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Ansarifard E, Taghva M, Mosaddad SA, Akhlaghian M. The impact of various substrates, ceramic shades, and brands on the ultimate color and masking capacity of highly translucent monolithic zirconia: an in vitro study. Odontology 2024:10.1007/s10266-024-00996-0. [PMID: 39222097 DOI: 10.1007/s10266-024-00996-0] [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] [Accepted: 08/15/2024] [Indexed: 09/04/2024]
Abstract
This study aimed to examine the impact of substrates, ceramic shades, and brands on the color and masking ability of highly translucent monolithic zirconia (HTMZ) using CIELab and CIEΔE2000 metrics. A total of 156 1-mm thick HTMZ disks in shades A1, A2, and A3 were produced using Dental Direkt and Kerox zirconia brands. Four 3-mm thick substrates (nickel-chromium alloy, non-precious gold alloy (NPG), zirconia shade A2, and resin composite shade A2) were prepared. HTMZ disks were overlaid on these substrates, and color measurements were taken with a spectrophotometer. Color differences (ΔE) were analyzed using CIELab and CIEΔE2000 formulas. The influence of brand, shade, substrate, and their interactions on ΔE values was assessed with a General Linear Model (GLM) and LSD pairwise comparison test. Spearman's correlation test examined the relationship between CIELab and CIEΔE2000 values. Results indicated that ΔEab was significantly influenced by substrate type and shade, while ΔE2000 was also affected by the ceramic brand. Mean color differences across ceramic-substrate groups were within clinically acceptable and perceptible ranges (clinically perceptible: ∆Eab ≥ 1.3 and ∆E2000 ≥ 0.8; clinically acceptable: 0.8 < ∆E2000 ≤ 1.8 and 1.3 < ∆Eab ≤ 2.7), except for NPG, which had ΔE values exceeding the perceptible range (ΔE2000: 1.1 ± 0.11 to 1.8 ± 0.31; ΔEab: 1.61 ± 0.15 to 2.16 ± 0.36). A significant correlation (r = 0.974, P < 0.001) was found between ΔEab and ΔE2000. Various ceramic brands and shades led to notable ΔE variations, yet average color differences within all ceramic-substrate groups remained clinically acceptable. Both ΔEab and ΔE2000 were reliable methods with a strong correlation for measuring color differences.
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Affiliation(s)
- Elham Ansarifard
- Department of Prosthodontics, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Masumeh Taghva
- Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Ali Mosaddad
- Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
- Department of Research Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India.
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
- Department of Conservative Dentistry and Bucofacial Prostheses, Faculty of Odontology, University Complutense of Madrid, Madrid, Spain.
| | - Marzieh Akhlaghian
- Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
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Moecke SE, Silva AGDCS, Borges AB, Torres CRG. Optical properties of esthetic temporary cements and final restoration color. J Am Dent Assoc 2023; 154:461-470. [PMID: 37115140 DOI: 10.1016/j.adaj.2023.03.010] [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: 08/22/2022] [Revised: 02/03/2023] [Accepted: 03/03/2023] [Indexed: 04/29/2023]
Abstract
BACKGROUND Opaque cements can be esthetically unfavorable and alternative translucent materials have been developed. The aim of this study was to evaluate the color interference of a new translucent cement compared with conventional materials, in association with interim restoration with different thickness and shades. METHODS Bis-acryl composite disks were prepared in 2 thicknesses (1.2 mm, 0.6 mm) and 3 shades (A3.5, A2, bleached) to simulate the restorations. Cementation over dentin disks was performed with 1 translucent cement (Provicol QM Aesthetic; VOCO), 2 conventional cements (Provicol; VOCO, Temp-Bond NE; Kerr Dental), and 1 transparent liquid (polyethylene glycol 400). The difference between the color of the specimens cemented with the transparent liquid and that of the specimens cemented with each cement was calculated (ΔEab). The data were analyzed using 3-way analysis of variance and Tukey tests (5%). RESULTS Significant differences were observed for all factors and some interactions (P < .05). For Provicol QM Aesthetic, the shade and thickness did not influence the ΔEab. For Provicol and Temp-Bond NE, the lighter and thinner the specimen, the higher the ΔEab. Only Provicol QM Aesthetic had smaller means than the perceptibility threshold. Temp-Bond NE and Provicol had higher values than the acceptability threshold for some combinations. CONCLUSIONS The highly translucent cement had less color interference than the conventional materials. The thickness and resin shade only affected the results for the opaque cements. The thinner specimens and the lighter shades had higher color interference. PRACTICAL IMPLICATIONS The use of a more translucent cement can produce a smaller color interference on the esthetic outcome of interim restorations.
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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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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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Durães I, Cavalcanti A, Mathias P. The Thickness and Opacity of Aesthetic Materials Influence the Restoration of Discolored Teeth. Oper Dent 2021; 46:559-565. [PMID: 34919719 DOI: 10.2341/19-093-l] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2020] [Indexed: 11/23/2022]
Abstract
OBJECTIVES This study aimed to evaluate the influence of thickness and opacity on the ability of composite resin and ceramic veneer restorations to mask discolored teeth. METHODS Ninety veneers were made of lithium disilicate ceramic, shades BL1 and 0 (IPS e.max Press, Ivoclar Vivadent), and 60 were made of composite resin, shade BL-L (IPS Empress Direct, Ivoclar Vivadent). The veneers measured 4 mm in width x 4 mm in length and had a thickness of 0.7, 1.0, or 1.2 mm. One hundred and fifty human premolars were selected to obtain 150 dental fragments with the following dimensions: 4 mm x 4 mm x 3 mm (width x length x thickness). The fragments were discolored, submitted to color measurement and randomly assigned to 15 groups (n=10) according to the type and opacity of the restorative material (IPS e.max Press: high translucency [HT], low translucency [LT], and medium opacity [MO]; IPS Empress Direct: dentin and enamel) and thickness of the veneers (0.7, 1.0, and 1.2 mm). After cementation of the ceramic or composite resin veneers using a translucent resin cement (RelyX veneer, 3M), a final color measurement was taken from each specimen and the total color variation (ΔE) was calculated by subtracting the initial and the final color measurement. The final lightness (L*) of the restored dental fragments was also calculated. RESULTS The highest ΔE values were observed for the LT and MO ceramic groups, followed by dentin composite resin. Regarding the different thicknesses of ceramic veneers, every 1.2-mm-thick group had higher values of ΔE, considering their respective opacities (p<0.05). The highest lightness values were found for the LT and MO ceramic veneers (thickness of 1.2 mm). Dentin-shade composite resins showed similar lightness values in all groups. CONCLUSION The best thickness/opacity combinations for masking discolored dental substrates were LT and MO ceramic veneers with 1.2-mm thickness. Dentin-shade composite resin veneers with a thickness of 0.7-1.0 mm showed good ability to mask discolored dental substrates.
