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de Castro Oliveira L, Marchetti VM, de Souza E Silva Ramos F, Delbem ACB, Souza MT, Ganss B, Theodoro LH, Fagundes TC. In vitro dentin permeability and tubule occlusion of experimental in-office desensitizing materials. Clin Oral Investig 2023; 27:1265-1276. [PMID: 36305964 DOI: 10.1007/s00784-022-04760-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 10/16/2022] [Indexed: 11/26/2022]
Abstract
OBJECTIVES This study investigates the dentin permeability (by hydraulic conductance) and tubule occlusion (by confocal and scanning electron microscopies) of in-office desensitizing materials. MATERIALS AND METHODS Bovine dentin blocks were immersed in EDTA to open dentinal tubules. Placebo varnish (PLA), fluoride varnish (FLU), NaF 5% + 5% nanoparticulate sodium trimetaphosphate varnish (TMP), universal adhesive system (SBU), S-PRG filler varnish (SPRG), Biosilicate (BIOS), and amelotin (AMTN) solution were the materials tested. After application, the specimens underwent an erosive-abrasive challenge. Dentin permeability was evaluated at T0 (initial), T1 (after treatment), and T2 (after challenge). Confocal and scanning electron microscopy (SEM) were used to evaluate, respectively, length and number of dentinal tubule occlusions and opened dentinal tubules, after challenge. Permeability and SEM data were analyzed by two-way repeated measures ANOVA and Tukey's tests. Confocal data were analyzed by one-way ANOVA, Tukey's test, and Kruskal-Wallis and Dunn's tests. Spearman and Pearson's correlation tests were also used. Significance level was set at 5%. RESULTS At T1, the AMTN group showed the lowest permeability value, following the increasing order at T2: AMTN = SBU < BIOS = SPRG < TMP < FLU < PLA. The SBU group had the highest value of occluded dentinal tubule length. The AMTN group presented more occluded dentinal tubules compared to PLA and FLU. AMTN and SBU had the lowest values of opened dentin tubules. Results showed a negative correlation between the analyses. CONCLUSION The SBU and AMTN solution were more effective in reducing dentin permeability by occluding dentin tubules. CLINICAL RELEVANCE All materials reduced permeability after challenge, except fluoride varnish.
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Affiliation(s)
- Laryssa de Castro Oliveira
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, CEP, 16015-050, Brazil
| | - Vitória Marega Marchetti
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, CEP, 16015-050, Brazil
| | - Fernanda de Souza E Silva Ramos
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, CEP, 16015-050, Brazil
| | - Alberto Carlos Botazzo Delbem
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, CEP, 16015-050, Brazil
| | - Marina Trevelin Souza
- Vitreous Materials Laboratory, Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - Bernhard Ganss
- Faculty of Dentistry and Institute of Biomedical Engineering, University of Toronto, Toronto, Ontário, Canada
| | - Leticia Helena Theodoro
- Department of Diagnosis and Surgery, Division of Periodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Ticiane Cestari Fagundes
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, CEP, 16015-050, Brazil.
