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Awdaljan MW, Roque JC, Choi J, Rondón LF. Introducing a novel approach to dental color reproduction using AI technology. J ESTHET RESTOR DENT 2024. [PMID: 39154348 DOI: 10.1111/jerd.13300] [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: 05/01/2024] [Revised: 07/22/2024] [Accepted: 08/04/2024] [Indexed: 08/20/2024]
Abstract
OBJECTIVE This article aims to describe a systematic method for tooth color reproduction with ceramics restorations employing artificial intelligence (AI) software named Matisse. It provides a comprehensive analysis of the entire process, beginning with shade-taking and extending to ceramic application in a complex clinical case in the anterior region-specifically, a single central restoration supported by an implant. CLINICAL CONSIDERATIONS The clinical case presented highlights the potential of Matisse software for generating ceramic (inSync-Jensen Dental, USA) and staining (Miyo-Jensen Dental, USA) recipes over a zirconia abutment (Katana-Noritake Dental, Japan). This approach achieves an optimal single central restoration utilizing CAD-CAM and layering techniques. CONCLUSIONS The systematic method employing the Matisse software achieved accurate color reproduction for a single central restoration supported by an implant. This result was achieved by the dental ceramist within the first attempt and without seeing the patient in the entire process. CLINICAL SIGNIFICANCE The Matisse AI-assisted protocol offers a systematic and scientifically grounded method for color reproduction in dentistry for indirect restorations.
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Affiliation(s)
| | - João Carlos Roque
- Biomaterials Group (BIOMAT), Biomedical and Oral Sciences Research Unit (UICOB), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
| | - James Choi
- Maven Dental Studio, Private Dental Laboratory, Oakbrook Terrace, Illinois, USA
| | - Luis Felipe Rondón
- Department of Restorative Dentistry, Dental School, São Paulo State University - UNESP, São Paulo, Brazil
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Bratner S, Hannak W, Boening K, Klinke T. Comparison of different illumination intensities of mobile units for tooth color differentiation: An in vitro study. J Prosthet Dent 2024; 131:918-924. [PMID: 35491259 DOI: 10.1016/j.prosdent.2022.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 03/07/2022] [Accepted: 03/07/2022] [Indexed: 11/25/2022]
Abstract
STATEMENT OF PROBLEM Visual color determination in clinics or dental offices should take place under reproducible environmental conditions. To reduce false tooth color measurements, daylight and illumination lamps (5000-7500 K) have been recommended. Those can be used either as stationary or mobile handheld illumination units. However, depending on the manufacturer, the handheld lights use different illuminance brightness, and whether the choice of unit affects shade selection is unclear. PURPOSE The purpose of this in vitro study was to determine whether the mobile handheld light-emitting diode (LED) lighting unit shows a significantly better result in visual color determination than the conventional reference lighting unit. MATERIAL AND METHODS Trained preclinical dental students (N=23) with a mean ±standard deviation age of 24 ±5 years participated in the study. Two color differentiation lamps (Smile lite 1620lx and Dialite Color 4450lx) (SL and DC) were each placed at a 15-cm distance to determine the color of the shade tabs (templates, N=10) with the VITA Linear Guide 3D Master in a double-blinded study. According to the manufacturer's recommendation, polarization filters were used with the Smile lite lamp. RESULTS Of N=220 shade determinations each, 31.8% (SL) and 33.2% (DC) were correct; the median (ΔE00) and interquartile range were 0.96 (±3.32) for SL and 1.35 (±3.28) for DC. The differences between the groups were not statistically significant (P=.67). CONCLUSIONS The results show that the use of the mobile LED illumination unit did not improve color determination compared with the reference illumination. The different illumination intensities of 980 lux (SL) with a polarizing filter or 1500 lux (DC) did not have a positive effect.