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Affiliation(s)
- I Durães
- Iris Durães, MS, post-gradute student, PÓS Instituto de Ciências da Saude, Salvador, Brazil
| | - A Cavalcanti
- Andrea Cavalcanti, MS, PhD, professor, Bahia School of Medicine and Public Health (EBMSP), Department of Oral Rehabilitation, Salvador, Brazil
| | - P Mathias
- *Paula Mathias, MS, PhD, professor, Federal University of Bahia, Department of Clinical Dentistry, Salvador, Brazil
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Al Amri MD, Labban N, Alhijji S, Alamri H, Iskandar M, Platt JA. In Vitro Evaluation of Translucency and Color Stability of CAD/CAM Polymer‐Infiltrated Ceramic Materials after Accelerated Aging. J Prosthodont 2020; 30:318-328. [DOI: 10.1111/jopr.13239] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2020] [Indexed: 11/29/2022] Open
Affiliation(s)
- Mohammad D. Al Amri
- Department of Prosthetic Dental Sciences College of Dentistry, King Saud University Riyadh Saudi Arabia
| | - Nawaf Labban
- Department of Prosthetic Dental Sciences College of Dentistry, King Saud University Riyadh Saudi Arabia
| | - Saleh Alhijji
- Indiana University School of Dentistry Indianapolis IN
- College of Applied Medical Sciences, King Saud University Riyadh Saudi Arabia
| | - Hassan Alamri
- Department of Prosthetic Dental Sciences College of Dentistry, King Saud University Riyadh Saudi Arabia
| | | | - Jeffrey A. Platt
- Department of Biomedical Sciences and Comprehensive Care Division of Dental Materials, Indiana University School of Dentistry Indianapolis IN
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Tuncel İ, Turp I. Effects of coloring procedures on shear bond strength between resin cement and colored zirconia. Eur Oral Res 2019; 52:122-126. [PMID: 30775714 DOI: 10.26650/eor.2018.440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/21/2017] [Accepted: 03/07/2017] [Indexed: 11/20/2022] Open
Abstract
PURPOSE Debonding is expected as a frequent failure type in zirconia restorations. Therefore the aim of the current study is to evaluate the shear bond strength between colored zirconia and resin cement. MATERIALS AND METHODS There were 11 groups evaluated each containing 12 zirconia discs (15 mm x 12 mm x 1.6 mm). Groups were colored with the colors A3, B1, C4, D2, and D4 of the VITA classical shade scale. Coloring procedure was carried out for either 3 second or 60 seconds for the study groups and the control group was left untreated. Specimens were then bonded to translucent resin cement having a thickness of 3 mm and width of 3 mm. The shear bond strength of the samples was measured in a universal testing machine with a crosshead speed of 1 mm per minute. Two-way analysis of variance and Tukey's HSD test were used for pairwise comparisons. Also paired t-test was used for comparing groups with the same color but having different shading times. RESULTS Any significant difference was not found between the shear bond strengths of samples depending on whether color or shading times. Among the groups, B1 (60 seconds of coloring) had the highest bond strength (10.05 MPa), while A3 (60 seconds of coloring) showed the lowest bond strength (6.72 MPa). However, these differences were not statistically significant. CONCLUSION Coloring zirconia did not affect the shear bond strength between zirconia and resin cement.
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Affiliation(s)
- İlkin Tuncel
- Department of Prosthodontics, University of Bezmialem, Faculty of Dentistry, İstanbul, Turkey
| | - Işıl Turp
- Department of Prosthodontics, University of Bezmialem, Faculty of Dentistry, İstanbul, Turkey
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SILAMI FDJ, PRATAVIEIRA S, NOGUEIRA MS, BARRETT AA, SINHORETI MAC, GERALDELI S, PIRES-DE-SOUZA FDCP. Quantitative image of fluorescence of ceramic and resin-cement veneers. Braz Oral Res 2019; 33:e0088. [DOI: 10.1590/1807-3107bor-2019.vol33.0088] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 08/02/2019] [Indexed: 11/22/2022] Open
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Prieto LT, Pimenta de Araújo CT, Araujo Pierote JJ, Salles de Oliveira DCR, Coppini EK, Sartini Paulillo LAM. Evaluation of degree of conversion and the effect of thermal aging on the color stability of resin cements and flowable composite. JOURNAL OF CONSERVATIVE DENTISTRY : JCD 2018; 21:47-51. [PMID: 29628647 PMCID: PMC5852935 DOI: 10.4103/jcd.jcd_128_17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Purpose: The aim of this in vitro study was to evaluate the color stability and degree of conversion (DC) of dual-cure and light-cure cements and flowable composites after thermal aging. Materials and Methods: A total of 50 human incisors were prepared and divided into six groups (n = 10). Veneers were fabricated using IPS Empress Direct composite resin were bonded with three types of luting agents: Light-cured, conventional dual, and flowable composite according to the manufacturer's instructions. The groups were as follows: Filtek Z350XT Flow/Single Bond 2, RelyX ARC/Single Bond 2, RelyX Veneer/Single Bond 2, Tetric N-Flow/Tetric N-Bond, and Variolink II/Tetric N-Bond. Commission Internationale de l'Éclairage L*, a* and b* color coordinates were measured 24 h after cementation procedure with a color spectrophotometer and reevaluated after 10,000 thermal cycles. To evaluate the DC 50 specimens (n = 10) of each resin material were obtained and Fourier transform infrared spectroscopy was used to evaluate the absorption spectra. Statistical analysis was performed with one-way ANOVA and Tukey's test (α = 0.05). Results: No statistically significant differences in ΔE* occurred after aging. The greatest change in lightness occurred in the Variolink II resin cement. Changes in red–green hue were very small for the same cement and largest in the Tetric N-Flow flowable resin composite, while the greatest change in blue–yellow hue was a yellowing of the RelyX ARC luting cement. RelyX ARC exhibited the highest DC, and there were no statistically significant differences in DC among the other cements. Conclusions: Resin-based luting agent might affect the final of ceramic veneer restorations. The thermal aging affected the final color of the evaluated materials, and these were regarded as clinically unacceptable (ΔE >3.3).
