1
|
Chen JM, Cheng YL, Yang MH, Su C, Yu H. Enhancing the inhibition of dental erosion and abrasion with quercetin-encapsulated hollow mesoporous silica nanocomposites. Front Bioeng Biotechnol 2024; 12:1343329. [PMID: 38405377 PMCID: PMC10885352 DOI: 10.3389/fbioe.2024.1343329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 01/26/2024] [Indexed: 02/27/2024] Open
Abstract
Introduction: Dental erosion and abrasion pose significant clinical challenges, often leading to exposed dentinal tubules and dentine demineralization. The aim of this study was to analyse the efficacy of quercetin-encapsulated hollow mesoporous silica nanocomposites (Q@HMSNs) on the prevention of dentine erosion and abrasion. Method: Q@HMSNs were synthesized, characterized, and evaluated for their biocompatibility. A total of 130 dentine specimens (2 mm × 2 mm × 2 mm) were prepared and randomly distributed into 5 treatment groups (n = 26): DW (deionized water, negative control), NaF (12.3 mg/mL sodium fluoride, positive control), Q (300 μg/mL quercetin), HMSN (5.0 mg/mL HMSNs), and Q@HMSN (5.0 mg/mL Q@HMSNs). All groups were submitted to in vitro erosive (4 cycles/d) and abrasive (2 cycles/d) challenges for 7 days. The specimens in the DW, NaF, and Q groups were immersed in the respective solutions for 2 min, while treatment was performed for 30 s in the HMSN and Q@HMSN groups. Subsequently, the specimens were subjected to additional daily erosion/abrasion cycles for another 7 days. The effects of the materials on dentinal tubule occlusion and demineralized organic matrix (DOM) preservation were examined by scanning electron microscopy (SEM). The penetration depth of rhodamine B fluorescein into the etched dentine was assessed using confocal laser scanning microscopy (CLSM). The erosive dentine loss (EDL) and release of type I collagen telopeptide (ICTP) were measured. The data were analysed by one-way analysis of variance (ANOVA) with post hoc Tukey's test (α = 0.05). Results: Q@HMSNs were successfully synthesized and showed minimal toxicity to human dental pulp stem cells (HDPSCs) and gingival fibroblasts (HGFs). Q@HMSNs effectively occluded the dentinal tubules, resulting in a thicker DOM in the Q@HMSN group. The CLSM images showed more superficial penetration in the HMSN and Q@HMSN groups than in the quercetin, NaF, and DW groups. The Q@HMSN group exhibited a significantly lower EDL and reduced ICTP levels compared to the other groups (p < 0.05). Conclusion: Q@HMSNs hold promise for inhibiting dentine erosion and abrasion by promoting tubule occlusion and DOM preservation.
Collapse
Affiliation(s)
- Jia-Min Chen
- Fujian Key Laboratory of Oral Diseases and Fujian Provincial Engineering Research Center of Oral Biomaterial and Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Yi-Ling Cheng
- Fujian Key Laboratory of Oral Diseases and Fujian Provincial Engineering Research Center of Oral Biomaterial and Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Meng-Hui Yang
- Fujian Key Laboratory of Oral Diseases and Fujian Provincial Engineering Research Center of Oral Biomaterial and Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Chen Su
- Fujian Key Laboratory of Oral Diseases and Fujian Provincial Engineering Research Center of Oral Biomaterial and Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Hao Yu
- Fujian Key Laboratory of Oral Diseases and Fujian Provincial Engineering Research Center of Oral Biomaterial and Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- Department of Prosthodontics, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- Clinic for Conservative and Preventive Dentistry, Center of Dental Medicine, University Zurich, Zurich, Switzerland
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| |
Collapse
|
2
|
Li XY, Lin XJ, Zhong BJ, Yu H. Effects of the application timing of anti-erosive agents on dentin erosion. J Mech Behav Biomed Mater 2022; 136:105512. [PMID: 36274553 DOI: 10.1016/j.jmbbm.2022.105512] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/29/2022] [Accepted: 10/02/2022] [Indexed: 11/06/2022]
Abstract
This in vitro study aimed to evaluate the effects of the application timing of anti-erosive agents on dentin erosion. Eighty dentin specimens with dimensions of 2 × 2 × 2 mm were prepared and randomly divided into 4 groups based on the treatment solutions: 1.23 × 104 μg/ml sodium fluoride (NaF), 120 μg/ml chlorhexidine (CHX), 300 μg/ml quercetin (QUE), and deionized water (DW, negative control). The specimens in each group were further divided into 2 subgroups according to the application timing of the treatment solutions (n = 10): before the erosive challenges (PRE) and after the erosive challenges (POST). All specimens were submitted to 4 daily erosive challenges for 5 d. For each erosive challenge, the specimens in the subgroup PRE were treated with the respective solutions for 2 min and then immersed in cola drinks for 5 min, while the specimens in the subgroup POST were immersed in cola drinks for 5 min followed by treatment with the respective solutions for 2 min. The erosive dentin loss (EDL) was measured using a contact profilometer, and the surface morphology of the dentin specimens was evaluated by scanning electron microscopy at the end of the experiment. The data were statistically analyzed using two-way analysis of variance (ANOVA) and Bonferroni's test (α = 0.05). Significantly less EDL was observed in the groups NaF, CHX, and QUE than in the group DW (all P < 0.001). Significantly lower EDL was observed in the groups CHX and QUE than in the group NaF (P = 0.001 and P < 0.001, respectively). For CHX, subgroup POST exhibited significantly less EDL than subgroup PRE (P < 0.001). Regarding QUE, subgroup PRE showed significantly less EDL than subgroup POST (P < 0.001). Furthermore, a relatively greater number of obliterated dentinal tubules was visible in the subgroup POST rather than in the subgroup PRE of the group CHX, while in the group QUE, narrower dentinal tubules were observed in the subgroup PRE than those in subgroup POST. In conclusion, CHX and QUE showed the best performance in controlling dentin erosion. CHX was more effective in reducing EDL when applied after erosive challenges, whereas QUE worked more effectively when used before erosive attacks. The application timing should be considered when evaluating the effects of anti-erosive agents because it may determine their effectiveness.
Collapse
Affiliation(s)
- Xue-Yu Li
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, China; Department of Prosthodontics & Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, China
| | - Xiu-Jiao Lin
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, China; Department of Prosthodontics & Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, China
| | - Bing-Jie Zhong
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, China; Department of Prosthodontics & Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, China
| | - Hao Yu
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, China; Department of Prosthodontics & Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, China.