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Affiliation(s)
- Siegfried Bratner
- Medical Science Doctor, Department of Prosthodontics and Material sciences, University Leipzig, Leipzig, Germany
| | - Wolfgang Hannak
- Associate Professor, Charité, Universitätsmedizin Berlin, Abteilung für Zahnärztliche Prothetik, Alterszahnmedizin und Funktionslehre, Berlin, Germany
| | - Klaus Boening
- Professor, Dental Medicine Polyclinic for Dental Prosthetics, University Hospital Carl Gustav Carus Dresden, Dresden, Germany
| | - Thomas Klinke
- Associate Professor, Department of Prosthodontics, Gerodontology and Dental Materials, Dental School, University Greifswald, Greifswald, Germany.
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Hampé-Kautz V, Roman T, Schwob T, Cournault B, Etienne O. In-vivo repeatability of three intra-oral spectrophotometers. J ESTHET RESTOR DENT 2024; 36:520-526. [PMID: 38168888 DOI: 10.1111/jerd.13182] [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: 08/03/2023] [Revised: 11/16/2023] [Accepted: 11/29/2023] [Indexed: 01/05/2024]
Abstract
OBJECTIVE The objective was to assess the repeatability of three spectrophotometers, based on the CIELCh factors and shadeguide reference measurements. MATERIALS AND METHODS Color analysis was performed using three devices: Rayplicker, Easyshade 4, and Easyshade V. Five repeated measures were performed by the same operator, on the right central maxillary incisor of 30 patients. The CIELCh factors were retrieved and the intra-class correlation was calculated. The Vita Classical and Vita 3D Master shadeguides were used to evaluate the respective Fleiss' Kappa factors. RESULTS Rayplicker and Easyshade V demonstrated strong intra-class correlation based on the CIELCh factors: 0.98, 0.99, and 0.91 for Rayplicker, and 0.95, 0.99, and 0.93 for Easyshade V, for the L*, C*, and h* parameters, respectively. Regarding the repeatability of the shadeguide data, while Easyshade 4 had the best repeatability when using the Vita Classical as a reference, Rayplicker and Easyshade V showed better repeatability when using the Vita 3D Master. CONCLUSION These findings suggest that both Rayplicker and Easyshade V are reliable devices for measuring CIELCh parameters. In terms of shadeguide references, the reliability of spectrophotometers is generally lower compared to the CIELCh measurements. CLINICAL SIGNIFICANCE Given their good repeatability, both the Rayplicker and the Easyshade V spectrophotometers are reliable tools for prosthetic dental practices.
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Affiliation(s)
| | - Tatiana Roman
- Robert Frank Dental Faculty, University of Strasbourg, Strasbourg, France
- INSERM U1121, Strasbourg, France
- Icube UMR7357, Strasbourg, France
| | - Thibault Schwob
- Robert Frank Dental Faculty, University of Strasbourg, Strasbourg, France
| | - Bérangère Cournault
- Robert Frank Dental Faculty, University of Strasbourg, Strasbourg, France
- INSERM U1121, Strasbourg, France
| | - Olivier Etienne
- Robert Frank Dental Faculty, University of Strasbourg, Strasbourg, France
- INSERM U1121, Strasbourg, France
- Icube UMR7357, Strasbourg, France
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Díaz Hernández A, Celemín Viñuela A, Gómez-Polo M, Martín Casado AM, Gómez-Polo C. Coverage error and shade-match accuracy in three ceramic gingival systems. J Prosthet Dent 2023:S0022-3913(23)00608-X. [PMID: 37793952 DOI: 10.1016/j.prosdent.2023.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 10/06/2023]
Abstract
STATEMENT OF PROBLEM Research into the coverage error (CE) of gingival systems that have been expanded by using ceramic specimens created by mixing basic colors is lacking. PURPOSE The purpose of this in vitro study was to compare the CEs of 3 ceramic gingival color systems that have been expanded with basic-color mixtures from a sample of 360 White participants and to classify the participants according to the accuracy of the shade match achieved with each system. MATERIAL AND METHODS L*a*b* color coordinates were recorded in 3 zones of attached gingiva for 360 White participants with healthy gingival tissue (187 men and 173 women). The CEs were calculated for 3 ceramic gingival systems that had been expanded