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Impacts of orthophosphate-polyphosphate blends on the dissolution and transformation of lead (II) carbonate. Sci Rep 2022; 12:17885. [PMID: 36284172 PMCID: PMC9596708 DOI: 10.1038/s41598-022-22683-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 10/18/2022] [Indexed: 01/20/2023] Open
Abstract
Orthophosphate-polyphosphate blends are commonly used to control lead release into drinking water, but little is known about how they interact with lead corrosion scale. Conventional corrosion control practice assumes that orthophosphate controls lead release by forming insoluble Pb-phosphate minerals, but this does not always occur, and under certain conditions, phosphate blends may increase lead release. Here, we used continuously-stirred tank reactors to compare orthophosphate-polyphosphate blends with orthophosphate on the basis of lead (II) carbonate dissolution and transformation at environmentally relevant phosphate concentrations. Three model polyphosphates-tripoly-, trimeta- and hexametaphosphate-were used. Hexametaphosphate was the strongest complexing agent (1.60-2.10 molPb/molPolyphosphate), followed by tripolyphosphate and trimetaphosphate (1.00 and 0.07 molPb/molPolyphosphate, respectively. At equivalent orthophosphate and polyphosphate concentrations (as P), orthophosphate-trimetaphosphate had minimal impact on lead release, while orthophosphate-tripolyphosphate increased dissolved lead. Orthophosphate-hexametaphosphate also increased dissolved lead, but only over a 24-h stagnation. Both orthophosphate-tripolyphosphate and orthophosphate-hexametaphosphate increased colloidal lead after 24-h. Increasing the concentrations of hexameta- and tripoly-phosphate increased dissolved lead release, while all three polyphosphates inhibited the formation of hydroxypyromorphite and reduced the phosphorus content of the resulting lead solids. We attributed the impacts of orthophosphate-polyphosphates to a combination of complexation, adsorption, colloidal dispersion, polyphosphate hydrolysis, and lead mineral precipitation.
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Oliveira LQC, Delbem ACB, Morais LAD, Gonçalves SC, Souza JAS, Pedrini D. In vitro Evaluation of Surface Free Energy of Dentin after Treatment with Sodium Trimetaphosphate Associated or Not with Fluoride, Exposed or Not to Calcium. Caries Res 2021; 56:81-90. [PMID: 34700319 DOI: 10.1159/000520162] [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: 09/18/2020] [Accepted: 10/10/2021] [Indexed: 11/19/2022] Open
Abstract
It has been stated that sodium trimetaphosphate (TMP) promotes a more anionic dentin surface inducing greater calcium (Ca) and phosphate precipitation. The aim of the present study was to evaluate in vitro the surface free energy (γs) of dentin after treatment with TMP associated or not with fluoride (F), exposed or not to Ca, as well as the adsorption of TMP, F, and Ca by dentin. Bovine dentin blocks (n = 12 blocks/group) were treated with solutions containing TMP at 0, 1, 3, or 9 (w/v) followed or not by the application of Ca. These solutions were or were not associated to 1,100 ppm F. F, Ca, and TMP were determined in the solutions before and after the treatment to calculate the adsorption by dentin. To analyze the γs of dentin, the apolar (γsLW), and polar (γsAB), components were determined by contact angle measurement. Data were submitted to 2-way ANOVA followed by the Student-Newman-Keuls test (p < 0.05). TMP reduces γs of dentin and increases electron donor sites (γs-). Higher values of γs- led to higher adsorption of Ca (p < 0.001). The F/TMP association did not change γs or γsLW and reduced the values of γs-, but the adsorption of Ca was higher. There was correlation between the adsorption of TMP and γs- (Pearson's r = 0.801; p < 0.001) and F (Pearson's r = 0.871, p < 0.001). It is possible to conclude that TMP increased γs- and Ca adsorption, and reduced γs. The association with F increased the adsorption of TMP without rising γs-; however, there was higher adsorption of Ca.
