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Schneider LF, Mueller B, Nisie Tango R, Volpato CAM. Effect of coffee staining and simulated oral hygiene methods on the color and translucency of a nanoceramic resin. J ESTHET RESTOR DENT 2024; 36:1020-1028. [PMID: 38445806 DOI: 10.1111/jerd.13214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/20/2024] [Accepted: 02/25/2024] [Indexed: 03/07/2024]
Abstract
OBJECTIVE Evaluate the color and translucency of a nanoceramic resin subjected to hygiene practices and immersion in coffee over time. MATERIALS AND METHODS Specimens (n = 80, HT and LT, 0.5-mm thick) of a nanoceramic resin were obtained and were divided in groups according to the simulated oral hygiene: no intervention (NT), brushing with an electric brush and water (BN), brushing with an electric brush and toothpaste for 10 s (BT), and immersion in mouthwash for 30 s (MW). Oral hygiene practices were repeated after staining in coffee solution for 15, 48, 336, 1440, 8640, and 35,040 min. Spectral wavelengths were recorded with a spectrophotometer at each time. ∆E00, ∆L', ∆C', ∆H', and TP00 were calculated by CIEDE2000 and were evaluated by 2-way ANOVA, repeated measures ANOVA, and Tukey's HSD test (α = 0.05). RESULTS ANOVA showed significance among factors for ΔE00 (p < 0.05), with higher ΔE00 for NT-HT (11.7) and NT-LT (11.2). After T6 (2-year simulation), the lowest values were found for BT-HT (5.3) and BT-LT (4.9). All groups showed a reduction in lightness and translucency and increased chroma and hue. However, the smallest variations were found in the BT groups (p < 0.05). CONCLUSIONS Brushing with toothpaste effectively minimized the color change of NCRs caused by coffee staining. CLINICAL SIGNIFICANCE Oral hygiene practices, such as brushing with toothpaste, might be important to minimize staining of nanoceramic resin restorations, especially in patients who frequently consume coffee.
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Affiliation(s)
- Luiz Felipe Schneider
- Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Bruna Mueller
- Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Rubens Nisie Tango
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, State University of São Paulo, São José dos Campos, Brazil
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Yildiz H, Dedeoglu M, Aydemir M, Oktay H. Evaluation of Long-term colour resistance of composite materials used in aligner treatments: A comparative study. Orthod Craniofac Res 2024. [PMID: 38682453 DOI: 10.1111/ocr.12801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2024] [Indexed: 05/01/2024]
Abstract
AIM The aim of this study is to evaluate the discolouration resistance of attachments made of composites having different physical properties, filler ratios and viscosity through the simulated environment and conditions. MATERIALS AND METHODS Seventy-two extracted human teeth were aligned to simulate upper and lower dental arches. The attachments were prepared according to the guides determined by ClearCorrect. Three different composite groups were used for attachments preparation: Aligner Connect, G-Aenial Universal Injectable, and Tetric Prime and Tetric Evoflow combination. Dental models and aligners were kept in artificial saliva throughout the experiment of 96 weeks. The aligners were also subjected to 2308 thermal cycles and insertion and removing procedures 840 times for each period of 12 weeks. Afterwards, the models were kept in coffee and red wine solutions. Colour measurements were made with Vita Easy Shade 4.0 at 12th, 24th, 48th and 96th simulated weeks. RESULTS No significant difference in discolouration was observed during thermal cycle application of 12th and 24th week experimental periods. In the later periods, discolouration was observed in the composite materials, and G-Aenial Universal Injectable was less coloured than the other samples. The composite samples were more coloured in proportion to their residence time. The G-Aenial Universal Injectable was more affected by wine solution, and Tetric Prime and Tetric Evoflow combination were more affected by coffee solution. CONCLUSIONS Viscosity, resin matrix content and nature of inorganic filler particles of the composite materials significantly affect the colour changing properties of them due to the long-term ageing and exposure to colouring agents.
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Affiliation(s)
- Hilal Yildiz
- Department of Orthodontics, Faculty of Dentistry, Graduate School of Health Sciences, Istanbul Medipol University, Istanbul, Turkey
| | - Mustafa Dedeoglu
- Department of Orthodontics, Faculty of Dentistry, Yeditepe University, Istanbul, Turkey
| | - Merve Aydemir
- Department of Restorative Dentistry, Faculty of Dentistry, Istanbul Aydin University, Istanbul, Turkey
| | - Hüsamettin Oktay
- Department of Orthodontics, Faculty of Dentistry, Istanbul Medipol University, Istanbul, Turkey
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Fidan M, Yağci Ö. Do universal adhesive systems affect color coordinates and color change of single-shade resin composites compared with a multi-shade composite? Dent Mater J 2023; 42:886-893. [PMID: 37914230 DOI: 10.4012/dmj.2023-120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
The objective of the study was the impact of universal adhesives on color coordinates and color change of single-shade resin composites compared with a multi-shade composite after thermocycling. Five resin composites (Filtek Z250, Omnichroma, Vittra APS Unique, Zenchroma, and Charisma Diamond One) were used. The composites were randomly divided into three subgroups: two universal adhesive groups (Single Bond and Gluma Bond) and one control group (n=10). Color measurements were performed initially and after 10,000 thermocycling. Color change (ΔE00) values were calculated using the CIEDE2000 formula. The two-way variance analysis was used (p<0.05). The lowest and highest ΔE00 were exhibited in the Filtek Z250 and Charisma Diamond One (p<0.001, p<0.001, respectively). The highest ΔE00 was exhibited in the Gluma Bond (p<0.001). An adhesive system may adversely affect the color change of resin composite materials. L and a values of resin composites decreased, and the b values increased after thermocycling.