| |
Collapse
|
3
|
Chevitarese AB, Leite KLDF, Marañón-Vásquez GA, Masterson D, Vicente-Gomila JM, Gonçalves AF, Pitton M, Maia LC. Research Trends on Preventive and Therapeutic Use of TIF4 for Dental Caries and Erosion. PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLÍNICA INTEGRADA 2022. [DOI: 10.1590/pboci.2022.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
|
4
|
Maselli A, Silva TMD, Gonçalves LL, Braga AS, Bresciani E, Magalhães AC, Gonçalves SEDP. Effect of fluoride, chlorhexidine or Nd:YAG on the progression of root dentin demineralization after removal of the demineralized organic matrix. J Appl Oral Sci 2022; 30:e20210496. [PMID: 35293423 PMCID: PMC8957282 DOI: 10.1590/1678-7757-2021-0496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 12/20/2021] [Indexed: 11/22/2022] Open
|
5
|
LINS RODRIGOBARROSESTEVES, SANTI MARINARODRIGUES, NORONHA MAYARADOSSANTOS, SEBOLD MAICON, CAVALLI VANESSA. DOES TITANIUM TETRAFLUORIDE PROMOTE A PROTECTIVE EFFECT ON ERODED TOOTH? A SYSTEMATIC REVIEW AND META-ANALYSIS. J Evid Based Dent Pract 2021; 22:101682. [DOI: 10.1016/j.jebdp.2021.101682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 11/27/2021] [Accepted: 11/30/2021] [Indexed: 11/28/2022]
|
6
|
Wierichs RJ, Mester J, Wolf TG, Meyer-Lueckel H, Esteves-Oliveira M. Effects of the association of high fluoride- and calcium-containing caries-preventive agents with regular or high fluoride toothpaste on enamel: an in vitro study. Clin Oral Investig 2021; 26:3167-3178. [PMID: 34816310 DOI: 10.1007/s00784-021-04299-4] [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: 09/21/2021] [Accepted: 11/15/2021] [Indexed: 10/19/2022]
Abstract
OBJECTIVES The aim of this in vitro study was to compare the caries-preventive effect of various high fluoride- and calcium-containing caries-preventive agents (> 22.000 ppm F- [ppm]) in adjunct to use of regular (1450 ppm) or high (5000 ppm) fluoride toothpaste on sound as well as demineralized enamel. MATERIALS AND METHODS Bovine enamel specimens (n = 276; 5 mm × 3.5 mm × 3 mm) having one sound surface [ST] and one artificial caries lesion [DT] were randomly allocated to 12 groups. Interventions before pH-cycling were no intervention ([SC1/SC5]), application of varnishes/solutions containing NaF (22,600 ppm; Duraphat [NaF1/NaF5]); NaF + tricalcium phosphate (22,600 ppm; Clinpro White Varnish [TCP1/TCP5]); NaF + CPP-ACP (22,600 ppm; MI Varnish [CPP1/CPP5]); silver diammine fluoride (35,400 ppm; Cariestop 30%[SDF1/SDF5]); and NaF + calcium fluoride (45,200 ppm; Biophat[CaF1/CaF5]). During pH-cycling (28 days, 6 × 120 min demineralization/day) half of the specimens in each group were brushed (10 s; 2 × /day) with either 1,450 (NaF; named, e.g., TCP1) or 5,000 ppm (NaF; e.g., TCP5) dentifrice slurry. Differences in integrated mineral loss (∆∆Z) and lesion depth (∆LD) were calculated between values after initial demineralization and after pH-cycling using transversal microradiography. RESULTS After pH-cycling, SC1/SC5 showed significantly increased ∆ZDT/LDDT values, indicating further demineralization (p < 0.05; paired t-test). Decreased ∆ZDT values, indicating non-significant remineralization, could only be observed in CaF1/CaF5 (p > 0.05; paired t-test). Additional use of all varnishes/solutions significantly decreased ∆∆ZDT/∆∆ZST and ∆LDDT/∆LDST compared to SC1/SC5 (p < 0.05;ANCOVA). Between 1450 and 5000 ppm dentifrices, a significant difference in ∆∆ZDT/∆∆ZST and ∆LDDT/∆LDST could only be observed for SC1/SC5 (p < 0.05; ANCOVA). CONCLUSION Under the conditions chosen, all fluoride varnishes/solutions significantly reduced demineralization. Furthermore, a significant dose-response characteristic for fluoride varnishes could be revealed. However, no additional benefit could be observed, when varnishes were combined with high fluoride instead of regular fluoride dentifrices. CLINICAL RELEVANCE For children and adolescents with high caries risks varnishes containing more than 22,600 ppm should be further investigated, as they offered higher caries-preventive effects in vitro. Furthermore, there seems to be no difference in the demineralization-inhibitory capacity of fluoride varnishes when used in combination with either standard or highly fluoridated dentifrices.
Collapse
Affiliation(s)
- Richard Johannes Wierichs
- Department of Restorative, Preventive and Pediatric Dentistry, zmk bern, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland. .,Department of Biohybrid & Medical Textiles, Institute of Applied Medical Engineering, RWTH Aachen University, 52074, Aachen, Germany.
| | - Judith Mester
- Department of CariologyEndodontology and Periodontology, University of Leipzig, Liebigstraße 12, 04103, Leipzig, Germany
| | - Thomas Gerhard Wolf
- Department of Restorative, Preventive and Pediatric Dentistry, zmk bern, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland.,Department of Periodontology and Operative Dentistry, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Hendrik Meyer-Lueckel
- Department of Restorative, Preventive and Pediatric Dentistry, zmk bern, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland
| | - Marcella Esteves-Oliveira
- Department of Restorative, Preventive and Pediatric Dentistry, zmk bern, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland.,Department of CariologyEndodontology and Periodontology, University of Leipzig, Liebigstraße 12, 04103, Leipzig, Germany
| |
Collapse
|
7
|
Canto FMT, Alexandria AK, Justino IBDS, Rocha GM, Cabral LM, Ferreira RDS, Pithon MM, Maia LC. The use of a new calcium mesoporous silica nanoparticle versus calcium and/or fluoride products in reducing the progression of dental erosion. J Appl Oral Sci 2020; 28:e20200131. [PMID: 32725049 PMCID: PMC7384487 DOI: 10.1590/1678-7757-2020-0131] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 05/19/2020] [Indexed: 01/16/2023] Open
Abstract
Objective There is increasingly common the consumption more times a day of foods and acidic drinks in the diet of the population. The present study aimed to evaluate and compare the effects of a calcium mesoporous silica nanoparticle single application of other calcium and/or fluoride products in reducing the progression of dental erosion. Methodology Half of the eroded area was covered of 60 blocks of enamel, after which the block was submitted to the following treatments: (Ca2+-MSN), casein phosphopeptide–amorphous calcium phosphate (CPP-ACP); CPP-ACP/F-(900 ppm F−); titanium tetrafluoride (TiF4 1%) (positive control); sodium fluoride (NaF 1.36%) (positive control); and Milli-Q® water (negative control) before being submitted to a second erosive challenge. A surface analysis was performed via a three-dimensional (3D) noncontact optical profilometry to assess the volumetric roughness (Sa) and tooth structure loss (TSL) and and through scanning electron microscopy (MEV). An analysis of variance (ANOVA) and Tukey’s test were performed. Results Regarding Sa, all experimental groups exhibited less roughness than the control (p<0.05). The TSL analysis revealed that the Ca2+-MSN and NaF groups were similar (p>0.05) and more effective in minimizing tooth loss compared with the other groups (p<0.05). Conclusions The Ca2+-MSN and NaF treatments were superior compared with the others and the negative control.
Collapse
Affiliation(s)
| | - Adílis Kalina Alexandria
- Departamento de Odontopediatria e Ortodontia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Isabela B Dos Santos Justino
- Departamento de Odontopediatria e Ortodontia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Gustavo Miranda Rocha
- Departamento de Biofísica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Lúcio Mendes Cabral
- Departamento de Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Raphael da Silva Ferreira
- Departamento de Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Matheus Melo Pithon
- Departamento de Odontopediatria e Ortodontia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Lucianne Cople Maia
- Departamento de Odontopediatria e Ortodontia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| |
Collapse
|
8
|
Canto FMT, Alexandria AK, Vieira TI, Justino IBDS, Cabral LM, Silva RFD, Maia LC. Comparative Effect of Calcium Mesoporous Silica Versus Calcium and/or Fluoride Products Against Dental Erosion. Braz Dent J 2020; 31:164-170. [PMID: 32556016 DOI: 10.1590/0103-6440202002557] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 10/14/2019] [Indexed: 01/01/2023] Open
Abstract
The aim of this study was to compare the effects of a single application of a new calcium mesoporous silica nanoparticle (Ca2+-MSN) versus other calcium and/or fluoride products against dental erosion. Enamel blocks were half-covered and assigned to six groups (n = 10): Ca2+-MSNs; casein phosphopeptide-amorphous calcium phosphate mousse (CPP-ACP); CPP-ACP/F- (900 ppm F-); titanium tetrafluoride (TiF4 1%); sodium fluoride (NaF 1.36%); and Milli-Q® water (negative control). A single application for each product was completed on the exposed areas of the blocks and were submitted to an erosive challenge. Differences in volumetric roughness (Sa), and tooth structure loss (TSL) by use of three-dimensional noncontact optical profilometry were evaluate. Scanning electron microscopy (SEM) was performed. Analysis of variance and Tukey's test for Sa and the Kruskal-Wallis and Mann-Whitney U tests (p< 0.05) for TSL, respectively. Results: When evaluating Sa, all products presented differences in roughness when compared with the control group (p< 0.05) but not with each other (p > 0.05). However, when analyzing the TSL, it was observed that Ca2+-MSNs, TiF4, and NaF were more effective in preventing dental erosion versus CPP-ACP, CPP-ACP/F-, and Milli-Q® water (p< 0.05). In the SEM images, the negative control presented the worst loss of dental structure, with more porous enamel. Ca2+-MSNs were as effective as TiF4 and NaF to reduce the tooth structure loss.