with specimens obtained by mixing the basic colors in consecutive order, the color percentages in each mixture having been altered by 10% increments. The systems were Heraceram (Kulzer GmbH) (n=51); Vita VM9 (Vita-Zahnfabrik) (n=41); and IPS Style (Ivoclar AG) (n=41). The participants were classified into 3 groups according to how well the selected shade matched their gingival color (excellent, acceptable, or poor). The data were analyzed using a 1-way ANOVA with a randomized block design and the homogeneity of proportions test (α=.05). RESULTS Statistically significant differences were found between the CEs of the 3 expanded gingival systems in the 3 zones where gingival color was measured (P<.001). The expanded Heraceram system had the smallest CE (ΔE00: minimum 2.66 in the middle zone and maximum 2.95 at the mucogingival line). In the 3 gingival zones, the expanded IPS Style system produced the largest percentage of participants with a poor shade match (ΔE00: minimum 71.4% at the mucogingival line and maximum 75.8% at the free gingival margin), while the expanded Heraceram system had the lowest percentage of participants with a poor shade match (ΔE00: minimum 33.3% in the middle zone and maximum 41.7% at the mucogingival line). CONCLUSIONS The CEs calculated for the expanded Vita VM9 and IPS Style ceramic gingival color systems exceeded the clinical acceptability thresholds in the 3 zones examined. According to the ΔE00 formula, the gingival color of at least 33% of participants matched poorly with the expanded systems studied.
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Affiliation(s)
- Alejandra Díaz Hernández
- PhD student, Department of Dentistry, School of Medicine, University Complutense of Madrid, Madrid, Spain
| | - Alicia Celemín Viñuela
- Research Professor, Department of Dentistry, School of Medicine, University Complutense of Madrid, Madrid, Spain
| | - Miguel Gómez-Polo
- Full Professor, Department of Dentistry, School of Medicine, University Complutense of Madrid, Madrid, Spain
| | - Ana María Martín Casado
- Full Professor, Department of Statistics, School of Medicine, University of Salamanca, Salamanca, Spain
| | - Cristina Gómez-Polo
- Full Professor, Department of Surgery, School of Medicine, University of Salamanca, Salamanca, Spain..
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Vichi A, Corciolani G, Carrabba M, Munoz A, Louca C. Influence of Thickness of Opaque Porcelain and Alloy Color on the Final Color of Porcelain-Fused-to-Metal Restorations. MATERIALS (BASEL, SWITZERLAND) 2023; 16:457. [PMID: 36614796 PMCID: PMC9821996 DOI: 10.3390/ma16010457] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/14/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
Despite the advent of metal-free solutions, porcelain-fused-to-metal restorations (PFM) are still widely used. Particularly for the latest ceramic systems, scarce information is present in the scientific literature about the ideal opaque layer thickness and the alloy color impact to achieve the desired final color of PFM restorations. This study aimed to evaluate the influence of opaque thickness variation layered on different metal alloys on the final color of PFM restorations. Opaque porcelain of one metal−ceramic system (VITA VM13) was layered in four different thicknesses (0.10 mm, 0.15 mm, 0.20 mm, and 0.25 mm) on three differently colored dental alloys: a gold−platinum alloy (yellowish), a gold−palladium alloy (light grayish), and a nickel−chromium alloy (dark grayish). The veneering porcelain layered over the opaque was kept constant (Base Dentine 0.45 mm, Transpa Dentine 0.50 mm, and Enamel 0.20 mm). Sixty specimens were fabricated, five samples for each combination of alloy/opaque thickness. The color difference (ΔE) between specimen and reference was measured using a clinical spectrophotometer. The two-way ANOVA revealed that the thickness of both the opaque (p < 0.001) and the metal alloy (p < 0.001) significantly influenced the ΔE values. Gray-colored alloys covered by a 0.10 mm thick opaque layer enabled the closest color match, whereas this occurred for yellow-color alloys covered by a 0.15 mm thick opaque layer. In contrast, the samples covered by a 0.25 mm thick opaque layer obtained the worst ΔE.
