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In vitro surface analysis of the brushing resistance of orthodontic sealants using two different profilometric evaluation methods. Sci Rep 2022; 12:16133. [PMID: 36167702 PMCID: PMC9515092 DOI: 10.1038/s41598-022-19702-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 09/02/2022] [Indexed: 11/08/2022] Open
Abstract
The enamel can be protected by applying orthodontic sealants at the bracket base to avoid the development of white spot lesions caused by inadequate oral hygiene. The aim of this study was to investigate the mechanical resistance of five commonly used orthodontic sealants against brushing in comparison to a positive group. Hydroxyapatite discs were bonded with a metal bracket and a piece of arch-wire was ligated in order to simulate a daily clinical situation (n = 48). Samples were divided into 6 groups of respectively 8 specimens. Sealants were applied around the bracket base according to manufacturer's instructions. Following sealants were used: Group 1: Pro Seal (Reliance Orthodontic Products, Itasca, Illinois, USA); 2: Light Bond (Reliance Orthodontic Products, Itasca, Illinois, USA); 3: ClinproXT Varnish (3M ESPE, Seefeld, Germany); 4: ProtectoCaF2 Nano (BonaDent GmbH, Frankfurt am Main, Germany); 5: Fluor Protector and 6: Tetric EvoFlow (both Ivoclar Vivadent AG, Schaan Liechtenstein). Tooth brushing were simulated for 6 weeks and 6 months with an electric toothbrush. The sealant thickness was measured by mechanical (MP) and optical profilometry (OP) at baseline, after 6 weeks and after 6 months of brushing. Statistical analysis was performed according to two mixed linear models and post hoc Tukey-Kramer comparisons. The significance level was set at 5% (α ≤ 0.05). Pro Seal (MP: 9%; OP: 22%) and Light Bond (MP: 19%; OP: 16%) showed the lowest changes in sealant thickness after 6 months of simulated brushing. ClinproXT Varnish and Tetric EvoFlow recorded no statistically significant results (p > 0.05). The fluoride varnishes ProtectoCaF2 Nano and Fluor Protector could not be conclusively evaluated since the thickness of the sealants could not be determined at baseline. The results of both evaluation methods MP and OP are in good agreement. Pro Seal and Light Bond were resistant against tooth brushing and were able to adequately keep the bracket environment sealed even after 6 months. The two different measuring methods, MP and OP, provide a precise impression of the changes in the surface.
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Manaswini YH, Uloopi KS, Vinay C, Chandrasekhar R, RojaRamya KS. Impact of Calcium Glycerophosphate-supplemented Carbonated Beverages in Reducing Mineral Loss from the Enamel Surface. Int J Clin Pediatr Dent 2020; 13:1-5. [PMID: 32581469 PMCID: PMC7299895 DOI: 10.5005/jp-journals-10005-1705] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Y Hasita Manaswini
- Department of Pedodontics and Preventive Dentistry, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India
| | - KS Uloopi
- Department of Pedodontics and Preventive Dentistry, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India
| | - C Vinay
- Department of Pedodontics and Preventive Dentistry, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India
| | - Rayala Chandrasekhar
- Department of Pedodontics and Preventive Dentistry, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India
| | - Kakarla Sri RojaRamya
- Department of Pedodontics and Preventive Dentistry, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India
- Kakarla Sri RojaRamya, Department of Pedodontics and Preventive Dentistry, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India, Phone: +91 8985774540, e-mail:
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Sleibi A, Tappuni A, Mills D, Davis GR, Baysan A. Comparison of the Efficacy of Different Fluoride Varnishes on Dentin Remineralization During a Critical pH Exposure Using Quantitative X-Ray Microtomography. Oper Dent 2018; 43:E308-E316. [PMID: 30457948 DOI: 10.2341/18-014-l] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVES: The objective of this in vitro study was to quantify the amount of mineral change in demineralized dentin at pH 5.5 after the application of dental varnishes containing fluoride with casein phosphopeptide-amorphous calcium phosphate, fluoride and bioglass, or fluoride alone. METHODS AND MATERIALS: A total of 12 extracted human sound mandibular premolar root samples were coated with an acid-resistant varnish, leaving a 2 × 3 mm window at the outer root surface. These root specimens were then randomly divided into four groups and separately subjected to the demineralizing cycle at a pH of 4.8 for five days to create artificial caries-like lesions in dentin. Subsequently, each sample was imaged using quantitative x-ray microtomography (XMT) at a 15-μm voxel size. Each test group then received one of the following treatments: dental varnish containing casein phosphopeptide-amorphous calcium phosphate and fluoride (CPP-ACP, MI varnish, GC Europe), bioglass and fluoride (BGA, Experimental, Dentsply Sirona), or fluoride alone (NUPRO, Dentsply Sirona), as well as a control group, which received no treatment. These samples were kept in deionized water for 12 hours. The thin layer of varnish was then removed. All samples including the nonvarnish group were subjected to the second demineralizing cycle at pH 5.5 for five days. The final XMT imaging was then carried out following the second demineralizing cycle. XMT scan was also carried out to varnish samples at 25 μm voxel size. The change in mineral concentration in the demineralized teeth was assessed using both qualitative and quantitative image analysis. RESULTS: There was an increase in radiopacity in the subtracted images of all varnish groups; a significant increase in mineral content, 12% for the CPP-ACP and fluoride ( p≤0.05 and p≤0.001), 25% BGA ( p≤0.001), and 104% fluoride alone varnish ( p≤0.001). There was an increase in the size of radiolucency in the lesion area with a significant decrease in mineral content in the nonvarnish group, 10% ( p≤0.05 and p≤0.001). CONCLUSIONS: There was encouraging evidence of a remineralization effect following the application of dental varnish on dentin and also an observed resistance to demineralization during the acidic challenge in all cases. However, a dental varnish containing fluoride alone appeared to have a much greater effect on dentin remineralization when compared with CPP-ACP with fluoride and bioglass with fluoride.
