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Keratibumrungpong K, Trairatvorakul C, Jirakran K, Govitvattana N. A Comparison of the Fluoride 'Paint- On' vs Tray Application Techniques for Enamel Remineralisation. Int Dent J 2024:S0020-6539(24)00085-6. [PMID: 38614880 DOI: 10.1016/j.identj.2024.03.003] [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: 12/05/2023] [Revised: 02/28/2024] [Accepted: 03/03/2024] [Indexed: 04/15/2024] Open
Abstract
BACKGROUND Fluoride gel treatment is not recommended for children < 6 years old due to its potential toxicity. Hence the aim of this study was to compare the effect of 1.23% acidulated-phosphate fluoride (APF) gel paint-on and the conventional tray application techniques on artificial, deciduous enamel carious lesions embedded on wearable appliances. METHODS In a randomised crossover study, the volunteer children (n = 29) wore mandibular removable appliances containing embedded tooth specimens with artificial carious lesions. The volunteers had 3 different treatment protocols: (I) 0.4 mL non-fluoride (control) gel, (II) 0.4 mL paint-on 1.23% APF gel or (III) 5 mL 1.23% APF gel, 4 minutes tray application. After 1 hour, the appliances were removed and the specimens underwent an in vitro, 14 days of pH-cycling. The mean percentage reduction in fluorescence (ΔF, %) at baseline (ΔF0) and after the pH-cycling (ΔF1) were determined using quantitative light-induced fluorescence-digital analysis. The mean ΔΔF (ΔF1-ΔF0) was calculated to compare the differences between groups. RESULTS The mean ΔΔF of groups I to III were -1.42 ± 1.49, 1.06 ± 2.11, and 1.12 ± 3.57 and -1.25 ± 1.44, 1.13 ± 1.84 and 1.44 ± 3.62 for the smooth surface and proximal surface lesions, respectively. The mean ΔΔF in the 2 treatment groups were significantly greater compared with the control group (P < .001). There was no significant difference in ΔΔF between the APF gel tray and paint-on groups either in the smooth surfaces, or the proximal surfaces (P = .629 and P = .613, respectively). CONCLUSION Our study, for the first time, indicates that the paint-on application of APF gel or the tray application of APF had a similar enamel remineralisation effect. Clinically, this implies that, particularly in younger children, the paint-on application of fluoride is less cumbersome, and possibly more tolerable with a lesser likelihood of fluoride ingestion than the tray application technique. TRIAL REGISTRATION Thai Clinical Trial Registry (https://www.thaiclinicaltrials.org/show/TCTR20190724001).
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Affiliation(s)
- Keratiporn Keratibumrungpong
- Department of Pediatric Dentistry, Faculty of Dentistry, Pediatric Dentistry Residency Program, Chulalongkorn University, Bangkok, Thailand
| | - Chutima Trairatvorakul
- Department of Pediatric Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Ketsupar Jirakran
- Department of Pediatrics, Center of Excellence for Maximizing Children's Developmental Potential, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Nattanan Govitvattana
- Department of Pediatric Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
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Bedir F, Karadas M. Evaluation of Color Stability and Translucency of Different Composite Resins Exposed to Alcohol. Niger J Clin Pract 2024; 27:394-400. [PMID: 38528362 DOI: 10.4103/njcp.njcp_90_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 02/14/2024] [Indexed: 03/27/2024]
Abstract
BACKGROUND As there is evidence showing the effects of alcohol on the surface properties of composite resins, it is of great importance to understand the effects of commonly consumed beverages on the discoloration of composite restorations in people who consume alcohol. AIM The aim of this study was to investigate the changes in the color and translucency of composite resins immersed in different beverages after exposure to alcohol. METHODS Disk-shaped samples from each composite resin (Filtek Z250 (Z250), Clearfil Majesty Esthetic (CME), and Esthelite Bulk Fill Flow (EBF), were prepared (n = 60) and randomly divided into two groups (exposed or unexposed to alcohol). The samples were immersed in distilled water, black tea, and coffee. The color parameter (∆E00) and translucency parameter (∆TP) were calculated after 24 h, 1 week, and 3 weeks. Four-way ANOVA and Tukey's post-hoc analysis were used for the statistical analysis (α = 0.05). RESULTS Alcohol significantly increased the discoloration of Z250 and EBF in black tea. The discoloration of CME was not affected by alcohol exposure. Z250 and EBF showed clinically unacceptable discoloration (ΔE00 > 2.25) after immersion in black tea and coffee, whereas CME showed clinically unacceptable discoloration after immersion in black tea. Black tea caused the greatest color change in all composite materials regardless of alcohol exposure. EBF showed the lowest ΔTP values (∆TP = -1.82) at 3 weeks of immersion in black tea. CONCLUSIONS The effect of alcohol on discoloration depended on the composite type used. The translucency of bulk-fill flowable composite decreased with alcohol exposure.
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Affiliation(s)
- F Bedir
- Faculty of Dentistry, Department of Restorative Dentistry, Recep Tayyip Erdogan University, Rize, Türkiye
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Athanasiadou D, Eymael D, Hajhamid B, Carneiro KMM, Prakki A. Chemical and Ultrastructural Characterization of Dentin Treated with Remineralizing Dentifrices. J Funct Biomater 2024; 15:25. [PMID: 38248692 PMCID: PMC10816979 DOI: 10.3390/jfb15010025] [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: 12/14/2023] [Revised: 01/09/2024] [Accepted: 01/13/2024] [Indexed: 01/23/2024] Open
Abstract
The aim of this study is to investigate dentin chemical and ultrastructural changes upon exposure to remineralizing dentifrices. Dentin disks were obtained from permanent human molars and treated for 7 days with the dentifrices: (1) C group-control (no dentifrice); (2) S group-Sensodyne Repair & Protect; (3) D group-Dentalclean Daily Regenerating Gel; and (4) DB group-D group + Dentalclean regenerating booster. Afterwards, samples were submitted to an additional 7 days of toothbrushing associated with daily acidic challenge. Samples were imaged and analyzed (days 1, 7, and 14) for Young's modulus by atomic force microscopy (AFM), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and selected area electron diffraction (SAED). SEM and AFM revealed precipitate deposition on dentin surfaces in groups S, D, and DB, formed as early as day 1. Surface elemental analysis showed a Si increase on all brushed surfaces. Similar surface morphology was maintained after the acidic challenge period. Bright-field TEM/SAED revealed the formation of nanocrystalline hydroxyapatite inside the dentin tubules of groups S, D, and DB after day 7. Group C presented a gradual reduction of Young's modulus from days-1-14, whereas all remaining groups had increased values. All evaluated dentifrices led to successful formation of hydroxyapatite and increased dentin stiffness.