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Affiliation(s)
- Alessandro Vichi
- Dental Academy, University of Portsmouth, Portsmouth PO1 2QG, UK
| | | | | | - Alvaro Munoz
- Faculty of Dentistry, University of Chile, Santiago 8380544, Chile
| | - Chris Louca
- Dental Academy, University of Portsmouth, Portsmouth PO1 2QG, UK
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Mansourinejad S, Ahmadzadeh A, Mansourinejad S, Rohani A. Spectrophotometric comparison of two porcelain systems, VMK master and VM13 with the VITA 3D-master shade guide (An in vitro study). Dent Res J (Isfahan) 2022. [DOI: 10.4103/1735-3327.344158] [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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Miura S, Tsukada S, Fujita T, Isogai T, Teshigawara D, Saito-Murakami K, Asami K, Fujisawa M. Effects of abutment tooth and luting agent colors on final color of high-translucent zirconia crowns. J Prosthodont Res 2021; 66:243-249. [PMID: 34321374 DOI: 10.2186/jpr.jpr_d_21_00025] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE This study aimed to evaluate the effects of the tooth portion evaluated and the colors of the abutment tooth and resin luting agent on the final color of monolithic zirconia crowns. METHODS Monolithic zirconia crowns were fabricated for left maxillary central incisors using two shades (A2 and A3) of highly translucent monolithic zirconia disks. A model of the abutment tooth was fabricated using resin core materials (white: W; dentin: D). The color of the crowns was measured with try-in pastes (clear: C; brown: B) as a resin-luting agent substitute. The measurement was performed after placing the crown on the model with the attached abutment tooth with try-in paste. The color of three labial portions (cervical, body, and incisal) was evaluated using a dental spectrophotometer. The color difference (ΔE) between the CIELab values of the zirconia disks and the final me asurement of zirconia crowns was calculated. RESULTS The ΔE between the crown of the A2 shade and the zirconia disk of the A2 shade had the highest ΔE value in the body portion with W-B (ΔE=3.92). Similarly, the A3 shade had the highest ΔE value in the cervical portion, with W-B (ΔE=4.27). The results of three-way ANOVA showed that the ΔE values were influenced by the tooth portion evaluated and the color of the abutment tooth. CONCLUSIONS The final color of the monolithic zirconia crowns was significantly in fluenced by the tooth portion evaluated and the color of the abutment tooth.
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Affiliation(s)
- Shoko Miura
- Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Saitama
| | - Shohei Tsukada
- Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Saitama
| | - Takafumi Fujita
- Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Saitama
| | - Tomonori Isogai
- Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Saitama
| | - Daisuke Teshigawara
- Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Saitama
| | - Konatsu Saito-Murakami
- Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Saitama
| | - Kazuya Asami
- Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Saitama
| | - Masanori Fujisawa
- Division of Fixed Prosthodontics, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Saitama
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Xu B. Effects of dentin and enamel porcelain layer thickness on the color of various ceramic restorations. J ESTHET RESTOR DENT 2021; 33:1051-1058. [PMID: 34254726 PMCID: PMC9292658 DOI: 10.1111/jerd.12802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 05/09/2021] [Accepted: 06/22/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To investigate the effects of dentin and enamel porcelain layer thickness on the color of various ceramic restorations. MATERIALS AND METHODS Eighty specimens (shade A2 and A3, n = 10) (20 mm in length, 4 mm in width, 1.5 mm in thickness respectively) of casting ceramic (EM); alumina ceramic (AL); zirconia ceramic (ZR); and porcelain-fused-metal (PFM) were prepared. The color distributions of each specimen were measured at 4 places using a spectroradiometer. The dentin/enamel porcelain (D/E) layer thicknesses of the 4 places were 0.8/0.2 mm, 0.6/0.4 mm, 0.4/0.6 mm, and 0.2/0.8 mm. The color differences (ΔE00 ) between the specimens and the corresponding color shade tabs were calculated. Data were analyzed using three-way repeated-measures ANOVA and Holm-Sidak pairwise comparisons (a = 0.05). The acceptability threshold (AT) was used to analyze the results. RESULTS The minimum ΔE00 values were 1.31 (0.6/0.4 mm for EM), 1.41 (0.8/0.2 mm for AL), and 1.92 (0.2/0.8 mm for ZR) for shade A2, and 0.93 (0.6/0.4 mm for EM), 0.89 (0.8/0.2 mm for AL), and 1.34 (0.8/0.2 mm for ZR) for shade A3. Most of them were below AT value (1.8). For AL and ZR (shade A2) and ZR (shade A3), the D/E layer thicknesses of 0.8/0.2 mm and 0.6/0.4 mm had lower ΔE00 values than 0.4/0.6 mm and 0.2/0.8 mm (p ≤ 0.001). CONCLUSIONS The dentin/enamel porcelain layer thickness that was most color-matched to the shade tab was different for various ceramic restorations. The color of shade A2 AL and ZR and shade A3 ZR was closer to the shade tab when dentin porcelain was thicker than enamel porcelain. CLINICAL SIGNIFICANCE Matching the shade of ceramic restoration to the shade tab color is a great challenge in esthetic dentistry. The dentin/enamel porcelain layer thickness is an important factor to influence the improved color matching.