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Affiliation(s)
- Lúcia Trazzi Prieto
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Sao Paulo, Brazil
| | - Cíntia Tereza Pimenta de Araújo
- Department of Dentistry, Faculty of Sciences of Health, Federal University of Jequitinhonha and Mucuri Valley, Diamantina, MG, Brazil
| | - Josué Junior Araujo Pierote
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Sao Paulo, Brazil
| | | | - Erick Kamiya Coppini
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Sao Paulo, Brazil
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Zeighami S, Gheidari A, Mahgoli H, Rohanian A, Ghodsi S. Effect of Sandblasting Angle and Distance on Biaxial Flexural Strength of Zirconia-based Ceramics. J Contemp Dent Pract 2017. [PMID: 28621271 DOI: 10.5005/jp-journals-10024-2062] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIM Surface treatment is necessarily required for bonding of zirconia to the veneering porcelain and luting cements. Sandblasting is the most common and probably the most efficient surface treatment method. Sandblasting roughens the surface and may affect the flexural strength of zirconia. Different sandblasting protocols may yield variable results. This study sought to assess the effect of sandblasting angle and distance on the biaxial flexural strength of zirconia-based ceramics. MATERIALS AND METHODS This in vitro experimental study was conducted on 50 zirconia discs measuring 1.2 ± 0.2 mm in thickness and 15 ± 0.2 mm in diameter, which were randomly divided into five groups (n = 10) of one control and four experimental groups subjected to sandblasting with 110 μm aluminum oxide particles under 2 bar pressure for 10 seconds at 15 and 25 mm distances and 45 and 90° angles (between the nozzle head and zirconia surface). Surface roughness was measured by a roughness tester and samples were subjected to thermocycling followed by biaxial flexural strength testing according to ISO6872. The data were analyzed using one-way analysis of variance (p < 0.05). RESULTS No statistically significant difference was noted in the mean biaxial flexural strength of the five groups (p = 0.40). Different sandblasting protocols yielded significantly different surface roughness values (p < 0.001). The highest and the lowest mean surface roughness belonged to 15 mm/90° (0.51 μm) and control (0.001 μm) groups respectively. CONCLUSION Change in sandblasting angle and distance had no significant effect on the biaxial flexural strength of zirconia-based ceramic, but surface roughness was significantly different in the study groups. Clinical significances: Regardless of sandblasting angle, increasing distance to 25 mm significantly decreases surface roughness that may negatively affect zirconia bond strength.
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Affiliation(s)
- Somayeh Zeighami
- Dental Research Center, Dentistry Research Institute and Department of Prosthodontics, School of Dentistry Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Ali Gheidari
- Private Dental Clinic, Tehran, Islamic Republic of Iran
| | - Hoseinali Mahgoli
- Dental Research Center, Dentistry Research Institute and Department of Prosthodontics, School of Dentistry Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Ahmad Rohanian
- Dental Research Center, Dentistry Research Institute and Department of Prosthodontics, School of Dentistry Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Safoura Ghodsi
- Dental Research Center, Dentistry Research Institute and Department of Prosthodontics, School of Dentistry Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran, Phone: +00989128450833, e-mail:
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Color match of a feldspathic ceramic CAD-CAM material for ultrathin laminate veneers as a function of substrate shade, restoration color, and thickness. J Prosthet Dent 2017; 119:455-460. [PMID: 28552290 DOI: 10.1016/j.prosdent.2017.02.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 02/20/2017] [Accepted: 02/21/2017] [Indexed: 11/21/2022]
Abstract
STATEMENT OF PROBLEM The final color of a ceramic restoration, especially an ultrathin veneer, is important, but selecting the correct shade is difficult because the substrate can affect the final color of the restoration. PURPOSE The purpose of this in vitro study was to investigate the effect of substrate shade and thickness on the final color of ultrathin laminate veneers milled from feldspathic ceramic and to present a straightforward methodology with which a clinician can visualize the effects of substrate color, ceramic thickness, and prefabricated computer-aided design and computer-aided manufacturing (CAD-CAM) block color on the final color of the restoration. MATERIAL AND METHODS All specimens were fabricated by slicing CAD-CAM feldspathic ceramic material with a precision cutter into 12×10-mm slices of approximately 0.35, 0.55, 0.75, and 1.55 mm in thickness with 10 different colors (0M1-1M1-1M2-2M1-2M2-2M3-3M1-3M2-3M3-4M1). As a background substrate, composite resin disks (12×10×2 mm) were fabricated with different shades (0M1 S, 1M1 S, 2M3 S, 3M2 S, 4M3 S, 5M3 S). The CIELab values of the polished surfaces of each specimen were measured on a background (white or simulated foundation) with a spectrophotometer by a single experienced operator, and color differences (ΔE) were calculated. Mean ±SD values were calculated and subjected to ANOVA with 2 variables (substrate and ceramic color) (α=.05). RESULTS Combinations of a lighter substrate shade and a lighter value ceramic restoration and of a darker substrate shade and darker value ceramic restoration only changed the final color of the restoration minimally. CONCLUSIONS The final color of a dental restoration is affected by the thickness of the restoration, the substrate color, and the ceramic color. Lighter and darker substrate colors show more color changes, and thin veneers cannot mask the substrate color.
