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Tolba ZO, Hassanien EEY. Translucency and colour masking ability of hybrid CAD/CAM materials with different thicknesses: in vitro study. BDJ Open 2024; 10:63. [PMID: 39103323 DOI: 10.1038/s41405-024-00245-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 06/20/2024] [Accepted: 07/10/2024] [Indexed: 08/07/2024] Open
Abstract
OBJECTIVE To evaluate effect of material thickness and translucency of two different hybrid CAD/CAM materials on their masking ability. MATERIALS AND METHODS 40 rectangular-shaped specimens (12 × 14 mm) were obtained from Vita Enamic and Grandio blocks at 0.5 and 1 mm-thick (n = 10/group). Colour parameters of specimens were measured on PMMA tooth-coloured replica backgrounds (A2, C4) and black, white backings using dental spectrophotometer. Translucency parameter (TP) and masking ability (∆E00) values of tested materials with 0.5, and 1 mm thicknesses were calculated. Quantitative variables were compared between groups using student t-test. RESULTS TP and ∆E00 significantly decreased as thickness of tested materials increased. Grandio showed significantly higher TP values. There were significantly lower ΔE00 values for Vita Enamic compared to Grandio at 1 mm thickness and inversely insignificant at 0.5 mm. The 0.5 mm-thick ∆E00 of tested materials was above clinical acceptability threshold, whereas, 1 mm-thick did not exceed showing better masking properties. CONCLUSIONS Thickness is more effective for colour masking than translucency. In thin thickness, the masking ability is less effective, irrespective of tested materials. Translucency of tested materials was affected by their composition. Both hybrid CAD/CAM materials are promising alternatives for masking dark discolouration at 1 mm-thick.
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Affiliation(s)
- Zeinab Omar Tolba
- Lecturer, Conservative Dentistry Department, Faculty of Dentistry, Cairo University, Cairo, Egypt.
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Chen Z, Zhang M, Zhang R, Hao P. Effect of the coloring liquid shade and dipping time on the color, transparency, and flexural strength of monolithic zirconia. J Prosthet Dent 2024; 132:229.e1-229.e8. [PMID: 38604904 DOI: 10.1016/j.prosdent.2024.03.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 03/04/2024] [Accepted: 03/05/2024] [Indexed: 04/13/2024]
Abstract
STATEMENT OF PROBLEM The impact of different coloring liquid shades and dipping times on the color, transparency, and flexural strength of monolithic zirconia ceramics is unclear. PURPOSE The purpose of this in vitro study was to evaluate the effects of different coloring liquid shades (A2, 3M2, and 5M2) and dipping times (no dipping, 30 seconds, 60 seconds, and 90 seconds) on the color difference (ΔE00), relative translucency parameter (ΔRTP00), and 3-point flexural strength (σ) of monolithic zirconia ceramics. MATERIAL AND METHODS Yttria-stabilized zirconia (3Y-TZP, 3 mol%) was cut into Ø16×1.2-mm plates (n=10) and 25×4×1.2-mm bars (n=15), which were colored using 3 shades of coloring liquid at 4 dipping times. Color coordinates were measured on a gray background by using a digital spectrophotometer with an integrating sphere attachment. The color and translucency differences were evaluated using 50:50% perceptibility (PT00 and TPT00) and acceptability (AT00 and TAT00) thresholds. The 3-point flexural strengths of the bar-shaped specimens were measured using a universal testing machine and analyzed using the Weibull distribution to calculate the Weibull modulus (m) and characteristic fracture strength (σ0). The data were analyzed with the 2-way ANOVA, Kruskal-Wallis, and LSD post hoc tests (α=.05). RESULTS Both shade and dipping time significantly affected the color and translucency of monolithic zirconia (P<.001). The ΔE00 was above the PT00 for all groups, with only 3M2-90 and A2-60 being below the AT00. The main cause of color differences was the difference in lightness. Only A2 showed ΔRTP00 below the TPT00 (A2-30 (ΔRTP00=0.26), A2-60 (ΔRTP00=0.29), and A2-90 (ΔRTP00=0.46)). All experimental groups showed translucency differences below TAT00. In addition, only the dipping time had a significant effect on the flexural strength of zirconia (P<.001). CONCLUSIONS The optical properties of monolithic zirconia ceramics were affected by the shade and dipping time of the coloring liquid. The mismatch in lightness was the main reason for the color difference. The dipping time affects the flexural strength of monolithic zirconia, whereas the shade of the coloring liquid did not seem to influence flexural strength.
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Affiliation(s)
- Zijie Chen
- Graduate student, Dental Technology, School of Stomatology, Binzhou Medical University, Yantai, PR China
| | - Mengmeng Zhang
- Graduate student, Dental Technology, School of Stomatology, Binzhou Medical University, Yantai, PR China
| | - Rimei Zhang
- Graduate student, Yantai Stomatological Hospital of Binzhou Medical University, Yantai, PR China
| | - Pengjie Hao
- Associate Professor, Department of Prosthodontics, Yantai Stomatological Hospital of Binzhou Medical University, Yantai, PR China.