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Affiliation(s)
- Lenara Queiroz Chaves Oliveira
- Department of Preventive and Restorative Dentistry, São Paulo State University (Unesp), School of Dentistry, Araçatuba, Brazil
| | - Alberto Carlos Botazzo Delbem
- Department of Preventive and Restorative Dentistry, São Paulo State University (Unesp), School of Dentistry, Araçatuba, Brazil
| | - Leonardo Antônio de Morais
- Department of Preventive and Restorative Dentistry, São Paulo State University (Unesp), School of Dentistry, Araçatuba, Brazil
| | - Silvio César Gonçalves
- Department of Preventive and Restorative Dentistry, São Paulo State University (Unesp), School of Dentistry, Araçatuba, Brazil
| | | | - Denise Pedrini
- Department of Surgery and Integrated Clinic, São Paulo State University (Unesp), School of Dentistry, Araçatuba, Brazil
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Nalin EKP, Danelon M, da Silva ES, Hosida TY, Pessan JP, Delbem ACB. Surface Free Energy, Interaction, and Adsorption of Calcium and Phosphate to Enamel Treated with Trimetaphosphate and Glycerophosphate. Caries Res 2021; 55:496-504. [PMID: 34517365 DOI: 10.1159/000518943] [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] [Received: 08/02/2020] [Accepted: 08/02/2021] [Indexed: 11/19/2022] Open
Abstract
This study aimed to evaluate the surface (γs) and interaction (ΔGiwi) free energy and calcium (Ca2+) and phosphate (PO43-) adsorption to dental enamel treated with sodium trimetaphosphate (TMP) or calcium glycerophosphate (CaGP) that had or had not been exposed to CaPO4-containing solutions. Bovine enamel blocks (n = 192; 24 blocks/group) were treated (2 mL/block; 2 min) with TMP (0%, 1%, 3%, and 9%) and CaGP (0, 0.25, 0.5, and 1%) or exposed to a CaPO4-containing solution. The adsorption of these compounds by enamel was assessed before and after treatment. γs and ΔGiwi and their apolar (γsLW and ΔGiwiLW) and polar (γsAB and ΔGiwiAB) components and acid-base interactions (γs+/γs-) were determined by the contact angles. The data were subjected to ANOVA, followed by the Student-Newman-Keuls test (p < 0.05). The adsorption of TMP was dose dependent (p < 0.001), and it reduced γs and γsAB and increased ΔGiwiAB (ΔGiwi > 0) and γs- when compared with the group without TMP (p < 0.001). The immersion in CaPO4-containing solution increased γs and γsAB and reduced ΔGiwiAB (ΔGiwi > 0) and γs- (p < 0.001). There was a correlation between the adsorption of TMP and Ca2+ (r = 0.916; p < 0.001) and PO43- (r = 0.899; p < 0.001). The adsorption of CaGP on the enamel was dose dependent (p < 0.001), reducing γs, ΔGiwiAB (ΔGiwi < 0), γsLW, and γs- when compared to the group without CaGP (p < 0.001). When exposed to the CaPO4-containing solution, there was an increase in ΔGiwiAB (ΔGiwi > 0), γsLW, and γs- and a decrease in γsAB (p < 0.001) without adsorption of Ca2+ by enamel. It may be concluded that TMP and CaGP were adsorbed onto the enamel, producing hydrophilic and hydrophobic surfaces, respectively. TMP produces electron donor sites that induce Ca2+ adsorption, while CaGP releases Ca2+ into the medium.
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Affiliation(s)
- Emanuelle Karine Prado Nalin
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba, Brazil
| | - Marcelle Danelon
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba, Brazil
| | - Emanuel Soares da Silva
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba, Brazil
| | - Thayse Yumi Hosida
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba, Brazil
| | - Juliano Pelim Pessan
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba, Brazil
| | - Alberto Carlos Botazzo Delbem
- Department of Preventive and Restorative Dentistry, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba, Brazil
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Effect of fluoride, casein phosphopeptide-amorphous calcium phosphate and sodium trimetaphosphate combination treatment on the remineralization of caries lesions: An in vitro study. Arch Oral Biol 2020; 122:105001. [PMID: 33316658 DOI: 10.1016/j.archoralbio.2020.105001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 11/16/2020] [Accepted: 11/22/2020] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the effects of combination of treatments with fluoridated toothpastes supplemented with sodium trimetaphosphate (TMP) and casein phosphopeptide-amorphous calcium phosphate (MI Paste Plus®), on the remineralization of dental enamel. DESIGN Enamel blocks with artificial caries were randomly allocated into six groups (n = 12), according to the toothpastes: 1) without F-TMP-MI Paste Plus® (Placebo); 2) 1100 ppm F (1100 F), 3) MI Paste Plus®, 4) 1100 F + MI Paste Plus® (1100 F-MI Paste Plus®), 5) 1100 F + 3% TMP (1100 F-TMP) and 6) 1100 F-TMP + MI Paste Plus® (1100 F-TMP-MI Paste Plus®). Blocks were treated 2×/day with slurries of toothpastes (1 min). Furthermore, groups 4 and 6 received the application of MI Paste Plus® for 3 min. After pH cycling, the percentage of surface hardness recovery (%SHR); integrated loss of subsurface hardness (ΔKHN); profile analysis and lesion depth subsurface through polarized light microscopy (PLM), confocal laser scanning microscopy (LSCM), scanning electron microscopy (SEM), fluoride (F), calcium (Ca), phosphorus (P) concentrations in the enamel were determined. The data were analyzed by ANOVA (1-criterion) and Student-Newman-Keuls test (p < 0.001). RESULTS 1100 F-TMP-MI Paste Plus® group showed the best results of %SHR, ΔKHN and PLM (p < 0.001). F concentration was similar between the 1100 F, 1100 F-MI Paste Plus®, and 1100 F-TMP-MI Paste Plus® groups (p > 0.001). 1100 F-TMP-MI Paste Plus® group showed the highest concentration of Ca and P in the enamel (p < 0.001). CONCLUSION The association of 1100 F-TMP and MI Paste Plus® led to a significant increase in the remineralization of initial carious lesions.