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Perroni AP, Bergoli CD, Dos Santos MBF, Moraes RR, Boscato N. Spectrophotometric analysis of clinical factors related to the color of ceramic restorations: A pilot study. J Prosthet Dent 2017; 118:611-616. [PMID: 28385444 DOI: 10.1016/j.prosdent.2016.12.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 12/30/2016] [Accepted: 12/30/2016] [Indexed: 11/18/2022]
Abstract
STATEMENT OF PROBLEM Shade matching natural teeth with ceramic restorations is still an esthetic, clinical challenge. PURPOSE The purpose of this prospective clinical study was to evaluate the influence of color-related factors on the color variation of ceramic restorations based on spectrophotometric analysis. MATERIAL AND METHODS Color records were obtained from 11 participants who received 38 lithium disilicate restorations. CIELab color coordinates were measured with a spectrophotometer on the ceramic restoration, tooth (baseline), prepared tooth, and luted ceramics. Color variation (ΔE00) was calculated for each variable (luting agent and restoration type, tooth substrate shade, ceramic thickness, and translucency parameters) measured at baseline on the prepared tooth and after cementation of the restorations. Confidence intervals (CI) for the means (95% CI) were calculated, and the ΔE00 values and CIELab individual color coordinates were compared for each pair of variable by using the Student t test or Welch test (α=.05). RESULTS Greater color variation values were observed between measurements obtained on the prepared tooth and luted restoration. The lower ΔE00 values were observed over darker tooth substrate measured at baseline and after luting (P=.007). CONCLUSIONS The 3 conditions evaluated presented clinically visible color differences, highlighting the importance of clinical evaluations on the visual color acceptability limits for restorations, which are usually defined in laboratory studies. The lithium disilicate ceramic showed lower masking ability over darker tooth substrate, whereas the coordinates L*, a*, and b* were cementation-dependent.
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Affiliation(s)
- Ana Paula Perroni
- Doctoral student, Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - César D Bergoli
- Professor, Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | | | - Rafael R Moraes
- Professor, Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - Noéli Boscato
- Professor, Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil.
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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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Jurišić S, Jurišić G, Zlatarić DK. In Vitro Evaluation and Comparison of the Translucency of Two Different All-Ceramic Systems. Acta Stomatol Croat 2016; 49:195-203. [PMID: 27688403 DOI: 10.15644/asc49/3/1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES The aim of this study was to evaluate and compare the translucency of two different all-ceramic systems using Vita Easyshade digital shade matching device in an in vitro model. MATERIALS AND METHODS Translucency of lithium disilicate glass-ceramic (IPS e.max Press) and zirconia all-ceramic system (Ceramill ZI) were evaluated and compared. A total of 5 square-shaped specimens with 0.5 mm thickness were fabricated from each ceramic system in A1 shade according to Vitapan Classical shade tab. Specimens were then veneered and glazed with corresponding veneer ceramics recommended by each system manufacturer and the total thickness was set to 1.5 mm. Translucency was evaluated using VITA Easyshade in two stages: before and after veneering and glazing on black and white background. Translucency parameter (TP) was calculated. A one-way ANOVA and Bonferonni tests were used when appropriate (α=0.05). RESULTS Lithium disilicate glass-ceramic was significantly more translucent than the zirconia system in both stages (P<0.05). Translucency of all specimens was significantly decreased after veneering and glazing in both all-ceramic systems (P<0.05). CONCLUSION The translucency of two different dental ceramics was significantly influenced by both material and stages of preparation. Within the limitations of the experiment, these results can be valuable and help the clinician to make appropriate esthetic decisions.
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Affiliation(s)
- Sanja Jurišić
- - Dental polyclinic Jurišić, Kneza Branimira 11, 88000 Mostar, Bosnia and Herzegovina
| | - Gordan Jurišić
- - Dental polyclinic Jurišić, Kneza Branimira 11, 88000 Mostar, Bosnia and Herzegovina
| | - Dubravka Knezović Zlatarić
- Department of Removable Prosthodontics, School of Dental Medicine, University of Zagreb, Gundulićeva 5, 10000 Zagreb, Croatia
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Pires LA, Novais PMR, Araújo VD, Pegoraro LF. Effects of the type and thickness of ceramic, substrate, and cement on the optical color of a lithium disilicate ceramic. J Prosthet Dent 2016; 117:144-149. [PMID: 27460330 DOI: 10.1016/j.prosdent.2016.04.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 04/07/2016] [Accepted: 04/07/2016] [Indexed: 10/21/2022]
Abstract
STATEMENT OF PROBLEM Reproducing the characteristics of natural teeth in ceramic crowns remains a complex and difficult process. PURPOSE The purpose of this in vitro study was to evaluate the effect of the substrate, cement, type, and thickness of the ceramic on the resulting color of a lithium disilicate ceramic. MATERIAL AND METHODS Forty ceramic disks were prepared from IPS e.max Press LT (low translucency) and HO (high opacity) in 2 different thicknesses (1.5 and 2 mm). The LT groups were composed of monolithic ceramic disks, and the HO groups were composed of disks fabricated with a 0.5-mm thickness combined with a 1- or 1.5-mm veneering ceramic thickness. Disks made of composite resin (R) and alloy (A) were used as substrate structures. The resin cement used was Variolink II. Color was measured with a spectrophotometer and expressed in CIELAB coordinates. Color differences (ΔE) were calculated. The data were analyzed with ANOVA and the Tukey HSD test (α=.05). RESULTS When the ΔE of ceramic disks with both substrates, with and without cement, were compared, the lowest value (3) was obtained for ceramic HO with a 2-mm thickness/alloy substrate/without cement; the highest value (10) was obtained for ceramic LT with a1.5-mm thickness/alloy substrate/with cement. This difference was statistically significant. When the effect of cement on the ΔE of ceramics in both substrates was compared, the lowest value (1.1) occurred with ceramic HO with a 1.5-mm thickness/resin substrate, and the highest was observed for ceramic LT with a 1.5-mm thickness/alloy substrate (6.4). This difference was statistically significant. CONCLUSIONS The substrate color, type and thickness of ceramic, and presence of the cement significantly influenced the resulting optical color. The ΔE values of cemented HO ceramics were lower than that of the LT ceramic.
