Intervening Factors in Tooth Color Assessment

Study Overview
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Brief Summary
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The aim of this study is to evaluate the influence of several factors (light, extrinsic stain removal and operator's experience) in tooth color assessment. Tooth color will be assessed by two different operators with visual shade guides under standardized light conditions and using a light correcting device (Smile Lite) or with a dental spectrophotometer in human subjects. Color measurement will be made before and 1 week after dental prophylaxis.

Official Title
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Intervening Factors in Tooth Color Assessment

Conditions
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Tooth Color

Intervention / Treatment
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* Procedure: Dental prophylaxis
* Procedure: Tooth color assessment by the participant
* Procedure: Tooth color assessment by the investigator
* Procedure: Tooth color assessment with SpectroShade


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Capability to sign the informed consent Presence of upper teeth canines and central incisors, free of tooth decay, dental fillings, endodontic treatment or fixed rehabilitation Tooth color at least A3 in one of the included teeth Teeth should be possible to be subject to tooth color assessment with the predefined methods (color within the visual shade guides range) Absence of fixed orthodontic appliances or severe tooth structure anomalies Exclusion Criteria: Pregnant patients Patients subjected to professional dental prophylaxis in less than 4 months

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Dental prophylaxis<br>Visit 1: tooth color assessment (by patient, dentist and spectrophotometer) and professional dental prophylaxis Visit 2: tooth color assessment (by patient, dentist and spectrophotometer) | Procedure: Dental prophylaxis<br>* Professional dental prophylaxis including dental scaling and dental polishing with prophylactic paste<br>Procedure: Tooth color assessment by the participant<br>* Tooth color assessment using the VITA Classical shade guide. Assessment will be done with normal light conditions and with a light correcting device<br>Procedure: Tooth color assessment by the investigator<br>* Tooth color assessment using the VITA Classical shade guide and the VITA Toothguide 3D Master. Assessment will be done with normal light conditions and with a light correcting device<br>Procedure: Tooth color assessment with SpectroShade<br>* Tooth color assessment using SpectroShade (dental spectrophotometer). Color will be registered in VITA Classical and VITA Toothguide 3D Master and CIELab parameters<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Tooth color change determined before and after professional dental prophylaxis, assessed with visual shade guide (VITA Classical) | Tooth color will be determined prior to dental prophylaxis by the participant, investigator and spectrophotometer, using visual shade guide VITA Classical. 1 week after the intervention, the tooth color will be determined once again with the same protocol. | 1 week (measurements before and 1 week after dental prophylaxis) | 
| Tooth color change measured before and after professional dental prophylaxis, assessed with visual shade guide (VITA Toothguide 3D-Master) | Tooth color will be determined prior to dental prophylaxis by the investigator and dental spectrophotometer, using visual shade guide VITA Toothguide 3D-Master. 1 week after the intervention, the tooth color will be determined once again with the same protocol. | 1 week (measurements before and 1 week after dental prophylaxis) | 
| Tooth color change in CIELab system measured before and after professional dental prophylaxis | Tooth color in CIELab system will be determined by the conversion of VITA Classical shade guides in CIELab parameters assessed by the participant and investigator and by the spectroshade prior to professional dental prophylaxis. 1 week after the procedure tooth color will be determined once again with the same protocol. | 1 week (measurements before and 1 week after dental prophylaxis) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Agreement between operators in tooth color assessment with visual shade guides | Comparison of tooth colors determined by the participant, investigator and spectrophotometer. | Sequencial; repeated before and 1 week after intervention | 
| Influence of light conditions in tooth color assessment - change between determination with and without a light correcting device | Tooth color determined by the participant and investigator with visual shade guides with two different light conditions: environmental light and assessment with a light correcting device (Smile Lite) | Sequencial; repeated before and 1 week after intervention | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Visual shade guide, Tooth extrinsic stain, Tooth color, Dental prophylaxis, Dental spectrophotometer