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Shishehian A, Firouz F, Khazaee S, Rajabi H, Farhadian M, Niaghiha F. Evaluating the color stability of 3D-printed resins against various solutions. Eur J Transl Myol 2023; 33:11493. [PMID: 37767891 PMCID: PMC10583149 DOI: 10.4081/ejtm.2023.11493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 06/15/2023] [Indexed: 09/29/2023] Open
Abstract
The purpose of this study was to investigate the effect of different solutions on the optical behavior of two types of 3D-printed resin (Detax and Asiga). The samples were randomly divided into 4 groups of cola, orange juice, tea and artificial saliva (control group) in the form of 14 x 10 mm blocks with a thickness of 1.5 ± 0.3 mm (10 samples in each group). By spectrophotometric device, the color of the examined samples was recorded in the CIE system and in three parameters *L (brightness), a* (red-green) and b* (blue-yellow) as the initial record. The color difference of the samples was recorded on 7 and 30 days after immersion as a secondary record. After that, using the formula, the color difference (ΔE) were calculated. T-test also was used to analyze the data. There was no significant difference between the amount of ΔE on 7th and 30th days after exposure to artificial saliva and cola and on 7th days after exposure to orange juice and tea. But on the 30th day, a significant difference was found in orange juice and tea drinks (p<0.05), so that the value of ΔE in Asiga printer was lower than Detax. ΔE changes in orange juice solution were more than other drinks. On the 30th day of immersion in tea drinks and orange juice, Asiga printer had significantly less color difference than Detax printer.
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Affiliation(s)
- Arash Shishehian
- Department of Prosthodontics, Dental Faculty, Hamadan University of Medical Sciences, Hamadan.
| | - Farnaz Firouz
- Department of Prosthodontics, Dental Faculty, Hamadan University of Medical Sciences, Hamadan.
| | - Sara Khazaee
- Department of Prosthodontics, Dental Faculty, Hamadan University of Medical Sciences, Hamadan.
| | - Hossein Rajabi
- Department of Prosthodontics, Dental Faculty, Hamadan University of Medical Sciences, Hamadan.
| | - Maryam Farhadian
- Department of Biostatistics, School of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan.
| | - Fatemeh Niaghiha
- Department of Prosthodontics, Dental Faculty, Hamadan University of Medical Sciences, Hamadan.
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Paolone G, Mazzitelli C, Boggio F, Breschi L, Vichi A, Gherlone E, Cantatore G. Effect of Different Artificial Staining Procedures on the Color Stability and Translucency of a Nano-Hybrid Resin-Based Composite. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2336. [PMID: 36984216 PMCID: PMC10058860 DOI: 10.3390/ma16062336] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/07/2023] [Accepted: 03/13/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND To evaluate the effect of different experimental staining procedures on color stability and translucency of a nano-hybrid resin-based composite (RBC). METHODS Forty-eight cylindrical-shaped specimens (10 × 2 mm) were prepared with a nano-hybrid RBC (Clearfil Majesty ES-2) and randomly divided in four groups according to the experimental staining procedure: G1) static immersion in a staining solution (coffee) (44 ± 1 °C); G2) staining cycling between coffee (44 ± 1°C) and distilled water (37 ± 1°C) with an experimental staining machine based on Arduino, an Open Source hardware development platform; G3) staining cycles as in G2 + brushing with a low abrasive toothpaste (Relative Dentin Abrasion RDA = 30) (Elmex Sensitive Professional); G4) staining cycles as in G3, with brushing performed with a very strong abrasive toothpaste (RDA = 90) (Lacult Active). Color parameters were recorded at the baseline (T0) after staining procedures (T1) and repolishing (T2) using a spectrophotometer. Color change (∆E00) and translucency (TP, CR) were evaluated. Data were statistically analyzed (p < 0.05). RESULTS For ∆E00 after staining, Group 1 showed the highest color change and Group 3 the lowest. All groups were significantly different (p < 0.001) except for Group 2 vs. Group 4; after repolishing, Group 1 was significantly higher than Group 3 (p < 0.001), Group 2 (p < 0.001), and Group 4 (p = 0.003); Group 2 was higher than Group 3 (p < 0.001). For TP variable, after staining procedures, Group 2 was significantly higher than all other groups (p < 0.001), and Group 1 was significantly higher than Group 3 (p < 0.001) and Group 4 (p = 0.007). After repolishing, Group 4 was significantly lower than Group 3 (p = 0.008) and Group 2 (p = 0.027). Repolishing procedure significantly reduced color parameters. CONCLUSIONS The investigated staining procedure induced significant differences in color stability and translucency. The use of a very strong abrasive toothpaste (RDA = 90) induced higher color change than a low abrasive one (RDA = 30). Repolishing procedures are able to partially reduce color change induced by artificial staining procedures.
