Effect of Polymerization on the Color of Resin Composites

Dokumacigil, G; Murat, Naci; Atalı, Pinar Yılmaz; Tarçın, Bilge; Göçmen, Gülçin Bilgin

doi:10.2341/20-155-l

Cited by 6 publications

(9 citation statements)

References 35 publications

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“…As such, it is possible to obtain the chameleon effect and adjust the composite material to the colour of the tooth in which it is placed. This facilitates the selection of the colour by the dentist and reduces the number of colours of composite materials used in everyday practise [ 9 ]. At present, many composite materials can be found on the market.…”

Section: Introductionmentioning

confidence: 99%

Influence of Storing Composite Filling Materials in a Low-pH Artificial Saliva on Their Mechanical Properties—An In Vitro Study

Alhotan

Raszewski²,

Alamoush

et al. 2023

JFB

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Restorative composites are subjected to various influences in the oral cavity environment, such as high or low temperatures, the mechanical force generated during mastication, colonization of various microorganisms, and low pH, which may result from ingested food and the influence of microbial flora. This study aimed to investigate the effect of a recently developed commercial artificial saliva (pH = 4, highly acidic) on 17 commercially available restorative materials. After polymerization, the samples were stored in an artificial solution for 3 and 60 days and subjected to crushing resistance and flexural strength tests. The surface additions of the materials were examined in terms of the shapes and sizes of the fillers and elemental composition. When stored in an acidic environment, the resistance of the composite materials was reduced by 2–12%. Larger compressive and flexural strength resistance values were observed for composites that could be bonded to microfilled materials (invented before 2000). This may result from the filler structure taking an irregular form, which results in a faster hydrolysis of silane bonds. All composite materials meet the standard requirements when stored for a long period in an acidic environment. However, storage of the materials in an acid environment has a destructive impact on the materials’ properties.

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Section: Introductionmentioning

confidence: 99%

Influence of Storing Composite Filling Materials in a Low-pH Artificial Saliva on Their Mechanical Properties—An In Vitro Study

Alhotan

Raszewski²,

Alamoush

et al. 2023

JFB

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“…Limited research and information are available on the mechanical, spectral, and structural properties of seven different SsURCs. Color adjustment potential [19,20], shade match [21], optical behavior [22], color stability [1], cytotoxicity [23], F S , and E M [24,25] of Omnichroma; quasi-static and viscoelastic behavior [26] of Charisma Diamond and Omnichroma; shrinkage [27], color change, surface roughness [28], micro-hardness [29] and contrast ratio of Vittra APS; color stability [30], F S and depth of cure [31] of Optishade; color stability, surface properties [1,32], shrinkage stress, E M [33] and DC [34] of Admira fusion X-tra; F S , E M , [35], color stability [36][37][38] of Essentia have been evaluated and investigated in previous research [19,24,38].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Micro-Hardness, Degree of Conversion, and Flexural Strength for Single-Shade Universal Resin Composites

et al. 2022

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Single-shade universal resin composites (SsURC) are preferred in clinical practice to reduce time for shade selection and obtain good esthetic results. In this study, the static mechanical properties of seven new SsURCs were investigated, their spectral analyzes were performed and scanning electron microscopy (SEM) evaluations were presented. Charisma Diamond One/DO, Admira Fusion x-tra/AFX, Omnichroma/OC, OptiShade/OS, Essentia Universal/EU, Zenchroma/ZC, Vittra APS Unique/VU were used in a three-point bending test to determine flexural strength (FS) and elastic modulus (EM); Vickers micro-hardness (VHN) and hardness-ratio (HR) were performed with a micro-hardness tester from top/bottom after 24-h/15-days of storage in distilled water at 37°C (±1 °C). The degree of conversion (DC) was assessed by using Fourier transform infrared spectroscopy (FTIR). The structure of the resin matrix and filler content were assessed by SEM. Data were analyzed using IBM SPSS V23 and the R program and the significance level was taken as p < 0.05. The main effect of the tested SsURCs was found to be statistically significant on FS, EM, VHN, and DC values (p < 0.001). Bis-GMA free SsURCs (AFX, DO, VU) showed better DC and HR except for OC. All seven tested SsURCs conform to the requirements of ISO standards for dental resin composites for all tested categories.

