Optical Properties of Light Cured Luting Agent on Laminate Veneer

Optical Properties of Laminate Veneers Clinical Trial

Official title:

Randomized Clinical Trial of Light Cured Luting Agents on Laminate Veneers

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02464540
• Other study ID #: FUPelotas
• Status: Completed
• Phase: N/A
• Start date: March 2015
• Est. completion date: March 2018

Study information

• Verified date: February 2020
• Source: Federal University of Pelotas
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

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.

Description:

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 11
• Est. completion date: March 2018
• Est. primary completion date: July 2016
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Minimum 18 years of age

• Patients with diastema

• Conoid teeth

• Misaligned anterior teeth

• Discolored teeth and/or teeth with erosion/abrasion

• Posterior occlusal stability

• Individuals who are willing to attend the clinics on predetermined days, to agree to sign the consent form and clarified, after receiving information about the study objectives, risks and benefits associated with the procedures.

Exclusion Criteria:

• Patients with extensive loss of tooth structure

• Subjects suffering from temporomandibular disorders, neurological and oral mucosa diseases

• Inadequate oral hygiene or periodontal problems

• Smokers

Related Conditions & MeSH terms

• Optical Properties of Laminate Veneers

Intervention

Procedure:
• Laminate veneers luted with light-cured resin cement
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 (?E) 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.
• Laminate veneers luted with light-cured flowable composite
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 (?E) 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.

Locations

Country	Name	City	State
Brazil	Noéli Boscato	Pelotas	RS

Sponsors (1)

Lead Sponsor	Collaborator
Federal University of Pelotas

Country where clinical trial is conducted

Brazil, 

Outcome

Type	Measure	Description	Time frame	Safety issue
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 (?E) 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)