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Nagai T, Alfaraj A, Chu TMG, Yang CC, Lin WS. Color stability of CAD-CAM hybrid ceramic materials following immersion in artificial saliva and wine. J Prosthodont 2024. [PMID: 38742795 DOI: 10.1111/jopr.13868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 04/21/2024] [Indexed: 05/16/2024] Open
Abstract
PURPOSE To examine the color stability of 3D-printed and milled, interim, and definitive, restorative materials after immersion in artificial saliva and wine for 1, 3, and 6 months. MATERIAL AND METHODS The study used a 2 × 5 factorial design with 10 subgroups, including 2 immersion liquids (artificial saliva and wine) and 5 manufacturing technology and restorative material combinations (n = 10). Color measurements were taken using a contact-type digital spectrophotometer (CM-2600d Spectrophotometer; Konica Minolta Healthcare Americas Inc) before immersion and at 1 month (T1), 3 months (T3), and 6 months (T6) after immersion. The CIE2000 system was used to calculate quantitative measurements of color differences in ΔE00, and comparisons were made to the acceptability threshold (AT) and perceptibility threshold (PT). Repeated measures of ANOVA (α = 0.05) were used to compare differences in color changes between manufacturing technology/restorative material-immersion liquid combinations at T1, T3, and T6. RESULTS To compare the effect of immersion liquid and time on the manufacturing technology/restorative material groups, the ΔE00 values were compared to the PT of 0.8 and the AT of 1.8. Wine caused significant color changes in ΔE00 values beyond the PT and AT values in all groups at all time intervals, except for the AT value of milled definitive crowns (hybrid nano-ceramic material). Wine immersion caused significant ΔE00 for all manufacturing technology/restorative material groups at all time intervals (1 month, 3 months, and 6 months) when compared to artificial saliva immersion (all p < 0.001). CONCLUSION Upon exposure to artificial saliva, 80%-100% of samples from all groups remained within the acceptable and perceptible color change thresholds. The wine had significant chromogenic effects on all tested restorative materials, however, the milled definitive crowns (hybrid nano-ceramic material) showed the greatest color stability. For patients with heavy wine consumption, 3D-printed definitive crowns (hybrid ceramic-filled material) may show discoloration exceeding acceptable and perceptible color change limits.
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Affiliation(s)
- Toshiki Nagai
- Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Amal Alfaraj
- Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
- Department of Prosthodontics, King Faisal University, School of Dentistry, Al Ahsa, Saudi Arabia
| | - Tien-Min G Chu
- Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Chao-Chieh Yang
- Advanced Education Program in Prosthodontics, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Wei-Shao Lin
- Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
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Pecho OE, Benetti P, Ruiz-López J, Furini GP, Tejada-Casado M, Pérez MM. Optical properties of dental zirconia, bovine dentin, and enamel-dentin structures. J ESTHET RESTOR DENT 2024; 36:511-519. [PMID: 38059691 DOI: 10.1111/jerd.13178] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 10/25/2023] [Accepted: 11/20/2023] [Indexed: 12/08/2023]
Abstract
OBJECTIVE To evaluate the optical properties and the relative translucency parameter of Ceramill ZI White (3Y-TZP) and Ceramill Zolid FX White (5Y-PSZ) zirconia ceramic systems and compare them with those of the bovine dentin and enamel/dentin structures. MATERIALS AND METHODS 3Y-TZP and 5Y-PSZ zirconia ceramic systems were evaluated. A 0.5-mm-thick 3Y-TZP (3Y-NC.5), 0.5-mm-thick (5Y-NC.5), and 1.4-mm-thick (5Y-C.14) were used. A 0.5-mm-thick dentin specimens and 1.4-mm-thick enamel/dentin specimens (n = 5) were obtained from anterior bovine maxillary teeth. Scattering, absorption, transmittance, and albedo coefficient were calculated using Kubelka-Munk's model. Data were statistically analyzed using Kruskal-Wallis and Mann-Whitney tests (p < 0.001), and goodness-of-fit coefficient (GFC). Relative translucency parameter differences were evaluated using translucency thresholds. RESULTS Reflectance, scattering, absorption, and transmittance properties were wavelength dependent. Good matches (GFC ≥ 0.999) in spectral reflectance were observed between 0.5-mm-thick dentin and 1.4-mm-thick enamel/dentin, and 3Y-NC.5 and 5Y-NC.5. Scattering was the main optical extinction process during light interaction with zirconia and dental structures, as indicated by albedo coefficient. Translucency differences were acceptable only for 3Y-NC.5 and the dentin structure, and 5Y-C.14 and the enamel/dentin structure. CONCLUSIONS Optical properties of 3Y-TZP and 5Y-PSZ dental zirconia differed from each other and from bovine dental structures. Nevertheless, 3Y-TZP showed similar relative translucency parameter to bovine dentin. CLINICAL SIGNIFICANCE To achieve the best esthetic results in restorative dentistry, it is crucial for clinicians to know about the optical properties of 3Y-TZP and 5Y-PSZ and to be able to compare these properties with those of dental structures.