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Affiliation(s)
- Binting Xu
- Attending Physician, College of Stomatology, Chongqing Medical University & Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences & Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
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Bai XD, Yan YZ, Li Q. Spectrophotometric evaluation of color errors generated in the visual color duplication procedure for current ceramic veneers. J Dent Sci 2020; 16:145-153. [PMID: 33384791 PMCID: PMC7770292 DOI: 10.1016/j.jds.2020.06.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 06/29/2020] [Indexed: 11/25/2022] Open
Abstract
Background/purpose Color errors associated with the visual color duplication approach for ceramic laminate veneers are still challenging in esthetic dentistry. The aim of this study is to evaluate color errors generated during traditional visual shade matching approach. Materials and methods Eighteen stooth-shaped veneer discs (shade A2 and 0.7 mm in thickness) were fabricated using six veneer materials. The veneer specimens placed on five extracted teeth with nominal shade A2 formed veneer-tooth combinations. Color coordinates of the A2 shade tab, the extracted teeth, and the veneer-tooth combinations were measured using a spectrophotometer. Then, the veneers were reduced to 0.5 mm, and 0.3 mm in thickness consecutively. Color measurements were performed repeatedly. Color differences of the extracted teeth to veneer-tooth combinations (ΔEt-v), veneer-tooth combinations to shade tab (ΔEv-s), and translucency parameter (TP) values were calculated and analyzed using Two-way ANOVA. Results ΔEt-v ranged from 2.0937 to 5.0603 (mean of 3.1833±1.5485). Mean of ΔEv-s was 4.0103±1.8508. ΔEt-v and ΔEv-s values were significantly influenced by veneer material and thickness (P<0.05). TP values decreased gradually with the lessening of veneers thickness. Conclusion Acceptable color duplication of ceramic veneers cannot be achieved by routine visual shade replica protocols, when the thickness of veneers is less than 0.7 mm. Specified color matching standards for the ceramic veneers are needed.
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Affiliation(s)
- Xue-Dong Bai
- Department of Prosthodontics, Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Yu-Zhu Yan
- Department of Prosthodontics, Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Qing Li
- Department of Prosthodontics, Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China
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Perroni AP, Kaizer MR, Della Bona A, Moraes RR, Boscato N. Influence of light-cured luting agents and associated factors on the color of ceramic laminate veneers: A systematic review of in vitro studies. Dent Mater 2018; 34:1610-1624. [DOI: 10.1016/j.dental.2018.08.298] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 08/28/2018] [Indexed: 11/25/2022]
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Xing W, Chen X, Ren D, Zhan K, Wang Y. The effect of ceramic thickness and resin cement shades on the color matching of ceramic veneers in discolored teeth. Odontology 2017; 105:460-466. [PMID: 28074386 DOI: 10.1007/s10266-016-0287-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 11/18/2016] [Indexed: 10/20/2022]
Abstract
The objective of this study was to analyze the effects of ceramic material thickness and resin cement shade on the color matching of ceramic veneers at the gray tooth structures. Seventy-two artificial maxillary right central incisor teeth (C2 shade) were prepared according to veneer tooth preparation in practice. Ceramic materials (LT, A2 shade, IPS e.max Press) were selected to fabricate the 0.50- and 0.75-mm thick veneers at the body region. The ceramic veneer specimens were bonded to the artificial teeth by the 6 shades of resin cements (Variolink Veneer: shades of HV+3, LV-2, LV-3; and RelyXTM Veneer: shades of WO, TR, A3). A clinical spectrophotometer (Crystaleye, Olympus) was used to measure the color parameters. The color differences (ΔE values) of ceramic veneers and A2 shade tab (Vitapan Classical, Vita) and C* ab values were calculated. The results of three-way ANOVA indicated that the ΔE values of ceramic veneer and A2 shade tab were significantly different in the thickness of ceramic materials, shades of resin cements, and measuring regions (p < 0.001). There were significant differences in 0.50-mm-thick ceramic veneers that exhibited higher ΔE values compared with veneers that were 0.75-mm thick. Tukey's HSD test showed that the average ΔE values in body region were significantly smaller than that in cervical and incisal regions. The color matching of ceramic veneers was significantly influenced not only by the ceramic thickness and the resin cement shades but also the tooth regions.
