after demineralization (pH4.5, 10 h). Following this, the mean mineral loss (ML) after demineralization was calculated, and the specimens were observed under a scanning electron microscope (SEM). The ML values of MS3000(+), MS7000(-), MS7000(+) and NaF9000 were significantly lower than the other groups (p<0.05). Under an SEM, a membrane structure was observed to have formed on the dentin surface in the presence of the MS, fluoride, and OA. The experimental polymer-based desensitizer with oxalic acid and a high concentration of fluoride is effective for preventing root demineralization.
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Affiliation(s)
- Sho Obayashi
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Hidenori Hamba
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College
| | - Keiki Nakamura
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College
| | - Toru Nikaido
- Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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16
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Ogawa A, Wada T, Mori Y, Uo M. Time dependence of multi-ion absorption into human enamel from surface prereacted glass-ionomer (S-PRG) filler eluate. Dent Mater J 2019; 38:707-712. [PMID: 31189797 DOI: 10.4012/dmj.2018-314] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Ion incorporation into the tooth is expected to be effective for caries prevention. Time-dependent ion incorporation released from surface pre-reacted glass-ionomer (S-PRG) filler eluate into tooth enamel was estimated by using inductively coupled plasma atomic emission spectroscopy (ICP-AES). Al, B, and Sr contents in enamel were increased in a time-dependent manner with immersion in S-PRG eluate. Clear ion incorporation was observed after 1 h of immersion in S-PRG filler eluate. Sr showed remarkable incorporation in enamel -up to 7,900 ppm- after 28 days of immersion. Sr and B incorporation rapidly occurred in S-PRG filler eluate, compared with their single component solutions. Simultaneous incorporation of cations and anions from S-PRG eluate occurred under balanced charge and may assist in rapid ion incorporation. Thus, various useful ions could be effectively incorporated into tooth enamel by applying S-PRG filler or its eluate; a bioactive effect can be expected.
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Affiliation(s)
- Ayumi Ogawa
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University
| | - Takahiro Wada
- Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Yoshiyuki Mori
- Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University
| | - Motohiro Uo
- Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo
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17
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Zan KW, Nakamura K, Hamba H, Sadr A, Nikaido T, Tagami J. Micro-computed tomography assessment of root dentin around fluoride-releasing restorations after demineralization/remineralization. Eur J Oral Sci 2018; 126:390-399. [DOI: 10.1111/eos.12558] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/06/2018] [Indexed: 11/28/2022]
Affiliation(s)
- Khine W. Zan
- Department of Cariology and Operative Dentistry; Division of Oral Health Sciences; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan
| | - Keiki Nakamura
- Department of Operative Dentistry, Cariology and Pulp Biology; Tokyo Dental College; Tokyo Japan
| | - Hidenori Hamba
- Department of Cariology and Operative Dentistry; Division of Oral Health Sciences; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan
- Department of Operative Dentistry, Cariology and Pulp Biology; Tokyo Dental College; Tokyo Japan
| | - Alireza Sadr
- Department of Restorative Dentistry; University of Washington School of Dentistry; Seattle WA USA
| | - Toru Nikaido
- Department of Cariology and Operative Dentistry; Division of Oral Health Sciences; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan
| | - Junji Tagami
- Department of Cariology and Operative Dentistry; Division of Oral Health Sciences; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan
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