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Affiliation(s)
- Muhammet Fidan
- Department of Restorative Dentistry, Faculty of Dentistry, Usak University
| | - Özhan Yağci
- Department of Restorative Dentistry, Faculty of Dentistry, Usak University
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BÜYÜKGÖZE DİNDAR M, TEKBAŞ ATAY M. Investigation of Short and Long Term Effects of Various Mouthwashes on the Color Stability of Hybrid Composites. BEZMIALEM SCIENCE 2022. [DOI: 10.14235/bas.galenos.2021.76476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Paolone G, Pavan F, Guglielmi PC, Scotti N, Cantatore G, Vichi A. In vitro procedures for color stability evaluation of dental resin-based composites exposed to smoke: A scoping review. Dent Mater J 2022; 41:791-799. [PMID: 36070929 DOI: 10.4012/dmj.2022-106] [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: 11/23/2022]
Abstract
The objective of this study was to review the experimental in vitro procedures employed to assess the color stability of resin-based composites exposed to smoke. A literature search was performed on four databases (Pubmed, Scopus, Embase, and Web of Science). The quality of the included papers was assessed with the Cochrane risk-of-bias tool (RoB 2). In total, 25 studies were selected for full-text reading, from which 12 were included in the review. The assessed variables were: dimensions, shape, time before exposure, finishing, smoke-type, exposure time, brushing simulation, color, measuring system, repolishing. A disk-shaped specimen was used in most studies (n=10) with a 2 mm thickness (n=7) in custom made devices equipped with vacuum pumps or in Vitrocell systems. Spectrophotometers were the most used devices (n=11). Color differences were quantified with ΔE (n=12), ΔE00 (n=1). The large variety of staining procedures suggests the need for standardization.
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Affiliation(s)
- Gaetano Paolone
- Dental School, Department of Restorative Dentistry and Endodontics, IRCCS San Raffaele Hospital, Vita-Salute University
| | - Francesca Pavan
- Dental School, Department of Restorative Dentistry and Endodontics, IRCCS San Raffaele Hospital, Vita-Salute University
| | - Paolo Chiara Guglielmi
- Dental School, Department of Restorative Dentistry and Endodontics, IRCCS San Raffaele Hospital, Vita-Salute University
| | - Nicola Scotti
- Department of Surgical Sciences, Dental School Lingotto
| | - Giuseppe Cantatore
- Dental School, Department of Restorative Dentistry and Endodontics, IRCCS San Raffaele Hospital, Vita-Salute University
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Silva J, Engler MLPD, Baumgardt Barbosa Lima R, Jesús Suarez M, Guy Oliver Salomon JP, Maziero Volpato CA. Color stability of a resin nanoceramic after surface treatments, adhesive cementation, and thermal aging. J Prosthet Dent 2021; 127:498.e1-498.e8. [PMID: 34973836 DOI: 10.1016/j.prosdent.2021.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 12/05/2021] [Accepted: 12/06/2021] [Indexed: 10/19/2022]
Abstract
STATEMENT OF PROBLEM Whether color changes in resin nanoceramic (RNC) restorations can occur because of material and adhesive interface degradation is unclear. PURPOSE The purpose of this in vitro study was to evaluate the color of RNCs submitted to surface treatments, cementation, and aging. MATERIAL AND METHODS RNC specimens (N=120) were produced with a thickness of 0.5 mm. The No Treatment-High/Low Translucency (NT-HT/LT) groups did not receive treatments; the Airborne-particle Abrasion-High/Low Translucency (AA-HT/LT) groups were airborne-particle abraded, and the Airborne-particle Abrasion Silane-High/Low Translucency (AASIL-HT/LT) groups received airborne-particle abrasion and a silane agent. Single specimens (n=60) were measured on a spectrophotometer before and after aging (50 000 cycles). The other half was mounted on composite resin bases and measured. The cleaned specimens were cemented (C) on the bases and measured (T0 and T1). ΔE00, ΔL', ΔC', and ΔH' were obtained by using the CIEDE2000 formula and analyzed by using ANOVA and repeated-measures ANOVA. Multiple comparisons were made by using the Tukey HSD test (α=.05). RESULTS For single specimens, the greatest ΔE00 values were observed in the AA-T1-LT resin (5.87). For mounted and cemented conditions, the greatest ΔE00 values were found in the AA-C-T1-LT resin (1.74), and the ΔE00 ranged from 0.75 (NT-OL) to 1.44 (AASIL-C-T1) for the HT resin (P<.001). The mounted and cemented specimens tended toward red and yellow, whereas lighter specimens were observed after cementation. CONCLUSIONS Aging affected the color of the RNCs evaluated. The single specimens showed greater color differences than the cemented specimens, reinforcing the importance of the adhesive cement in the optical behavior of thin restorations.