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Affiliation(s)
- Oscar E Pecho
- Graduate Program in Dentistry, ATITUS Educação, Passo Fundo, RS, Brazil
| | - Paula Benetti
- Post-Graduate Program in Dentistry, Dental School, University of Passo Fundo, Passo Fundo, RS, Brazil
| | - Javier Ruiz-López
- Department of Optics, Faculty of Science, University of Granada Campus Fuentenueva, Edificio Mecenas, Granada, Spain
| | - Giordana P Furini
- Graduate Program in Dentistry, ATITUS Educação, Passo Fundo, RS, Brazil
| | - Maria Tejada-Casado
- Department of Optics, Faculty of Science, University of Granada Campus Fuentenueva, Edificio Mecenas, Granada, Spain
| | - María M Pérez
- Department of Optics, Faculty of Science, University of Granada Campus Fuentenueva, Edificio Mecenas, Granada, Spain
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Saláta J, Szabó F, Csuti P, Antal M, Márton P, Hermann P, Borbély J, Ábrám E. Effect of thickness, translucency, and substrates on the masking ability of a polymer-infiltrated ceramic-network material. J ESTHET RESTOR DENT 2023; 35:886-895. [PMID: 37335072 DOI: 10.1111/jerd.13071] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/23/2023] [Accepted: 06/03/2023] [Indexed: 06/21/2023]
Abstract
OBJECTIVE The aim of this in vitro study is to evaluate the masking ability of polymer-infiltrated ceramic-network materials (PICN) with different translucencies and thicknesses on multiple types of substrates. MATERIALS AND METHODS Ceramic samples were prepared of VITA ENAMIC blocks in two different translucencies (2M2-T, 2M2-HT) in a thickness range of 0.5-2.5 mm (±0.05 mm). Layered specimens were obtained using composite substrates in nine shades and transparent try-in paste. Spectral reflectance of specimens was measured using a Konica Minolta CM-3720d spectrophotometer and D65 standard illumination. CIEDE2000 color difference (ΔE00 ) between two samples was evaluated using 50%:50% perceptibility and acceptability thresholds. Specular component of the reflection was examined with Specular Component Excluded (SCE) and Included (SCI) settings. Statistical evaluation was performed by linear regression analysis, Kruskal-Wallis test, and multiplicative effect analysis. RESULTS An increase in thickness of 0.5 mm reduces ΔE00 of HT samples to 73.5%, of T samples to 60.5% (p < 0.0001). Five substrates with HT specimens, and three substrates with T specimens had significantly different results from average (p < 0.05). There is a significant difference between SCE and SCI data depending on the wavelength (p < 0.0001). CONCLUSIONS Masking ability of PICN materials is influenced by the thickness and translucency of the ceramic, and by the substrate. Reflection of the examined PICN material is characterized by both diffuse and specular reflection. CLINICAL SIGNIFICANCE Although PICN materials have been available on the market for 10 years now, there is a lack of information regarding their masking ability. Acquiring in-depth data and thereby practical experience of the factors affecting the esthetics of PICN materials is essential for creating perfectly lifelike restorations.
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Affiliation(s)
- József Saláta
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
- Károly Rácz Doctoral School of Clinical Medicine, Semmelweis University, Budapest, Hungary
| | - Ferenc Szabó
- LightingLab, Calibration Laboratory Ltd, Veszprém, Hungary
| | - Péter Csuti
- LightingLab, Calibration Laboratory Ltd, Veszprém, Hungary
| | - Melinda Antal
- Faculty of Dentistry, Semmelweis University, Budapest, Hungary
| | - Péter Márton
- Faculty of Dentistry, Semmelweis University, Budapest, Hungary
| | - Péter Hermann
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
| | - Judit Borbély
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
| | - Emese Ábrám
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
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Duveiller V, Clerc R, Eymard J, Salomon JP, Hébert M. Performance of two-flux and four-flux models for predicting the spectral reflectance and transmittance factors of flowable dental resin composites. Dent Mater 2023; 39:743. [PMID: 37394391 DOI: 10.1016/j.dental.2023.06.010] [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: 01/13/2023] [Revised: 05/19/2023] [Accepted: 06/14/2023] [Indexed: 07/04/2023]
Abstract
OBJECTIVE To evaluate the prediction accuracy of the Kubelka-Munk Reflectance Theory and other more innovative two-flux and four-flux models for predicting the reflectance and transmittance factors of two flowable dental resin composites of various thicknesses within clinically acceptable color difference. METHODS Cylindrical samples of Aura Easy Flow resin composite (Ae1, Ae2, Ae3, Ae4 shades) and Estelite Universal Flow SuperLow resin composite (A1, A2, A3, A3.5, A4, A5 shades) were prepared with thicknesses ranging from 0.3 mm to 1.8 mm. Their reflectance and transmittance factors were measured with a spectrophotometer based on an integrating sphere, and were also predicted by 3 different two-flux models and 2 different four-flux models. The accuracy of reflectance and transmittance factor predictions was assessed using the CIEDE2000 color distance metric and 50:50% acceptability and perceptibility threshold criteria. RESULTS Eymard's four-flux model is found to be the most accurate for predicting the spectral reflectance and transmittance factors, with 85% (resp. 100%) of all color deviations below the acceptability threshold, and below the perceptibility threshold for 40% (resp. 57%) of the samples with thickness ranging from 0.3 to 1.8 mm in reflectance (resp. transmittance) mode. The Kubelka-Munk Reflectance Theory is found to be the least accurate model for predicting the spectral reflectance and transmittance factors of dental resin of thickness ranging from 0.3 to 1.8 mm. SIGNIFICANCE Eymard's four-flux model enables to predict the color of slices of dental materials within acceptable color differences. Eymard's four-flux model's optical parameters thus describe light-matter interactions in dental materials more accurately than state of the art Kubelka-Munk Reflectance Theory.
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Affiliation(s)
- Vincent Duveiller
- Université Jean Monnet Saint-Etienne, CNRS, Institut d Optique Graduate School, Laboratoire Hubert Curien UMR 5516, F-42023 Saint-Etienne, France.