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Affiliation(s)
- Dimitra Athanasiadou
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (D.A.); (D.E.); (B.H.)
| | - Denise Eymael
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (D.A.); (D.E.); (B.H.)
| | - Beshr Hajhamid
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (D.A.); (D.E.); (B.H.)
| | - Karina M. M. Carneiro
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (D.A.); (D.E.); (B.H.)
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
| | - Anuradha Prakki
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (D.A.); (D.E.); (B.H.)
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Hajhamid B, Bozec L, Tenenbaum H, De Souza G, Somogyi-Ganss E. Effect of artificial aging on optical properties and crystalline structure of high-translucency zirconia. J Prosthodont 2024; 33:61-69. [PMID: 36641491 DOI: 10.1111/jopr.13648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 01/10/2023] [Accepted: 01/10/2023] [Indexed: 01/16/2023] Open
Abstract
PURPOSE To investigate the effect of different in vitro aging protocols on the optical properties and crystalline structure of high-translucency (HT) zirconia. MATERIALS AND METHODS Thirty-six specimens of HT and extra-high translucency (XT) zirconia were divided into three groups: control (CO)-no treatment; hydrothermal aging (HA)-autoclave aging for 12.5 h at 134°C, 2 bar; clinically related aging (CRA)-aging in the chewing simulator for 1.2 million cycles, followed by 50,000 thermocycles (5-55°C) and immersion in HCl (pH 1.2) for 15 h. Optical properties, crystalline structure, and surface roughness were analyzed and compared using analysis of variance (5% significance level). RESULTS There was no statistically significant effect of aging on translucency (p = 0.10), but CRA promoted the development of a high contrast ratio (p = 0.03). Aging did not cause significant color changes for HT (p = 0.65) or XT (p = 0.36). The proportion of monoclinic crystals increased to 40% for HT-zirconia after HA and 5% after CRA. No monoclinic crystals were detected for XT groups. There was no effect of aging on surface roughness (p = 0.77). CONCLUSIONS Although hydrothermal aging has been widely used to verify zirconia crystalline stability, it did not generate an effect similar to clinically related aging on the optical properties and crystalline structure of zirconia. HA affected the crystalline structure of HT-zirconia, and CRA compromised the optical properties of XT zirconia.
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Affiliation(s)
- Beshr Hajhamid
- Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Laurent Bozec
- Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Howard Tenenbaum
- Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Grace De Souza
- Department of Comprehensive Dentistry, School of Dentistry, University of Louisville, Louisville, Kentucky, USA
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Fitzgerald JM, Souza GD, Tam L. Effect of Tooth Bleach on Dentin Fatigue Resistance in Situ. Oper Dent 2023; 48:638-647. [PMID: 37881145 DOI: 10.2341/22-093-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/10/2023] [Indexed: 10/27/2023]
Abstract
BACKGROUND Negative effects of bleaching on dentin have previously been reported in vitro. OBJECTIVE The purpose of this study was to determine the effect of carbamide peroxide bleaching on dentin fatigue resistance using a clinically relevant in situ model. METHODS AND MATERIALS Following research ethics board approval, 60 human teeth requiring extraction were collected. Sterilized human dentin specimens were cut (1.2x1.2x10 mm) and secured into customized bleaching trays to be used by study participants. Participants were randomly assigned to either bleach (10% carbamide peroxide, n=23) or control (gel without bleach, n=26) treatment groups. Treatment was applied to the bleaching trays and worn overnight by participants for 14 days. After treatment completion, dentin specimens were removed from the bleaching trays and subjected to fatigue testing (10 N, 3 mm/s, 2x105 cycles) while submerged in artificial saliva. Kaplan-Meier survival analysis was conducted to compare the number of cycles to failure during fatigue testing in both groups. A log rank test was run to determine if there were differences in the survival distribution between the two groups (α<0.05). RESULTS The median number of cycles to failure was 352 ± 202 and 760 ± 644 for the bleach and control groups, respectively. The survival distributions for the two groups were significantly different (p=0.020). Dentin fatigue resistance was significantly lower in the bleach group compared to the control. CONCLUSIONS Direct bleaching of human dentin using an at-home tray bleaching protocol in situ reduced dentin fatigue resistance. This has implications for tooth fracture risk and longevity.
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Affiliation(s)
- J M Fitzgerald
- *Jacob M Fitzgerald, DDS, MSc, University of Toronto Faculty of Dentistry, Toronto, Ontario, Canada
| | - G De Souza
- Grace De Souza DDS, MSc, PhD, FADM, University of Louisville, Louisville, KY, USA
| | - L Tam
- Laura Tam, DDS, MSc, University of Toronto, Toronto, Ontario, Canada
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Gradinaru I, Vasiliu AL, Bargan A, Checherita LE, Ciubotaru BI, Armencia AO, Istrate B, Dascalu CG, Antohe ME. The Influence of Beverages on Resin Composites: An In Vitro Study. Biomedicines 2023; 11:2571. [PMID: 37761013 PMCID: PMC10526112 DOI: 10.3390/biomedicines11092571] [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: 07/29/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
Dental composites, through their structural diversity, represent the biomaterials frequently used in dental reconstructive therapy. The aim of our study was to observe the influence of different beverage environment conditions on seven types of obturation dental materials with different compositions. Our research focused on the surface modification analysis of the materials after the immersion in the different beverages; in this regard, we used the EDAX technique correlated with the energy-dispersive X-ray fluorescence (XRF). The pH of the drinks and that of the simulated saliva solution were determined by the titrimetric method, a sodium hydroxide solution 0.1 mol/dm3 was prepared and used for the titration. An amount of 5 mL of each analyzed solution was added to 15 mL of distilled water to obtain a dilution, to which 3 drops of phenolphthalein (as a color indicator-Phenolphthalein, 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone, C20H14O4 Mw: 318.32, purchased from Merck) were added for each analysis. For each solution, the experiment was repeated three times in order to obtain accurate results. The results of our study materialized into a real plea for modifying the patients' behavior in terms of diet and preferences for acidic drinks, so that their quality-of-life valence can be improved by keeping the composite materials in a long-term unalterable state on the one hand; on the other hand, systemic damage can be prevented as well.