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Affiliation(s)
- Joseane Silva
- PhD student, Center for Education and Research on Dental Implants, Post-Graduate Program in Dentistry, Department of Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil.
| | - Madalena Lucia Pinheiro Dias Engler
- PhD student, Center for Education and Research on Dental Implants, Post-Graduate Program in Dentistry, Department of Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil
| | - Rodrigo Baumgardt Barbosa Lima
- PhD student, Center for Education and Research on Dental Implants, Post-Graduate Program in Dentistry, Department of Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil
| | - Maria Jesús Suarez
- Associate Professor, Department of Conservative Dentistry and Buccofacial Prosthesis, Faculty of Dentistry, University Complutense Madrid (UCM), Madrid, Spain
| | | | - Claudia Angela Maziero Volpato
- Associate Professor, Department of Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil
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Aydın N, Karaoglanoglu S, Oktay EA. Investigation the effects of whitening toothpastes on color change of resin-based CAD/CAM blocks. J ESTHET RESTOR DENT 2020; 33:884-890. [PMID: 33161650 DOI: 10.1111/jerd.12627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 05/28/2020] [Accepted: 06/30/2020] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Some colorant foods and beverages cause undesired discoloration on dental restorations. The aim of this study was to investigate the effect of whitening kinds of toothpaste with different active ingredients on the color change of resin-based CAD/CAM blocks. MATERIAL AND METHODS In the study, resin-based CAD/CAM block samples sized 1.5 × 7 × 12 mm, were prepared. Then, to simulate the time-dependent color change, the samples were immersed in coffee (Nescafe Classic, Nestlé) for 14 days. After the color change values of the samples colored in coffee were measured by spectrophotometer, the samples were brushed with different types of whitening toothpastes for 4 minutes. Statistical analysis of the color change (ΔE00 ) was performed using the one-way analysis of variance (ANOVA). RESULTS Color differences occurring on all resin-based CAD/CAM blocks immersed in coffee for 14 days exceeded the 50%:50% perceptibility threshold (PT) (ΔE00 :0.8). There was no statistical significant difference between the whitening toothpastes containing activated charcoal, hydrogen peroxide (HP), blue covarine pigment, and microparticles in color improvement on resin-based CAD/CAM blocks (P > .05). CONCLUSION It has been verified that the discoloration on resin-based CAD/CAM blocks exhibiting color difference above the PT after coffee immersion can be reduced by utilizing toothpastes containing whiteners. CLINICAL SIGNIFICANCE Color changes that occur over time in resin-based CAD/CAM blocks can be a clinical problem. These color changes in the materials can be reduced below the PT level using whitening toothpastes.
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Affiliation(s)
- Numan Aydın
- Gulhane Faculty of Dentistry, Department of Restorative Dental Treatment, University of Health Sciences, Ankara, Turkey
| | - Serpil Karaoglanoglu
- Gulhane Faculty of Dentistry, Department of Restorative Dental Treatment, University of Health Sciences, Ankara, Turkey
| | - Elif Aybala Oktay
- Gulhane Faculty of Dentistry, Department of Restorative Dental Treatment, University of Health Sciences, Ankara, Turkey
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Stamenković DD, Tango RN, Todorović A, Karasan D, Sailer I, Paravina RD. Staining and aging-dependent changes in color of CAD-CAM materials. J Prosthet Dent 2020; 126:672-678. [PMID: 33041075 DOI: 10.1016/j.prosdent.2020.09.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 09/03/2020] [Accepted: 09/03/2020] [Indexed: 11/15/2022]
Abstract
STATEMENT OF PROBLEM Consumption of some beverages and aging may affect the color of dental materials used in fixed prosthodontics, but their effect on recently introduced materials is not well known. PURPOSE The purpose of this in vitro study was to evaluate staining, aging, and the exposure interval on color changes of computer-aided design and computer-aided manufacturing (CAD-CAM) resin nanoceramics (RNC), polymer-infiltrated ceramic-network (PICN) materials, and lithium silicate and lithium disilicate ceramics. MATERIAL AND METHODS A total of 288 square-shaped, 1-mm-thick specimens prepared from Cerasmart, IPS e.max, Lava Ultimate, Shofu HC, Vita Enamic, and Vita Suprinity were polished by using laboratory and chairside methods in accordance with the manufacturers' instructions. Color data were recorded with a benchtop spectrophotometer, and CIEDE2000 color differences (ΔE00) were calculated. After the baseline measurements (T0), the specimens were divided into 3 groups (n=8) and exposed to staining in coffee and wine and to accelerated artificial aging. The specimens were stored in staining solutions at 37 °C for 60 (T1) and 120 hours (T2). Accelerated aging was performed by using a xenon lamp weathering test chamber for a total exposure of 150 (T1) and 300 kJ/m2 (T2). The results were analyzed by using the t test, ANOVA, and the Tukey honestly significant difference test (α=.05). Color differences of ΔE00 ≤0.8 and ≤1.8 corresponding to the 50:50% perceptibility threshold and 50:50% acceptability threshold were used to interpret the results. RESULTS As color differences (ΔE00) between laboratory and chairside polishing were not statistically significant (T=-0.81, P=.418), only the results for chairside polished specimens were presented. Color differences for the T0-T1 comparisons ranged from 0.2 to 4.2, T0-T2 from 0.3 to 6.5, and T1-T2 from 0.1 to 2.3. ANOVA showed significance of factors and for interactions (P<.05). Lithium silicate-based and lithium disilicate-based ceramic materials were more color stable than RCN and PICN materials on exposure to coffee and red wine. Color changes greater than acceptability threshold after immersion in coffee were recorded for 3 (T0-T1), 4 (T0-T2), and 2 (T1-T2) materials. Corresponding findings after immersion in wine were 1, 3, and 0 and after artificial aging 0, 2, and 0. ΔE00 and ΔEab values were highly correlated (R2=0.97). CONCLUSIONS No difference was found in color stability among laboratory and chairside polished specimens. Coffee caused the greatest color changes for T0-T2 interval. Staining-dependent color differences increased with increased exposure, except for IPS e.max and Vita Suprinity. For artificial aging, color change appeared to be material dependent.
