Choice of resin cement shades for a high-translucency zirconia product to mask dark, discolored or metal substrates

Dai, Shiqi; Chen, Chen; Tang, Mo; Chen, Ying; Yang, Lǜ; He, Feng; Chen, Bingzhuo; Xie, Haifeng

doi:10.4047/jap.2019.11.5.286

Cited by 12 publications

(21 citation statements)

References 32 publications

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“…In practice, the thickness of the restoration is restricted by the minimal amount of tooth preparation, the different resin cement shades are limited and might be selected to slightly modify the final color [66][67][68][69][70]. Discolored substrates are common and therefore practitioners have to consider which kind of aesthetic material can better mask them and recover the optical properties of natural teeth [71].…”

Section: Discussionmentioning

confidence: 99%

Masking Abilities of Dental Cad/Cam Resin Composite Materials Related to Substrate and Luting Material

Vasiliu

Porojan

2022

Polymers

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An outstanding treatment challenge related to aesthetic monolithic materials is to mask discolored substrates in aesthetic areas. The purpose of the study is to evaluate the substrate masking ability of different resin composite materials and the influence of their association with luting agents and substrates. Five types of 2M2 HT (high translucency) resin composite materials were selected: Vita Enamic [E] and four types of nanoparticle-filled composites Lava Ultimate [L], Cerasmart [C], Shofu HC [S], and Hyramic [H]. Resin composite Vita VM LC with different shades was used for the substrates: 2M2, 3M2, and CP2. Variolink Esthetic Try-inpastes neutral, light+, and warm+ colors were chosen to simulate the luting agent color. Optical parameters (TP (translucency), CR (contrast ratio), and OP (opalesce)) and color differences ΔE (chromatic difference) were calculated. Statistical analyses were performed to evaluate the comparisons between the groups and establish correlations. TP average values for all materials were in the range of 21.49–24.53. OP average values were in the rage of 6.31–7.85. OP is moderate positive correlated to TP and CR is negative and strong correlated to TP. Related to materials, average color changes decrease as following: E > H > C > L > S. Referring to the tryin material, warm colors induce marked color changes of the restoration. The differences of the color changes determined by all studied substrates are significant. For the final aesthetic aspect of the restoration, it is essential to consider the underlying dental structure, luting agent, and restoration material as a whole unit. The masking ability of the investigated resin matrix ceramic materials materials shows differences, the best behavior demonstrated Shofu HC and Lava Ultimate. Marked color changes are related to high chroma substrates. For substrates with a darker color, the association with warm try-in pastes lead to marked color changes, but with neutral and light try-in pastes at most perceivable.

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Section: Discussionmentioning

confidence: 99%

Masking Abilities of Dental Cad/Cam Resin Composite Materials Related to Substrate and Luting Material

Vasiliu

Porojan

2022

Polymers

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“…11,26,50,54,56,59 When the masking ability was evaluated using the translucency parameter (TP), 95% of the studies used conventional TP 7,8,11,12,14,26,33,35,38,40,46,47,49,56,62 and 11% used the translucency parameter based on the CIEDE2000 color difference equation (TP 00 ). [56][57][58] It is a clinical challenge to select esthetic restorative materials and structures capable of masking an undesirable color substrate. Thus, several clinical and laboratory studies were performed simulating darkened dental substrates using metallic structures, [4][5][6]31,47,51,52,57,61,62 tetracycline stained dentin, 3 acrylic resins, 14,34,51 resin-based composites, 4,6,9,11,35,36,45,47,[50][51]…”

Section: #5mentioning

confidence: 99%

Experimental methodologies to evaluate the masking ability of dental materials: A systematic review