Collapse
Affiliation(s)
- Fernanda Michel Tavares Canto
- Department of Pediatric Dentistry and Orthodontics, UFRJ - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Adílis Kalina Alexandria
- Department of Pediatric Dentistry and Orthodontics, UFRJ - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.,Department of Preventive and Community Dentistry, UERJ - Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Thiago Isidro Vieira
- Department of Pediatric Dentistry and Orthodontics, UFRJ - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | | | - Lúcio Mendes Cabral
- Department of Drugs and Medicines, School of Pharmacy, UFRJ - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Raphael Ferreira da Silva
- Department of Drugs and Medicines, School of Pharmacy, UFRJ - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Lucianne Cople Maia
- Department of Pediatric Dentistry and Orthodontics, UFRJ - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| |
Collapse
|
9
|
Olivan SRG, Sfalcin RA, Fernandes KPS, Ferrari RAM, Horliana ACRT, Motta LJ, Ortega SM, Pinto MM, Deana AM, Bussadori SK. Preventive effect of remineralizing materials on dental erosion lesions by speckle technique: An in vitro analysis. Photodiagnosis Photodyn Ther 2020; 29:101655. [PMID: 31923635 DOI: 10.1016/j.pdpdt.2020.101655] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/24/2019] [Accepted: 01/06/2020] [Indexed: 10/25/2022]
Abstract
The aim of this in vitro study was to evaluate the preventive effect of different materials on dental erosion lesions by speckle coherent light scattering analysis. Forty bovine teeth were divided in the following groups (n = 10): 1) DURA- Preventive Treatment with Fluoride Varnish (Duraphat, Colgate-Palmolive); 2) ELX- Preventive treatment with Elmex® Erosion Protection Toothpaste (GABA International AG, Therwil, Switzerland); 3) MP- Preventive treatment with MI Paste® (GC America); and 4) REG- Preventive Treatment with Regenerate Enamel Science™ (Unilever). For all groups, each sample was divided into 3 areas: non-treatment (control); preventive treatment + erosive challenge; non-treatment + erosive challenge. The erosive challenge was carried out using Sprite® Zero soft drink (pH 2.58). After the erosive challenge, the samples were evaluated by speckle coherent light scattering method in the eroded area compared to the sound area. The results showed that there was a statistically significant difference between eroded area with and without preventive treatment, however, there was no statistically significant difference among the different preventive materials tested.
Collapse
Affiliation(s)
- Silvia Regina Garcia Olivan
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| | - Ravana Angelini Sfalcin
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| | - Kristianne Porta Santos Fernandes
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| | - Raquel Agnelli Mesquita Ferrari
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| | - Anna Carolina Ratto Tempestini Horliana
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| | - Lara Jansiski Motta
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| | - Silvana Machado Ortega
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| | - Marcelo Mendes Pinto
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| | - Alessandro Melo Deana
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| | - Sandra Kalil Bussadori
- Postgraduate Program in Biophotonics Applied to Health Sciences and Rehabilitation Sciences, University Nove de Julho (UNINOVE), Vergueiro St., 235/249, ZIP: 01504-001, Liberdade, São Paulo, Brazil.
| |
Collapse
|
10
|
Gondim LD, Magalhães TC, Lopes AG, Aguiar MIB, Carlo HL, Barbosa TDS, Carvalho FGD. In Vitro Effect of Acidic Challenges on the Physical Properties of Dental Prosthesis Artificial Teeth. PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLÍNICA INTEGRADA 2020. [DOI: 10.1590/pboci.2020.091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
11
|
Justino IBDS, Alexandria AK, Canto FMT, Leite KLDF, Vieira TI, Cabral LM, Silva RFD, Maia LC. Comparative Effect of Calcium Mesoporous Silica Versus Calcium and/or Fluoride Products on the Reduction of Erosive Tooth Wear and Abrasive Enamel Lesion. PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLÍNICA INTEGRADA 2020. [DOI: 10.1590/pboci.2020.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
12
|
Alencar CDM, Leite KLDF, Ortiz MIG, Magno MB, Rocha GM, Silva CM, Maia LC. Morphological and chemical effects of in-office and at-home desensitising agents containing sodium fluoride on eroded root dentin. Arch Oral Biol 2019; 110:104619. [PMID: 31805483 DOI: 10.1016/j.archoralbio.2019.104619] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 11/15/2019] [Accepted: 11/15/2019] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the morphological and chemical effect of in-office and at-home desensitising agents containing sodium fluoride (NaF) on eroded root dentine in vitro. METHODS Fifty bovine dentine samples were pre-eroded and randomised into five groups (n = 10): G1 (Control) - milli-Q water; G2 - fluoride varnish containing NaF 22,500 ppm; G3 - desensitising cream containing NaF 9,000 ppm associated with 20% nanohydroxyapatite; G4 - toothpaste with NaF 5,000 ppm associated to tricalcium phosphate; G5 - toothpaste containing NaF 900 ppm and casein phosphopeptide-amorphous calcium phosphate fluoride (CPP-ACPF). The specimens were submitted to erosive challenge for three days. The analyses were performed using non-contact profilometry for volumetric (Sa) and linear roughness (Ra) followed by scanning electron microscopy (SEM) and Energy Dispersive X-ray Spectrometry (EDS). The data were analysed by Kruskal-Wallis and Wilcoxon tests (α = 0.05). RESULTS There was a significant reduction of Ra and Sa for the eroded samples from the G2 and G5 (p < 0.05) after an erosive challenge. The dentine surface topography pattern showed partially or totally occluded dentinal tubules after treatments, except in the control group. The control, G4 and G3 groups showed a reduction in the dentine inorganic content percentage of Ca (Calcium) and P (Phosphorus) minerals. CONCLUSION The fluoride varnish and CPP-ACPF toothpaste were able to prevent morphological changes and were the only materials that showed the Ca and P content increased after treatment. These materials may be promising alternatives in the clinical control of dentin erosion.
Collapse
Affiliation(s)
- Cristiane de Melo Alencar
- School of Dentistry, Federal University of Para, Augusto Correa Street, 01, Belém, 66075-110, PA, Brazil.
| | - Karla Lorene de França Leite
- Department of Pediatrics and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Av. Pedro Calmon, 550, Cidade Universitária, Rio de Janeiro, 21941-901, RJ, Brazil.
| | | | - Marcela Baraúna Magno
- Department of Pediatrics and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Av. Pedro Calmon, 550, Cidade Universitária, Rio de Janeiro, 21941-901, RJ, Brazil.
| | - Gustavo Miranda Rocha
- Institute of Biophysics Carlos Chagas Filho, Center for Health Sciences, Federal University of Rio de Janeiro, Av. Pedro Calmon, 550, Cidade Universitária, Rio de Janeiro, 21941-901, RJ, Brazil.
| | - Cecy Martins Silva
- School of Dentistry, Federal University of Para, Augusto Correa Street, 01, Belém, 66075-110, PA, Brazil.
| | - Lucianne Cople Maia
- Department of Pediatrics and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Av. Pedro Calmon, 550, Cidade Universitária, Rio de Janeiro, 21941-901, RJ, Brazil.