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Affiliation(s)
- Irina Gradinaru
- 3rd Dental Medicine Department, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (I.G.); (M.E.A.)
| | - Ana Lavinia Vasiliu
- Department of Functional Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica-Vodă, 41A, 700487 Iasi, Romania; (A.L.V.); (A.B.)
| | - Alexandra Bargan
- Department of Functional Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica-Vodă, 41A, 700487 Iasi, Romania; (A.L.V.); (A.B.)
| | - Laura Elisabeta Checherita
- 2nd Dental Medicine Department, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania;
| | - Bianca-Iulia Ciubotaru
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica-Vodă, 41A, 700487 Iasi, Romania;
| | - Adina Oana Armencia
- 1st Dental Medicine Department, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universității Street, 700115 Iasi, Romania
| | - Bogdan Istrate
- Department of Mechanical, Mechatronic and Robotic Engineering, The Faculty of Mechanics, “Gheorghe Asachi” Technical University, Bulevardul Profesor Dimitrie Mangeron 67, 700050 Iasi, Romania;
| | - Cristina Gena Dascalu
- Department of Medical Informatics, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universității Street, 700115 Iasi, Romania
| | - Magda Ecaterina Antohe
- 3rd Dental Medicine Department, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (I.G.); (M.E.A.)
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Tărăboanță I, Buhățel D, Nica I, Stoleriu S, Ghiorghe AC, Pancu G, Tărăboanță-Gamen AC, Andrian S. The Impact of Simulated Gastric Acid and Toothbrushing on Surface Characteristics of Resin-Modified Glass-Ionomer Cements. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:medicina58091149. [PMID: 36143826 PMCID: PMC9505092 DOI: 10.3390/medicina58091149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022]
Abstract
Background and Objectives: The aim of this in vitro study was to evaluate the effect of simulated gastric acid associated with toothbrushing on the surface condition of three resin-modified glass-ionomer cements (RMGIC). Materials and Methods: One hundred and sixty samples of each material were obtained and included in three study groups according to the tested material: Group I (Ionolux, VOCO GmbH, Cuxhaven, Germany); Group II (Vitremer, 3 M-ESPE, St. Paul, MN, USA); and Group III (Fuji II LC, GC Corporation, Tokyo, Japan). The samples were submersed in hydrochloric acid 0.01 M (pH 3.8) for 3 h and exposed to a toothbrushing procedure at a frequency of 10,000 cycles with medium and hard bristles immediately or 30 min after the acid attack. Profilometric measurements were performed by using a non-contact profilometer (Dektak XT, Bruker, Billerica, MA, USA) in order to assess the surface roughness. ANOVA and Bonferroni post hoc tests were used for the statistical analysis at a significance level of p < 0.05. Results: Exposure of RMGICs to the erosive effect of hydrochloric acid in association with toothbrushing 30 min after the chemical attack increased the surface roughness of all three RMGICs. Exposure of the three tested materials exclusively to the action of hydrochloric acid did not affect the surface roughness. Conclusions: One year of hydrochloric acid challenge associated with one year of toothbrushing with medium-hardness bristles performed 30 min after the acid attack increase the surface roughness of two of the three types of RMGIC tested (Ionolux and Fuji II LC).
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Affiliation(s)
- Ionuț Tărăboanță
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Dan Buhățel
- Faculty of Dental Medicine, Iuliu Hațieganu University of Medicine and Pharmacy, 400349 Cluj-Napoca, Romania
- Correspondence: (D.B.); (I.N.); Tel.: +40-745-390-915 (D.B.); +40-744-920-611 (I.N.)
| | - Irina Nica
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
- Correspondence: (D.B.); (I.N.); Tel.: +40-745-390-915 (D.B.); +40-744-920-611 (I.N.)
| | - Simona Stoleriu
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Angela Cristina Ghiorghe
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Galina Pancu
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
| | | | - Sorin Andrian
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
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Şeyma A, Batu Ş. In vitro comparison of the erosive potential of four different wines on human dental enamel. BALKAN JOURNAL OF DENTAL MEDICINE 2022. [DOI: 10.5937/bjdm2201041q] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Background/Aim: This study aimed to investigate the erosive potential of wines derived from Anatolia on human teeth in vitro. Material and Methods: In this study two red (Öküzgözü, Boğazkere) and two white (Sultaniye, Narince) wines, citric acid and distilled water were used to investigate erosive effects. The pH, titratable acidity, iron and calcium ion levels of the groups were measured. Each group included 10 specimen and they were exposed to 25 ml of wine sample for 5 seconds, artificial saliva for 10 seconds for 10 times. The initial and the final phosphate concentrations were measured by the UV spectrophotometer and the difference between the measurements was calculated. One sample was examined under a scanning electron microscope and the data were analyzed statistically using One-way ANOVA and Pearson correlation test. Results: Mineral loss and erosive lesion depth values were ranged from highest to the lowest Sultaniye, Boğazkere, Öküzgözü and Narince, respectively. Correlation between mineral loss and pH was statistically significant (p<0.01). However, there was no correlation between the iron and calcium ion level and mineral loss. Conclusions: All the investigated wines have pH values below the critical value for enamel dissolution while Sultaniye was significantly more erosive than the others. There is a negative correlation between pH and erosive potential of the wine. Within the limits of this in vitro study, it can be expected that a regular consumption of wines might cause dental erosion.