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Affiliation(s)
- Gaetano Paolone
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, 20132 Milan, Italy
| | - Claudia Mazzitelli
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy
| | - Francesca Boggio
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, 20132 Milan, Italy
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy
| | - Alessandro Vichi
- Dental Academy, University of Portsmouth, William Beatty Building, Hampshire Terrace, Portsmouth PO1 2QG, UK
| | - Enrico Gherlone
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, 20132 Milan, Italy
| | - Giuseppe Cantatore
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, 20132 Milan, Italy
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Paolone G, Formiga S, De Palma F, Abbruzzese L, Chirico L, Scolavino S, Goracci C, Cantatore G, Vichi A. Color stability of resin-based composites: Staining procedures with liquids-A narrative review. J ESTHET RESTOR DENT 2022; 34:865-887. [PMID: 35396818 DOI: 10.1111/jerd.12912] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 01/30/2022] [Accepted: 03/24/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The objective of this study was to review the experimental staining procedures performed in in-vitro studies for evaluating color stability of resin-based composites used for direct restorations. OVERVIEW A review was performed with the purpose to identify in vitro procedures carried out to establish staining and color stability of resin-based composites used for direct restorations. A literature search was performed on four online databases (PubMed, Scopus, Embase and Web of Science) for articles published from January 1st 2001 till March 20th 2021, using a combination of free words and Medical Subject Headings (MESH) terms: "Composite Resins" AND "Color Stability" OR "Staining." Two reviewers screened titles and/or abstracts of 1728 unique studies. In total, 208 studies were selected for full-text reading, from which 178 were included in the review. The assessed variables were specimen dimensions, shape, and surface finishing; time before immersion; staining media type, dwell time, temperature and renewal interval; type of composite; color and translucency assessment parameters and measuring system. One hundred and seventy-eight articles analyzed color stability with staining liquids. Coffee was the most used staining medium (n = 102), followed by tea (n = 61), and red wine (n = 55). A disc-shaped specimen was used in most studies (n = 170) with a 2 mm thickness (n = 116). Spectrophotometers were the most used color assessment devices (n = 154), followed by colorimeters (n = 17). Color differences were quantified with ΔE (n = 154), ΔE00 (n = 23). Acceptability and or perceptibility thresholds were also taken into consideration (n = 126). CONCLUSIONS The large variety of staining procedure suggests the need for standardization. CLINICAL SIGNIFICANCE Aesthetic failure due to discoloration is a relevant clinical problem. Evaluating benefits and drawbacks of resin based composites artificial staining procedures will improve to predict materials clinical performances.