| |
Collapse
|
13
|
Rios D, Ionta FQ, Rebelato R, Jordão MC, Wang L, Magalhães AC, Honório HM. The effect of aspartame and pH changes on the erosive potential of cola drinks in bovine enamel: An in vitro study. J Clin Exp Dent 2018; 10:e933-e937. [PMID: 30386528 PMCID: PMC6203923 DOI: 10.4317/jced.54963] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 07/05/2018] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The aim of this study was to clarify the mechanism behind the different erosive potential of regular and light cola drinks: pH difference and/or aspartame presence. MATERIAL AND METHODS Sixty bovine enamel blocks were randomly divided into 5 groups: RC - regular cola, RCpH - addition of base to increase regular cola pH, RCAS - addition of aspartame to regular cola, LC - light cola, and LCpH - addition of acid to decrease light cola pH. Two-thirds of the blocks surface was coated with nail varnish for reference. The samples were daily subjected to four erosive challenges for 2 minutes. Between the erosive challenges (2h) and overnight the samples were maintained in artificial saliva. The response variable was the percentage surface hardness change (%SHC) after 1st experimental day and enamel surface loss (µm) measured at the 5th day by profilometry. Data were analyzed by ANOVA and Tukey's test (p<0.05). RESULTS Independently of the cola modifications, all groups promoted similar hardness change of enamel surface. RC promoted higher enamel loss (6.69±0.71µm) than LC (4.80±0.77µm). The acid addition to light cola (LCpH: 6.60±1.78µm) significantly enhanced its erosive potential, which did not differ from RC. The base addition to regular cola (RCpH-4.00±0.64µm) resulted in similar wear to LC. The addition of aspartame to the regular cola (RCAS 5.44±0.65µm) resulted in similar wear to LC and RC. CONCLUSIONS The data suggest that the pH alteration has a major impact on the erosive potential of cola drinks, however, the sweetener also has some influence. Key words:Tooth erosion, dental enamel, soft drinks, ph, sweetener.
Collapse
Affiliation(s)
- Daniela Rios
- Departments of Pediatric Dentistry, Orthodontics and Public Health
| | | | - Rafael Rebelato
- Departments of Pediatric Dentistry, Orthodontics and Public Health
| | | | - Linda Wang
- Departments of Restorative Dentistry, Endodontics and Dental Materials
| | | | | |
Collapse
|
14
|
Wierichs RJ, Stausberg S, Lausch J, Meyer-Lueckel H, Esteves-Oliveira M. Caries-Preventive Effect of NaF, NaF plus TCP, NaF plus CPP-ACP, and SDF Varnishes on Sound Dentin and Artificial Dentin Caries in vitro. Caries Res 2018; 52:199-211. [DOI: 10.1159/000484483] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 10/16/2017] [Indexed: 12/26/2022] Open
Abstract
The aim of this study was to compare the caries-preventive effect of different fluoride varnishes on sound dentin as well as on artificial dentin caries-like lesions. Bovine dentin specimens (n = 220) with one sound surface (ST) and one artificial caries lesion (DT) were prepared and randomly allocated to 11 groups. The interventions before pH cycling were as follows: application of a varnish containing NaF (22,600 ppm F-; Duraphat [NaF0/NaF1]), NaF plus tricalcium phosphate (22,600 ppm F-; Clinpro White Varnish Mint [TCP0/TCP1]), NaF plus casein phosphopeptide-stabilized amorphous calcium phosphate complexes (CPP-ACP; 22,600 ppm F-; MI Varnish [CPP0/CPP1]), or silver diamine fluoride (SDF; 35,400 ppm F-; Cariestop 30% [SDF0/SDF1]) and no intervention (NNB/N0/N1). During pH cycling (14 days, 6 × 120 min demineralization/day) half of the specimens in each group were brushed (10 s; 2 times/day) with either fluoride-free (“0”; e.g., TCP0) or 1,100 ppm F- (“1”; e.g., TCP1) dentifrice slurry. In another subgroup, the specimens were pH cycled but not brushed (NNB). Differences in integrated mineral loss (ΔΔZ), lesion depth (ΔLD), and colorimetric values (ΔΔE) were calculated between the values after initial demineralization and those after pH cycling, using transversal microradiography and photographic images. After pH cycling, no discoloration could be observed. Furthermore, NNB, N0, and N1 showed significantly increased ΔZDT/LDDT and ΔZST/LDST values, indicating further demineralization. In contrast, CPP0, CPP1, SDF0, and SDF1 showed significantly decreased ΔZDT/LDDT values, indicating remineralization (p ≤ 0.004; paired t test). CPP0, CPP1, SDF0, and SDF1 showed significantly higher changes in ΔΔZDT/ΔLDDT and ΔΔZST/ΔLDST than NNB, N0, and N1 (p < 0.001; Bonferroni post hoc test). In conclusion, under the conditions chosen, all fluoride varnishes prevented further demineralization. However, only NaF plus CPP-ACP and SDF could remineralize artificial dentin caries-like lesions under net-demineralizing conditions, thereby indicating that NaF plus CPP-ACP and SDF may be helpful to high-caries-risk patients.
Collapse
|
15
|
Mantilla TF, Turssi CP, Ramos-Oliveira TM, Silva CVD, Suzuki LC, Freitas PMD. The In Situ Effect of Titanium Tetrafluoride Gel on Erosion/Abrasion Progression in Human Dentin. Braz Dent J 2018; 28:337-345. [PMID: 29297555 DOI: 10.1590/0103-6440201601247] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 03/14/2017] [Indexed: 11/21/2022] Open
Abstract
Erosion incidence is increasing and its control is still a challenge in clinical practice. This study evaluated 4% TiF4-gel effects on eroded human dentin subjected to in situ erosive/abrasive episodes. Seventy-two previously eroded dentin slabs (0.05 M citric acid, pH 2.3, 20 min) were allocated to 6 groups (n=12) according to the treatment to be performed during the in situ phase and number of erosive/abrasive cycles, as follows: 4% TiF4-gel applied once (TiF41), twice (TiF42) or three times (TiF43) followed by 1, 2 and 3 erosive/abrasive cycles, respectively. Gel was applied before the beginning of the next cycle. Control groups were subjected to 1 (C1), 2 (C2) and 3 (C3) erosive/abrasive cycles only. A seventh group (n=12) comprised in vitro uneroded samples (UN) subjected to 3 erosive/abrasive cycles. Each cycle corresponded to 2 days of erosive (citric acid 0.5%, pH 2.6, 6x/day) and abrasive (electric toothbrush, 10 s/sample, 1 x/day) challenges. Samples were evaluated under profilometry and environmental scanning electron microscopy (ESEM). Atomic force microscopy images (AFM) were also made (n=3). Repeated measures 2-way ANOVA and Tukey test (p<0.001) showed that TiF42, which did not differ from TiF41 and TiF43, revealed a significant reduction in surface loss compared to all control groups. TiF41 and TiF43 showed no significant difference from C1, but both groups demonstrated significantly smaller surface loss than C2 and C3. ESEM and AFM micrographs suggested alterations on treated surfaces compared to samples from control groups, showing reduced diameters of dentinal tubules lumens. Therefore, TiF4 was able to reduce the progression of erosive/abrasive lesions.
Collapse
Affiliation(s)
| | - Cecilia Pedroso Turssi
- Institute and Dental Research Centre, Faculdade São Leopoldo Mandic, Campinas, SP, Brazil
| | | | | | | | | |
Collapse
|
16
|
Wang P, Gao J, Wang D, Snead ML, Li J, Ruan J. Optimizing concentration of titanium tetrafluoride solution for human dentine remineralization. Arch Oral Biol 2017; 83:7-12. [DOI: 10.1016/j.archoralbio.2017.06.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 05/28/2017] [Accepted: 06/14/2017] [Indexed: 02/06/2023]
|
17
|
Mantilla TF, Silva CVD, Ramos-Oliveira TM, Turssi CP, Ribeiro MS, Freitas PMD. TiF 4 gel effects on tubular occlusion of eroded/abraded human dentin. Microsc Res Tech 2017; 80:1182-1188. [PMID: 28758716 DOI: 10.1002/jemt.22915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 06/19/2017] [Accepted: 07/18/2017] [Indexed: 11/07/2022]
Abstract
This in situ study evaluated the tubular occlusion caused by 4% TiF4 gel on the surface of eroded/abraded dentin. Sixty human dentin samples were eroded in vitro and assigned into six groups (n = 10) according to the in situ surface treatment and number of cycling days: 4% TiF4 gel applied once (TiF4 1), twice (TiF4 2), or three times (TiF4 3) followed by 2, 4, and 6 days of erosive/abrasive in situ cycling, respectively. Control groups (no treatment) were subjected to 2 (C1), 4 (C2), and 6 (C3) days of erosive/abrasive in situ cycling only. A seventh group (n = 10) was comprised by in vitro uneroded samples (UN), subjected to 6 days of in situ erosive/abrasive cycling. Each cycling day consisted on six erosive (0.5% citric acid, pH 2.6) and one abrasive events. Environmental scanning electron microscopy micrographs were taken. For all groups, blinded examiners assessed dentin tubules occlusion using visual scores (0-unoccluded, 1-partially occluded by granular deposits, 2-partially occluded by reduction in tubular lumen into diamond shape, 3-completely occluded) on images captured prior and after the in situ phase. Scheirer-Ray-Hare test demonstrated that treatments significantly affected tubule occlusion (p < .001). Dunn's test showed that tubule occlusion in TiF4 3 was significantly higher than in C1. Tubule occlusion in remaining groups did not differ from that observed in groups TiF4 3 and C1. Tubule occlusion was significantly higher after in situ phase. It may be suggested that TiF4 , when applied three times, was able to positively change tubule occlusion of dentin samples.