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Ribeiro MES, Lopes RM, Aranha ACC, Medeiros IS, Lima RR, Souza Júnior MHSE, Loretto SC. Is prolonged bleaching more harmful to dental enamel than daily dietary and hygienic oral habits? Braz Oral Res 2021; 35:e113. [PMID: 34816901 DOI: 10.1590/1807-3107bor-2021.vol35.0113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/24/2021] [Indexed: 11/21/2022] Open
Abstract
The ultrastructural and mechanical properties of enamel surface were evaluated after prolonged bleaching treatments with 10% carbamide peroxide in the presence or absence of orange juice (erosive challenge) and toothbrushing (abrasive challenge). In total, 145 incisor bovine teeth were used in this study. Twenty-five samples were prepared for the ultrastructural evaluations, and 120 samples were prepared for microhardness and roughness tests. These 120 samples were divided into eight experimental groups (n = 15): G1- artificial saliva; G2- abrasion; G3- erosion; G4- dental bleaching; G5- erosion + abrasion; G6- bleaching + abrasion; G7- bleaching + erosion; and G8- bleaching + erosion + abrasion. All groups were tested at T0 (before treatment), T1 (14 days), T2 (21 days), and T3 (28 days). Two-way analysis of variance for repeated measures and the post hoc Sidak tests (p ≤ 0.05) were used. The roughness evaluation demonstrated an increase in damage for all experimental groups with an increase in the time period. For microhardness, the groups exposed to artificial saliva (AS) and abrasive challenge did not show any differences at any time points, while the other groups showed a decrease in microhardness from T0 to T3. Ultrastructural evaluation showed different surface alterations in response to the treatments. Despite prolonged bleaching periods, the procedure caused lesser enamel surface alterations than exposure to orange juice alone or in combination with brushing.
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Affiliation(s)
- Mara Eliane Soares Ribeiro
- Universidade Federal do Pará - UFPA, School of Dentistry, Dental Materials Laboratory, Belém - PA, Brazil
| | - Raquel Marianna Lopes
- Universidade de São Paulo - USP, School of Dentistry, Department of Restorative Dentistry, São Paulo, SP, Brazil
| | - Ana Cecília Corrêa Aranha
- Universidade de São Paulo - USP, School of Dentistry, Department of Restorative Dentistry, São Paulo, SP, Brazil
| | - Igor Studart Medeiros
- Universidade de São Paulo, School of Dentistry, Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil
| | - Rafael Rodrigues Lima
- Universidade Federal do Pará - UFPA, Institute of Biological Sciences, Laboratory of Functional and Structural Biology, Belém - PA, Brazil
| | | | - Sandro Cordeiro Loretto
- Universidade Federal do Pará - UFPA, School of Dentistry, Dental Materials Laboratory, Belém - PA, Brazil
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Hajhamid B, De Souza GM. Irradiation therapy and chewing simulation: effect on zirconia and human enamel. J Prosthodont Res 2020; 65:249-254. [PMID: 33041279 DOI: 10.2186/jpr.jpr_d_20_00018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE Ionizing radiation therapy (RT) is the main option for head and neck cancer treatment, but it is associated with multiple side effects. This study aimed to evaluate the effect of RT associated with chewing simulation on the surface of human enamel and Yttria-partially stabilized zirconia (Y-TZP). METHODS Maxillary premolar cusps and Y-TZP slabs were divided in 7 experimental groups: CO: no RT (control); EZ groups had irradiation applied to both, enamel and zirconia samples (simulating restoration prior to RT); E groups had irradiation applied to enamel only (simulating restoration after RT). RT doses were either 30, 50 or 70 Gray (Gy). Enamel cusps were abraded against zirconia slabs in a chewing simulator (CS - one million cycles/ 80 N/ 60 mm/min, 2 mm horizontal path, artificial saliva, 37˚ C). Zirconia hardness was evaluated before CS; zirconia roughness and enamel volume (wear) were evaluated before and after CS. Hardness and wear data were analyzed by one-way Analysis of Variance and Tukey post hoc test. Roughness was analyzed by Repeated Measures test and Bonferroni test (p=0.05). RESULTS There was no significant effect of enamel or zirconia irradiation on enamel cusp wear (p=0.226), regardless of the irradiation dose used - up to 70 Gy. Irradiation also did not affect Y-TZP surface roughness (p=0.127) and hardness (p=0.964). CONCLUSIONS RT does not promote significant changes to the surface characteristics of zirconia. Irradiated enamel abraded against zirconia does not show higher wear volume when compared to non-irradiated enamel.
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Hajhamid B, Mohammad Rahimi R, F Bahr D, M De Souza G. Effect of ionizing radiation and chewing simulation on human enamel and zirconia. J Prosthodont Res 2020; 65:67-72. [PMID: 32938881 DOI: 10.2186/jpr.jpor_2019_592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To evaluate the effect of ionizing irradiation on human enamel and zirconia after chewing simulation. METHODS Twenty enamel and twenty translucent Yttria-stabilized zirconia (Y-PSZ) specimens were divided in 4 groups: Co (control) - no irradiation on enamel cusps/opposing zirconia slabs; E70 - irradiated (70 Gray) enamel cusps/opposing irradiated enamel slabs; Z70 - irradiated zirconia cusps/opposing irradiated zirconia slabs; EZ70 - irradiated enamel cusps/opposing irradiated zirconia slabs. Cusps were abraded against slabs in a chewing simulator (CS - one million cycles, 80 N, artificial saliva, 37˚C). Wear and roughness of zirconia and enamel were analyzed using a stylus profilometer. The abraded enamel was analyzed by Electron probe micro-analyzer (EPMA) and zirconia was characterized by nanoindentation and X-ray diffraction. One-way analysis of variance (ANOVA) and Tukey test were used for analysis of wear, Repeated Measures and Bonferroni test for roughness, and hardness and modulus values were compared using Wilcoxan Mann Whitney rank sum test (overall 5% significance). RESULTS Significantly higher volume loss was presented by cusps in the E70 group (p<0.001). Wear was similar between Co and EZ70 groups. There was no significant effect of irradiation on roughness of enamel or zirconia slabs (p=0.072). Irradiated Y-PSZ slabs had significantly higher hardness and modulus than non-irradiated ones and a 7% increase in m phase content was detected after irradiation. CONCLUSIONS The opposing surface characteristics played a more significant role on enamel wear than did ionizing radiation. However, radiation affects Y-PSZ crystalline composition, hardness and modulus of elasticity.