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Affiliation(s)
- Wenzhong Xing
- Department of Prosthetics, Dalian Stomatological Hospital, Dalian, 116021, China
| | - Xiaodong Chen
- Department of Prosthetics, Dalian Stomatological Hospital, Dalian, 116021, China
| | - Dafei Ren
- Department of Prosthetics, Dalian Stomatological Hospital, Dalian, 116021, China
| | - Kangru Zhan
- Department of Prosthetics, Dalian Stomatological Hospital, Dalian, 116021, China
| | - Yining Wang
- Key Laboratory for Oral Biomedical Engineering, Ministry of Education, School and Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan, 430079, China.
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Chen XD, Hong G, Xing WZ, Wang YN. The influence of resin cements on the final color of ceramic veneers. J Prosthodont Res 2015; 59:172-7. [PMID: 25840891 DOI: 10.1016/j.jpor.2015.03.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 02/15/2015] [Accepted: 03/02/2015] [Indexed: 11/16/2022]
Abstract
PURPOSE To evaluate the effect of three brands of resin cement on the final color of ceramic veneers. METHODS 50 disk-shaped ceramic specimens (IPS e.Max, 0.6mm×8.0mm diameter) and disk-shaped composite resin background specimens (4.0mm×8.0mm diameter) were prepared and divided into 10 groups (n=5). These paired specimens were bonded using ten shades of resin cement (Variolink Veneer, shades LV-3, LV-2, MV, HV+2, HV+3; Panavia F, shades light and brown; and RelyX™ Veneer, shades WO, TR, A3). A spectrophotometer (VITA Easyshade) was used to measure the color parameters (CIE L*a*b* values) of the paired disks before and after cementation. The color differences (ΔE values) after cementation were calculated and statistically analyzed by the One-way ANOVA (at the significant level p<0.05). RESULTS The color parameters of the ceramic disks were measured in terms of the increase in L* value, and the decrease in Cab(*) value after bonding with the resin cement. The ΔE values of ceramic disks after cementation ranged from 1.38 to 7.16. The ΔE values were more than 3.3 when the ceramic disks were cemented with resin cements in shade HV+3 (4.90) and shade WO (7.16). One-way ANOVA of ΔE values revealed significant differences in the resin cement shades. CONCLUSIONS Resin cements can affect the final color of ceramic veneer restorations, and the extent of this effect varies according to the resin cement shades.
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Affiliation(s)
- Xiao-Dong Chen
- 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, China; Department of Prosthetics, Dalian Stomatological Hospital, Dalian, China
| | - Guang Hong
- Liaison Center for Innovative Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Wen-Zhong Xing
- Department of Prosthetics, Dalian Stomatological Hospital, Dalian, China
| | - Yi-Ning Wang
- 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, China.
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Öngül D, Şermet B, Balkaya MC. Visual and instrumental evaluation of color match ability of 2 shade guides on a ceramic system. J Prosthet Dent 2012; 108:9-14. [DOI: 10.1016/s0022-3913(12)60102-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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