Collapse
Affiliation(s)
| | | | | | - Cecilia Pedroso Turssi
- São Leopoldo Mandic Institute and Dental Research Center, Campinas, SP, 13045-755, Brazil
| | - Martha Simões Ribeiro
- Institute of Energy and Nuclear Research, University of São Paulo, São Paulo, SP, 05508-000, Brazil
| | | |
Collapse
|
18
|
Martines de Souza B, Vertuan M, Buzalaf MAR, Magalhães AC. The Impact of the Demineralized Organic Matrix on the Effect of TiF4 Varnish on the Progression of Dentin Erosive Loss. Caries Res 2017; 51:264-270. [DOI: 10.1159/000475534] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 04/05/2017] [Indexed: 11/19/2022] Open
Abstract
This in vitro study compared the effect of TiF4 varnish with that of NaF varnish, applied on pre-eroded bovine dentin samples, with respect to the progression of erosive loss, in the presence or absence of the demineralized organic matrix (DOM). One hundred and sixty bovine dentin samples were pre-eroded (0.1% citric acid, pH 2.5, 30 min). Half of the samples were subjected to the DOM removal (collagenase solution, 5 days). Samples with and without the DOM were treated according to the groups (n = 20 with DOM and 20 without DOM/group): TiF4 varnish (2.45% F), NaF varnish (2.45% F), placebo varnish (without fluoride) and control (no treatment). Thereafter, the treated samples were submitted to erosive challenges 4 × 90 s/day (0.1% citric acid, pH 2.5) during 7 days. Between the challenges, the samples were immersed in artificial saliva. The dentin erosive loss was measured using contact profilometry (µm, n = 15). Five dentin samples per group were prepared for energy-dispersive X-ray spectroscopy analysis. Data were compared using 2-way ANOVA/Bonferroni test (p < 0.05). Both fluoride varnishes were effective in reducing the erosive loss progression regardless of the dentin condition when compared to placebo varnish and control groups. Despite the fact that the TiF4 varnish was more effective than the NaF varnish for both dentin conditions (p < 0.001), its effect was significantly reduced in the absence of DOM (p < 0.05). It can be concluded that the TiF4 varnish is the best treatment in reducing the progression of dentin erosive loss (100%) in vitro, but its protective effect is more pronounced in the presence of DOM.
Collapse
|
19
|
In vitro enamel erosion and abrasion-inhibiting effect of different fluoride varnishes. Arch Oral Biol 2017; 77:39-43. [DOI: 10.1016/j.archoralbio.2017.01.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 11/18/2016] [Accepted: 01/15/2017] [Indexed: 01/29/2023]
|
20
|
Towards optimization of odonto/osteogenic bioengineering: in vitro comparison of simvastatin, sodium fluoride, melanocyte-stimulating hormone. In Vitro Cell Dev Biol Anim 2017; 53:502-512. [DOI: 10.1007/s11626-017-0141-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Accepted: 02/14/2017] [Indexed: 12/13/2022]
|
21
|
Altinci P, Mutluay M, Seseogullari-Dirihan R, Pashley D, Tjäderhane L, Tezvergil-Mutluay A. NaF Inhibits Matrix-Bound Cathepsin-Mediated Dentin Matrix Degradation. Caries Res 2016; 50:124-32. [DOI: 10.1159/000444222] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 01/24/2016] [Indexed: 11/19/2022] Open
Abstract
Matrix metalloproteinases (MMPs) and cysteine cathepsins (CCs) degrade the collagen fibrils of demineralized dentin. Sodium fluoride (NaF) has previously been shown to inhibit recombinant MMP-2 and MMP-9. This study aimed to evaluate the efficacy of NaF on the inhibition of dentin-bound MMPs and CCs. Dentin beams were completely demineralized in 10% phosphoric acid. The baseline total MMP activity and dry masses were measured. Beams were assigned to test groups based on similar MMP activity and dry mass (n = 10/group), and incubated in artificial saliva (control) or artificial saliva with NaF containing 6-238 mM fluoride for 1, 7 and 21 days. The dry mass loss and MMP activities were reassessed at each time point. The proteolytic activity was screened by gelatin zymography. ICTP and CTX released to the incubation medium were analyzed as indices of MMP and cathepsin K activity, respectively. The beams were examined under scanning electron microscopy. All NaF doses reduced the dry mass loss after 21 days (p < 0.05). NaF inhibition of the total MMP activity ranged between 5 and 80%. In gelatin zymography, the bands of MMP-2 and MMP-9 became less prominent with increasing NaF levels. NaF did not decrease the released ICTP (p > 0.05). Less CTX release was detected with F ≥179 mM (p < 0.05). CaF2-like minerals were observed on the beams. High levels of NaF may slow the degradation of the dentin matrix due to the inhibition of cathepsin K. Fluoride does not seem effective in the direct inhibition of proteolysis by dentin matrix-bound MMPs.
Collapse
|
22
|
GONDIM BLC, MEDEIROS IC, COSTA BP, CARLO HL, SANTOS RLD, CARVALHO FGD. Effects of erosive challenge on the morphology and surface properties of luting cements. REVISTA DE ODONTOLOGIA DA UNESP 2016. [DOI: 10.1590/1807-2577.022315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Abstract Introduction Few studies investigated the surface properties of luting cements after erosive challenge. Objective To evaluate the surface roughness (Ra), Vickers hardness (VHN) and morphology of 4 luting cements after erosive challenge. Material and method Twenty specimens of each cement were prepared (4×2mm) and divided into experimental (erosive challenge) and control (artificial saliva) groups (n=10): Rely X U200 (U200); Rely X ARC (ARC); Ketac Cem Easy Mix (Ketac) and Zinc phosphate (ZnP). The erosive challenge was performed by four daily erosive cycles (90s) in a cola drink and 2 h in artificial saliva over 7 days. Ra and VHN readings were performed before and after erosion. The percentage of hardness loss (%VHN) was obtained after erosion. The surface morphology was analyzed by scanning electron microscopy (SEM). ANOVA, Tukey and Student-T tests were used (α=0.05). Result After erosion, all luting cements had increase in Ra values and U200 and ZnP groups had the highest %VHN. After saliva immersion, only U200 and ZnP groups had significant increases in Ra values and there were no significant differences among the groups in %VHN. SEM analysis showed that Ketac and ZnP groups had rough and porous surfaces, and U200 group had higher resin matrix degradation than ARC group. Conclusion Erosive challenge with a cola drink affected the surface properties of all luting cements.