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Affiliation(s)
- Dejan D Stamenković
- Professional Trainee, Houston Center for Biomaterials and Biomimetics (HCBB), University of Texas School of Dentistry at Houston, Houston, Texas; Private practice, Belgrade, Serbia
| | - Rubens Nisie Tango
- Associate Professor, Department of Dental Materials and Prosthodontics, State University of Sao Paulo (UNESP) School of Dentistry at Sao Jose dos Campos, Sao Jose dos Campos, Brazil; Visiting Scientist, Houston Center for Biomaterials and Biomimetics (HCBB), University of Texas School of Dentistry at Houston, Houston, Texas
| | - Ana Todorović
- Teaching Assistant, Department of Prosthodontics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Duygu Karasan
- Research Assistant, Division of Fixed Prosthodontics and Biomaterials, University of Geneva, Geneva, Switzerland
| | - Irena Sailer
- Professor and Chair, Division of Fixed Prosthodontics and Biomaterials, University of Geneva, Geneva, Switzerland
| | - Rade D Paravina
- Professor, Department of Restorative Dentistry and Prosthodontics and Director, Houston Center for Biomaterials and Biomimetics (HCBB), University of Texas School of Dentistry at Houston, Houston, Texas.
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Aydın N, Karaoğlanoğlu S, Oktay EA, Kılıçarslan MA. Investigating the color changes on resin‐based CAD/CAM Blocks. J ESTHET RESTOR DENT 2019; 32:251-256. [DOI: 10.1111/jerd.12561] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 10/31/2019] [Accepted: 12/11/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Numan Aydın
- Gulhane Faculty of Dentistry, Department of Restorative Dental TreatmentUniversity of Health Sciences Ankara Turkey
| | - Serpil Karaoğlanoğlu
- Gulhane Faculty of Dentistry, Department of Restorative Dental TreatmentUniversity of Health Sciences Ankara Turkey
| | - Elif A. Oktay
- Gulhane Faculty of Dentistry, Department of Restorative Dental TreatmentUniversity of Health Sciences Ankara Turkey
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Dellazzana FZ, Rodrigues CS, Mallmann A, Jacques LB. Optical Properties of a Glass Ceramic and an Indirect Resin Composite: Effects of Polishing and Staining. JOURNAL OF HEALTH SCIENCES 2019. [DOI: 10.17921/2447-8938.2019v21n5p512-517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
AbstractLittle information is available about the optical behavior of glass ceramics and indirect resin composites. This study aimed to evaluate if an indirect resin composite can present similar behavior of color stability and translucency to a glass ceramic after polishing and aging in staining beverage. Specimens of a dental ceramic (IPS e.max Ceram) and an indirect resin composite (SR Adoro) were made. Half the specimens of each material were polished with disc-shaped tips. Groups were divided according to aging media: distilled water or immersion in red wine for 20 min/day during 30 days. CIE L*a*b* coordinates were measured with a spectrophotometer at baseline and after 30 days of aging. Color change was calculated by CIEDE2000 and translucency was calculated by contrast ratio (CR). Statistical analysis were performed with ANOVA and Tukey tests. Aging in red wine caused perceptible color change in both materials. Polishing only increased color change of indirect composite when aged in red wine. Ceramic groups showed greater opacity than the composite in all measurements. The indirect composite remained more translucent and results showed that it is capable of presenting color stability similar to a ceramic. However, polishing seems to increase its color change. Keywords: Ceramics. Color. Composite Resins. Dental Polishing. ResumoPouca informação comparando o comportamento óptico de cerâmicas vítreas e resinas compostas indiretas estão disponíveis na literatura. O objetivo deste estudo foi avaliar se uma resina composta indireta pode apresentar comportamento semelhante a uma cerâmica vítrea em relação à estabilidade de cor e translucidez após polimento e envelhecimento em meio altamente pigmentante. Espécimes de uma cerâmica vítrea (IPS e.max Ceram) e uma resina composta indireta (SR Adoro) foram preparados. Metade dos espécimes de cada material foram polidas com pontas de polimento. Os grupos foram divididos conforme o meio de armazenamento: água destilada ou vinho tinto por 20 min/dia durante 30 dias. As coordenadas CIEL*a*b* foram medidas com espectrofotômetro previamente e após os 30 dias de armazenamento. A alteração de cor foi calculada pela equação CIEDE2000 e a translucidez foi calculada por razão de contraste. A análise estatística foi realizada pelos testes ANOVA e teste de Tukey. O armazenamento em vinho levou a uma alteração de cor perceptível nos dois materiais. O polimento apenas causou alteração de cor na resina composta indireta quando imersa em vinho tinto. A resina composta indireta manteve-se mais translúcida e os resultados mostraram que esse material é capaz de apresentar estabilidade de cor semelhante à cerâmica. No entanto, o polimento parece aumentar sua alteração de cor. Palavras-chave: Cerâmica. Cor. Polimento Dentário. Resinas Compostas.