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Affiliation(s)
- Gaetano Paolone
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, Milan, Italy
| | - Sara Formiga
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, Milan, Italy
| | - Francesca De Palma
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, Milan, Italy
| | - Luca Abbruzzese
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, Milan, Italy
| | - Luca Chirico
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, Milan, Italy
| | | | - Cecilia Goracci
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Giuseppe Cantatore
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, Milan, Italy
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ŞİŞMANOĞLU S, GÜRCAN AT. Evaluation of Stain Susceptibility of Different CAD/CAM Blocks After Immersion in Coffee. DÜZCE ÜNIVERSITESI SAĞLIK BILIMLERI ENSTITÜSÜ DERGISI 2021. [DOI: 10.33631/duzcesbed.840660] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Miletic V, Stasic JN, Komlenic V, Petrovic R. Multifactorial analysis of optical properties, sorption, and solubility of sculptable universal composites for enamel layering upon staining in colored beverages. J ESTHET RESTOR DENT 2020; 33:943-952. [PMID: 33179862 DOI: 10.1111/jerd.12679] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 10/22/2020] [Accepted: 10/30/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To analyze the effects of factors 'composite,' 'medium,' and 'time' on color, translucency, and sorption/solubility of sculptable universal composites for enamel layering upon immersion in colored beverages. MATERIALS AND METHODS Disk-shaped specimens, 10 mm in diameter and 2 mm thick (n = 5/group), of ultrafine, hybrid composite Essentia (GC), microhybrid Gaenial Anterior (GC), nanofilled Filtek Ultimate Enamel and Body ( 3M ESPE) were immersed in red wine, coffee, or distilled water for 15 days. CIELab color coordinates were measured and CIEDE2000 (∆E00 ) and Translucency Parameter differences (∆TP00 ) were calculated. Sorption and solubility were determined according to ISO 4049:2009. Data were analyzed using the analyses of variance and Tukey's post-hoc test (α = 0.05). RESULTS Essentia and Gaenial exhibited the lowest and the highest staining-dependent color differences, with mean ∆E00 range of 1.7-6.1 and 5.1-11.3, respectively (p < 0.05). ∆TP00 was more pronounced in wine than in coffee (p < 0.05). Sorption and solubility varied between 9.8 and 15.3 μg/mm3 and -1.6 and -5.4 μg/mm3 , respectively, with positive correlation between ∆TP00 and sorption (p = 0.005). CONCLUSIONS Total color and translucency differences of sculptable composites for enamel layering were material-, time- and medium-dependent. Translucency differences positively correlated with sorption. Overall, the ultrafine, hybrid composite exhibited the best results in terms of color stability, sorption and solubility. CLINICAL SIGNIFICANCE Clinicians should be aware of differences in color stability of sculptable composites for enamel layering as these are directly exposed to discoloration in the oral environment and are directly related to patients' long-term satisfaction and restoration longevity. Ultrafine, hybrid composite may be preferred due to better color stability, lower sorption and solubility compared to nanofilled and microhybrid composites evaluated in this study.
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Affiliation(s)
- Vesna Miletic
- Department of Restorative Dentistry and Endodontics, University of Belgrade, School of Dental Medicine, DentalNet Research Group, Belgrade, Serbia
| | - Jovana N Stasic
- Department of Restorative Dentistry and Endodontics, University of Belgrade, School of Dental Medicine, DentalNet Research Group, Belgrade, Serbia
| | - Vojislav Komlenic
- Department of Restorative Dentistry and Endodontics, University of Belgrade, School of Dental Medicine, DentalNet Research Group, Belgrade, Serbia
| | - Renata Petrovic
- Department of Restorative Dentistry and Endodontics, University of Belgrade, School of Dental Medicine, DentalNet Research Group, Belgrade, Serbia
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Samuel A, Raju R, Sreejith KB, Kalathil BM, Nenavath D, Chaitra VS. Comparative Evaluation of the Surface Hardness of Different Esthetic Restorative Materials: An In Vitro Study. J Pharm Bioallied Sci 2020; 12:S124-S128. [PMID: 33149442 PMCID: PMC7595552 DOI: 10.4103/jpbs.jpbs_40_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 02/04/2020] [Accepted: 03/02/2020] [Indexed: 11/04/2022] Open
Abstract
Aim The aim of this study was to evaluate the surface hardness of a newly developed fiber-reinforced composite and bulkfill composites. Materials and Methods Fiber-reinforced composite and other commercially available bulkfill composites were used. Fifteen cylindrical specimens (5 mm × 5 mm) were made from each material in metal template. Molds were filled in one increment for both bulkfill composites and fiber-reinforced composite and cured using Ivoclar blue phase light-curing unit at a wavelength of 850 mW/cm2. A dark container was used to store specimens to keep dry at room temperature for 24 h before testing. Vickers hardness number (VHN) on the top and bottom surfaces of each specimen was measured by a microhardness tester. Data for VHN were analyzed by using analysis of variance (ANOVA) and pair-wise Newman-Keuls test. Results No significant difference was observed in Vickers hardness test. The mean value of VHN on the top and bottom surfaces showed significant difference from each other. Fiber-reinforced composite showed the highest VHN as compared with other materials. Conclusion Fiber-reinforced composite has the highest Vickers hardness ratio indicating highest degree of conversion and better clinical performance.