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Effect of daily use of fluoridated dentifrice and bleaching gels containing calcium, fluoride, or trimetaphosphate on enamel hardness: an in vitro study. Clin Oral Investig 2020; 25:883-889. [PMID: 32488489 DOI: 10.1007/s00784-020-03375-5] [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] [Received: 10/24/2019] [Accepted: 05/25/2020] [Indexed: 10/24/2022]
Abstract
OBJECTIVE This study evaluated the effects of calcium gluconate (CaGlu), sodium fluoride (NaF), sodium trimetaphosphate (TMP), and NaF/TMP added to a 35% hydrogen peroxide (HP) bleaching gel for the reduction in enamel demineralization in vitro, with and without the use of a fluoridated dentifrice. DESIGN Enamel blocks (n = 100) were obtained from bovine incisors (n = 200) after flattening and subjected to initial surface hardness (SH) analysis. The blocks were divided according to the bleaching gel (35% HP; 35% HP + 0.05% NaF; 35% HP + 0.25% TMP; 35% HP + 0.05% NaF + 0.25% TMP; 35% HP + 2% CaGlu) and were treated with ether non-fluoridated or fluoridated (1100 ppm) dentifrice. The bleaching gels were applied thrice (40 min/session) at the intervals of 7 days between each application. After 21 days, the final SH for the calculation of the percentage of SH loss (%SH) and cross-sectional hardness for the evaluation of the integrated hardness area (IH) were determined. RESULTS Bleaching containing HP + NaF + TMP presented lowest %SH (p < 0.001), regardless of the dentifrice used. HP + NaF + TMP bleaching gel led to lower subsurface enamel mineral loss (IH) compared to the other groups (p < 0.001), and these did not differ from each other (p > 0.05). Daily use of fluoride dentifrice led to higher IH values (p < 0.001), regardless of the bleaching gels. CONCLUSION The addition of NaF/TMP to a 35% HP bleaching gel remarkably reduced the mineral loss compared to the cases of the other bleaching gels, regardless of dentifrice. CLINICAL RELEVANCE The association of TMP/NaF can be used as a strategy for reducing mineral loss during the bleaching procedure, even without the daily use of fluoride dentifrice.
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Danelon M, Pessan JP, Prado KM, Ramos JP, Emerenciano NG, Moretto MJ, Martinhon CCR, Delbem ACB. Protective Effect of Fluoride Varnish Containing Trimetaphosphate against Dentin Erosion and Erosion/Abrasion: An in vitro Study. Caries Res 2020; 54:292-296. [PMID: 31968330 DOI: 10.1159/000505179] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 11/29/2019] [Indexed: 11/19/2022] Open
Abstract
This in vitro study evaluated the protective effect of fluoride varnishes containing sodium trimetaphosphate (TMP) against dentin erosion and abrasion. Specimens of coronal dentin were divided into: placebo, 2.5% NaF, 5% NaF, 2.5% NaF + 5% TMP, and 5% NaF + 5% TMP groups (n =24/group). After single application of the varnishes, the samples were immersed in citric acid (0.05 mol/L, pH = 3.2, 5 min) followed or not by brushing, and the dentin wear was assessed after 5 days. Varnishes containing fluoride + TMP led to the lowest wear. TMP varnishes showed a superior effect against dentin erosive wear.