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Pérez‐Mondragón AA, Cuevas‐Suárez CE, Trejo‐Carbajal N, Piva E, Fernandes da Silva A, Herrera‐González AM. Evaluation of monomers derived from resorcinol as eluents of bisphenol A glycidyl dimethacrylate for the formulation of dental composite resins. J Appl Polym Sci 2019. [DOI: 10.1002/app.48576] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Alma Antonia Pérez‐Mondragón
- Doctorado en Ciencias de los MaterialesUniversidad Autónoma del Estado de Hidalgo, Carretera Pachuca‐Tulancingo Km. 4.5, Col. Carboneras, Mineral de la Reforma, Hgo. C.P. 42184 Mexico
| | - Carlos Enrique Cuevas‐Suárez
- Área Académica de OdontologíaUniversidad Autónoma del Estado de Hidalgo, Ex‐Hacienda la Concepción s/n, San Agustín Tlaxiaca, Hgo. C.P. 42169 Mexico
| | - Nayely Trejo‐Carbajal
- Laboratorio de Polímeros, Instituto de Ciencias Básicas e Ingeniería Universidad Autónoma del Estado de HidalgoMineral de la Reforma Hidalgo C.P. 42184 Mexico
| | - Evandro Piva
- Instituto de Ciencias Básicas e IngenieríaUniversidad Autónoma del Estado de Hidalgo, Carretera Pachuca‐Tulancingo Km. 4.5, Col. Carboneras, Mineral de la Reforma, Hgo. C.P. 42184 Mexico
| | - Adriana Fernandes da Silva
- Department of Restorative DentistrySchool of Dentistry, Federal University of Pelotas, R. Gonçalves Chaves, 457, Centro Pelotas—RS 96015‐560 Brazil
| | - Ana María Herrera‐González
- Laboratorio de Polímeros, Instituto de Ciencias Básicas e Ingeniería Universidad Autónoma del Estado de HidalgoMineral de la Reforma Hidalgo C.P. 42184 Mexico
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Zhou X, Huang X, Li M, Peng X, Wang S, Zhou X, Cheng L. Development and status of resin composite as dental restorative materials. J Appl Polym Sci 2019. [DOI: 10.1002/app.48180] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xinxuan Zhou
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Xiaoyu Huang
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- Department of Operative Dentistry and Endodontics, West China Hospital of StomatologySichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Mingyun Li
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Xian Peng
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Suping Wang
- Department of Operative Dentistry and Endodontics & Stomatology CenterThe First Affiliated Hospital of Zhengzhou University Zhengzhou 540052 Henan China
| | - Xuedong Zhou
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- Department of Operative Dentistry and Endodontics, West China Hospital of StomatologySichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Lei Cheng
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- Department of Operative Dentistry and Endodontics, West China Hospital of StomatologySichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
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Marjanovic J, Veljovic DN, Stasic JN, Savic-Stankovic T, Trifkovic B, Miletic V. Optical properties of composite restorations influenced by dissimilar dentin restoratives. Dent Mater 2018; 34:737-745. [DOI: 10.1016/j.dental.2018.01.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 01/16/2018] [Accepted: 01/16/2018] [Indexed: 11/16/2022]
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Pala K, Tekçe N, Tuncer S, Serim ME, Demirci M. Evaluation of the surface hardness, roughness, gloss and color of composites after different finishing/polishing treatments and thermocycling using a multitechnique approach. Dent Mater J 2017; 35:278-89. [PMID: 27041019 DOI: 10.4012/dmj.2015-260] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objectives of this study were to evaluate the mechanical and physical properties of resin composites. The materials evaluated were the Clearfil Majesty Posterior, Filtek Z550 and G-aenial Posterior composites. A total of 189 specimens were fabricated for microhardness, roughness, gloss and color tests. The specimens were divided into three finishing and polishing systems: Enhance, OneGloss and Sof-Lex Spiral. Microhardness, roughness, gloss and color were measured after 24 h and after 10,000 thermocycles. Two samples from each group were evaluated using SEM and AFM. G-aenial Posterior exhibited the lowest microhardness values. The mean roughness ranged from 0.37 to 0.61 µm. The smoothest surfaces were obtained with Sof-Lex Spiral for each material. G-aenial Posterior with Enhance was determined to be the glossiest surfaces. All of the materials exhibited similar ΔE values ranging between 1.69 and 2.75. Sof-Lex Spiral discs could be used successfully to polish composites.
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Affiliation(s)
- Kanşad Pala
- Department of Restorative Dentistry, Faculty of Dentistry, Erciyes University
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Tabatabaei MH, Farahat F, Ahmadi E, Hassani Z. Effect of Accelerated Aging on Color Change of Direct and Indirect Fiber-Reinforced Composite Restorations. JOURNAL OF DENTISTRY (TEHRAN, IRAN) 2016; 13:168-175. [PMID: 28392813 PMCID: PMC5376543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES The aim of this study was to assess the effect of artificial accelerated aging (AAA) on color change of direct and indirect fiber-reinforced composite (FRC) restorations. MATERIALS AND METHODS Direct (Z250) and indirect (Gradia) composite resins were reinforced with glass (GF) and polyethylene fibers (PF) based on the manufacturers' instructions. Forty samples were fabricated and divided into eight groups (n=5). Four groups served as experimental groups and the remaining four served as controls. Color change (ΔE) and color parameters (ΔL*, Δa*, Δb*) were read at baseline and after AAA based on the CIELAB system. Three-way ANOVA and Tukey's test were used for statistical analysis. RESULTS Significant differences were found in ΔE, ΔL*, Δa* and Δb* among the groups after AAA (P<0.05). Most of the studied samples demonstrated an increase in lightness and a red-yellow shift after AAA. CONCLUSIONS The obtained ΔE values were unacceptable after AAA (ΔE≥ 3.3). All indirect samples showed a green-blue shift with a reduction in lightness except for Gradia/PF+ NuliteF.