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Affiliation(s)
- Anoop Samuel
- Department of Conservative Dentistry and Endodontics, Noorul Islam College of Dental Sciences, Trivandrum, Kerala, India
| | - Rinsa Raju
- Department of Conservative Dentistry and Endodontics, Rajas Dental College & Hospital, Kavalkinaru, Tamil Nadu, India
| | - K B Sreejith
- Department of Conservative Dentistry and Endodontics, Noorul Islam College of Dental Sciences, Trivandrum, Kerala, India
| | - Binitha M Kalathil
- Department of Conservative Dentistry and Endodontics, Rajas Dental College & Hospital, Kavalkinaru, Tamil Nadu, India
| | - Deepthi Nenavath
- Department of Conservative Dentistry and Endodontics, St. Joesph Dental College and Hospital, Eluru, Andhra Pradesh, India
| | - V S Chaitra
- Department of Conservative Dentistry and Endodontics, Noorul Islam College of Dental Sciences, Trivandrum, Kerala, India
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Gonzaga C, Pavelski T, Tocolini D, Correr G, Fernandes da Cunha L. Long-term color stability of orthodontic adhesives after exposure to different staining agents. Indian J Dent Res 2019; 30:568-572. [DOI: 10.4103/ijdr.ijdr_422_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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DOTTA TC, BIANCO VC, CATIRSE ABCEB, ARNEZ MM, CASTELO R, GODOI APTD. Color evaluation of a resin cement light polymerized by different light sources and submitted to potentially staining beverages. REVISTA DE ODONTOLOGIA DA UNESP 2018. [DOI: 10.1590/1807-2577.09918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Abstract Introduction The color stability of resin cements, whether dual-pre-cured or photopolymerizable, as well as the color of the dental substrate, are fundamental for the aesthetic success of ceramic restorations, since the ceramic presents a high level of translucency due to its small thickness. Objective The aim of this in vitro study was to evaluate the color of a resin cement light polymerized by different light sources and immersed in potentially staining beverages. Material and method Were made 42 specimens of resin cement Variolink-Esthetic (2×6mm) (n=7), being half polymerized with LED light (F1) and half with Halogen light (F2). The specimens were stored in artificial saliva at 37 °C±1 °C. After 24 hours, they were polished with abrasive discs, and divided for the purpose of being submitted to the different solutions for 2 minutes per day, for 28 days, as follows: S1 – Coca-Cola; S2 – Red Wine; and S3 – Distilled Water (Control). Five color readouts were taken: T0 – initial; T1 – 7 days; T2 – 14 days; T3 – 21 days; and T4 – 28 days; with a spectrophotometer (Model SP62S). The color change data (ΔE*) were submitted to statistical analysis, ANOVA and Tukey (p≤0.05). Result Analyzing the factor solution, S2 (5.89 (±0.02)), produced a higher ΔE* value than S1 (3.79 (±0.02)) and (S1), a higher value than S3 (1.41 (±0.02)). Analyzing the factor light source, F2 (4.05 (±0.12)), produced a higher ΔE* value than F1 (3.33 (±0.12)). When analyzing the factor time, ΔE* values were found to increase gradually over the course of time: T1(2.36 (±0.08)); T2(3.27 (±0.08)); T3(4.06 (±0.08)); and T4(5.09 (±0.08)). Conclusion It was concluded that red wine produced a greater color change; Halogen light promoted highest degree of pigmentation; and the longer the time of immersion, the greater the color change of the material.