| | - Raphaël Clerc
- Université Jean Monnet Saint-Etienne, CNRS, Institut d Optique Graduate School, Laboratoire Hubert Curien UMR 5516, F-42023 Saint-Etienne, France
| | - Julien Eymard
- Université Jean Monnet Saint-Etienne, CNRS, Institut d Optique Graduate School, Laboratoire Hubert Curien UMR 5516, F-42023 Saint-Etienne, France
| | - Jean-Pierre Salomon
- Institut de Science des Matériaux de Mulhouse UMR 7361 CNRS, Université de Haute Alsace, France; Université de Strasbourg, France; Service de Chirurgie Maxillo-faciale, Stomatologie, Odontologie Hospitalière, au C.H.U. de Besançon, France; Département d'Odontologie de la Faculté de Médecine de Besançon. Département des Dispositifs Médicaux et des Biomatériaux Dentaires, France; EA 4662 « Nanomédecine, Radiologie, Thérapie », Université de Franche Comté, France; Oral Health and Sciences University (O.H.S.U.). The Department of Oral Rehabilitation and Biosciences. Division of Biomaterial and Biomedical Sciences, Portland, Oregon, USA; Department of Dental Materials and Prosthodontics, UNESP, Univ. Estadual Paulista, Araraquara Dental School, São Paulo State University, Brazil
| | - Mathieu Hébert
- Université Jean Monnet Saint-Etienne, CNRS, Institut d Optique Graduate School, Laboratoire Hubert Curien UMR 5516, F-42023 Saint-Etienne, France
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Ruiz-López J, Espinar C, Lucena C, de la Cruz Cardona J, Pulgar R, Pérez MM. Effect of thickness on color and translucency of a multi-color polymer-infiltrated ceramic-network material. J ESTHET RESTOR DENT 2023; 35:381-389. [PMID: 36533557 DOI: 10.1111/jerd.12952] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/14/2022] [Accepted: 07/18/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To evaluate the effect of thickness on color and translucency of a multi-color polymer-infiltrated ceramic-network (PICN) material. METHODS Specimens of 0.5, 1.0, 1.5 mm thicknesses were obtained by sectioning VITA ENAMIC® multiColor (E-MC) High Translucent CAD-CAM blocks (1M1-HT, 1M2-HT, 2M2-HT, 3M2-HT, and 4M2-HT). Spectral reflectance and color coordinates were measured on white and black backgrounds using a spectroradiometer, CIE D65 illuminant and CIE 45°/0° geometry. CIEDE2000 color and translucency differences (ΔE00 and ΔTP00 ) between thicknesses and adjacent layers were evaluated using their respective 50:50% perceptibility and acceptability thresholds (PT00 and AT00 ). RESULTS In general, ΔE00 between thicknesses for all shades and layers were above AT00 in general. Chroma decreased from cervical to incisal layers with statistically significant differences (p < 0.05), and ΔE00 between sequential layers were above PT00 , for all shades and thicknesses. TP00 decreased from 0.5 to 1.5 mm and increased from cervical to incisal layers for all shades with statically significant translucency differences (p < 0.05). In general, for all thicknesses, TPT00 < ΔTP00 < TAT00 for sequential layers. CONCLUSIONS The gradient in color and translucency of E-MC PICN material was influenced by the thickness of the CAD-CAM block. In addition, color and TP transition values between the layers depends on the thickness and shade. CLINICAL SIGNIFICANCE The effect of thickness must be taken into account by dental technicians and dentists when CAD-CAM multicolor PICN materials are used.
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Affiliation(s)
- Javier Ruiz-López
- Department of Optics, Faculty of Science, University of Granada, Spain.,Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Cristina Espinar
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain.,Department of Stomatology, Faculty of Dentistry, Colegio Máximo, University of Granada, Spain
| | - Cristina Lucena
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain.,Department of Stomatology, Faculty of Dentistry, Colegio Máximo, University of Granada, Spain
| | - Juan de la Cruz Cardona
- Department of Optics, Faculty of Science, University of Granada, Spain.,Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Rosa Pulgar
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain.,Department of Stomatology, Faculty of Dentistry, Colegio Máximo, University of Granada, Spain
| | - María M Pérez
- Department of Optics, Faculty of Science, University of Granada, Spain.,Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
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Tejada-Casado M, Ghinea R, Pérez MM, Ruiz-López J, Lübbe H, Herrera LJ. Development of Thickness-Dependent Predictive Methods for the Estimation of the CIEL*a*b* Color Coordinates of Monolithic and Layered Dental Resin Composites. MATERIALS (BASEL, SWITZERLAND) 2023; 16:761. [PMID: 36676498 PMCID: PMC9864169 DOI: 10.3390/ma16020761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 01/07/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
Usually, dentin and enamel shades are layered in dental restorations with the purpose of mimicking the natural appearance of teeth. The main objective of this study was to develop and assess accuracy of a color-prediction method for both monolithic and layered dental resin-based composites with varying shades and under different illuminants. A total of 15 different shades of VITAPAN Excell, VITAPAN Dentine and VITA Physiodens as well as VITA Enamel of five different thicknesses (0.5-2.5 mm range) were used to manufacture monolithic and layered samples. A non-contact spectroradiometer with CIE 45∘/0∘ geometry was used to measure the color of all samples over a standard ceramic black background. Second-degree polynomial regression was used as predictive method for CIE-L*a*b* color coordinates. Performance of predictive models was tested using the CIEDE2000 total color difference formula (ΔE00), while accuracy was evaluated by comparative assessment of ΔE00 with corresponding 50:50% acceptability (AT00) and perceptibly (PT00) thresholds for dentistry. A mean color difference between measured (real) and predicted color of ΔE00=1.71, with 62.86% of the color differences below AT00 and 28.57% below PT00, was registered for monolithic samples. For bi-layered samples, the mean color difference was roughly ΔE00=0.50, with generally 100% and more than 85% of the estimations below AT00 and PT00, respectively. The predictive method allowed highly accurate color estimations for both monolithic and layered dental resin-based composites with varying thicknesses and under different illuminations. These results could be useful to maximize the clinical success of dental restorations.