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Affiliation(s)
- Masoumeh Hasani Tabatabaei
- Associate Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Farnaz Farahat
- Assistant Professor, Department of Operative Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Elham Ahmadi
- Assistant Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran,Corresponding author: E. Ahmadi, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran,
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In vitro evaluation of the marginal integrity of CAD/CAM interim crowns. J Prosthet Dent 2016; 115:617-23. [PMID: 26774313 DOI: 10.1016/j.prosdent.2015.10.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 10/09/2015] [Accepted: 10/13/2015] [Indexed: 11/23/2022]
Abstract
STATEMENT OF PROBLEM The accuracy of interim crowns made with computer-aided design and computer-aided manufacturing (CAD/CAM) systems has not been well investigated. PURPOSE The purpose of this in vitro study was to evaluate the marginal integrity of interim crowns made by CAD/CAM compared with that of conventional polymethylmethacrylate (PMMA) crowns. MATERIAL AND METHODS A dentoform mandibular left second premolar was prepared for a ceramic crown and scanned for the fabrication of 60 stereolithical resin dies, half of which were scanned to fabricate 15 Telio CAD-CEREC and 15 Paradigm MZ100-E4D-E4D crowns. Fifteen Caulk and 15 Jet interim crowns were made on the remaining resin dies. All crowns were cemented with Tempgrip under a 17.8-N load, thermocycled for 1000 cycles, placed in 0.5% acid fuschin for 24 hours, and embedded in epoxy resin before sectioning from the mid-buccal to mid-lingual surface. The marginal discrepancy was measured using a traveling microscope, and dye penetration was measured as a percentage of the overall length under the crown. RESULTS The mean vertical marginal discrepancy of the conventionally made interim crowns was greater than for the CAD/CAM crowns (P=.006), while no difference was found for the horizontal component (P=.276). The mean vertical marginal discrepancy at the facial surface of the Caulk crowns was significantly greater than that of the other 3 types of interim crowns (P<.001). At the facial margin, the mean horizontal component of the Telio crowns was significantly larger than that of the other 3 types, with no difference at the lingual margins (P=.150). The mean percentage dye penetration for the Paradigm MZ100-E4D crowns was significantly greater and for Jet crowns significantly smaller than for the other 3 crowns (P<.001). However, the mean percentage dye penetration was significantly correlated with the vertical and horizontal marginal discrepancies of the Jet interim crowns at the facial surface and with the horizontal marginal discrepancies of the Caulk interim crowns at the lingual surface (P<.01 in each instance). CONCLUSIONS A significantly smaller vertical marginal discrepancy was found with the interim crowns fabricated by CAD/CAM as compared with PMMA crowns; however, this difference was not observed for the horizontal component. The percentage dye penetration was correlated with vertical and horizontal discrepancies at the facial surface for the Jet interim crowns and with horizontal discrepancies at the lingual surface for the Caulk interim crowns.
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Likai W, Yanan L, Yan Z, Pingping L. [Color stability of ceromer of different thicknesses and resin adhesive materials of different types after accelerated aging]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2015; 33:201-205. [PMID: 26189242 PMCID: PMC7040991 DOI: 10.7518/hxkq.2015.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Revised: 11/25/2014] [Indexed: 06/04/2023]
Abstract
OBJECTIVE This study aims to investigate the color stability of ceromer with different thicknesses and different types of resin adhesive materials after accelerated aging and provide references for clinical application and selections. METHODS Nine groups of experimental samples were used, and each group contained five samples. We made joint samples with ceromer having three different thicknesses (1.00, 0.75, 0.50 mm) combined with three different resin adhesive materials (RelyX Veneer, RelyX Unicem, Filtek Z350 Flow), respectively. All samples were placed into Xenon Lamp Aging Instrument to implement accelerated aging. Spectrophotometer was used to measure the lightness (L*), red green color value (a*), and blue yellow color value (b*) of all samples before and after accelerated aging. The change of lightness (ΔL), red green color value (Δa), blue yellow color value (Δb), and color variation (ΔE) were also calculated. We investigated the influence of ceromer veneer thicknesses and resin adhesive material types on color variation by two-factor analysis of variance. RESULTS The thickness and type factors showed significant influence on ΔE values, and exhibited interactions (P < 0.05). The ΔE values of all experimental groups were lower than 3.3. After the accelerated aging process, all L*, a*, and b* values of the experimental groups decreased and the ΔL values were lower than 2.0. CONCLUSION Ceromer veneer thickness and resin adhesive material types could affect the color stability of ceromer veneer and resin adhesive materials. The changes in lightness and color in ceromer veneer and resin adhesive materials are considered clinically acceptable after accelerated aging.
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Iskander M, Elkassas D, Mohsen MA. Effect of Two Matrix Metalloproteinase Inhibitors on the Color Stability of a Nanofilled Resin Composite. Oper Dent 2015; 40:E11-20. [DOI: 10.2341/12-428-l] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objectives
This in vitro study evaluated the effect of two matrix metalloproteinase (MMP) inhibitors on the color stability of two shades of a nanofilled resin composite.
Methods and Materials
A total of 60 sound human molars were used in this study. Flat dentin surfaces were obtained by wet grinding the occlusal surfaces. Following acid etching, the molars were divided into three equal groups according to the MMP inhibitor used: Group 1: no inhibitor (control group), group 2: chlorhexidine digluconate based (CHX; Consepsis, Ultradent, South Jordan, UT, USA); group 3: doxycycline based (MTAD; Biopure, Dentsply TulsaDental, Johnson, TN, USA). Adper Single Bond 2 Adhesive (3M ESPE, St Paul, MN, USA) was applied to the treated dentin surfaces. Each group was then subdivided into two equal subgroups of 10 molars each, according to the shade of the resin composite (Filtek Z350 XT, 3M ESPE) used, either B1 or A3. The color was assessed for each subgroup at three times: baseline (after 24 hours); after aging using a total energy of 600 kJ/m2 (Weather-Ometer Ci35A, Atlas Electronic Devices Company, Chicago, IL, USA); and then after a second period of aging, for a total energy of 1200 kJ/m2. Color assessment was carried out using a spectrophotometer. Color change (ΔE) was calculated according to the Commission Internationale de l'Eclairage L*a* b* color scale, comparing each aging period with the baseline color measurement. Data were analyzed using repeated measures analysis of variance and Tukey post hoc test.
