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The aim of this randomized clinical trial is to evaluate the influence of luting agent, thickness and color of laminate veneers (LVs) and color of dental substrate on the optical properties of LVs.
The following date will be collected (i) the color of dental substrate obtained before and after dental preparation, (ii) the thickness and color of the LVs obtained before of the cementation procedures on white and black value background, (iii) and the final color of the LVs bonded to dental substrates obtained after cementation. For LVs cementation two cements will be used, the light-cured resin cement and the flowable composite, which will be randomly divided into two groups (n=31). The color of LVs will be performed with visual evaluation based on Vita and 3D Master scales and with a spectrophotometer Vita Easyshade (Vita Zahnfabrik / Bad Saeckingen, Germany) based on CIEL*a* b system. Data collected will be evaluated for translucency parameter (TP) and color variation (ΔE) according to luting agent, thickness and color of the LVs as well as color of dental substrate. Additionally, the color obtained with visual evaluation and with spectrophotometer will be compared to evaluate the level of agreement between the color observed by the operator and the color named by the spectrophotometer.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Light-cured resin cement | Active Comparator | Laminate veneers luted using light-cured resin cement |
|
| Light-cured flowable composite | Active Comparator | Laminate veneers luted using light-cured flowable composite |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Laminate veneers luted with light-cured resin cement | Procedure | After the use of light-cured luting agent the color of laminate venners will be performed with visual evaluation based on Vita and 3D Master scales and with a spectrophotometer Vita Easyshade (Vita Zahnfabrik / Bad Saeckingen, Germany) based on CIEL*a* b system. Data collected will be evaluated for translucency parameter (TP) and color variation (ΔE) according to luting agent, thickness and color of the LVs as well as color of dental substrate. Additionally, the color obtained with visual evaluation and with spectrophotometer will be compared to evaluate the level of agreement between the color observed by the operator and the color named by the spectrophotometer. |
| Measure | Description | Time Frame |
|---|---|---|
| Optical Properties of Laminate Veneers | The color of laminate veneers will be performed with a spectrophotometer Vita Easyshade (Vita Zahnfabrik / Bad Saeckingen, Germany) based on Vita and 3D Master scales and on CIEL*a* b system. Data collected will be evaluated for translucency parameter (TP) and color difference (ΔE) according the thickness and color of the laminate veneers as well as color of dental substrate. The acceptable threshold color difference for the CIEDE2000 method is 1.8 (Paravina et al, 2015). Greater color variation is desirable when a shade match between darker and lighter adjacent tooth substrates is required and values above the clinical thresholds for acceptability of color differences indicating lower masking ability of the material. "Level of Agreement Between the Color Observed by the Operator and the Color Named by the Spectrophotometer" was included as a Primary or Secondary Outcome Measure, but data was not collected. | after luting the laminate veneers (at least 1 hours after cementation) |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Noéli Boscato, PhD | Federal University of Pelotas | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Noéli Boscato | Pelotas | Rio Grande do Sul | 96015-560 | Brazil |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 39528774 | Derived | Perroni AP, Barbon FJ, Chaves ET, Alberton da Silva S, de Moraes RR, Boscato N. Exploring the influence of tooth, ceramic, and resin luting agent variations on laminate veneer optical characteristics: a prospective clinical investigation. Clin Oral Investig. 2024 Nov 12;28(12):639. doi: 10.1007/s00784-024-06032-3. |
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| ID | Title | Description |
|---|---|---|
| FG000 | Light-cured Resin Cement | Ceramic restorations were cemented using translucent shade of photoactivated resin cement (RelyX Veneer; 3M ESPE). |
| FG001 | Light-cured Flowable Composite | Ceramic restorations were cemented using translucent shade of flowable composite (Tetric N-Flow; Ivoclar Vivadent AG) |
| Title | Milestones | Reasons Not Completed | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
|
17 restorations cemented with light-cured resin cement and 38 cemented with light-cured flowable composite.
| ID | Title | Description |
|---|---|---|
| BG000 | Light-cured Resin Cement - Light-cured Flowable Composite | Ceramic restorations were cemented using translucent shade of photoactivated resin cement or Light-cured flowable composite. Participants enrolled in both arms, luting material to be used was randomly selected. |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Mean |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | Optical Properties of Laminate Veneers | The color of laminate veneers will be performed with a spectrophotometer Vita Easyshade (Vita Zahnfabrik / Bad Saeckingen, Germany) based on Vita and 3D Master scales and on CIEL*a* b system. Data collected will be evaluated for translucency parameter (TP) and color difference (ΔE) according the thickness and color of the laminate veneers as well as color of dental substrate. The acceptable threshold color difference for the CIEDE2000 method is 1.8 (Paravina et al, 2015). Greater color variation is desirable when a shade match between darker and lighter adjacent tooth substrates is required and values above the clinical thresholds for acceptability of color differences indicating lower masking ability of the material. "Level of Agreement Between the Color Observed by the Operator and the Color Named by the Spectrophotometer" was included as a Primary or Secondary Outcome Measure, but data was not collected. | 38 ceramic restorations were cemented (25 laminate veneers, 13 crowns; 37 in anterior teeth; 1 in posterior tooth). | Posted | Mean | Standard Deviation | Delta E (color change) | after luting the laminate veneers (at least 1 hours after cementation) | ceramic restoration | ceramic restoration |
immediately after luting restoration (an average 1 hours after cementation)
Side effects of the dental procedures (pain, fracture, debonding) were recorded.
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Light-cured Resin Cement | Ceramic restorations were cemented using translucent shade of photoactivated resin cement. |
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Dr Noéli Boscato | Federal University of Pelotas | 5553999530000 | noeliboscato@gmail.com |
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|
| Laminate veneers luted with light-cured flowable composite | Procedure | After the use of light-cured luting agent the color of laminate veneers will be performed with visual evaluation based on Vita and 3D Master scales and with a spectrophotometer Vita Easyshade (Vita Zahnfabrik / Bad Saeckingen, Germany) based on CIEL*a* b system. Data collected will be evaluated for translucency parameter (TP) and color variation (ΔE) according to luting agent, thickness and color of the LVs as well as color of dental substrate. Additionally, the color obtained with visual evaluation and with spectrophotometer will be compared to evaluate the level of agreement between the color observed by the operator and the color named by the spectrophotometer. |
|
| ceramic restoration |
|
| years |
| Participants |
|
| Sex: Female, Male | Count of Participants | Participants | No | Participants |
|
| ID | Title | Description |
|---|---|---|
| OG000 | Light-cured Resin Cement | Color change was estimated by calculating the CIEDE2000 formula. Corresponding ΔE00 values for perceptibility and acceptability were 0.8 and 1.8, respectively. (Paravina, 2015) |
| OG001 | Light-cured Flowable Composite | Color change was estimated by calculating the CIEDE2000 formula. Corresponding ΔE00 values for perceptibility and acceptability were 0.8 and 1.8, respectively. (Paravina, 2015) |
|
|
| 0 |
| 11 |
| 0 |
| 11 |
| EG001 | Light-cured Flowable Composite | Ceramic restorations were cemented using translucent shade of photoactivated flowable composite. | 0 | 11 | 0 | 11 |
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