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Affiliation(s)
- Marcelle Danelon
- Department of Pediatric Dentistry and Public Health, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Juliano Pelim Pessan
- Department of Pediatric Dentistry and Public Health, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Kamila Miranda Prado
- Department of Pediatric Dentistry and Public Health, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Jéssica Paula Ramos
- Department of Pediatric Dentistry and Public Health, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Nayara Gonçalves Emerenciano
- Department of Pediatric Dentistry and Public Health, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba, Brazil
| | | | | | - Alberto Carlos Botazzo Delbem
- Department of Pediatric Dentistry and Public Health, School of Dentistry, Araçatuba, São Paulo State University (UNESP), Araçatuba, Brazil,
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da Silva MER, Danelon M, Santos Souza JA, Silva DF, Pereira JA, Pedrini D, de Camargo ER, Botazzo Delbem AC, Duque C. Incorporation of chlorhexidine and nano-sized sodium trimetaphosphate into a glass-ionomer cement: Effect on mechanical and microbiological properties and inhibition of enamel demineralization. J Dent 2019; 84:81-88. [PMID: 30953673 DOI: 10.1016/j.jdent.2019.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 03/26/2019] [Accepted: 04/02/2019] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To evaluate the antimicrobial/antibiofilm and mechanical properties, and the effect on enamel demineralization of a resin-modified GIC (RMGIC) containing CHX and nano-sized sodium trimetaphosphate (TMP). METHODS RMGIC was associated with CHX (1.25 or 2.5%) and/or TMP (7 or 14%). Antimicrobial and antibiofilm activity were assessed using agar diffusion test and evaluation of biofilm metabolism, respectively. In addition, fluoride (F) and TMP releases as well as the diametral tensile (DTS) and compressive (CS) strength were determined. The percentage of mineral loss (%SH), integrated loss of subsurface hardness (ΔKHN) and enamel F concentrations were also evaluated. RESULTS RMGICs containing CHX associated or not with TMP presented higher inhibition zones and effect on S. mutans biofilm. A reduction on CS was observed only for RMGIC + 2.5%CHX and on DTS for RMGIC + 2.5%CHX + 14%TMP. The highest F and TMP releases and lowest %SH and ΔKHN values were detected for RMGIC + 1.25%CHX + 14%TMP and RMGIC + 2.5%CHX + 14%TMP. Higher enamel F concentrations were observed for TMP groups. CONCLUSION 1.25%CHX and 14%TMP increased antimicrobial/antibiofilm action and the ability to prevent enamel demineralization, with minimal effect on the mechanical properties of RMGIC. CLINICAL SIGNIFICANCE RMGIC containing CHX and TMP is an alternative material for patients at high risk for dental caries and can be indicated for low-stress regions or provisional restorations.
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Affiliation(s)
| | - Marcelle Danelon
- Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - José Antonio Santos Souza
- Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Dinah Fressato Silva
- Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Jesse Augusto Pereira
- Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Denise Pedrini
- Department of Surgery and Integrated Clinic, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
| | | | - Alberto Carlos Botazzo Delbem
- Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - Cristiane Duque
- Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil.