Collapse
|
23
|
Nemezio MA, Carvalho SC, Scatolin RS, Colucci V, Galo R, Corona SAM. Effect of Fluoride Varnish Combined with Er:YAG Laser on the Permeability of Eroded Dentin: An In Situ Study. Braz Dent J 2016; 26:671-7. [PMID: 26963215 DOI: 10.1590/0103-6440201300034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 11/08/2015] [Indexed: 11/22/2022] Open
Abstract
This study evaluated the combined effect of fluoride varnish and Er:YAG laser on the permeability of eroded bovine root dentin. After initial erosive challenge followed by a remineralization period, the specimens were divided in two groups according to the treatment - fluoride varnish and non-fluoride varnish - and were subdivided according to the irradiation protocol: Er:YAG laser (100 mJ, 3 Hz, 12.8 J/cm2per pulse, non-contact and defocus mode) and non-irradiated. After a lead-in period, 7 volunteers wore a palatal device containing 4 specimens that were subjected to erosive challenges. At the first experimental phase, 4 volunteers used specimens treated with fluoride varnish and fluoride varnish+Er:YAG laser and 3 volunteers used specimens treated with non-fluoride varnish and non-fluoride varnish+Er:YAG laser. After a washout period, volunteers were crossed to treatments, characterizing a 2x2 crossover experiment. At the end of the experimental phase, the quantitative response variable was obtained by permeability analysis and the qualitative response by scanning electron microscopy (SEM). Two-way ANOVA and Tukey-Kramer's test revealed that specimens treated with fluoride varnish+Er:YAG laser showed the lowest permeability and a significant difference was found between this group and the others. When varnish (fluoride/non-fluoride) was applied in the absence of Er:YAG laser, higher permeability was found when compared to the laser-treated groups. SEM evaluations showed partially or completely obliterated dentinal tubules when specimens were treated with fluoride varnish+Er:YAG laser. It may be concluded that Er:YAG laser was able to control the permeability of eroded root dentin and the combination with fluoride varnish increased laser action.
Collapse
Affiliation(s)
- Mariana Alencar Nemezio
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, USP, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Sandra Chiga Carvalho
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Universidade de São Paulo USP, Ribeirão Preto, SP, Brazil
| | - Renata Siqueira Scatolin
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Universidade de São Paulo USP, Ribeirão Preto, SP, Brazil
| | - Vivian Colucci
- Department of Restorative Dentistry, UNAERP- Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Rodrigo Galo
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto,, USP - Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Silmara Aparecida Milori Corona
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Universidade de São Paulo USP, Ribeirão Preto, SP, Brazil
| |
Collapse
|
24
|
Castilho ARFD, Salomão PMA, Buzalaf MAR, Magalhães AC. Protective effect of experimental mouthrinses containing NaF and TiF4 on dentin erosive loss in vitro. J Appl Oral Sci 2016; 23:486-90. [PMID: 26537719 PMCID: PMC4621941 DOI: 10.1590/1678-775720150127] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 07/21/2015] [Indexed: 11/22/2022] Open
Abstract
Objective This in vitro study assessed the anti-erosive effect of experimental mouthrinses containing TiF4 and NaF on dentin erosive loss. Material and Methods Bovine dentin specimens were randomly allocated into the groups (n=15): 1) SnCl2/NaF/AmF (Erosion Protection®/GABA, pH 4.5, positive control); 2) experimental solution with 0.0815% TiF4 (pH 2.5); 3) 0.105% NaF (pH 4.5); 4) 0.042% NaF+0.049% TiF4 (pH 4.4); 5) 0.063% NaF+0.036% TiF4 (pH 4.5); 6) no treatment (negative control). Each specimen was cyclically demineralized (Sprite Zero, pH 2.6, 4x90 s/day) and exposed to artificial saliva between the erosive challenges for 7 days. The treatment with the fluoride solutions was done 2x60 s/day, immediately after the first and the last erosive challenges of the day. Dentin erosive loss was measured by profilometry (μm). The data were analyzed using Kruskal Wallis/Dunn tests (p<0.05). Results Mouthrinses containing TiF4 or Sn/F were able to show some protective effect against dentin erosive loss compared to negative control. The best anti-erosive effect was found for experimental solution containing 0.0815% TiF4 (100% reduction in dentin loss), followed by 0.042% NaF+0.049% TiF4 (58.3%), SnCl2/NaF/AmF (52%) and 0.063% NaF+0.036% TiF4 (40%). NaF solution (13.3%) did not significantly differ from control. Conclusion The daily application of experimental mouthrinse containing TiF4 and NaF has the ability to reduce dentin erosion, as well as Erosion Protection® and TiF4 alone.
Collapse
Affiliation(s)
- Aline Rogéria Freire de Castilho
- Departamento de Ciências Fisiológicas, Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas, Campinas, SP, Brazil
| | - Priscila Maria Aranda Salomão
- Departamento de Ciências Biológicas, Faculdade de Odontologia de Bauru, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Marília Afonso Rabelo Buzalaf
- Departamento de Ciências Biológicas, Faculdade de Odontologia de Bauru, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Ana Carolina Magalhães
- Departamento de Ciências Biológicas, Faculdade de Odontologia de Bauru, Universidade de São Paulo, São Paulo, SP, Brazil
| |
Collapse
|
25
|
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.
Collapse
Affiliation(s)
- Graziela Ribeiro Batista
- Department of Preventive Dentistry, Periodontology and Cariology, University of Zurich, Zurich, Switzerland
| | | | | | | | | |
Collapse
|
26
|
Chiga S, Toro CVT, Lepri TP, Turssi CP, Colucci V, Corona SAM. Combined effect of fluoride varnish to Er:YAG or Nd:YAG laser on permeability of eroded root dentine. Arch Oral Biol 2015; 64:24-7. [PMID: 26752225 DOI: 10.1016/j.archoralbio.2015.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 12/17/2015] [Accepted: 12/22/2015] [Indexed: 11/16/2022]
Abstract
OBJECTIVE This study evaluated the combined effect of fluoride varnish to Er:YAG or Nd:YAG laser on permeability of eroded root dentine. DESIGN Sixty slabs of bovine root dentine (2×2×2mm) were eroded with citric acid 0.3% (pH 3.2) during 2h and then kept in artificial saliva during 24h. Specimens were randomly assigned in 6 groups (n=10), to receive the following treatments: fluoride varnish; fluoride varnish+Er:YAG laser; fluoride varnish+Nd:YAG laser; non-fluoride varnish; non-fluoride varnish+Er:YAG laser; non-fluoride varnish+Nd:YAG laser. The Er:YAG (100mJ, 3Hz) and Nd:YAG (70mJ, 15Hz) were applied for 10s. Specimens were subjected to further erosive challenges with citric acid 0.3% 4×/day, during 1min, for 5 days, remaining in artificial saliva between cycles. Dentin permeability was then assessed. Two-way ANOVA demonstrated no significant interaction between laser and varnish (p=0.858). RESULTS No effect was also detected for the main factor varnish (p=0.768), while permeability of eroded root dentin was significantly lower when such substrate was laser-irradiated, no matter the laser source (p<0.001). CONCLUSIONS This study concluded that Er:YAG and Nd:YAG lasers can be employed to control the permeability of eroded root dentin, regardless of fluoride varnish application.
Collapse
Affiliation(s)
- Sandra Chiga
- University of São Paulo, School of Dentistry of Ribeirão Preto-USP, Department of Restorative Dentistry, Ribeirão Preto, Av. do café, s/n, Monte Alegre, CEP:14040-904 São Paulo, Brazil
| | - Carmen Victoria Torres Toro
- University of São Paulo, School of Dentistry of Ribeirão Preto-USP, Department of Restorative Dentistry, Ribeirão Preto, Av. do café, s/n, Monte Alegre, CEP:14040-904 São Paulo, Brazil
| | - Taísa Penazzo Lepri
- University of São Paulo, School of Dentistry of Ribeirão Preto-USP, Department of Restorative Dentistry, Ribeirão Preto, Av. do café, s/n, Monte Alegre, CEP:14040-904 São Paulo, Brazil
| | - Cecília Petroso Turssi
- São Leopoldo Mandic Institute and Dental Research Center, Department of Restorative Dentistry, Campinas, Rua Dr. José Rocha Junqueira, 13, Swift, CEP:13045-755 São Paulo, Brazil
| | - Vivian Colucci
- University of São Paulo, School of Dentistry of Ribeirão Preto-USP, Department of Restorative Dentistry, Ribeirão Preto, Av. do café, s/n, Monte Alegre, CEP:14040-904 São Paulo, Brazil
| | - Silmara Aparecida Milori Corona
- University of São Paulo, School of Dentistry of Ribeirão Preto-USP, Department of Restorative Dentistry, Ribeirão Preto, Av. do café, s/n, Monte Alegre, CEP:14040-904 São Paulo, Brazil.