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Affiliation(s)
- Maria Tejada-Casado
- Department of Optics, Faculty of Science, Campus Fuentenueva, Edificio Mecenas, s/n., University of Granada, ibsGranada, 18071 Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18011 Granada, Spain
| | - Razvan Ghinea
- Department of Optics, Faculty of Science, Campus Fuentenueva, Edificio Mecenas, s/n., University of Granada, ibsGranada, 18071 Granada, Spain
- Department of Physics, Faculty of Sciences, University of Craiova, 13 AI Cuza Street, 200585 Craiova, Romania
| | - María M. Pérez
- Department of Optics, Faculty of Science, Campus Fuentenueva, Edificio Mecenas, s/n., University of Granada, ibsGranada, 18071 Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18011 Granada, Spain
| | - Javier Ruiz-López
- Department of Optics, Faculty of Science, Campus Fuentenueva, Edificio Mecenas, s/n., University of Granada, ibsGranada, 18071 Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18011 Granada, Spain
| | - Henning Lübbe
- Vita Zahnfabrik H. Rauter GmbH & Co. KG, Ballyweg 6, 79713 Bad-Säckingen, Germany
| | - Luis Javier Herrera
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18011 Granada, Spain
- Computer Architecture and Technology Department, University of Granada, 18071 Granada, Spain
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Lucena C, Benavides-Reyes C, Ruiz-López J, Tejada-Casado M, Pulgar R, Pérez MM. Relevant optical properties for gingiva-colored resin-based composites. J Dent 2022; 126:104316. [DOI: 10.1016/j.jdent.2022.104316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/18/2022] [Accepted: 09/30/2022] [Indexed: 10/31/2022] Open
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Shirani M, Emami M, Mosharraf R, Savabi O, Akhavankhaleghi M, Azadbakht K. Comparing the color match of monolithic CAD-CAM dental ceramics with the VITA Classical shade guide. J Prosthet Dent 2022:S0022-3913(22)00463-2. [PMID: 36115709 DOI: 10.1016/j.prosdent.2022.06.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 06/17/2022] [Accepted: 06/21/2022] [Indexed: 10/14/2022]
Abstract
STATEMENT OF PROBLEM Matching the shade selected and the final color of a ceramic restoration is challenging, and studies on matching monolithic ceramics to the shade selected are lacking. PURPOSE The purpose of this in vitro study was to compare the color match of monolithic lithium disilicate (LDS), zirconia-reinforced lithium silicate (ZLS), presintered zirconia-reinforced lithium silicate (PS-ZLS), polymer-infiltrated ceramic network (PICN), and multilayer zirconia with the 3 modes of the VITA Classical shade guide. MATERIAL AND METHODS This study was performed on 50 rectangular plates (14×12×1 mm) of 5 types of ceramics with A2 shade (n=10). Zirconia specimens were evaluated in 3 locations: incisal, medial, and cervical thirds. The color coordinates of the specimens of all 7 groups were measured on #3 and #8 Ivoclar Natural Die Color material by using a reflective spectrophotometer. The color coordinates of A2 VITA shade were measured in 5 modes: without backing placed in specimen holder, shade tab on the backgrounds #3 and #8, and 1-mm-thick shade tab on the backgrounds #3 and #8. The color difference of each specimen with 3 modes of A2 shade (without backing and on similar backgrounds) was calculated by using the ΔE00 formula, and comparison among groups was performed by using 2-way ANOVA and Tamhane post hoc tests. The comparison of ΔE00 between the values obtained from backgrounds #3 and #8 was performed by using the independent t test (α=.05). RESULTS In both backgrounds, statistically significant differences were found between the studied groups and VITA shade (P<.001). In most situations, the amount of color difference was lowest for the "shade tab on the backgrounds" mode. On background #3, the highest color difference was related to ZLS (6.48 ±0.23), and the lowest values were observed in the PICN group (1.02 ±0.31). On background #8, the highest color difference was related to ZLS compared with the "without backing" mode (8.62 ±0.27), and the lowest values were reported for ZLS compared with the "shade tab on the backgrounds" mode (1.27 ±0.44). The independent t test showed a statistically significant color difference on the 2 different backgrounds for all situations (P<.001). CONCLUSIONS Color selection of monolithic ceramics with the VITA Classical shade guide is improved by placing the VITA tabs on a similar background. Background color has a significant effect on the final shade of the monolithic ceramics. Choosing the correct color for LDS, ZLS, and PS-ZLS requires more care than for PICN and zirconia.
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Affiliation(s)
- Mohammadjavad Shirani
- Assistant Professor, Department of Prosthodontics, School of Dentistry, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Maryam Emami
- Instructor, Dentist, student Research Committee, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ramin Mosharraf
- Professor of Prosthodontics, Dental Materials Research Center, Department of Prosthodontics, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Omid Savabi
- Professor of Prosthodontics, Dental Materials Research Center, Department of Prosthodontics, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran; Professor of Prosthodontics, Dental Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mehrdad Akhavankhaleghi
- Assistant Professor, Department of Prosthodontics, School of Dentistry, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Kamran Azadbakht
- Assistant Professor, Department of Prosthodontics, School of Dentistry, Lorestan University of Medical Sciences, Khorramabad, Iran.