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Danelon M, Pessan JP, Santos VRD, Chiba EK, Garcia LSG, de Camargo ER, Delbem ACB. Fluoride toothpastes containing micrometric or nano-sized sodium trimetaphosphate reduce enamel erosion in vitro. Acta Odontol Scand 2018; 76:119-124. [PMID: 29037096 DOI: 10.1080/00016357.2017.1388442] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To evaluate the effect of fluoride toothpastes supplemented with micrometric or nano-sized sodium trimetaphosphate (TMP or TMPnano, respectively) on enamel erosion in vitro, as well as the influence of salivary acquired pellicle and saliva. MATERIAL AND METHODS Bovine enamel blocks (n = 120) were randomly assigned into the following experimental toothpastes: no F/TMP/TMPnano (Placebo); 1100 ppm F (1100 ppm F); 1100 ppm F plus 3% TMP or 3% TMPnano (1100 TMP or 1100 TMPnano, respectively) and 5000 ppm F (5000 ppm F). Erosive challenge was performed by immersion of the blocks in citric acid for 5 min, followed by 2 h immersion in human or artificial saliva, 4×/day, during 5 days. After each erosive challenge, blocks were exposed to slurries of the toothpastes. Enamel erosion (µm), surface hardness (SHf) and cross-sectional hardness (ΔKHN) were analyzed as response variables and the data were submitted to two-way ANOVA, followed by the Student-Newman-Keuls test (p < .05). RESULTS 1100 TMPnano significantly reduced enamel loss when compared to 1100 TMP (p = .002), reaching values similar to those promoted by 5000 ppm F (p = .96). 1100 ppm F presented significantly lower enamel loss than Placebo (p < .001), and higher than 1100 TMP (p < .001). Significantly higher SHf and lower ΔKHN was observed for 1100 TMPnano and 5000 ppm F when compared with the other groups (p < .001). The type of saliva did not influence enamel erosion, SHf and ΔKHN for the groups treated with TMP-containing toothpastes. CONCLUSION The addition of 3% TMPnano to 1100 ppm F toothpastes significantly increases the protective effect against enamel erosion in vitro when compared with its counterparts with micrometric TMP or without TMP. This effect was not influenced by the presence of acquired enamel pellicle and saliva.
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Affiliation(s)
- Marcelle Danelon
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, Araçatuba (SP), Brazil
| | - Juliano Pelim Pessan
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, Araçatuba (SP), Brazil
| | - Vinicius Rodrigues dos Santos
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, Araçatuba (SP), Brazil
| | - Erika Kiyoko Chiba
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, Araçatuba (SP), Brazil
| | - Luhana Santos Gonzales Garcia
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, Araçatuba (SP), Brazil
| | | | - Alberto Carlos Botazzo Delbem
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, Araçatuba (SP), Brazil
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Mendes-Gouvêa CC, do Amaral JG, Fernandes RA, Fernandes GL, Gorup LF, Camargo ER, Delbem ACB, Barbosa DB. Sodium trimetaphosphate and hexametaphosphate impregnated with silver nanoparticles: characteristics and antimicrobial efficacy. BIOFOULING 2018; 34:299-308. [PMID: 29482366 DOI: 10.1080/08927014.2018.1437146] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 01/31/2018] [Indexed: 06/08/2023]
Abstract
This study aimed to synthesize and characterize materials containing silver nanoparticles (AgNP) with polyphosphates (sodium trimetaphosphate (TMP) or sodium hexametaphosphate (HMP), and evaluate their effect against Candida albicans and Streptococcus mutans. The minimum inhibitory concentration (MIC) was determined, which was followed by the quantification of the biofilm by counting colony-forming units (CFUs), the amount of metabolic activity, and the total biomass. The MICs revealed greater effectiveness of composites containing 10% Ag (TMP + Ag10% (T10) and HMP + Ag10% (H10)) against both microorganisms. It was observed that T10 and H10 reduced the formation of biofilms by 56-76% for C. albicans and by 52-94% for S. mutans for total biomass and metabolic activity. These composites promoted significant log reductions in the number of CFUs, between 0.45-1.43 log10 for C. albicans and 2.88-3.71 log10 for S. mutans (p < .001). These composites demonstrated significant antimicrobial activity, especially against S. mutans, and may be considered a potential alternative for new dental materials.