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Amato P, Martins LP, Gatti A, Pretel H, Martins RP. Influence of different wavelengths peaks in LED units on the degree of conversion of orthodontic composites. J World Fed Orthod 2016. [DOI: 10.1016/j.ejwf.2016.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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PLASTER SC, PEIXOTO LM, GUEDES APA, SILVA DN, CASTRO MCC. Efeito de diferentes fotopolimerizadores e meio de imersão na rugosidade e na cor de um compósito nanoparticulado. REVISTA DE ODONTOLOGIA DA UNESP 2016. [DOI: 10.1590/1807-2577.09916] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Resumo Introdução O consumo excessivo de refrigerantes parece alterar as propriedades dos compósitos e essa alteração pode estar relacionada à unidade fotopolimerizadora. Objetivo Avaliar a alteração da rugosidade superficial (ΔR) e da cor (ΔE) de um compósito polimerizado por diferentes fotopolimerizadores, imerso em água destilada ou Coca-Cola®. Metodologia Sessenta amostras da resina nanoparticulada (FiltekMR Z350 XT, 3M) foram distribuídas de acordo com as diferentes unidades de fotopolimerização: a) luz halógena de quartzo-tungstênio-halogênio (QTH); b) Luz de Emissão Diodo - LED 1 com ponteira de polímero; c) LED 2 com ponteira de fibra ótica. Metade de cada grupo (n=10) foi mantida em água destilada ou imersa em Coca-Cola® 2×/dia por 20 minutos, durante 14 dias. Os dados foram submetidos aos testes Mann-Whitney e Kruskal-Wallis (p≤0,05). Resultado A ΔR não foi significante entre os grupos: em água: QTH = 0,006; LED 1 = 0,019; LED 2 = 0,010 (p=0,33); em refrigerante: QTH = 0,021; LED 1= 0,011; LED 2 = 0,030 (p=0,86). A ΔE não foi significativa entre os fotopolimerizadores: em água: QTH = 1,40; LED 1 = 1,80; LED 2 = 1,60 (p=0,31); em refrigerante: QTH = 2,51; LED 1= 1,91; LED 2 = 2,61 (p=0,41), mas foi significante comparando os meios de imersão (p=0,01), exceto para LED 1 (p=0,54). Conclusão As unidades fotopolimerizadoras não interferiram na rugosidade superficial e na cor da resina composta nanoparticulada. Os mergulhos diários em refrigerante não alteraram a lisura, mas alteraram a cor de modo visualmente perceptível, mas clinicamente aceitável, conforme os parâmetros da literatura científica.
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Barão VAR, Ogawa ES, Moreno A, Mesquita MF, Wee AG, Assunção WG. Long-term clinical evaluation of the color stability and stainability of acrylic resin denture teeth. J Prosthet Dent 2015; 113:628-35. [DOI: 10.1016/j.prosdent.2015.02.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 02/02/2015] [Accepted: 02/03/2015] [Indexed: 10/23/2022]
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Leite MLDAES, Silva FDSDCME, Meireles SS, Duarte RM, Andrade AKM. The effect of drinks on color stability and surface roughness of nanocomposites. Eur J Dent 2014; 8:330-336. [PMID: 25202212 PMCID: PMC4144130 DOI: 10.4103/1305-7456.137640] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE The aim was to evaluate the color and surface roughness of nanoparticle (C1) and nanohybrid (C2) composites after immersion in distilled water, acai juice, grape juice and red wine and repolishing. MATERIALS AND METHODS After recording the initial surface roughness and color, the specimens were divided into four groups according to the storage solution. The specimens were reassessed after immersion for 1, 2, 4, 8, and 12 weeks and after repolishing. RESULTS The results showed that after 2 weeks, there were statistically significant changes in color of both resins in all groups, with the exception of the specimens stored in distilled water (P > 0.05). Only 12 weeks of immersion in red wine changed the roughness of composite C1 (P = 0.009). CONCLUSIONS Red wine produced the greatest color change in nanocomposites, followed by grape juice. Acai juice made the color unacceptable clinically only after 12 weeks. Repolishing reduced the color change in all groups.