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Soares LES, da Silva Magalhães J, Marciano FR, Lobo AO. Surface characteristics of a modified acidulated phosphate fluoride gel with nano-hydroxyapatite coating applied on bovine enamel subjected to an erosive environment. Microsc Res Tech 2018; 81:1456-1466. [PMID: 30295365 DOI: 10.1002/jemt.23146] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 09/03/2018] [Accepted: 09/05/2018] [Indexed: 12/12/2022]
Abstract
This study evaluated the antierosive effect applying a modified acidulated phosphate fluoride (APF) gel containing nano-hydroxyapatite (nHAp) on the enamel surface before erosion. After polishing, the exposed flat enamel surfaces (n = 7/group) from bovine incisors were treated with artificial saliva (S - negative control), orange juice (ERO), APF gel (positive control) and APF_nHAp gel. All samples were subjected to six cycles of demineralization (orange juice, pH ~ 3.5, 10 min) followed by remineralization (saliva, 37°C, 1 hr). The enamel surface morphology, topography, and inorganic composition were analyzed using scanning electron microscopy, roughness testing, and micro energy-dispersive X-ray fluorescence spectrometry, respectively. The mean (standard deviation) roughness values (Ra, μm) were S, 0.13 (0.05); ERO, 0.25 (0.07); APF, 0.22 (0.08); and APF_nHAp, 0.17 (0.04). Ra values were significantly higher after ERO (p < .01) and APF (p < .05) treatments than after S. The enamel surface morphology was altered by the treatments, except for the S specimens. The mineral content of the enamel showed a clear trend with Ca and P reduction in the order of APF < S < APF_nHAp < ERO and APF < S < ERO < APF_nHAp, respectively. We can conclude that APF gel increased mineral concentration on the enamel. Moreover, the APF_nHAp material modified the composition and morphology of the enamel surface.
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Affiliation(s)
- Luís Eduardo Silva Soares
- Laboratory of Dentistry and Applied Materials (LDAM), Research and Development Institute (IP&D), Universidade do Vale do Paraíba, São José dos Campos, São Paulo, Brazil
| | - Juarez da Silva Magalhães
- Laboratory of Dentistry and Applied Materials (LDAM), Research and Development Institute (IP&D), Universidade do Vale do Paraíba, São José dos Campos, São Paulo, Brazil
| | | | - Anderson Oliveira Lobo
- LIMAV-Interdisciplinary Laboratory of Advanced Materials. PPGCM-Materials Science and Engineering graduate program, Center of Technology, UFPI-Federal University of Piaui, Teresina, Piauí, Brazil
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Multi-walled carbon nanotubes/graphene oxide hybrid and nanohydroxyapatite composite: A novel coating to prevent dentin erosion. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017. [DOI: 10.1016/j.msec.2017.05.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Soares LES, Soares ALS, De Oliveira R, Nahórny S. The effects of acid erosion and remineralization on enamel and three different dental materials: FT-Raman spectroscopy and scanning electron microscopy analysis. Microsc Res Tech 2016; 79:646-56. [DOI: 10.1002/jemt.22679] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 03/23/2016] [Accepted: 04/19/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Luís Eduardo Silva Soares
- Universidade Do Vale Do Paraíba, UNIVAP, Research and Development Institute, IP&D Laboratory of Biomedical Vibrational Spectroscopy; LEVB, São José Dos Campos São Paulo Brazil
- Universidade Do Vale Do Paraíba, UNIVAP, Faculty of Healt & Sciences, FCS, School of Dentistry; São José Dos Campos São Paulo Brazil
| | - Ana Lúcia Silva Soares
- Universidade Do Vale Do Paraíba, UNIVAP, Research and Development Institute, IP&D Laboratory of Biomedical Vibrational Spectroscopy; LEVB, São José Dos Campos São Paulo Brazil
| | - Rodrigo De Oliveira
- Universidade Do Vale Do Paraíba, UNIVAP, Research and Development Institute, IP&D Laboratory of Biomedical Vibrational Spectroscopy; LEVB, São José Dos Campos São Paulo Brazil
| | - Sidnei Nahórny