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Tejada-Casado M, Ghinea R, Pérez M M, Cardona J C, Ionescu A M, Lübbe H, Herrera L J. Color prediction of layered dental resin composites with varying thickness. Dent Mater 2022; 38:1261-1270. [PMID: 35715246 DOI: 10.1016/j.dental.2022.06.004] [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: 12/19/2021] [Revised: 04/05/2022] [Accepted: 06/01/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVE The aim of this study was to assess the accuracy of a Principal Components Analysis (PCA)-based method for reflectance reconstruction and color estimation of layered dental resin-based composites with different thicknesses. METHOD Bi-layered samples of different clinically relevant thicknesses were created using shades of VITAPAN Excell (VE), VITAPAN Dentine (VD) and VITA Physiodens (VP), combined with their corresponding enamel shades. Spectral reflectance of all samples was measured over a black background using a non-contact spectroradiometer with CIE 45∘∕0∘ geometry. Two different PCA-based models, built from two different configurations of known samples, were proposed to reconstruct the spectral data and color of unknown layered samples. Root Mean Square Error (RMSE), Goodness of Fit (GFC), as well as ΔE00 with corresponding 50:50% acceptability and perceptibly thresholds (AT and PT) were used as performance assessment. RESULTS The 5-samples training set approach provided an average RMSE < 0.015 and GFC > 0.999 when measured and predicted spectral reflectances were compared, while for the 9-samples training set, RMSE < 0.0098 and GFC > 0.9999 were obtained. The overall mean color differences obtained with the 5-samples training set approach were ΔE00 = 0.99 (AT% = 96.25% and PT% = 32.50%), while using the 9-samples training set resulted in lower overall mean color differences: ΔE00 = 0.50 (AT% = 99.22% and PT% = 83.87%). SIGNIFICANCE Within the framework of this study, the two proposed PCA-based configurations allow the prediction of the spectral reflectance of layered dental resin-based composites of different shades and thicknesses, with a high degree of accuracy.
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Affiliation(s)
- Tejada-Casado M
- Department of Optics, Faculty of Science, University of Granada, Campus de Fuentenueva, s/n 18071, Granada, Spain.
| | - Ghinea R
- Department of Optics, Faculty of Science, University of Granada, Campus de Fuentenueva, s/n 18071, Granada, Spain; Department of Physics, Faculty of Sciences, University of Craiova, 13 AI Cuza Street, Craiova 200585, Romania.
| | - Pérez M M
- Department of Optics, Faculty of Science, University of Granada, Campus de Fuentenueva, s/n 18071, Granada, Spain.
| | - Cardona J C
- Department of Optics, Faculty of Science, University of Granada, Campus de Fuentenueva, s/n 18071, Granada, Spain
| | - Ionescu A M
- Department of Optics, Faculty of Science, University of Granada, Campus de Fuentenueva, s/n 18071, Granada, Spain; Department of Physics, Faculty of Sciences, University of Craiova, 13 AI Cuza Street, Craiova 200585, Romania
| | - Lübbe H
- Vita Zahnfabrik H. Rauter GmbH & Co. KG, Ballyweg 6, 79713 Bad-Säckingen, Germany.
| | - Herrera L J
- Department of Computer Architecture and Computer Technology, E.T.S.I.I.T. University of Granada, s/n 18071, Granada, Spain.
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Reflectance and color prediction of dental material monolithic samples with varying thickness. Dent Mater 2022; 38:622-631. [DOI: 10.1016/j.dental.2021.12.140] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 12/19/2021] [Accepted: 12/20/2021] [Indexed: 11/30/2022]
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Shirani M, Savabi O, Mosharraf R, Akhavankhaleghi M, Hebibkhodaei M, Isler S. Comparison of translucency and opalescence among different dental monolithic ceramics. J Prosthet Dent 2021; 126:446.e1-446.e6. [PMID: 34304886 DOI: 10.1016/j.prosdent.2021.04.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 04/13/2021] [Accepted: 04/14/2021] [Indexed: 11/25/2022]
Abstract
STATEMENT OF PROBLEM Monolithic ceramic restorations designed by computer-aided design and computer-aided manufacturing are increasingly being used by clinicians. With the introduction of new materials, their optical characteristics also need to be investigated. PURPOSE The purpose of this in vitro study was to compare the translucency and opalescence of lithium disilicate, zirconia-reinforced lithium silicate, presintered zirconia-reinforced lithium silicate, polymer-infiltrated ceramic-network material, and multilayer zirconia. MATERIAL AND METHODS A total of 50 rectangular plates (14×12×1 mm) of 5 monolithic ceramics were prepared in this in vitro study (n=10). Each zirconia specimen was divided into 3 groups of incisal, middle, and gingival thirds. Each group was then evaluated separately. The color parameters of specimens were measured on 3 backgrounds, white, black, and #3 Ivoclar Natural Die Color material, by using a spectrophotometer. The translucency and opalescence of the specimens were determined by the relevant equations, and between-group comparisons were made. One-way ANOVA and Tamhane post hoc tests were used to compare groups (α=.05). RESULTS The difference among the groups was significant in translucency (F=137.346, df=6, P<.001), contrast ratio (F=134.148, df=6, P<.001), and opalescence parameters (F=128.028, df=6, P<.001). The 3 zirconia groups (10.87 ±0.54 to 11.88 ±0.26) had a significantly lower translucency than the other groups, and the zirconia-reinforced lithium silicate group (18.14 ±0.74) showed the highest translucency. Zirconia-reinforced lithium silicate (12.36 ±0.42) had the highest opalescence, and the lowest opalescence was found for polymer-infiltrated ceramic-network (5.43 ±0.28) and the incisal third of zirconia (5.45 ±1.06). CONCLUSIONS The zirconia-reinforced lithium silicate and presintered zirconia-reinforced lithium silicate specimens had the highest translucency and opalescence. The studied multilayer zirconia, which had different cubic phase values from incisal to gingival blank, showed similar translucency over the entire range, and differences among different regions were related to chromatic variables.