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Affiliation(s)
| | | | - Sônia Saeger Meireles
- Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Paraíba, João Pessoa, PB, Brazil
| | - Rosângela Marques Duarte
- Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Paraíba, João Pessoa, PB, Brazil
| | - Ana Karina Maciel Andrade
- Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Paraíba, João Pessoa, PB, Brazil
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Moon A, Powers JM, Kiat-Amnuay S. Color stability of denture teeth and acrylic base resin subjected daily to various consumer cleansers. J ESTHET RESTOR DENT 2014; 26:247-55. [PMID: 24980803 DOI: 10.1111/jerd.12109] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
OBJECTIVE This study evaluated color stability of acrylic denture teeth and base resins after 48 weeks of commercial denture cleanser simulation. MATERIALS AND METHODS Two brands of denture teeth (Trubyte Portrait IPN, TP; SR Vivodent DCL, SR) in shades A1, B1, and C1 and three acrylic base resins (Lucitone, LU; Paragon, PA; Valplast, VA) prepared to manufacturer's specifications were exposed 10 hours daily to four cleansers (Clorox Bleach, CB; Polident 3 minute, PO3; Efferdent, EF; and Kleenite, KL) and distilled water control, approximating consumer overnight use. Color measurements used the standard Commision International de l'Eclairage (International Commission on Illumination, CIE L*a*b*) color space (0, 4, 12, 24, 36, and 48 weeks.) Color differences (ΔE*) at 48 weeks were subjected to four-way analysis of variance (ANOVA). Mean values were compared with Fisher's (protected least significant difference) intervals (0.05 significance level). RESULTS Mean color differences (ΔE*) demonstrated color changes in each material. ANOVA-indicated color changes in teeth were significantly affected by both cleansers and teeth brand (p < 0.05), but not shade. Color changes in base resins were significantly affected by cleansers (p < 0.05), but not brand alone. Overall, KL produced the least color change while CB and PO3 produced the most for all materials. CONCLUSIONS After 48 weeks of daily simulation, TP teeth were more color stable than SR in all cleansers except EF (p < 0.0001). Base resin VA was less color stable than LU and PA. Cleanser KL resulted in the lowest color changes. CLINICAL SIGNIFICANCE All tested materials yield clinically acceptable color changes (ΔE* < 3.5); all cleansing methods tested can be recommended, although Kleenite demonstrated the least change after 48 weeks.
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Affiliation(s)
- Audrey Moon
- The University of Texas School of Dentistry at Houston, Houston, Texas, USA
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Coutinho M, Trevizam NC, Takayassu RN, Leme AA, Soares GP. Distance and protective barrier effects on the composite resin degree of conversion. Contemp Clin Dent 2013; 4:152-5. [PMID: 24015001 PMCID: PMC3757874 DOI: 10.4103/0976-237x.114845] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Context: The food wrap films are used to cover the tip of curing light units in order to avoid contamination and prevent damage to the light guide. However, their effects on resin polymerization are not fully known. Aims: We investigated the effects on restoration efficiency of a food wrap protective barrier used on the tip of curing light units. Materials and Methods: For each treatment, five replications were performed, a total of 60 bovine incisor. The degree of conversion (%DC) of restorations with the composite resin Opallis EA2 was evaluated using 3 curing light devices (Optilux 501, Optilight and Ultra LED) and 2 curing distances (0 and 5 mm). The composite resin was tested for restoration of cavities in bovine crowns. %DC values were measured by the Fourier transform infrared spectroscopy-attenuated total reflectance technique. Statistical Analysis Used: The data were analyzed using 3-way ANOVA and Tukey's test. Results: Use of the protective film lowered %DC (F = 4.13; P = 0.05), and the effects of curing distance were associated to the curing light device (F = 3.61; P = 0.03). Conclusions: The distance from the light curing tip and use of a translucent protective barrier on the light-cure device can both impair composite resin %DC.