- Universidade Do Vale Do Paraíba, UNIVAP, Research and Development Institute, IP&D Laboratory of Biomedical Vibrational Spectroscopy; LEVB, São José Dos Campos São Paulo Brazil
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Batista GR, Rocha Gomes Torres C, Sener B, Attin T, Wiegand A. Artificial Saliva Formulations versus Human Saliva Pretreatment in Dental Erosion Experiments. Caries Res 2016; 50:78-86. [PMID: 26870948 DOI: 10.1159/000443188] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 12/04/2015] [Indexed: 11/19/2022] Open
Abstract
The aim of this study was to evaluate the erosion-preventive effect of different artificial saliva formulations and human saliva in vitro compared to human saliva in situ. In the in vitro experiment, bovine enamel and dentin specimens were stored in artificial saliva (4 different formulations, each n = 20), deionized water (n = 20) or human saliva (n = 6 enamel and dentin specimens/volunteer) for 120 min. In the in situ experiment, each of the 6 enamel and dentin specimens was worn intraorally by 10 volunteers for 120 min. The specimens were then eroded (HCl, pH 2.6, 60 s). Half of the specimens were subjected to microhardness analysis (enamel) and the determination of calcium release into the acid (enamel and dentin), while the other half were again placed in the respective medium or worn intraorally, respectively, for 120 min before a second erosion was performed. Knoop microhardness of enamel and the calcium release of enamel and dentin into the acid were again determined. Statistical analysis was conducted by two-way repeated-measures ANOVA or two-way ANOVA (α = 0.05). Enamel microhardness was not significantly different between all test groups after the first and the second erosive challenge, respectively. Enamel calcium loss was significantly lower in situ compared to the in vitro experiment, where there was no significant difference between all test groups. Dentin calcium loss was significantly lower than deionized water only after the first and than all except one artificial saliva after the second erosion. Under the conditions of this experiment, the use of artificial saliva formulations and human saliva in vitro does not reflect the intraoral situation in dental erosion experiments adequately.
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Affiliation(s)
- Graziela Ribeiro Batista
- Department of Preventive Dentistry, Periodontology and Cariology, University of Zurich, Zurich, Switzerland
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Sar Sancakli H, Austin RS, Al-Saqabi F, Moazzez R, Bartlett D. The influence of varnish and high fluoride on erosion and abrasion in a laboratory investigation. Aust Dent J 2015; 60:38-42. [PMID: 25721276 DOI: 10.1111/adj.12271] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/30/2014] [Indexed: 11/26/2022]
Abstract
BACKGROUND The aim of this study was to investigate the potential of concentrated fluoride varnishes to reduce enamel loss from repeated cycles of citric acid erosion and toothbrush abrasion in vitro. METHODS Polished human enamel samples were exposed to fluoride varnishes: Bifluorid10® (NaF&CaF2- 45,200 ppmF), Duraphat® (NaF 22,600 ppmF), Fluor-Protector® (difluorsilane 1000 ppmF) and a control coating of copal ether varnish (0 ppmF) group and a deionized water group. For each group of 16 samples, nine cycles of erosion and nine cycles of erosion-abrasion [1 cycle=erosion (0.3% citric acid, pH 3.2, 5 min)+artificial saliva (1 h, pH 7.0)+abrasion (120 linear strokes in artificial saliva from Oral B medium soft brushes 300 g loading]. The change in the enamel surface was evaluated using optical profilometry. RESULTS Duraphat® and Bifluorid10® applications had a median (IQR) step height of 4.21 um (1.59) and 5.01 um (1.02). This was statistically significantly less than Fluor-Protector® 6.83 um (1.25), copal ether 7.22 um (1.97) and water 7.39 um (1.96) (p<0.001). For erosion-abrasion, both Duraphat® and Bifluorid® had statistically lower step heights than the other products (p<0.01). CONCLUSIONS The action of fluoride in a range of single-application topical varnishes was effective in reducing enamel wear from erosion and erosion-abrasion in this laboratory study.