| |
Collapse
|
27
|
Lee BS, Chou PH, Chen SY, Liao HY, Chang CC. Prevention of enamel demineralization with a novel fluoride strip: enamel surface composition and depth profile. Sci Rep 2015; 5:13352. [PMID: 26293361 PMCID: PMC4543969 DOI: 10.1038/srep13352] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 07/21/2015] [Indexed: 11/10/2022] Open
Abstract
There is no topically applicable low concentration fluoride delivery device available for caries prevention. This study was aimed to assess the use of a low concentration (1450 ppm) fluoride strip as an effective fluoride delivery system against enamel demineralization. The enamel surface composition and calcium-deficient hydroxyapatite or toothpaste treatments were investigated using X-ray photoelectron spectroscopy. In vitro enamel demineralization was assayed using a pH cycling model and the dissolution of calcium ions from the treated specimens was quantified using ion chromatography. After 24-hr fluoride-strip treatment, the enamel was covered with a CaF2 layer which showed a granular morphology of 1 μm in size. Below the CaF2 layer was a region of mixed fluorapatite and CaF2. Fluoride infiltrated extensively in enamel to produce highly fluorinated fluorohydroxyapatite. In comparison, low-fluoride-level fluorinated fluorohydroxyapatite was formed on the enamel specimen exposed to toothpaste. The treatments with the fluoride strip as short as 1 hr significantly inhibited enamel demineralization. The fluoride strip was effective for topical fluoride delivery and inhibited in vitro demineralization of enamel by forming CaF2 and fluoride-containing apatites at the enamel surface. It exhibited the potential as an effective fluoride delivery device for general use in prevention of caries.
Collapse
Affiliation(s)
- Bor-Shiunn Lee
- Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University and National Taiwan University Hospital, No.1, Changde St., Jhongjheng District, Taipei 100, Taiwan
| | - Po-Hung Chou
- Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University and National Taiwan University Hospital, No.1, Changde St., Jhongjheng District, Taipei 100, Taiwan
| | - Shu-Yu Chen
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Hua-Yang Liao
- Research Center for Applied Sciences, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei 11529, Taiwan
| | - Che-Chen Chang
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| |
Collapse
|
28
|
Comar LP, Cardoso CDAB, Charone S, Grizzo LT, Buzalaf MAR, Magalhães AC. TiF4 and NaF varnishes as anti-erosive agents on enamel and dentin erosion progression in vitro. J Appl Oral Sci 2015; 23:14-8. [PMID: 25760263 PMCID: PMC4349114 DOI: 10.1590/1678-775720140124] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 07/29/2014] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE This study assessed the effect of fluoride varnishes on the progression of tooth erosion in vitro. MATERIAL AND METHODS Forty-eight enamel and 60 root dentin samples were previously demineralized (0.1% citric acid, pH 2.5, 30 min), leading to a baseline and erosive wear of 12.9 and 11.4 µm, respectively. The samples were randomly treated (6 h) with a 4% TiF4 varnish (2.45%F-, pH 1.0), a 5.42% NaF varnish (2.45%F-, pH 5.0), a placebo varnish and no varnish (control). The samples were then subjected to erosive pH cycles (4x90 s/day in 0.1% citric acid, intercalated with artificial saliva) for 5 days. The increment of the erosive tooth wear was calculated. In the case of dentin, this final measurement was done with and without the demineralized organic matrix (DOM). Enamel and dentin data were analyzed using ANOVA/Tukey's and Kruskal-Wallis/Dunn tests, respectively (p<0.05). RESULTS The TiF4 (mean±s.d: 1.5±1.1 µm) and NaF (2.1±1.7 µm) varnishes significantly reduced enamel wear progression compared to the placebo varnish (3.9±1.1 µm) and control (4.5±0.9 µm). The same differences were found for dentin in the presence and absence of the DOM, respectively: TiF4 (average: 0.97/1.87 µm), NaF (1.03/2.13 µm), placebo varnish (3.53/4.47 µm) and control (3.53/4.36 µm). CONCLUSION The TiF4 and NaF varnishes were equally effective in reducing the progression of tooth erosion in vitro.
Collapse
Affiliation(s)
- Livia Picchi Comar
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | | | - Senda Charone
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Larissa Tercilia Grizzo
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | | | - Ana Carolina Magalhães
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| |
Collapse
|
29
|
Moezizadeh M, Alimi A. The effect of casein phosphopeptide-amorphous calcium phosphate paste and sodium fluoride mouthwash on the prevention of dentine erosion: An in vitro study. J Conserv Dent 2014; 17:244-9. [PMID: 24944448 PMCID: PMC4056396 DOI: 10.4103/0972-0707.131787] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 02/28/2014] [Accepted: 03/12/2014] [Indexed: 11/12/2022] Open
Abstract
Aim: The purpose was to compare the effect of 0.2% sodium fluoride mouthwash and casein phosphopeptide-amorphous calcium phosphate paste on prevention of dentin erosion. Materials and Methods: Buccal surfaces of 36 sound premolar teeth were ground flat and polished with abrasive discs. Half the polished surfaces were covered with tape to maintain a reference surface. Samples were randomly allocated into three groups. Group A was pretreated with tooth mousse (TM) 4 times a day for 5 days. Group B was pretreated with 0.2% sodium fluoride mouthwash 4 times a day for 5 days. Group C was considered as the control group with no pretreatment. In the next step, the samples were exposed to Coca-Cola 4 times a day for 3 days. After each erosive cycle, the samples were rinsed with deionized water and stored in artificial saliva. The surface loss was determined using profilometry. Results: The erosion in both Groups A and B was less than the control group. The surface loss in mouthwash group was significantly lower than in the control group. Erosion in TM group was more than the mouthwash group and less than the control group. Conclusion: Sodium fluoride mouthwash is more effective for prevention of dentin erosion.
Collapse
Affiliation(s)
- Maryam Moezizadeh
- Associate Professor, Department of Operative Dentistry, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Azar Alimi
- Department of Operative Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
30
|
Magalhães AC, Levy FM, Rizzante FA, Rios D, Buzalaf MAR. Effect of NaF and TiF(4) varnish and solution on bovine dentin erosion plus abrasion in vitro. Acta Odontol Scand 2012; 70:160-4. [PMID: 21780973 DOI: 10.3109/00016357.2011.600711] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES This in vitro study aimed to analyze the effect of TiF(4) compared to NaF varnishes and solutions, to protect against dentin erosion associated with abrasion. MATERIALS AND METHODS Bovine dentin specimens were pre-treated with NaF-Duraphat (2.26% F), NaF/CaF(2)-Duofluorid (5.63% F), experimental-NaF (2.45% F), experimental-TiF(4) (2.45% F) and placebo varnishes; NaF (2.26% F) and TiF(4) (2.45% F) solutions. Controls remained untreated. The erosive pH cycling was performed using a soft drink (pH 2.6) 4 × 90 s/day and the toothbrushing-abrasion 2 × 10 s/day, in vitro for 5 days. Between the challenges, the specimens were exposed to artificial saliva. Dentin tissue loss was measured profilometrically (μm). RESULTS ANOVA/Tukey's test showed that all fluoridated varnishes (Duraphat, 7.5 ± 1.1; Duofluorid, 6.8 ± 1.1; NaF, 7.2 ± 1.9; TiF(4), 6.5 ± 1.0) were able to significantly reduce dentin tissue loss (40.7% reduction compared to control) when compared to placebo varnish (11.2 ± 1.3), control (11.8 ± 1.7) and fluoridated (NaF, 9.9 ± 1.8; TiF(4), 10.3 ± 2.1) solutions (p < 0.0001), which in turn did not significantly differ from each other. CONCLUSION All fluoridated varnishes, but not the solutions, had a similar performance and a good potential to reduce dentin tissue loss under mild erosive and abrasive conditions in vitro. Risk patients for erosion and abrasion, especially those with exposed dentin, should benefit from this clinical preventive measure. Further research has to confirm this promising result in the clinical situation.