Santos

Brandeburski

Pecho

et al. 2021

J Esthet Restor Dent

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Objective: To conduct a systematic review on the masking ability of discolored substrates, analyzing the capacity and quality of the response produced by the different methodologies and techniques applied to overcome this clinical challenge. Materials and methods:The study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. The electronic search was conducted in MEDLINE/PubMed, Scopus and Web of Science databases, without date restriction. In vitro studies, written in English, applying different methodologies to evaluate masking ability were included. The variables of interest were: type, color and thickness of the restorative and/or cement material; use of pigments in the restorative material and/or cement; color of the substrate; and background color used for the evaluations.Results: Database search retrieved 307 eligible papers with a final inclusion of 47 published papers. Approximately 98% of the studies used ΔE, 36% used TP, and only 6% used CR to evaluate the masking ability of restorative materials. Conclusions:The most appropriate methodology to evaluate the masking ability is using color difference equations (ΔE) associated with the perceptibility and acceptability thresholds.Clinical significance: As different methodologies have been used to evaluate the masking ability of esthetic restorative materials on colored substrates, there is an urgent need to reach a consensus and propose a method, which is suggested by the present systematic review.

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“…Several factors influence the color appearance of zirconia restorations. Besides chemical composition and structure [ 3 , 6 ], other factors such as material thickness [ 5 , 7 , 8 ], processing parameters [ 9 , 10 ], shading technique and veneering material [ 11 ], substrate type and color [ 12 , 13 , 14 , 15 , 16 ], and luting agent [ 14 , 17 , 18 , 19 ] contribute to the overall color of the restoration.…”

Section: Introductionmentioning

confidence: 99%

“…Although extensive research has been recently conducted on the masking ability of restorative materials [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ], there is still missing information on how color differences might impact visual perception when translucent restorations are evaluated over different discolored substrates. Furthermore, there is little information about the colorimetric behavior of monolithic and layered zirconia crowns in combination with various abutment colors.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, there is little information about the colorimetric behavior of monolithic and layered zirconia crowns in combination with various abutment colors. Most studies evaluated the masking ability using rectangular or disc samples [ 12 , 13 , 15 , 16 , 17 , 19 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ], which do not reproduce the clinical conditions met in the oral cavity.…”

Section: Introductionmentioning

confidence: 99%

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Masking Ability of Monolithic and Layered Zirconia Crowns on Discolored Substrates

et al. 2022

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There is scarce information on the colorimetric behavior of monolithic and layered zirconia crowns in combination with various abutment colors. This study evaluated the masking ability on discolored substrates of monolithic and layered zirconia crowns. Anterior crowns were fabricated using 3Y-TZP zirconia and layering ceramic and divided into three groups: monolithic (ML), bi-layer (BL), and tri-layer (TL). The crowns were placed over eleven substrates (ND1-ND9, zirconia, metal), and CIE L*, a*, b*, C*, and h° color coordinates were measured in the cervical, middle, and incisal areas with a spectrophotometer. Masking ability was calculated using the color difference formula, and values were interpreted according to the perceptibility and acceptability thresholds. Data were analyzed statistically (α = 0.001). The L* coordinate was not significantly different between BL and TL crowns, regardless of the measurement area or substrate (p ≥ 0.001). In the middle area, the L* coordinate of the ML group was statistically different from the BL and TL groups only for zirconia and metal substrates, while in the incisal area, only for ND7 and metal substrates. The a* coordinate was significantly different between the ML and layered crowns for all measurement areas and substrates (except zirconia). The b* and C* coordinates differed significantly between the groups only in the cervical area (p < 0.001). The ML crown had better masking ability than the BL and TL crowns. However, the color differences for ML crowns were below the acceptability threshold for ND2, ND3, and ND7 substrates in the cervical and middle areas and below perceptibility threshold only for the incisal area. The lowest masking ability of the crowns was found for ND9 and metal substrates in all measurement areas.

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Choice of resin cement shades for a high-translucency zirconia product to mask dark, discolored or metal substrates

Cited by 12 publications

References 32 publications

Masking Abilities of Dental Cad/Cam Resin Composite Materials Related to Substrate and Luting Material

Masking Abilities of Dental Cad/Cam Resin Composite Materials Related to Substrate and Luting Material

Experimental methodologies to evaluate the masking ability of dental materials: A systematic review

Masking Ability of Monolithic and Layered Zirconia Crowns on Discolored Substrates

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