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“…The color of RBCs changes after polymerization, therefore the decision of color matching/mismatching should be considered at least 24 h after polymerization 34,35 . Accordingly, although the evaluation period in this study was relatively short, it was quite appropriate for the evaluation of color match and translucency criteria.…”

Section: Discussionmentioning

confidence: 99%

“…The color of RBCs changes after polymerization, therefore the decision of color matching/mismatching should be considered at least 24 h after polymerization. 34,35 Accordingly, although the evaluation period in this study was relatively short, it was quite appropriate for the evaluation of color match and translucency criteria. All the restorations were performed using composites with high color adjustment potentials, without performing the shade selection with regards to the claim of the manufacturers that they have the ability to match all 16 Vita Classic shades A1 to D4.…”

Section: Clinical Imagesmentioning

confidence: 99%

Two‐year retrospective evaluation of monoshade universal composites in direct veneer and diastema closure restorations

Ünal¹,

Can

2022

J Esthet Restor Dent

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Objectives The aim of this retrospective evaluation was to assess the short‐term outcome of two monoshade universal resin composites with high chameleon effect in anterior direct veneer and diastema closure restorations, and to investigate the possible reasons for failure. Material and Methods Patients subjected to veneer and diastema closure restorations with two monoshade universal resin composites (Essentia Universal Shade; EU, GC Corp., and Omnichroma; OC, Tokuyama) operated between January 2018 and March 2019 were selected for the present retrospective evaluation. A total of 159 composite restorations (78 veneers and 81 diastema closure restorations) performed by a single operator in 44 patients (mean age: 33.6) were included in the study. Two blinded and calibrated examiners performed 1‐ and 2‐year assessments of the restorations with respect to FDI criteria, using medical/clinical history and dental photography records. Data were analyzed using Pearson Chi‐square with Continuity Correction, Fisher's Exact tests, and Cox regression (a < 0.05). Results The cumulative overall survival rates of EU and OC restorations were 94.6% (97.3% for the first year) and 88.6% (95.3% for the first year), respectively, with no significant difference from each other (p = 0.316). The cumulative overall survival rates of direct veneer and diastema closure restoration types were 90.2% (95.1% for the first year) and 92.4% (97.4% for the first year), respectively, with no significant difference (p = 0.559). The reasons for failure were evaluated as fracture of the restoration, failure in esthetic anatomical form, and color mismatch. All the failed direct veneer restorations were due to fractures (FDI score of 5.4), whereas 5 of 6 failed diastema closure restorations were due to color mismatch (FDI score of 3.4). Regarding the composite materials, there were no significant differences between the success rates of the restoration types (p = 0.442 for EU, p = 1.000 for OC). With respect to the restoration types, there were also no significant differences between the success rates of the resin‐based composites (p = 1.000 for direct veneer restorations and p = 0.228 for the diastema closure restorations). In addition, no significant difference was observed between male and female patients regarding the acceptable and unacceptable scores (p = 1.000). Conclusions The 2‐year clinical performance of the two monoshade universal composites in anterior veneer and diastema closure restorations were both considered successful and similar. Despite the lack of shade selection, both monoshade universal composites presented a successful color match. However, the diastema closure restorations might be more prone to color mismatch compared to the veneers over time, while veneer restorations presented more fractures than the diastema closure restorations. Clinical Significance Monoshade universal composites presented successful short‐term clinical outcomes regarding both function and esthetics in anterior direct veneer and diastema closure r...

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Effect of Polymerization on the Color of Resin Composites

Cited by 6 publications

References 35 publications

Influence of Storing Composite Filling Materials in a Low-pH Artificial Saliva on Their Mechanical Properties—An In Vitro Study

Influence of Storing Composite Filling Materials in a Low-pH Artificial Saliva on Their Mechanical Properties—An In Vitro Study

Assessment of Micro-Hardness, Degree of Conversion, and Flexural Strength for Single-Shade Universal Resin Composites

Two‐year retrospective evaluation of monoshade universal composites in direct veneer and diastema closure restorations

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