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Affiliation(s)
- H Sar Sancakli
- Department of Restorative Dentistry, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
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Soares LES, De Carvalho Filho ACB. Protective effect of fluoride varnish and fluoride gel on enamel erosion: roughness, SEM-EDS, and µ-EDXRF studies. Microsc Res Tech 2015; 78:240-8. [DOI: 10.1002/jemt.22467] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 08/08/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Luís Eduardo Silva Soares
- Dental Materials and Operative Dentistry Department; School of Dentistry; Research and Development Institute; IP&D, Laboratory of Biomedical Vibrational Spectroscopy, Universidade do Vale do Paraíba; UNIVAP, LEVB, São José dos Campos São Paulo Brazil
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Agrawal N, Shashikiran ND, Singla S, Ravi KS, Kulkarni VK. Atomic force microscopic comparison of remineralization with casein-phosphopeptide amorphous calcium phosphate paste, acidulated phosphate fluoride gel and iron supplement in primary and permanent teeth: An in-vitro study. Contemp Clin Dent 2014; 5:75-80. [PMID: 24808700 PMCID: PMC4012123 DOI: 10.4103/0976-237x.128672] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Context: Demineralization of tooth by erosion is caused by frequent contact between the tooth surface and acids present in soft drinks. Aim: The present study objective was to evaluate the remineralization potential of casein-phosphopeptide-amorphous calcium phosphate (CPP-ACP) paste, 1.23% acidulated phosphate fluoride (APF) gel and iron supplement on dental erosion by soft drinks in human primary and permanent enamel using atomic force microscopy (AFM). Materials and Methods: Specimens were made from extracted 15 primary and 15 permanent teeth which were randomly divided into three treatment groups: CPP-ACP paste, APF gel and iron supplement. AFM was used for baseline readings followed by demineralization and remineralization cycle. Results and Statistics: Almost all group of samples showed remineralization that is a reduction in surface roughness which was higher with CPP-ACP paste. Statistical analysis was performed using by one-way ANOVA and Mann-Whitney U-test with P < 0.05. Conclusions: It can be concluded that the application of CPP-ACP paste is effective on preventing dental erosion from soft drinks.
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Affiliation(s)
- Nikita Agrawal
- Department of Pedodontics and Preventive Dentistry, People's College of Dental Science and Research Center, Bhanpur, Bhopal, Madhya Pradesh, India
| | - N D Shashikiran
- Department of Pedodontics and Preventive Dentistry, People's College of Dental Science and Research Center, Bhanpur, Bhopal, Madhya Pradesh, India
| | - Shilpy Singla
- Department of Pedodontics and Preventive Dentistry, People's College of Dental Science and Research Center, Bhanpur, Bhopal, Madhya Pradesh, India
| | - K S Ravi
- Department of Preventive Dental Sciences, Division of Pedodontics, College of Dentistry, King Khalid University, Abha 61471, Assir, Kingdom of Saudi Arabia
| | - Vinaya Kumar Kulkarni
- Department of Pedodontics and Preventive Dentistry, Modern Dental College, Indore, Madhya Pradesh, India
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Barbosa CS, Montagnolli LG, Kato MT, Sampaio FC, Buzalaf MAR. Calcium glycerophosphate supplemented to soft drinks reduces bovine enamel erosion. J Appl Oral Sci 2012; 20:410-3. [PMID: 23032201 PMCID: PMC3881819 DOI: 10.1590/s1678-77572012000400004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Accepted: 08/25/2011] [Indexed: 05/26/2023] Open
Abstract
Objective This in vitro study evaluated the effect of calcium
glycerophosphate (CaGP) supplemented to soft drinks on bovine enamel erosion. Material and methods Four pH-cycles were performed, alternating demineralization by the beverage and
remineralization in artificial saliva. Results Mean wear (±SD, µm) was 7.91±1.13, 7.39±1.01, 7.50±0.91 and 5.21±1.08 for
Coca-ColaTM without CaGP or containing CaGP at 0.1, 1.0 or 2.0 mM,
respectively, while no wear was detected for CaGP at 5.0 and 10.0 mM.
Corresponding figures for Sprite ZeroTM without CaGP or containing CaGP
at 0.1, 1.0, 2.0, 5.0 or 10.0 mM were 8.04±1.30, 7.84±0.71, 7.47±0.80, 4.96±0.81,
3.99±0.10 and 1.87±0.12, respectively. Conclusion Supplementation of both beverages with CaGP seems to be an alternative to reduce
their erosive potential.