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Affiliation(s)
- Beshr Hajhamid
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, ON M5G1G6
| | - Raheleh Mohammad Rahimi
- School of Materials Engineering, Purdue University, 701West Stadium Avenue, West Lafayette, IN 47907-2045
| | - David F Bahr
- School of Materials Engineering, Purdue University, 701West Stadium Avenue, West Lafayette, IN 47907-2045
| | - Grace M De Souza
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, ON M5G1G6
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Mechanical properties of aged yttria-stabilized tetragonal zirconia polycrystal after abrasion with different aluminum oxide particles. J Prosthet Dent 2020; 124:599-604. [PMID: 31918896 DOI: 10.1016/j.prosdent.2019.10.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 10/29/2019] [Accepted: 10/30/2019] [Indexed: 11/21/2022]
Abstract
STATEMENT OF PROBLEM A consensus on the benefits of airborne-particle abrasion of zirconia with alumina particles of different sizes is still lacking. Larger particle size may improve micromechanical retention but may generate deep microcracks on the zirconia surface. PURPOSE The purpose of this in vitro study was to evaluate the effect of different size of Al2O3 particles used for surface abrasion on the mechanical properties of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP). MATERIAL AND METHODS Sixty Y-TZP specimens were divided into 6 groups according to the treatment: control (without treatment) or airborne-particle abrasion with Al2O3 particles (45 μm or 150 μm). Half the specimens were stored for 24 hours in water while the other half was exposed to 1.5×106 mechanical cycles before flexural strength analysis at 1 mm/min crosshead speed. Specimens were also characterized by micro-Raman spectroscopy and X-ray diffraction (XRD) to evaluate the crystalline composition. The data were subjected to 2-way ANOVA and Tukey HSD test (α=.05). RESULTS Airborne-particle abrasion with alumina (P=.030) and mechanical fatigue (P<.001) had a significant effect on flexural strength. Specimens abraded with 45-μm Al2O3 particles (847 ±204 MPa) presented higher flexural strength than those of the control group (670 ±210 MPa). The size of the alumina particles was not significant for flexural strength. Flexural resistance (664 MPa) significantly decreased after mechanical fatigue. All groups showed only the tetragonal phase on the micro-Raman spectra, which was confirmed by XRD. CONCLUSIONS Airborne-particle abrasion with smaller Al2O3 particles increased the flexural strength on Y-TZP without causing phase transformation. However, flexural strength was decreased after mechanical fatigue.
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Meira IA, Fernandes NLS, Lavôr JRD, Sampaio FC, Oliveira AFBD. Investigation of the Erosive Potential of Different Types of Alcoholic Beverages. PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLÍNICA INTEGRADA 2020. [DOI: 10.1590/pboci.2020.050] [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
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Pinelli MDM, Catelan A, de Resende LFM, Soares LES, Aguiar FHB, Liporoni PCS. Chemical composition and roughness of enamel and composite after bleaching, acidic beverages and toothbrushing. J Clin Exp Dent 2019; 11:e1175-e1180. [PMID: 31824600 PMCID: PMC6894915 DOI: 10.4317/jced.56442] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 11/04/2019] [Indexed: 11/17/2022] Open
Abstract
Background In this study was assessed the surface roughness and chemical composition of tooth enamel and composite resin after bleaching treatment, immersion in acidic beverages, and simulated toothbrushing. Material and Methods One hundred and twenty dental blocks (10 x 10 x 3 mm) were randomly assigned (n = 10) according to surface treatment [none (N), bleaching (B), toothbrushing (T), and B+T] and storage medium [saliva (S), whiskey (W), and orange juice (O)]: experimental groups - N+S, N+W, N+O, B+S, B+W, B+O, S+T, W+T, O+T, B+S+T, B+W+T, and B+O+T. Two bleaching sessions were conducted using 38% hydrogen peroxide (3 applications). Surface roughness was measured using a roughness tester and composition was determined by micro energy-dispersive X-ray fluorescence spectrometry (µ-EDXRF) before and after treatments. Calcium/phosphorus (Ca/P) ratio in enamel and silica (Si) content in composite were evaluated. Data were statistically analyzed by ANOVA and Tukey’s test (α = 0.05). Results Overall, increased values of surface roughness for enamel and composite were observed mainly after immersion in orange juice and bleaching/toothbrushing association. Moreover, this association and immersion in whiskey resulted in lower Ca/P ratio and after aging methods, bleached and bleached/toothbrushed groups showed decreased in Ca/P ratio compared to initial values. All groups showed Si content decrease at the end, except the group without surface treatment and immersed in saliva, and bleaching followed by immersion in orange juice and toothbrushing caused the highest Si reduction. Conclusions Bleaching and toothbrushing combination strengthened the effects caused by acidic drinks on roughness and chemical composition of enamel and composite. Key words:Tooth bleaching, toothbrushing, physical properties, chemical properties.