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Affiliation(s)
- Margareth Coutinho
- Federal University of Mato Grosso do Sul, School of Dentistry Albino Coimbra Filho, Campo Grande, MS, Brazil
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Faverani LP, Barão VAR, Ramalho-Ferreira G, Ferreira MB, Garcia-Júnior IR, Assunção WG. Effect of bleaching agents and soft drink on titanium surface topography. J Biomed Mater Res B Appl Biomater 2013; 102:22-30. [DOI: 10.1002/jbm.b.32949] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 03/17/2013] [Accepted: 03/27/2013] [Indexed: 12/23/2022]
Affiliation(s)
- Leonardo P. Faverani
- Department of Surgery and Integrated Clinic; Aracatuba Dental School; Univ Estadual Paulista (UNESP); Aracatuba SP Brazil
| | - Valentim A. R. Barão
- Department of Prosthodontics and Periodontics; Piracicaba Dental School, University of Campinas (UNICAMP); Piracicaba SP Brazil
| | - Gabriel Ramalho-Ferreira
- Department of Surgery and Integrated Clinic; Aracatuba Dental School; Univ Estadual Paulista (UNESP); Aracatuba SP Brazil
| | - Mayara B. Ferreira
- Department of Dental Materials and Prosthodontics; Aracatuba Dental School, Univ Estadual Paulista (UNESP); Aracatuba SP Brazil
| | - Idelmo R. Garcia-Júnior
- Department of Surgery and Integrated Clinic; Aracatuba Dental School; Univ Estadual Paulista (UNESP); Aracatuba SP Brazil
| | - Wirley G. Assunção
- Department of Dental Materials and Prosthodontics; Aracatuba Dental School, Univ Estadual Paulista (UNESP); Aracatuba SP Brazil
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Catelan A, Santo MRDE, Menegazzo LM, Moraes JCS, dos Santos PH. Effect of light curing modes on mechanical properties of direct and indirect composites. Acta Odontol Scand 2013; 71:697-702. [PMID: 22905998 DOI: 10.3109/00016357.2012.715193] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To evaluate the degree of conversion (DC), flexural strength (FS) and Knoop microhardness (KHN) of direct and indirect composite resins polymerized with different curing systems. MATERIALS AND METHODS Specimens of direct (Z250, 3M/Espe) and indirect (Sinfony, 3M/Espe) restorative materials were made and polymerized using two light curing units: XL2500 (3M/Espe) and Visio system (3M/Espe). Absorption spectra of both composites were obtained on a FTIR spectrometer in order to calculate the DC. FS was evaluated in a universal testing machine and surface microhardness was performed in a microhardness tester (50gf/15s). DC, FS and KHN data were submitted to two-way ANOVA and Tukey's test (α = 0.05). RESULTS Z250 showed higher DC, FS and KHN compared with Sinfony when the polymerization was carried out with XL2500 (p < 0.05). However, there is no statistical difference in DC between the materials when Visio was used (p > 0.05). Visio showed higher DC and KHN for Z250 and Sinfony than the values obtained using XL2500 light curing (p < 0.05). For FS, no significant difference between curing units was found (p > 0.05). CONCLUSION Even though the Visio system could increase DC and KHN for some direct and indirect composites, compared with the conventional halogen curing unit, a high number of monomers did not undergo conversion during the polymerization.
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Affiliation(s)
- Anderson Catelan
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
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