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Pereira ADFF, Silva TCD, Silva TLD, Caldana MDL, Bastos JRM, Buzalaf MAR. Xylitol concentrations in artificial saliva after application of different xylitol dental varnishes. J Appl Oral Sci 2012; 20:146-50. [PMID: 22666828 PMCID: PMC3894754 DOI: 10.1590/s1678-77572012000200004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Accepted: 03/17/2010] [Indexed: 12/02/2022] Open
Abstract
Objective The present study analyzed xylitol concentrations in artificial saliva over time
after application of varnishes containing 10% and 20% xylitol. Material and Methods Fifteen bovine enamel specimens (8x4 mm) were randomly allocated to 3 groups
(n=5/group), according to the type of varnish used: 10% xylitol, 20% xylitol and
no xylitol (control). After varnish application (4 mg), specimens were immersed in
vials containing 500 µL of artificial saliva. Saliva samples were collected in
different times (1, 8, 12, 16, 24, 48 and 72 h) and xylitol concentrations were
analyzed. Data were assessed by two-way repeated-measures ANOVA (p<0.05). Results Colorimetric analysis was not able to detect xylitol in saliva samples of the
control group. Salivary xylitol concentrations were significantly higher up to 8 h
after application of the 20% xylitol varnish. Thereafter, the 10% xylitol varnish
released larger amounts of that polyol in artificial saliva. Conclusions Despite the results in short-term, sustained xylitol releases could be obtained
when the 10% xylitol varnish was used. These varnishes seem to be viable
alternatives to increase salivary xylitol levels, and therefore, should be
clinically tested to confirm their effectiveness.
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Delbem A, Alves K, Sassaki K, Moraes J. Effect of Iron II on Hydroxyapatite Dissolution and Precipitation in vitro. Caries Res 2012; 46:481-7. [DOI: 10.1159/000339484] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Accepted: 04/26/2012] [Indexed: 11/19/2022] Open
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Soares LES, Lima LR, Vieira LDS, Santo AMDE, Martin AA. Erosion effects on chemical composition and morphology of dental materials and root dentin. Microsc Res Tech 2011; 75:703-10. [DOI: 10.1002/jemt.21115] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 09/12/2011] [Indexed: 11/06/2022]
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Barbosa CS, Kato MT, Buzalaf MAR. Effect of supplementation of soft drinks with green tea extract on their erosive potential against dentine. Aust Dent J 2011; 56:317-21. [DOI: 10.1111/j.1834-7819.2011.01338.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Sales-Peres SHDC, Reinato JVD, Sales-Peres ADC, Marsicano JA. Effect of iron gel on dentin permeability. Braz Dent J 2011; 22:198-202. [DOI: 10.1590/s0103-64402011000300004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study evaluated in vitro the effect of an experimental gel containing iron on the reduction of hydraulic conductance of dentin. Thirty-six 1-mm-thick dentin discs obtained from extracted human third molars were divided into 3 groups of 10 specimens each. The groups corresponded to the following experimental materials: 1.23% acidulated phosphate fluoride gel, pH 4.1; 3% potassium oxalate gel, pH 4.1 (Oxa-Gel®); and iron sulfate gel (10 mmol/L FeSO4), pH 4.1. The gels were applied to dentin under the following conditions: after 37% phosphoric acid and before 6% citric acid. Data were analyzed statistically by ANOVA and Tukey's test at 5% significance level. There was no significant differences (p<0.05) among the groups in any of the conditions for hydraulic conductance reduction, except for smear layer presence. The active agents reduced dentin permeability, but they produced significantly lower (p<0.05) reduction in hydraulic conductance when compared to presence of smear layer. The effectiveness in reducing dentin permeability was not significantly different (p>0.05) among the gels. This study suggests that the iron gel promoted reduction in dentin permeability comparable to that of the other agents and thus may be considered a good clinical alternative for the treatment of dentin hypersensitivity.
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De Carvalho Filho ACB, Sanches RP, Martin AA, Do Espírito Santo AM, Soares LES. Energy dispersive X-ray spectrometry study of the protective effects of fluoride varnish and gel on enamel erosion. Microsc Res Tech 2010; 74:839-44. [DOI: 10.1002/jemt.20966] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2010] [Revised: 09/24/2010] [Accepted: 10/07/2010] [Indexed: 11/05/2022]
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Quantifying and qualifying surface changes on dental hard tissues in vitro. J Dent 2010; 38:182-90. [DOI: 10.1016/j.jdent.2010.01.002] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Revised: 12/11/2009] [Accepted: 01/06/2010] [Indexed: 11/23/2022] Open
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