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Affiliation(s)
| | - Anderson Catelan
- Assistant Professor, Department of Dentistry, University of Taubaté, Taubaté, SP, Brazil.,Assistant Professor, Graduate Program in Dentistry, Faculty of Health Sciences, University of Western São Paulo, Presidente Prudente, SP, Brazil
| | | | - Luís-Eduardo-Silva Soares
- Assistant Professor, Laboratory of Dentistry and Applied Materials (LDAM), Research and Development Institute (IP&D), University of Vale do Paraíba, São José dos Campos, SP, Brazil
| | - Flávio-Henrique-Baggio Aguiar
- Associate Professor, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
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Alfrisany NM, Shokati B, Tam LE, De Souza GM. Simulated occlusal adjustments and their effects on zirconia and antagonist artificial enamel. J Adv Prosthodont 2019; 11:162-168. [PMID: 31297175 PMCID: PMC6609759 DOI: 10.4047/jap.2019.11.3.162] [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: 09/05/2018] [Revised: 03/26/2019] [Accepted: 06/11/2019] [Indexed: 11/29/2022] Open
Abstract
PURPOSE The aim of this study was to evaluate the effect of occlusal adjustments on the surface roughness of yttria-tetragonal zirconia polycrystal (Y-TZP) and wear of opposing artificial enamel. MATERIALS AND METHODS Twenty-five Y-TZP slabs from each brand (Lava, 3M and Bruxzir, Glidewell Laboratories) with different surface conditions (Control polished - CPZ; Polished/ground - GRZ; Polished/ground/repolished - RPZ; Glazed - GZ; Porcelain-veneered - PVZ; n=5) were abraded (500,000 cycles, 80 N) against artificial enamel (6 mm diameter steatite). Y-TZP roughness (in µm) before and after chewing simulation (CS) and antagonist steatite volume loss (in mm3) were evaluated using a contact surface profilometer. Y-TZP roughness was analyzed by three-way analysis of variance (ANOVA) and teatite wear by two-way ANOVA and Tukey Honest Difference (HSD) (P=.05). RESULTS There was no effect of Y-TZP brand on surface roughness (P=.216) and steatite loss (P=.064). A significant interaction effect (P<.001) between surface condition and CS on Y-TZP roughness was observed. GZ specimens showed higher roughness after CS (before CS − 3.7 ± 1.8 µm; after CS − 13.54 ± 3.11 µm), with partial removal of the glaze layer. Indenters abraded against CPZ (0.09 ± 0.03 mm3) were worn more than those abraded against PVZ (0.02 ± 0.01 mm3) and GZ (0.02 ± 0.01 mm3). Higher wear caused by direct abrasion against zirconia was confirmed by SEM. CONCLUSION Polishing with an intraoral polishing system did not reduce the roughness of zirconia. Wear of the opposing artificial enamel was affected by the material on the surface rather than the finishing technique applied, indicating that polished zirconia is more deleterious to artificial enamel than are glazed and porcelain-veneered restorations.
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Affiliation(s)
- Najm Mohsen Alfrisany
- Department of Dental Health, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.,Faculty of Dentistry, University of Toronto, Toronto, Canada
| | - Babak Shokati
- Faculty of Dentistry, University of Toronto, Toronto, Canada
| | - Laura Eva Tam
- Faculty of Dentistry, University of Toronto, Toronto, Canada
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Effect of tooth whitening strips on fatigue resistance and flexural strength of bovine dentin in vitro. PLoS One 2017; 12:e0173480. [PMID: 28278191 PMCID: PMC5344512 DOI: 10.1371/journal.pone.0173480] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 02/21/2017] [Indexed: 11/23/2022] Open
Abstract
Objective To determine the effects of whitening strips on bovine dentin fatigue resistance and flexural strength in vitro. Materials and methods A total of eighty bovine dentin specimens (2x2x17mm) were treated with either: control glycerine gel on plastic film wrap or whitening strips containing 9.5% hydrogen peroxide. Treatment was applied for 30 minutes, twice a day, for 1- or 4-weeks. After the last treatment, ten specimens per group were randomly selected to undergo fatigue testing (106 cycles, 3Hz, 20N) while the other ten were subjected to flexural strength testing after ten days of storage in artificial saliva. Kaplan-Meier method with a log rank test, Wilcoxon test and Cox regression were used to assess fatigue test results (p<0.05). One-way ANOVA and Tukey’s tests were used to compare the flexural strength results (p<0.05). Results There were significant differences in survival during the fatigue test among the groups (p<0.001). Treatment (control or bleach) was a significant factor for specimen survival (p<0.001, Exp(B) = 33.45). There were significant differences in mean flexural strength (p<0.001). No significant difference was found between “1-wk control” and “4-wk control”. The mean flexural strength and fatigue resistance of the “4-wk bleach” were significantly lower than all the other groups. Conclusions The use of whitening strips reduced the fatigue resistance and flexural strength of bovine dentin in vitro. Until the effect of whitening strips on mechanical properties of human dentin is fully elucidated, it remains prudent to advise patients to avoid excessive direct use of whitening strips on dentin.
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Yoshizaki KT, Francisconi-dos-Rios LF, Sobral MAP, Aranha ACC, Mendes FM, Scaramucci T. Clinical features and factors associated with non-carious cervical lesions and dentin hypersensitivity. J Oral Rehabil 2017; 44:112-118. [DOI: 10.1111/joor.12469] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/06/2016] [Indexed: 11/26/2022]
Affiliation(s)
- K. T. Yoshizaki
- Department of Restorative Dentistry; School of Dentistry; University of São Paulo; São Paulo Brazil
| | | | - M. A. P. Sobral
- Department of Restorative Dentistry; School of Dentistry; University of São Paulo; São Paulo Brazil
| | - A. C. C. Aranha
- Department of Restorative Dentistry; School of Dentistry; University of São Paulo; São Paulo Brazil
| | - F. M. Mendes
- Department of Pediatric Dentistry; School of Dentistry; University of São Paulo; São Paulo Brazil
| | - T. Scaramucci
- Department of Restorative Dentistry; School of Dentistry; University of São Paulo; São Paulo Brazil
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Pinto PA, Colas G, Filleter T, De Souza GM. Surface and Mechanical Characterization of Dental Yttria-Stabilized Tetragonal Zirconia Polycrystals (3Y-TZP) After Different Aging Processes. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2016; 22:1179-1188. [PMID: 27780486 DOI: 10.1017/s1431927616011843] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP) is a ceramic material used in indirect dental restorations. However, phase transformation at body temperature may compromise the material's mechanical properties, affecting the clinical performance of the restoration. The effect of mastication on 3Y-TZP aging has not been investigated. 3Y-TZP specimens (IPS E-max ZirCAD and Z5) were aged in three different modes (n=13): no aging (control), hydrothermal aging (HA), or chewing simulation (CS). Mechanical properties and surface topography were analyzed. Analysis of variance showed that neither aging protocol (p=0.692) nor material (p=0.283) or the interaction between them (p=0.216) had a significant effect on flexural strength, values ranged from 928.8 MPa (IPSHA) to 1,080.6 MPa (Z5HA). Nanoindentation analysis showed that material, aging protocol, and the interaction between them had a significant effect (p<0.001) on surface hardness and reduced Young's modulus. The compositional analysis revealed similar yttrium content for all the experimental conditions (aging: p=0.997; material: p=0.248; interaction material×aging: p=0.720). Atomic force microscopy showed an effect of aging protocols on phase transformation, with samples submitted to CS exhibiting features compatible with maximized phase transformation, such as increased volume of the material microstructure at the surface leading to an increase in surface roughness.