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Affiliation(s)
- Laís A Pires
- Doctoral student, Department of Prosthodontics, University of São Paulo, Bauru School of Dentistry, São Paulo, Brazil.
| | - Pollyanna M R Novais
- Professor, Faculty of Professional Masters in Dentistry, University of Fortaleza, Ceará, Brazil
| | - Vinícius D Araújo
- Professor, University Federal Rural of Pernambuco, Academic Unit of the Cabo of Santo Agostinho, Pernambuco, Brazil
| | - Luiz F Pegoraro
- Professor, Department of Prosthodontics, University of São Paulo, Bauru School of Dentistry, São Paulo, Brazil
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Silami FDJ, Tonani R, Alandia-Román CC, Pires-de-Souza FDCP. Influence of Different Types of Resin Luting Agents on Color Stability of Ceramic Laminate Veneers Subjected to Accelerated Artificial Aging. Braz Dent J 2016; 27:95-100. [DOI: 10.1590/0103-6440201600348] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 11/24/2015] [Indexed: 11/22/2022] Open
Abstract
Abstract The aim of this study was to evaluate the influence of accelerated aging (AAA) on the color stability of resin cements for bonding ceramic laminate veneers of different thicknesses. The occlusal surfaces of 80 healthy human molars were flattened. Ceramic laminate veneers (IPS e-max Ceram) of two thicknesses (0.5 and 1.0 mm) were bonded with three types of luting agents: light-cured, conventional dual and self-adhesive dual cement. Teeth without restorations and cement samples (0.5 mm) were used as control. After initial color evaluations, the samples were subjected to AAA for 580 h. After this, new color readouts were made, and the color stability (ΔE) and luminosity (ΔL) data were analyzed. The greatest color changes (p<0.05) occurred when 0.5 mm veneers were fixed with light-cured cement and the lowest when 1.0 mm veneers were fixed with conventional dual cement. There was no influence of the restoration thickness when the self-adhesive dual cement was used. When veneers were compared with the control groups, it was verified that the cement samples presented the greatest alterations (p<0.05) in comparison with both substrates and restored teeth. Therefore, it was concluded that the thickness of the restoration influences color and luminosity changes for conventional dual and light-cured cements. The changes in self-adhesive cement do not depend on restoration thickness.
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Gautam C, Joyner J, Gautam A, Rao J, Vajtai R. Zirconia based dental ceramics: structure, mechanical properties, biocompatibility and applications. Dalton Trans 2016; 45:19194-19215. [DOI: 10.1039/c6dt03484e] [Citation(s) in RCA: 159] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zirconia (ZrO2) based dental ceramics have been considered to be advantageous materials with adequate mechanical properties for the manufacturing of medical devices.
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Affiliation(s)
- Chandkiram Gautam
- Department of Material Science and Nano Engineering
- 6100 Main MS-325
- Rice University
- Houston
- USA
| | - Jarin Joyner
- Department of Material Science and Nano Engineering
- 6100 Main MS-325
- Rice University
- Houston
- USA
| | | | - Jitendra Rao
- Department of Prosthodontics
- Faculty of Dental Sciences
- King George Medical University
- Lucknow - 226003
- India
| | - Robert Vajtai
- Department of Material Science and Nano Engineering
- 6100 Main MS-325
- Rice University
- Houston
- USA
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TRAINI T, SINJARI B, PASCETTA R, SERAFINI N, PERFETTI G, TRISI P, CAPUTI S. The zirconia-reinforced lithium silicate ceramic: lights and shadows of a new material. Dent Mater J 2016; 35:748-755. [DOI: 10.4012/dmj.2016-041] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Tonino TRAINI
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara
| | - Bruna SINJARI
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara
| | | | - Nicola SERAFINI
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara
| | - Giorgio PERFETTI
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara
| | - Paolo TRISI
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara
| | - Sergio CAPUTI
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara
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Sedda M, Vichi A, Carrabba M, Capperucci A, Louca C, Ferrari M. Influence of coloring procedure on flexural resistance of zirconia blocks. J Prosthet Dent 2015; 114:98-102. [PMID: 25858219 DOI: 10.1016/j.prosdent.2015.02.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 02/07/2015] [Accepted: 02/09/2015] [Indexed: 10/23/2022]
Abstract
STATEMENT OF PROBLEM The white color of zirconia limits the possibility of a natural-looking restoration. Industrially precolored blocks and green-stage coloring liquids are used to obtain shaded zirconia. Several authors have reported that pigments may negatively affect the mechanical characteristics of the material. PURPOSE The purpose of this in vitro study was to investigate the effect of a recently marketed coloring system on the flexural strength (σ), Weibull characteristic strength (σ0), and Weibull modulus (m) of a zirconia for computer-aided design/computer-aided manufacturing (CAD/CAM) systems. MATERIAL AND METHODS Noncolored white blocks (In-Ceram YZ), industrially precolored blocks (In-Ceram YZ col. LL1p), and green-stage infiltration-shaded blocks in 4 colors (In-Ceram YZ Coloring Liquids) were tested. Industrially precolored specimens (n = 30) were assigned to the PREC group. Noncolored specimens were divided into 5 groups (n = 30). Group CNTR was not treated (control). Groups INF-N, INF-L, INF-M, and INF-I were subject to green-stage infiltration (neutral, light, medium, and intense, respectively). Specimens were tested in a 3-point bending apparatus following ISO 6872:2008 specifications. Data were analyzed by 1-way ANOVA. RESULTS The calculated flexural strengths (MPa) were CNTR 1232.56 ± 103.91; PREC 1215.16 ± 141.42; INF-N 1280.72 ± 160.10; INF-L 1218.92 ± 78.63; INF-M 1153.71 ± 176.80; and INF-I 1248.46 ± 111.73. No statistically significant differences were found among the tested groups (P = .195). CONCLUSIONS Unlike what has been reported for other combinations of zirconia and coloring liquids, the coloring technique tested in the present study did not negatively influence the flexural characteristics of the tested zirconia.