Collapse
Affiliation(s)
- Ana Carolina Magalhães
- Department of Biological Sciences, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo–Bauru, SP, Brazil.
| | | | | | | | | |
Collapse
|
31
|
YU H, BUCHALLA W, CHENG H, WIEGAND A, ATTIN T. Topical fluoride application is able to reduce acid susceptibility of restorative materials. Dent Mater J 2012; 31:433-42. [PMID: 22673456 DOI: 10.4012/dmj.2011-106] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
32
|
Levy FM, Magalhães AC, Gomes MF, Comar LP, Rios D, Buzalaf MAR. The erosion and abrasion-inhibiting effect of TiF(4) and NaF varnishes and solutions on enamel in vitro. Int J Paediatr Dent 2012; 22:11-6. [PMID: 21689178 DOI: 10.1111/j.1365-263x.2011.01151.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE. Previous in vitro study has shown that TiF(4) varnish might reduce enamel erosion. No data regarding the effect of this experimental varnish on enamel erosion plus abrasion, however, are available so far. Thus, this in vitro study aimed to analyse the effect of TiF(4) compared with NaF varnishes and solutions, to protect against enamel erosion with or without abrasion. METHODS. Enamel specimens were pre-treated with experimental-TiF(4) (2.45% F), experimental-NaF (2.45% F), NaF-Duraphat (2.26% F), and placebo varnishes; NaF (2.26% F) and TiF(4) (2.45% F) solutions. Controls remained untreated. The erosive challenge was performed using a soft drink (pH 2.6) 4 × 90 s/day (ERO) and the toothbrushing abrasion (ERO+ABR) 2 × 10 s/day, for 5 days. Between the challenges, the specimens were exposed to artificial saliva. Enamel loss was measured profilometrically (μm). RESULTS. Kruskal-Wallis/Dunn tests showed that all fluoridated varnishes (TiF(4) -ERO:0.53 ± 0.20, ERO+ABR:0.65 ± 0.19/NaF-ERO:0.94 ± 0.18, ERO+ABR:1.74 ± 0.37/Duraphat-ERO:1.00 ± 0.37, ERO+ABR:1.72 ± 0.58) were able to significantly reduce enamel loss when compared with placebo varnish (ERO:3.45 ± 0.41/ERO+ABR:3.20 ± 0.66) (P < 0.0001). Placebo varnish, control (ERO:2.68 ± 0.53/ERO+ABR:3.01 ± 0.34), and fluoridated (NaF-ERO:2.84 ± 0.09/ERO+ABR:2.40 ± 0.21/TiF(4) -ERO:3.55 ± 0.59/ERO+ABR:4.10 ± 0.38) solutions did not significantly differ from each other. CONCLUSION. Based on the results, it can be concluded that the TiF(4) varnish seems to be a promising treatment to reduce enamel loss under mild erosive and abrasive conditions in vitro.
Collapse
Affiliation(s)
- Flávia Mauad Levy
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | | | | | | | | | | |
Collapse
|
33
|
Mondal D, Bellucci L, Lepore SD. A Direct and Stereoretentive Synthesis of Amides from Cyclic Alcohols. European J Org Chem 2011; 2011:10.1002/ejoc.201101165. [PMID: 24273447 PMCID: PMC3835365 DOI: 10.1002/ejoc.201101165] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Indexed: 12/31/2022]
Abstract
Chlorosulfites prepared in situ using thionyl chloride react with nitrile complexes of titanium (IV) fluoride to give a one-pot conversion of alcohols into amides. For the first time, amides are obtained from cyclic alcohols with stereoretention. Critical to the design of these new Ti(IV) reactions has been the use of little explored Ti(IV) nitrile complexes which are thought to chelate chlorosulfites in the transition state to create a carbocation that is rapidly captured by the nitrile nucleophile via a front-side attack mechanism.
Collapse
Affiliation(s)
- Deboprosad Mondal
- Department of Chemistry, Florida Atlantic University, Boca Raton, Florida 33431, Fax: 561.297.2759
| | - Luca Bellucci
- Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, Italy
| | - Salvatore D. Lepore
- Department of Chemistry, Florida Atlantic University, Boca Raton, Florida 33431, Fax: 561.297.2759
| |
Collapse
|
34
|
Magalhães AC, Romanelli AC, Rios D, Comar LP, Navarro RS, Grizzo LT, Aranha ACC, Buzalaf MAR. Effect of a single application of TiF4 and NaF varnishes and solutions combined with Nd:YAG laser irradiation on enamel erosion in vitro. Photomed Laser Surg 2011; 29:537-44. [PMID: 21595551 DOI: 10.1089/pho.2010.2886] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE This in vitro study aimed to analyze the influence of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser irradiation on the efficacy of titanium tetrafluoride (TiF(4)) and sodium fluoride (NaF) varnishes and solutions to protect enamel against erosion. BACKGROUND DATA The effect of Nd:YAG laser irradiation on NaF and AmF was analyzed; however, there is no available data on the interaction between Nd:YAG laser irradiation and TiF(4). METHODS Bovine enamel specimens were pre-treated with NaF varnish, TiF(4) varnish, NaF solution, TiF(4) solution, placebo varnish, Nd:YAG (84.9 J/cm(2)), Nd:YAG prior to or through NaF varnish, Nd:YAG prior to or through TiF(4) varnish, Nd:YAG prior to or through NaF solution, Nd:YAG prior to or through TiF(4) solution, and Nd:YAG prior to or through placebo varnish. Controls remained untreated. Ten specimens in each group were then subjected to an erosive demineralization (Sprite Zero, 4 × 90 s/day) and remineralization (artificial saliva, between the erosive cycles) cycling for 5 days. Enamel loss was measured profilometrically (μm). Additionally, treated but non-eroded specimens were additionally analyzed by scanning electron microscope (SEM) (each group n = 2). The data were statistically analyzed by ANOVA and Tukey's post-hoc test (p < 0.05). RESULTS Only TiF(4) varnish (1.8 ± 0.6 μm), laser prior to TiF(4) varnish (1.7 ± 0.3 μm) and laser prior to TiF(4) solution (1.4 ± 0.3 μm) significantly reduced enamel erosion compared to the control (4.1 ± 0.6 μm). SEM pictures showed that specimens treated with TiF(4) varnish presented a surface coating. CONCLUSIONS Nd:YAG laser irradiation was not effective against enamel erosion and it did not have any influence on the efficacy of F, except for TiF(4) solution. On the other hand, TiF(4) varnish protected against enamel erosion, without the influence of laser irradiation.
Collapse
Affiliation(s)
- Ana Carolina Magalhães
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Castro PS, Lima AS, Ferreira TL, Bertotti M. Scanning Electrochemical Microscopy as a Tool for the Characterization of Dental Erosion. INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY 2011. [DOI: 10.4061/2011/952470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
When the tooth is exposed to acidic environments, an irreversible loss of dental hard tissue occurs in a process called dental erosion. In this work, the scanning electrochemical microscopy (SECM) was used to probe the consumption of protons at the vicinity of a tooth surface with a platinum microelectrode fixed at −0.5 (V) versus Ag/AgCl/KCl(sat). SECM approach curves were recorded to assess the extent of diffusion in the solution close to the tooth substrate. SECM images clearly demonstrated that the acid erosion process is very fast at solution pH values in the range between 3 and 4.
Collapse
Affiliation(s)
- Pollyana S. Castro
- Instituto de Química, Universidade de São Paulo (USP), 05508-900 São Paulo, SP, Brazil
| | - Alex S. Lima
- Instituto de Química, Universidade de São Paulo (USP), 05508-900 São Paulo, SP, Brazil
| | - Tiago L. Ferreira
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo (UNIFESP), Campus Diadema, 09972-270 Diadema, SP, Brazil
| | - Mauro Bertotti
- Instituto de Química, Universidade de São Paulo (USP), 05508-900 São Paulo, SP, Brazil
| |
Collapse
|
36
|
West N, Davies M, Amaechi B. In vitro and in situ Erosion Models for Evaluating Tooth Substance Loss. Caries Res 2011; 45 Suppl 1:43-52. [DOI: 10.1159/000325945] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|