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Affiliation(s)
- Mohammadjavad Shirani
- Assistant Professor, Department of Prosthodontics, School of Dentistry, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Omid Savabi
- Professor of Prosthodontics, Dental Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ramin Mosharraf
- Professor of Prosthodontics, Department of Prosthodontics, Dental Materials Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Mehrdad Akhavankhaleghi
- Assistant Professor, Department of Prosthodontics, School of Dentistry, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Maliheh Hebibkhodaei
- Post Graduate student of Prosthodontics, Student Research Committee, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sabire Isler
- Professor of Prosthodontics, Department of Prosthodontics, Faculty of Dentistry, University of Istanbul, Istanbul, Turkey
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Optical behavior of one-shaded resin-based composites. Dent Mater 2021; 37:840-848. [PMID: 33658138 DOI: 10.1016/j.dental.2021.02.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 02/12/2021] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To evaluate optical properties, and translucency and opalescence parameters of one-shaded resin-based composites. METHODS Three one-shaded resin composites (OM - Omnichroma; VP - Venus Pearl; and VD - Venus Diamond) and a group-shaded resin composite (FU- Filtek Universal A2) were used. Three composite discs from each material were fabricated for each of the following thickness: 0.5, 1.0 and 2.0 mm. Diffuse reflectance was measured against white and black backgrounds using a calibrated spectroradiometer, CIE D65 illuminant and the CIE 45°/0° geometry. Translucency parameter (TP) was calculated using ΔEab * and ΔE00. Scattering (S) and absorption (K) coefficients and transmittance (T%) were calculated using Kubelka-Munk's equations, and a reflection spectrophotometer was used to measure the opalescence parameter (OP). Data was statistically analyzed using Kruskal-Wallis, Mann-Whitney tests, and VAF coefficient. RESULTS Spectral distributions of S, K and T were wavelength dependent, showing significant differences between materials of the same thickness and for different thicknesses of the same material (p < 0.001). OM showed the greatest translucency values for all thicknesses. Translucency decreased as thickness increased with statistically significant differences (p < 0.005). Values of ΔTPab and ΔTP00 between thicknesses were above of translucency thresholds for all materials. VP and VD showed the lowest OP values. SIGNIFICANCE One-shaded resin-based composites showed different optical behavior than the group-shaded resin-based composite. Understanding the optical behavior of the one-shaded resin-based composites is essential to optimize their clinical performance.
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Vasiliu S, Racovita S, Gugoasa IA, Lungan MA, Popa M, Desbrieres J. The Benefits of Smart Nanoparticles in Dental Applications. Int J Mol Sci 2021; 22:2585. [PMID: 33806682 PMCID: PMC7961614 DOI: 10.3390/ijms22052585] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 02/28/2021] [Accepted: 03/01/2021] [Indexed: 12/18/2022] Open
Abstract
Dentistry, as a branch of medicine, has undergone continuous evolution over time. The scientific world has focused its attention on the development of new methods and materials with improved properties that meet the needs of patients. For this purpose, the replacement of so-called "passive" dental materials that do not interact with the oral environment with "smart/intelligent" materials that have the capability to change their shape, color, or size in response to an externally stimulus, such as the temperature, pH, light, moisture, stress, electric or magnetic fields, and chemical compounds, has received much attention in recent years. A strong trend in dental applications is to apply nanotechnology and smart nanomaterials such as nanoclays, nanofibers, nanocomposites, nanobubbles, nanocapsules, solid-lipid nanoparticles, nanospheres, metallic nanoparticles, nanotubes, and nanocrystals. Among the nanomaterials, the smart nanoparticles present several advantages compared to other materials, creating the possibility to use them in various dental applications, including preventive dentistry, endodontics, restoration, and periodontal diseases. This review is focused on the recent developments and dental applications (drug delivery systems and restoration materials) of smart nanoparticles.
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Affiliation(s)
- Silvia Vasiliu
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, No. 41A, 700487 Iasi, Romania;
| | - Stefania Racovita
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, No. 41A, 700487 Iasi, Romania;
| | - Ionela Aurica Gugoasa
- Department of Natural and Synthetic Polymers, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, Prof. Dr. Docent Dimitrie Mangeron Street, No. 73, 700050 Iasi, Romania; (I.A.G.); (M.P.)
| | | | - Marcel Popa
- Department of Natural and Synthetic Polymers, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, Prof. Dr. Docent Dimitrie Mangeron Street, No. 73, 700050 Iasi, Romania; (I.A.G.); (M.P.)
- Academy of Romanian Scientists, Splaiul Independentei Street No. 54, 050085 Bucuresti, Romania
| | - Jacques Desbrieres
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Materiaux (IPREM), Pau and Pays de l’Adour University (UPPA), UMR CNRS 5254, Helioparc Pau Pyrenees, 2, av. President Angot, 64053 Pau CEDEX 09, France
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16
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Durand LB, Ruiz-López J, Perez BG, Ionescu AM, Carrillo-Pérez F, Ghinea R, Pérez MM. Color, lightness, chroma, hue, and translucency adjustment potential of resin composites using CIEDE2000 color difference formula. J ESTHET RESTOR DENT 2020; 33:836-843. [PMID: 33283966 DOI: 10.1111/jerd.12689] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/09/2020] [Accepted: 11/20/2020] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate color, lightness, chroma, hue, and translucency adjustment potential of resin composites using CIEDE2000 color difference formula. METHODS Three resin composites (Filtek Universal, Harmonize, and Omnichroma) were tested. Two types of specimens were prepared: an outer base shade with an inner hole filled with test shades and single-composite specimens of all shades. Spectrorradiometric reflectances measurements and subsequent CIELAB color coordinates and translucency parameter (TP) were performed. Color (CAP00 ), lightness, chroma, hue, and translucency (TAP00 ) adjustment potential using CIEDE2000 color difference were computed. Color and transparency differences among composite materials and shades were statistically tested (P < 0.05). RESULTS Positive CAP00 and TAP00 values were found for majority of tested materials. CAP00 values ranged from -0.14 to 0.89, with the highest values found for Omnichroma (>0.75 in all cases). TAP00 values ranged from -0.06 to 0.86 with significant translucency differences among dual and single specimens. Omnichroma exhibited the highest adjustment potential for all color dimensions studied. CONCLUSIONS Lightness, hue, chroma, and translucency adjustment potential have been introduced using CIEDE2000 color difference formula, and have shown their usefulness to evaluate blending effect in dentistry. Color coordinates and translucency adjustment potential were dependent on dental material. Omnichroma exhibited the most pronounced blending effect. CLINICAL SIGNIFICANCE Resin composites with increased color and translucency adjustment may simplify shade selection, making this process easier and less time consuming. Furthermore, these materials might facilitate challenging and complex color matching situations.