Results
All tested subgroups showed greater discoloration than the clinically acceptable level (3.3). MTAD induced the highest statistically significant color change, followed by CHX, whereas the control groups showed the lowest statistical ΔE values with both tested shades. Shade B1 subgroups showed higher ΔE values when compared with shade A3 subgroups.
Conclusion
Accelerated aging caused color change in a nanofilled resin composite regardless of MMP inhibitor used. Furthermore, lighter shades showed less color stability when compared with darker shades.
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Affiliation(s)
- M Iskander
- Mireille Hany Iskander, DMD, Operative Dentistry, Misr International University, Cairo, Egypt
| | - D Elkassas
- Dina W Elkassas, BDS, MSc, PhD, associate professor, Operative Dentistry Department, Faculty of Oral and Dental Medicine, Misr International University, Cairo, Egypt
| | - MA Mohsen
- Mohamed Abdel Mohsen, BDS, MSc, PhD, professor, Operative Dentistry Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
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Xing W, Jiang T, Liang S, Sa Y, Wang Z, Chen X, Wang Y. Effect of in-office bleaching agents on the color changes of stained ceromers and direct composite resins. Acta Odontol Scand 2014; 72:1032-8. [PMID: 25196263 DOI: 10.3109/00016357.2014.946962] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To evaluate the effect of two in-office bleaching agents on the color changes of two ceromers (Ceramage and Adoro SR) and one direct composite resin (Gradia Direct Anterior) after staining by tea and coffee. MATERIALS AND METHODS Twenty-four disk-shaped specimens were fabricated for each resin material and randomly divided into three groups (n = 8). The specimens were immersed in tea, coffee or deionized water, respectively, for 7 days. Each group was then equally divided into two sub-groups (n = 4), which were subjected to two in-office bleaching agents (BEYOND and Opalescence Boost), respectively. The color of the specimens was measured by a spectrophotometer at baseline, after staining and after bleaching. The color differences (ΔE values) between baseline and after treatments were calculated. RESULTS Statistical analysis indicated that the staining solution had significant influence on the color change of resin composites tested (p < 0.001). The discolorations of resin composites were perceptible after immersing in tea or coffee solutions (ΔE>2.0). There was no statistically significant difference between BEYOND and Opalescence Boost in stains removal from discolored resins (p = 0.550). The color changes in ΔE value between baseline and after bleaching were less than 2.0 for all resin composite groups. CONCLUSIONS Tea solution produces severe discoloration of three resin composites tested. The two in-office bleaching agents can effectively remove the stains from two ceromers and one direct composite resin tested in this study.
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Affiliation(s)
- Wenzhong Xing
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University , Wuhan , PR China
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Arocha MA, Basilio J, Llopis J, Di Bella E, Roig M, Ardu S, Mayoral JR. Colour stainability of indirect CAD-CAM processed composites vs. conventionally laboratory processed composites after immersion in staining solutions. J Dent 2014; 42:831-8. [PMID: 24746713 DOI: 10.1016/j.jdent.2014.04.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 03/30/2014] [Accepted: 04/06/2014] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES The aim of this study was to determine, by using a spectrophotometer device, the colour stainability of two indirect CAD/CAM processed composites in comparison with two conventionally laboratory-processed composites after being immersed 4 weeks in staining solutions such as coffee, black tea and red wine, using distilled water as control group. METHODS Two indirect CAD/CAM composites (Lava Ultimate and Paradigm MZ100) and two conventionally laboratory-processed composites (SR Adoro and Premise Indirect) of shade A2 were selected (160 disc samples). Colour stainability was measured after 4 weeks of immersion in three staining solutions (black tea, coffee, red wine) and distilled water. Specimen's colour was measured each week by means of a spectrophotometer (CIE L*a*b* system). Statistical analysis was carried out performing repeated ANOVA measurements and Tukey's HSD test to evaluate differences in ΔE00 measurements between groups; the interactions among composites, staining solutions and time duration were also evaluated. RESULTS All materials showed significant discoloration (p<0.01) when compared to control group. The highest ΔE00 observed was with red wine, whereas black tea showed the lowest one. Indirect laboratory-processed resin composites showed the highest colour stability compared with CAD/CAM resin blocks. CONCLUSIONS CAD/CAM processed composites immersed in staining solutions showed lower colour stability when compared to conventionally laboratory-processed resin composites. CLINICAL SIGNIFICANCE The demand for CAD/CAM restorations has been increasing; however, colour stainability for such material has been insufficiently studied. Moreover, this has not been performed comparing CAD/CAM processed composites versus laboratory-processed indirect composites by immersing in staining solutions for long immersion periods.
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Affiliation(s)
- Mariana A Arocha
- Department of Restorative Dentistry and Endodontics, International University of Catalonia, Barcelona, Spain
| | - Juan Basilio
- Department of Restorative Dentistry and Endodontics, International University of Catalonia, Barcelona, Spain
| | - Jaume Llopis
- Department of Biostatistics, International University of Catalonia, Barcelona, Spain
| | - Enrico Di Bella
- Departments of Economics and Quantitative Methods, University of Genoa, Italy
| | - Miguel Roig
- Department of Restorative Dentistry and Endodontics, International University of Catalonia, Barcelona, Spain
| | - Stefano Ardu
- Division of Cariology and Endodontology, School of Dentistry, University of Geneva, Switzerland
| | - Juan R Mayoral
- Department of Restorative Dentistry and Endodontics, International University of Catalonia, Barcelona, Spain.