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Affiliation(s)
- Palena A Pinto
- 1Faculty of Dentistry,University of Toronto,Edward Street #352E,Toronto,ON,Canada,M5G 1G6
| | - Guillaume Colas
- 2Department of Mechanical and Industrial Engineering,University of Toronto,5 King's College Road #MB115,Toronto,ON,Canada,M5S 3G8
| | - Tobin Filleter
- 2Department of Mechanical and Industrial Engineering,University of Toronto,5 King's College Road #MB115,Toronto,ON,Canada,M5S 3G8
| | - Grace M De Souza
- 1Faculty of Dentistry,University of Toronto,Edward Street #352E,Toronto,ON,Canada,M5G 1G6
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DA SILVA MAB, VITTI RP, SINHORETI MAC, CONSANI RLX, SILVA-JÚNIOR JGD, TONHOLO J. Effect of alcoholic beverages on surface roughness and microhardness of dental composites. Dent Mater J 2016; 35:621-6. [DOI: 10.4012/dmj.2015-383] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Rafael Pino VITTI
- Department of Prosthodontics, School of Dentistry, University of Taubaté
| | | | | | | | - Josealdo TONHOLO
- Institute of Chemistry and Biotechnology, School of Chemistry, Alagoas Federal University
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Fracture Strength of Aged Monolithic and Bilayer Zirconia-Based Crowns. BIOMED RESEARCH INTERNATIONAL 2015; 2015:418641. [PMID: 26576423 PMCID: PMC4631855 DOI: 10.1155/2015/418641] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 01/19/2015] [Indexed: 11/18/2022]
Abstract
The purpose of this study was to evaluate the effect of design and surface finishing on fracture strength of yttria-tetragonal zirconia polycrystal (Y-TZP) crowns in monolithic (1.5 mm thickness) and bilayer (0.8 mm zirconia coping and 0.7 mm porcelain veneer) configuration after artificial aging. Bovine incisors received crown preparation and Y-TZP crowns were manufactured using CAD/CAM technique, according to the following groups (n = 10): Polished monolithic zirconia crowns (PM); Glazed monolithic zirconia crowns (GM); Bi-layer crowns (BL). Crowns were cemented with resin cement, submitted to artificial aging in a chewing simulator (2.5 million cycles/80 N/artificial saliva/37°C), and tested for fracture strength. Two remaining crowns referring to PM and GM groups were submitted to a chemical composition analysis to measure the level of yttrium after aging. One-way ANOVA and Tukey's test (P = .05) indicated that monolithic zirconia crowns presented similar fracture strength (PM = 3476.2 N ± 791.7; GM = 3561.5 N ± 991.6), which was higher than bilayer crowns (2060.4 N ± 810.6). There was no difference in the yttrium content among the three surfaces evaluated in the monolithic crowns. Thus, monolithic zirconia crowns present higher fracture strength than bilayer veneered zirconia after artificial aging and surface finishing does not affect their fracture strength.
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Tam LE, Cho W, Wang BY, De Souza G. Effect of Bleaching Treatment on Fatigue Resistance and Flexural Strength of Bovine Dentin. J ESTHET RESTOR DENT 2015; 27:374-82. [DOI: 10.1111/jerd.12157] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Laura E. Tam
- Restorative Dentistry; Department of Clinical Sciences; Faculty of Dentistry; University of Toronto; Toronto Canada
| | - Woohyun Cho
- Restorative Dentistry; Department of Clinical Sciences; Faculty of Dentistry; University of Toronto; Toronto Canada
| | - Bridget Y. Wang
- Restorative Dentistry; Department of Clinical Sciences; Faculty of Dentistry; University of Toronto; Toronto Canada
| | - Grace De Souza
- Restorative Dentistry; Department of Clinical Sciences; Faculty of Dentistry; University of Toronto; Toronto Canada
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Chew H, Zakian C, Pretty I, Ellwood R. Measuring Initial Enamel Erosion with Quantitative Light-Induced Fluorescence and Optical Coherence Tomography: An in vitro Validation Study. Caries Res 2014; 48:254-62. [DOI: 10.1159/000354411] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 07/01/2013] [Indexed: 11/19/2022] Open
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Caneppele TMF, Jeronymo RDI, Di Nicoló R, de Araújo MAM, Soares LES. In Vitro assessment of dentin erosion after immersion in acidic beverages: surface profile analysis and energy-dispersive X-ray fluorescence spectrometry study. Braz Dent J 2013. [PMID: 23207852 DOI: 10.1590/s0103-64402012000400011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to investigate the effects of some acidic drinks on dentin erosion, using methods of surface profile (SP) analysis and energy-dispersive X-ray fluorescence spectrometry (EDXRF). One hundred standardized dentin slabs obtained from bovine incisor roots were used. Dentin slabs measuring 5x5 mm were ground flat, polished and half of each specimen surface was protected with nail polish. For 60 min, the dentin surfaces were immersed in 50 mL of 5 different drinks (Gatorade®, Del Valle Mais orange juice®, Coca-Cola®, Red Bull® and white wine), 20 blocks in each drink. The pH of each beverage was measured. After the erosive challenge, the nail polish was removed and SP was analyzed. The mineral concentration of dentin surfaces was determined by means of EDXRF. Data were analyzed statistically by ANOVA and Tukey's test (α=0.05). SP analysis showed that Red-Bull had the highest erosive potential (p<0.05). EDXRF results exhibited a decrease in phosphate in the groups immersed in Red-Bull, orange juice and white wine (p<0.05), and no significant difference in calcium content between the reference surface and eroded surface. In conclusion, this study demonstrated that all studied beverages promoted erosion on root dentin and Red Bull had the highest erosive potential. There was no correlation between pH of beverages and their erosive potential and only the P content changed after erosive challenge.