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Affiliation(s)
- Maurizio Sedda
- Tutor, Department of Medical Biotechnologies, University of Siena, Siena, Italy.
| | - Alessandro Vichi
- Research Professor, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Michele Carrabba
- Tutor, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | | | - Chris Louca
- Senior Lecturer, Eastman CPD, UCL Eastman Dental Institute, London, United Kingdom
| | - Marco Ferrari
- Dean, Professor, Department of Medical Biotechnologies, University of Siena, Siena, Italy
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Awad D, Stawarczyk B, Liebermann A, Ilie N. Translucency of esthetic dental restorative CAD/CAM materials and composite resins with respect to thickness and surface roughness. J Prosthet Dent 2015; 113:534-40. [PMID: 25749093 DOI: 10.1016/j.prosdent.2014.12.003] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 12/12/2014] [Accepted: 12/16/2014] [Indexed: 11/30/2022]
Abstract
STATEMENT OF PROBLEM Little information is available about the translucency of monolithic CAD/CAM materials. PURPOSE The purpose of this study was to evaluate the translucency of restorative CAD/CAM materials and direct composite resins with respect to thickness and surface roughness. MATERIALS AND METHODS In total, 240 disk-shaped specimens (12×14×1 mm and 12×14×2 mm) of 3 different CAD/CAM glass ceramics (CELTRA Duo, IPS e.max CAD, IPS Empress CAD), a fine-structure feldspathic ceramic (VITA Mark II), a hybrid ceramic (VITA Enamic), a resin nanoceramic composite resin (LAVA Ultimate), an experimental (CAD/CAM nanohybrid composite resin), 2 interim materials (Telio CAD; VITA CAD-Temp), and 3 direct composite resins (Tetric EvoCeram; Filtek Supreme XTE; Tetric EvoCeram Bulk Fill) were fabricated (n=10). After 3 different surface pretreatments (polished, rough SiC P1200, or SiC P500), absolute translucency and surface roughness were measured using spectrophotometry and tactile profilometry. The influence of material type, thickness, and roughness on absolute translucency was analyzed using a multivariate analysis, 1-way ANOVA, and the Tukey HSD post hoc test (P<.05). Pearson correlations and statistical hypothesis tests were used to assess the results (P<.05). RESULTS The effect of all tested parameters was significant among the materials (P<.05). The greatest influence on the measured translucency was thickness (partial eta squared ηP²=.988), closely followed by material (.982), and the pretreatment method (.835). The surface roughness was strongly influenced by the pretreatment method (.975) and type of material (.941). CONCLUSION Thickness and surface roughness are major factors affecting the absolute translucency of adhesively luted restorations.
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Affiliation(s)
- Daniel Awad
- Dentist, Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Dental School, Ludwig-Maximilians University, Munich, Germany
| | - Bogna Stawarczyk
- Senior Materials Scientist, Department of Prosthodontics, Dental School, Ludwig-Maximilians University, Munich, Germany.
| | - Anja Liebermann
- Assistant Professor, Department of Prosthodontics, Dental School, Ludwig-Maximilians University, Munich, Germany
| | - Nicoleta Ilie
- Senior Materials Scientist, Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Dental School, Ludwig-Maximilians University, Munich, Germany
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Al Hamad KQ, Qadan MM, Al Wahadni AM. Spectrophotometric Analysis of the Influence of Metal Alloy Choice, Opaque Thickness, and Repeated Firing on the Shade of Metal Ceramic Restorations. J ESTHET RESTOR DENT 2015; 28 Suppl 1:S56-67. [DOI: 10.1111/jerd.12132] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Khaled Q. Al Hamad
- Department of Prosthodontics; Faculty of Dentistry; Jordan University of Science and Technology; Irbid Jordan
| | - Mohammad M. Qadan
- Department of Prosthodontics; Faculty of Dentistry; Jordan University of Science and Technology; Irbid Jordan
| | - Ahed M. Al Wahadni
- Department of Prosthodontics; Faculty of Dentistry; Jordan University of Science and Technology; Irbid Jordan
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Dikicier S, Ayyildiz S, Ozen J, Sipahi C. Effect of varying core thicknesses and artificial aging on the color difference of different all-ceramic materials. Acta Odontol Scand 2014; 72:623-9. [PMID: 24773131 DOI: 10.3109/00016357.2013.879997] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Clinicians should reserve all-ceramics with high translucency for clinical applications in which high-level esthetics are required. Furthermore, it is unclear whether a correlation exists between core thickness and color change. The aim of this study was to examine the effects of different core thicknesses and artificial aging on the color stability of three all-ceramic systems. MATERIALS AND METHODS Ninety disc-shaped cores with different thicknesses (0.5 mm, 0.8 mm and 1.0 mm) were prepared from three all-ceramic systems, In-Ceram Alumina (IC), IPS e.max Press (EM) and Katana (K). The colors of the samples were measured with a spectrophotometer and the color parameters (L*, a*, b*, ΔE) were calculated according to the CIE L*a*b* (Commission Internationale de L'Eclairage) color system before and after aging. RESULTS The effects of aging on color parameters were statistically significant (p < 0.001), regardless of core thickness. For all systems, the CIE a* values increased as the thickness of the core increased. Conversely, such increases in core porcelain thickness were correlated with decreasing CIE L* and b* values. Core thickness had a statistically significant effect on color change among the groups. CONCLUSIONS Different core thicknesses (from 1.0-0.5 mm) and artificial aging affected color stability of the all-ceramic materials tested.
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Affiliation(s)
- Sibel Dikicier
- Department of Prosthodontics, Corlu Military Hospital , Tekirdag , Turkey
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Turgut S, Bagis B, Ayaz EA, Korkmaz FM, Ulusoy KU, Bagis YH. How will surface treatments affect the translucency of porcelain laminate veneers? J Adv Prosthodont 2014; 6:8-13. [PMID: 24605200 PMCID: PMC3942531 DOI: 10.4047/jap.2014.6.1.8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 10/27/2013] [Accepted: 12/30/2013] [Indexed: 12/01/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate whether surface treatments affect the translucency of laminate veneers with different shades and thicknesses. MATERIALS AND METHODS A total of 224 disc-shaped ceramic veneers were prepared from A1, A3, HT (High Translucent) and HO (High Opaque) shades of IPS e.max Press (Ivoclar Vivadent) with 0.5 mm and 1.0 mm thicknesses. The ceramics were divided into four groups for surface treatments. Group C: no surface treatments; Group HF: etched with hydrofluoric acid; Group SB: sandblasted with 50-µm Al2O3; and Group L; irradiated with an Er;YAG laser. A translucent shade of resin cement (Rely X Veneer, 3M ESPE) was chosen for cementation. The color values of the veneers were measured with a colorimeter and translucency parameter (TP) values were calculated. A three-way ANOVA with interactions for TP values was performed and Bonferroni tests were used when appropriate (α=0.05). RESULTS There were significant interactions between the surface treatments, ceramic shades and thicknesses (P=.001). For the 0.5-mm-thick specimens there were significant differences after the SB and L treatments. There was no significant difference between the HF and C treatments for any shades or thicknesses (P>.05). For the 1-mm-thick ceramics, there was only a significant difference between the L and C treatments for the HT shade ceramics (P=.01). There were also significant differences between the SB and C treatments except not for the HO shades (P=.768). CONCLUSION The SB and L treatments caused laminate veneers to become more opaque; however, HF treatment did not affect the TP values. When the laminate veneers were thinner, both the shade of the ceramic and the SB and laser treatments had a greater effect on the TP values.