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Affiliation(s)
- Leticia B Durand
- Department of Restorative Dentistry, Federal University of Santa María, Santa María, Brazil
| | - Javier Ruiz-López
- Department of Optics, Faculty of Science, University of Granada, Granada, Spain
| | - Bibiana G Perez
- Department of Restorative Dentistry, Federal University of Santa María, Santa María, Brazil
| | - Ana M Ionescu
- Department of Optics, Faculty of Science, University of Granada, Granada, Spain.,Research Associate, Department of Physics, Faculty of Sciences, University of Craiova, Craiova, Romania
| | - Francisco Carrillo-Pérez
- Department of Computer Architecture and Computer Technology, E.T.S.I.I.T, University of Granada, Granada, Spain
| | - Razvan Ghinea
- Department of Optics, Faculty of Science, University of Granada, Granada, Spain.,Research Associate, Department of Physics, Faculty of Sciences, University of Craiova, Craiova, Romania
| | - María M Pérez
- Department of Optics, Faculty of Science, University of Granada, Granada, Spain
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Color inconstancy of natural teeth measured under white light-emitting diode illuminants. Dent Mater 2020; 36:1680-1690. [PMID: 33172605 DOI: 10.1016/j.dental.2020.10.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 07/27/2020] [Accepted: 10/06/2020] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To evaluate color and whiteness changes of natural teeth under nine white LED illuminants recently proposed by CIE. METHODS From spectral reflectance factors of 36 caries-free upper central incisors, corresponding colors under illuminant D65 and CIE 1931 standard colorimetric observer were computed for all tested illuminants, using the chromatic adaptation transform CAT16. Color differences (CIELAB and CIEDE2000 units) and whiteness (WID and WIO indices) from teeth illuminated by CIE standard illuminants (D65 and A) and white LED illuminants were calculated. The appearance of 630 pairs of teeth under all illuminants was also evaluated. RESULTS Color gamuts from 36 teeth under tested illuminants showed similar volume and shape in CIELAB color space, but their centers of gravity changed in many different directions with respect to colors under D65 or A illuminants: Considering colors under D65/A, color shifts produced by white LED illuminants were in the ranges 2.0-8.6/1.1-7.0 CIELAB units (1.4-8.2/0.6-6.8 CIEDE2000 units). Average WID and WIO values for the 36 teeth under different illuminants ranged from -5.8 to +19.3 and from -7.7 to +11.1, respectively. Considering 630 pairs of teeth, average color differences (mainly lightness differences) were below 0.5 CIELAB units (0.3 CIEDE2000 units), and average whiteness differences ranged from 8.1 to 10.7 for WID (23.4-25.1 for WIO). SIGNIFICANCE Using CIE LED illuminants, most changes in color and whiteness for individual teeth were above typical threshold values of perceptibility and acceptability in dentistry. However, considering pairs of teeth, the average color and whiteness differences under all tested illuminants were very similar.
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Günal Abduljalil B, Ongun S, Önöral Ö. How will surface conditioning methods influence the translucency and color properties of CAD-CAM resin-matrix ceramics with different thicknesses? J ESTHET RESTOR DENT 2020; 33:925-934. [PMID: 33006276 DOI: 10.1111/jerd.12667] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 08/17/2020] [Accepted: 09/14/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE It was aimed to evaluate the effect of various surface-conditioning methods on the translucency and color properties of resin-matrix ceramics (RMCs) with different types and thicknesses. MATERIALS AND METHODS Rectangle-shaped RMCs were prepared from Voco Grandio, Brilliant Crios, Lava Ultimate, GC Cerasmart, and Vita Enamic blocks at 0.5 and 1.0 mm thicknesses. Specimens were divided into four groups: control, airborne-particle abrasion (APA), 2 and 3 W Er, Cr:YSGG laser irradiations (L2W , L3W ) (n = 15). The color values of specimens were recorded before and after surface-conditioning using a spectrophotometer. The translucency parameter (RTP00 ) and color difference (ΔE00 ) values were calculated. Data were statistically analyzed using three-way ANOVA and Tukey post hoc tests. RESULTS The translucencies of RMCs decreased after all surface-conditioning procedures. L caused more decline in translucency of materials than APA. All ΔE00 values were under the acceptability threshold except for APA-applied Voco Grandio at 0.5 mm. Differences in ΔE00 values between APA and L3W groups were significant (P˂0.05); while differences between L2W and L3W groups were insignificant (P > .05). In all experimental groups, ΔE00 values decreased with increasing thickness of RMCs. CONCLUSIONS L and APA significantly affected the translucency and color properties of RMCs. APA was found more favorable than L. CLINICAL SIGNIFICANCE Clinicians should carefully use surface conditioning methods, considering their impact on the optical characteristics of RMCs, especially when the restoration is thin.
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Affiliation(s)
- Burcu Günal Abduljalil
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Nicosia, Turkey
| | - Salim Ongun
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Nicosia, Turkey
| | - Özay Önöral
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Nicosia, Turkey
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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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