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Affiliation(s)
- Carla Corrêa Mendes-Gouvêa
- a Department of Pediatric Dentistry and Public Health, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Jackeline Gallo do Amaral
- a Department of Pediatric Dentistry and Public Health, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Renan Aparecido Fernandes
- b Department of Dental Materials and Prosthodontics, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Gabriela Lopes Fernandes
- b Department of Dental Materials and Prosthodontics, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Luiz Fernando Gorup
- c Department of Chemistry , Federal University of São Carlos (UFSCar) , São Carlos , Brazil
| | | | - Alberto Carlos Botazzo Delbem
- a Department of Pediatric Dentistry and Public Health, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Debora Barros Barbosa
- b Department of Dental Materials and Prosthodontics, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
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Dentinal tubule obliteration using toothpastes containing sodium trimetaphosphate microparticles or nanoparticles. Clin Oral Investig 2018; 22:3021-3029. [PMID: 29464359 DOI: 10.1007/s00784-018-2384-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 02/07/2018] [Indexed: 10/18/2022]
Abstract
OBJECTIVES This in vitro study evaluated the effect of microparticles (TMPmicro) or nanoparticles (TMPnano) TMP associated with fluoride (F) in toothpaste formulations on the obliteration of dentinal tubules (DT). MATERIALS AND METHODS The dentinal tubules of bovine dentin blocks were unobstructed by immersion in 37% phosphoric acid solution. Blocks (n = 20/group) underwent mechanical brushing (2×/day) during 7 days with toothpastes: placebo, 1100 ppm F, and 1100 with 3% TMPmicro or 3% TMPnano. After that, ten blocks of each group were immersed in citric acid (pH 3.2) for 1 min. The number, diameter and area of unobstructed DT, atomic % of chemical elements from precipitates, and the mineral concentration were quantified. Data were submitted to two-way ANOVA, followed by Student-Newman-Keuls test (P < 0.05). RESULTS Toothpastes containing TMPmicro and TMPnano promoted greater obliteration of DT and greater mineral concentration compared to other groups (P < 0.05). Placebo and 1100 ppm F group presented similar obliteration but 1100 ppm F group promoted higher mineral concentration. Higher Ca/P ratios were observed in groups treated with TMP; the acid challenge reduced Ca/P ratio for all groups. The atomic % of C and N was significantly lower for TMP toothpastes before acid challenge, but increased afterwards. CONCLUSIONS It was concluded that the addition of TMPmicro or TMPnano to F toothpastes produced greater obliteration of dentinal tubules and higher mineral concentration when compared with 1100 ppm F. CLINICAL RELEVANCE By the addition of TMP, fluoride toothpastes may occlude the dentinal tubules, with potential to reduce dentin hypersensitivity.
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Amaral JG, Pessan JP, Souza JAS, Moraes JCS, Delbem ACB. Cyclotriphosphate associated to fluoride increases hydroxyapatite resistance to acid attack. J Biomed Mater Res B Appl Biomater 2018; 106:2553-2564. [DOI: 10.1002/jbm.b.34072] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 10/12/2017] [Accepted: 12/15/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Jackeline G. Amaral
- Department of Pediatric Dentistry and Public Health; Araçatuba Dental School, Universidade Estadual Paulista (UNESP); Araçatuba São Paulo Brazil
| | - Juliano P. Pessan
- Department of Pediatric Dentistry and Public Health; Araçatuba Dental School, Universidade Estadual Paulista (UNESP); Araçatuba São Paulo Brazil
| | - José Antonio S. Souza
- Department of Pediatric Dentistry and Public Health; Araçatuba Dental School, Universidade Estadual Paulista (UNESP); Araçatuba São Paulo Brazil
| | - João Carlos S. Moraes
- Engeneering School, Universidade Estadual Paulista (UNESP); Ilha Solteira São Paulo Brazil
| | - Alberto Carlos B. Delbem
- Department of Pediatric Dentistry and Public Health; Araçatuba Dental School, Universidade Estadual Paulista (UNESP); Araçatuba São Paulo Brazil
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