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Affiliation(s)
- Sedanur Turgut
- Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Bora Bagis
- Department of Prosthodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey
| | - Elif Aydogan Ayaz
- Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Fatih Mehmet Korkmaz
- Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Kıvanç Utku Ulusoy
- Department of Prosthodontics, Faculty of Dentistry, Suleyman Demirel University, Isparta, Turkey
| | - Yildirim Hakan Bagis
- Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, Ankara, Turkey
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Niu E, Agustin M, Douglas RD. Color match of machinable lithium disilicate ceramics: Effects of cement color and thickness. J Prosthet Dent 2014; 111:42-50. [DOI: 10.1016/j.prosdent.2013.09.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Niu E, Agustin M, Douglas RD. Color match of machinable lithium disilicate ceramics: Effects of foundation restoration. J Prosthet Dent 2013; 110:501-9. [DOI: 10.1016/j.prosdent.2013.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Turgut S, Bagis B, Ayaz EA. Achieving the desired colour in discoloured teeth, using leucite-based CAD-CAM laminate systems. J Dent 2013; 42:68-74. [PMID: 24239927 DOI: 10.1016/j.jdent.2013.10.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 10/29/2013] [Accepted: 10/30/2013] [Indexed: 10/26/2022] Open
Abstract
OBJECTIVES To evaluate the cumulative effect of the abutment tooth and resin cement colour on the resultant optical properties of porcelain laminate veneers (PLVs) fabricated with leucite-based CAD/CAM blocks with different shades and thicknesses. METHODS A total of 224 ceramic specimens were prepared from the IPS Empress CAD with four different shades of HT-A1, LT-A1, MT-A1 and Bl-1. Resin composite discs were prepared with shade A3.5. For the cementation, 4 different shades of light-cure resin cements were chosen. L*, a*, and b* values, as well as the chroma (C) and hue (h) values of each cemented ceramic and the A1 shade table, were recorded. RESULTS L*, Cab* and hab* values of the cemented ceramics were influenced by ceramic shade, ceramic thickness, cement shade, and interaction terms of the three variables. There were significant differences between the 1-mm-thick ceramic veneers that exhibited higher L* and lower Cab* values compared with veneers that were 0.5mm in thickness. Using the Tr shade cement resulted in lower L* and higher Cab* values for all thicknesses and ceramic shades, whereas the WO shade cement resulted in higher values. CONCLUSIONS The selected colour of a laminate restoration is significantly affected by the ceramic shade, ceramic thickness and resin cement shade. Using the WO shade resin cement seems to be more effective in masking the discoloured abutment tooth. Clinicians should also select the translucency level of the ceramic block with the shade when a leucite-based CAD/CAM system is chosen to treat a discoloured tooth.
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Affiliation(s)
- Sedanur Turgut
- Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Bora Bagis
- Department of Prosthodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey.
| | - Elif Aydogan Ayaz
- Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
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Kürklü D, Azer SS, Yilmaz B, Johnston WM. Porcelain thickness and cement shade effects on the colour and translucency of porcelain veneering materials. J Dent 2013; 41:1043-50. [DOI: 10.1016/j.jdent.2013.08.017] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 08/20/2013] [Accepted: 08/22/2013] [Indexed: 11/30/2022] Open
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Turgut S, Bagis B, Turkaslan SS, Bagis YH. Effect of ultraviolet aging on translucency of resin-cemented ceramic veneers: an in vitro study. J Prosthodont 2013; 23:39-44. [PMID: 23725214 DOI: 10.1111/jopr.12061] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2013] [Indexed: 11/30/2022] Open
Abstract
PURPOSE The aim of this in vitro study was to evaluate the translucency of ceramic veneers cemented with light- or dual-cured resin cements after accelerated aging. MATERIALS AND METHODS A total of 392 specimens were made of shade A1 with 0.5- and 1.0-mm thickness. Light-cured RelyX Veneer and dual-cured Maxcem Elite and Variolink II resin cements were applied on the porcelain discs with a thickness of 0.1 mm. Translucency parameter (TP) values of the ceramic veneers after cementation and UV aging test were evaluated. Statistical analyses were done with ANOVA and Tukey's tests and paired sample t-test (p < 0.05). RESULTS All the resin cements affected the TP values of 0.5-mm-thick ceramic, while RelyX Veneer Tr (TP = 11.15; p = 0.608), Variolink II Tr (TP = 10.98; p = 0.55), and Maxcem Clear (TP = 11.81; p = 0.702) did not affect the translucency of 1-mm-thick ceramics (TP = 11.38). The aging process affected TP values of both ceramics and cemented ceramics, as the TP values decreased after aging. Among the TP values of opaque shade resin cements, there were significant differences between the "ceramic," "ceramic + RelyX Veneer WO," "ceramic + Variolink II WO," and "ceramic + Maxcem WO" variables for both 0.5 and 1 mm thicknesses (p < 0.05). There were no significant differences between "ceramic," "ceramic + RelyX Veneer Tr," "ceramic + Variolink II Tr," and "ceramic + Maxcem Clear" variables at 0.5 mm thickness, and there were no significant differences between "ceramic," "ceramic + RelyX Veneer Tr," and "ceramic + Variolink II Tr" variables after aging (p > 0.05). CONCLUSIONS The TP of the same color of resin cements varied related to the type or brand. Aging caused both the ceramics and cemented ceramics to become more opaque.