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Egilmez F, Ergun G, Cekic-Nagas I, Vallittu PK, Lassila LVJ. Short and long term effects of additional post curing and polishing systems on the color change of dental nano-composites. Dent Mater J 2014; 32:107-14. [PMID: 23370878 DOI: 10.4012/dmj.2012-251] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose was to determine the short and long term effects of polishing systems and post-heat-light curing on the color stability of nano-composites. The disc shaped samples (ø=10 mm, h=3 mm) were prepared. Forty subgroups (n=5) were designed according to two different curing conditions and five different polishing methods. Color change measurements were performed on the day of specimen preparation (base) and repeated after 1 and 7 months of water storage. MANOVA and Tukey's post hoc tests were applied (p<0.05). While the color difference values of resin composites were ranked as EXP2>EXP1>CME≥XTE after 1 month (p<0.05), after 7 months the ranking was EXP2≥EXP1>XTE>CME (p<0.05). Type and compositions of nano-composites may be important on the long-term color stability of the restoration. Additional post-heat-light curing of nano-composites may produce higher color change than the hand-light curing protocol. Consequently, the polishing procedures should be applied to obtain more resistant composite surface to discoloration.
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Affiliation(s)
- Ferhan Egilmez
- Gazi University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Turkey.
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Imai H, Koizumi H, Sasaki K, Matsumura H. The influence of polymerization conditions on color stability of three indirect composite materials. J Oral Sci 2013; 55:51-5. [PMID: 23485601 DOI: 10.2334/josnusd.55.51] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The aim of the present study was to evaluate color change and color stability against aqueous media of three indirect composite materials (Epricord, Estenia, and Twiny) that were polymerized with different systems. Disk-shaped specimens were prepared with their proprietary polymerization systems or with a metal halide light polymerization unit (Twinkle X). The specimens were then immersed in water or tea. Change in color from baseline (24 h) to 4 weeks was determined with a chromameter (ShadeEye NCC) using a white background. The L*, a*, and b* values for both states were determined, and ΔE*(ab) values were calculated. The Estenia specimens immersed in tea had significantly lower ΔL* (-7.0 to -5.6) and significantly higher ΔE*(ab) values (6.5 to 8.6) than did the Epricord and Twiny specimens, under all polymerization conditions. The results indicate that after tea immersion the Estenia material was less stable against color change than were the other two materials. The Twinkle X metal halide unit was suitable for polymerization of the three composite materials, using an exposure period of 60 s or longer.
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Affiliation(s)
- Hideyuki Imai
- Dental Technician Training School, Nihon University School of Dentistry, Tokyo, Japan.
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Kentrou C, Papadopoulos T, Lagouvardos P. Color changes in staining solutions of four light-cured indirect resin composites. Odontology 2013; 102:189-96. [PMID: 23417275 DOI: 10.1007/s10266-013-0106-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 01/20/2013] [Indexed: 11/24/2022]
Abstract
The purpose of this study was to investigate the effect of different staining solutions on the color coordinates of indirect light-cured resin composites. 112 discs were made using four indirect composites, Signum+/Haraeus-Kulzer, Sinfony/3M-Espe, GC Gradia/GC, Ena HRi/Micerium, and divided into four groups which immersed in tea, coffee, chocolate and distilled water, at 37 °C, for 4 weeks. The color, before and after immersion for 1, 2, 3 and 4 weeks, was measured according to CIELAB system and ΔL*, Δa*, Δb* and ΔE* values were calculated for all immersion periods. The effect of time, solution and material on primary and secondary color coordinates was estimated using two-way repeated ANOVAs and pairwise comparisons, at a = 0.05. The results showed that coffee strongly affected all the materials (p < 0.05), followed by tea and chocolate. Sinfony presented the highest color change (p < 0.05), due to changes in b* and L* coordinates. Color coordinates were affected differently by material type and solution. In conclusion, this study showed that the color of indirect resin composites was affected by all three examined factors (immersion time, staining solution and material type), in a clinically appreciable level (ΔΕ* > 2.7 U) even from the first week, and in an unacceptable level (ΔΕ* > 5.5 U) in the second, third and fourth week, depending on the staining solution and the material.
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Affiliation(s)
- Christina Kentrou
- Department of Biomaterials, Dental School, University of Athens, Athens, Greece
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Ayano M. Changes in chroma of two indirect composite materials polymerized with different polymerization systems. J Oral Sci 2012; 54:349-54. [PMID: 23221161 DOI: 10.2334/josnusd.54.349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
This study evaluated chroma change in two composite materials (Sinfony and Pearleste) polymerized with two different systems. Disk specimens were prepared using a metal halide unit (Hyper LII) and an exposure time of 60 to 180 s. The proprietary polymerization systems (Visio and Pearlcure systems) were used as the reference polymerization modes. After storage at 37°C for 24 h, CIE 1976 L*a*b* values were measured by using a dental chroma meter (ShadeEye NCC) with a gray background. The specimens were then immersed in water or tea. Color change from baseline to 4 weeks was evaluated by measuring ΔL*, Δa*, and Δb*, after which ΔE*(ab) values were calculated. The brightness of Sinfony specimens was reduced by tea immersion. The color of both materials shifted to yellow after tea immersion, although color change in Sinfony specimens was greater than that in Pearleste specimens. For both materials, color change was less after polymerization with the metal halide unit. In conclusion, Sinfony polymerized with the Hyper LII unit, and Pearleste polymerized with either system, were stable against discoloration due to tea immersion.
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Affiliation(s)
- Michiya Ayano
- Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
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