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Affiliation(s)
- Taciana Marco Ferraz Caneppele
- Department of Restorative Dentistry, São José dos Campos Dental School, Univ Estadual Paulista, São José dos Campos, SP, Brazil
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Knösel M, Forslund L, Jung K, Ziebolz D. Efficacy of different strategies in protecting enamel against demineralization during fixed orthodontic treatment. J Orofac Orthop 2012; 73:194-203. [PMID: 22576861 DOI: 10.1007/s00056-012-0072-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 01/10/2012] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVE Sealant application is a common strategy for preventing enamel demineralization during multibracket treatment. The aim of this study was to assess the efficacy in enamel demineralization prevention of two fluoride-containing enamel varnishes compared to a non-fluoride varnish, weekly fluoride gel application, and a non-treated control group. MATERIALS AND METHODS Enamel specimens obtained from 75 human upper permanent incisors were randomly allocated to five trial groups (each n = 15): A), ProSeal (Reliance), B), Maximum Cure® (Reliance), C), CervitecPlus (Ivoclar Vivadent, Schaan, Liechtenstein), D) elmex® gelée (GABA, Lörrach, Germany), and E), a non-treated control group. Groups A-C received a baseline varnish application, whereas group D specimens received a once weekly gel application for 2 min. Six demineralization cycles per day were carried out for 5 min each using 0.05 M citric acid, with the specimens stored in remineralization solution between cycles. Lesion depth expressed in percentage fluorescence loss (Δ-F in %) compared to baseline (T0) was assessed quantitatively with light-induced fluorescence (QLF) after 3 (T1), 7 (T2), 14 (T3), and 30 (T4) days globally and for each time point, and analyzed for compounds using the Kruskal-Wallis test (α = 5%), and additional one-sample Wilcoxon tests for each time/compound combination (Bonferroni-corrected α-levels α* = 0.05/4 = 0.0125). RESULTS Significant fluorescence loss revealing greater lesion depth was detected in the untreated controls (E) at T3, and in groups A (ProSeal) and C (CervitecPlus) at T4. No significant Δ-F changes were seen in the specimens from groups B (Maximum Cure®) and D (elmex® gelée). CONCLUSION Maximum Cure® sealant seems to offer efficient protection against demineralization during fixed orthodontic treatment, as does weekly application of elmex® fluoride gel.
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Scaramucci T, Hara AT, Zero DT, Ferreira SS, Aoki IV, Sobral MAP. In vitro evaluation of the erosive potential of orange juice modified by food additives in enamel and dentine. J Dent 2011; 39:841-8. [DOI: 10.1016/j.jdent.2011.09.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 09/08/2011] [Accepted: 09/09/2011] [Indexed: 10/17/2022] Open
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Soares LES, Lima LR, Vieira LDS, Santo AMDE, Martin AA. Erosion effects on chemical composition and morphology of dental materials and root dentin. Microsc Res Tech 2011; 75:703-10. [DOI: 10.1002/jemt.21115] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 09/12/2011] [Indexed: 11/06/2022]
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Briso ALF, Caruzo LP, Guedes APA, Catelan A, Santos PHD. In Vitro Evaluation of Surface Roughness and Microhardness of Restorative Materials Submitted to Erosive Challenges. Oper Dent 2011; 36:397-402. [DOI: 10.2341/10-356-l] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
The effects of dental erosion caused by acidic solutions on the surface of restorative dental materials could be minimized by the application of a surface sealant.
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Hamba H, Nikaido T, Inoue G, Sadr A, Tagami J. Effects of CPP-ACP with sodium fluoride on inhibition of bovine enamel demineralization: A quantitative assessment using micro-computed tomography. J Dent 2011; 39:405-13. [DOI: 10.1016/j.jdent.2011.03.005] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Revised: 02/21/2011] [Accepted: 03/18/2011] [Indexed: 11/25/2022] Open
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Schlueter N, Hara A, Shellis R, Ganss C. Methods for the Measurement and Characterization of Erosion in Enamel and Dentine. Caries Res 2011; 45 Suppl 1:13-23. [DOI: 10.1159/000326819] [Citation(s) in RCA: 123] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Karlsson L. Caries Detection Methods Based on Changes in Optical Properties between Healthy and Carious Tissue. Int J Dent 2010; 2010:270729. [PMID: 20454579 PMCID: PMC2864452 DOI: 10.1155/2010/270729] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2009] [Accepted: 02/04/2010] [Indexed: 11/21/2022] Open
Abstract
A conservative, noninvasive or minimally invasive approach to clinical management of dental caries requires diagnostic techniques capable of detecting and quantifying lesions at an early stage, when progression can be arrested or reversed. Objective evidence of initiation of the disease can be detected in the form of distinct changes in the optical properties of the affected tooth structure. Caries detection methods based on changes in a specific optical property are collectively referred to as optically based methods. This paper presents a simple overview of the feasibility of three such technologies for quantitative or semiquantitative assessment of caries lesions. Two of the techniques are well-established: quantitative light-induced fluorescence, which is used primarily in caries research, and laser-induced fluorescence, a commercially available method used in clinical dental practice. The third technique, based on near-infrared transillumination of dental enamel is in the developmental stages.
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Affiliation(s)
- Lena Karlsson
- Division of Cariology, Department of Dental Medicine, Karolinska Institutet, Box 4064, 141 04 Huddinge, Sweden
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Quantifying and qualifying surface changes on dental hard tissues in vitro. J Dent 2010; 38:182-90. [DOI: 10.1016/j.jdent.2010.01.002] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Revised: 12/11/2009] [Accepted: 01/06/2010] [Indexed: 11/23/2022] Open
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