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Affiliation(s)
- Sedanur Turgut
- Department of Prosthodontics, Karadeniz Technical University, Faculty of Dentistry, Trabzon, Turkey
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Monaco C, Tucci A, Esposito L, Scotti R. Microstructural changes produced by abrading Y-TZP in presintered and sintered conditions. J Dent 2013; 41:121-6. [DOI: 10.1016/j.jdent.2012.06.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2011] [Revised: 06/29/2012] [Accepted: 06/30/2012] [Indexed: 10/28/2022] Open
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Effect of alloy recasting on the color of opaque porcelain applied on different dental alloy systems. J Prosthet Dent 2012; 108:362-9. [PMID: 23217468 DOI: 10.1016/s0022-3913(12)60193-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM The effect of different proportions of recast dental alloys on the color of overlying opaque porcelain (OP) is unknown. PURPOSE The purpose of this study was to compare the color of OP applied on 2 different proportions (50% and 100%) of recast alloys with the color of commercially available shade tabs of OP. MATERIAL AND METHODS Six different metal alloy systems (2 base: Metalloy CC, Cr-Co [B-MCC]; Heraenium NA, Ni-Cr [B-HNA]; 3 noble: Cerapall 2, Pd-Au [N-CP2]; Triumph, Pd-Ag [N-T]; V-Deltaloy, Au-Pd [N-VD]; and 1 high-noble: V-Gnathos Plus, Au-Pt [HN-GP]) were selected for the fabrication of disk-shaped specimens (10 mm in diameter, 1 mm in thickness). Each alloy was divided into 2 subgroups: 50% new alloy with 50% recast alloy (n=3) and 100% recast alloy (n=3). OP (B1) was applied (0.1 mm) to all specimens. The color coordinates (L*, a*, b*) of each specimen and the corresponding commercially available OP shade tab (control) were measured with a spectroradiometer, and color differences between specimens and control group were calculated. Data were statistically analyzed (2-way ANOVA, Ryan-Einot-Gabriel-Welsch multiple range test, α=.05). RESULTS For each alloy, ΔL*(L(control)(-)L(recastalloy)) values for the 2 subgroups were not statistically different from each other. The Δa* and Δb* of different proportions of N-CP2, B-HNA, N-VD, and HN-GP were not statistically different within the alloys. However, the a* values of 100% recast N-T and B-MCC were significantly closer to the a* values of the control group, and the b* values of 50% recast B-MCC were significantly closer to the b* values of the control group (P<.05). Delta E(control-recast) alloy values for different proportions of alloys were not statistically different. However, color differences did not meet the criterion of clinical acceptability (ΔE=3.46). CONCLUSIONS According to the results of this study, the different proportions (50% and 100%) of recast alloys used have similar effects on the color of OP. Differences between the final color of OP on the recast alloys used and the color of OP shade guide tabs did not meet the criterion of clinical acceptability considered in this study.
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Taira Y, Sakai M, Sawase T. Effects of primer containing silane and thiophosphate monomers on bonding resin to a leucite-reinforced ceramic. J Dent 2012; 40:353-8. [DOI: 10.1016/j.jdent.2011.12.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Revised: 11/30/2011] [Accepted: 12/01/2011] [Indexed: 11/29/2022] Open
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Fracture resistance and marginal discrepancy of porcelain laminate veneers influenced by preparation design and restorative material in vitro. J Dent 2012; 40:202-9. [DOI: 10.1016/j.jdent.2011.12.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 12/05/2011] [Accepted: 12/06/2011] [Indexed: 11/24/2022] Open
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Hooshmand T, Rostami G, Behroozibakhsh M, Fatemi M, Keshvad A, van Noort R. Interfacial fracture toughness of different resin cements bonded to a lithium disilicate glass ceramic. J Dent 2012; 40:139-45. [DOI: 10.1016/j.jdent.2011.12.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Revised: 12/03/2011] [Accepted: 12/05/2011] [Indexed: 11/29/2022] Open
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Azer SS, Rosenstiel SF, Seghi RR, Johnston WM. Effect of substrate shades on the color of ceramic laminate veneers. J Prosthet Dent 2012; 106:179-83. [PMID: 21889004 DOI: 10.1016/s0022-3913(11)60117-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
STATEMENT OF PROBLEM Ceramic laminate veneers are generally fabricated with varying thicknesses ranging from 0.3 to 1 mm, depending on the need to mask discolored teeth or slightly correct the contour of malpositioned teeth. Clinical color reproduction poses a challenge because of color interaction with the underlying substrate, whether tooth structure or esthetic restorative material. PURPOSE The purpose of this in vitro investigation was to measure the effect of color change resulting from applying 2 shades of ceramic material, translucent (T1) and opaque (O2), to 2 shades of composite resin substrate material, light (A3) and dark (C4), on the overall color of ceramic laminates. MATERIAL AND METHODS Forty disks were fabricated. Twenty disks (15 × 0.5 mm) were cut from pressed ceramic, 10 disks for each shade (translucent and opaque). Additionally, 20 disks (15 × 4.0 mm) were fabricated from light-polymerized composite resin material, 10 disks for each shade (light and dark). The ceramic disks were bonded to the composite resin disks with clear resin cement. The specimen combinations were divided into 4 groups (n=5). Color measurements were done with a colorimeter (Minolta Chroma Meter CR-200b) configured with diffuse illumination/0-degree viewing geometry. Mean CIE lightness (L*), chroma (C*(ab)), and hue angle (h(ab)) values were obtained. A 2-way analysis of variance (ANOVA) was used to compare the means and standard deviations between the different color combinations (α=.05), followed by Tukey's HSD post hoc test for significant interactions. RESULTS The 2-way ANOVA showed significant differences (P<.001) in L*, C*(ab), and h(ab) for a change in the composite resin substrate, regardless of the ceramic material shade. There was significant color change from dark to light substrate (P=.044). The mean h(ab) (SD) of dark substrate/opaque veneer was 89.62 (1.5), while the mean h(ab) of light substrate/translucent veneer was 81.23 (1.7). CONCLUSIONS Within the limitations of this study, the selected color of a 0.5 mm ceramic laminate veneer was significantly affected by the change in color of the supporting substrate.
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Affiliation(s)
- Shereen S Azer
- Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio 43210-1267, USA.
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Vichi A, Louca C, Corciolani G, Ferrari M. Color related to ceramic and zirconia restorations: A review. Dent Mater 2011; 27:97-108. [PMID: 21122905 DOI: 10.1016/j.dental.2010.10.018] [Citation(s) in RCA: 165] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Accepted: 10/22/2010] [Indexed: 11/28/2022]
Affiliation(s)
- Alessandro Vichi
- Department of Dental Materials and Fixed Prosthodontics, School of Dentistry, University of Siena, Siena, Italy.
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