Intervening Factors in Tooth Color Assessment

Not Applicable

• Conditions: Tooth Color
• Interventions: Procedure: Dental prophylaxis; Procedure: Tooth color assessment by the participant; Procedure: Tooth color assessment by the investigator; Procedure: Tooth color assessment with SpectroShade

• Registration Number: NCT03544658
• Lead Sponsor: Grupo de Investigação em Bioquímica e Biologia Oral

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2018-04-30
• Status Verified: 2018-05
• Study First Submitted QC: 2018-05-31
• Last Update Submitted: 2018-05-31
• Study Start: 2018-06-01
• Study First Posted: 2018-06-04
• Last Update Posted: 2018-06-04
• Primary Completion: 2018-07-30
• Study Completion: 2018-07-30

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 50

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Dental prophylaxis	Tooth color assessment by the investigator	Visit 1: tooth color assessment (by patient, dentist and spectrophotometer) and professional dental prophylaxis Visit 2: tooth color assessment (by patient, dentist and spectrophotometer)
Dental prophylaxis	Dental prophylaxis	Visit 1: tooth color assessment (by patient, dentist and spectrophotometer) and professional dental prophylaxis Visit 2: tooth color assessment (by patient, dentist and spectrophotometer)
Dental prophylaxis	Tooth color assessment by the participant	Visit 1: tooth color assessment (by patient, dentist and spectrophotometer) and professional dental prophylaxis Visit 2: tooth color assessment (by patient, dentist and spectrophotometer)
Dental prophylaxis	Tooth color assessment with SpectroShade	Visit 1: tooth color assessment (by patient, dentist and spectrophotometer) and professional dental prophylaxis Visit 2: tooth color assessment (by patient, dentist and spectrophotometer)

Primary Outcome Measures

Name	Time	Method
Tooth color change measured before and after professional dental prophylaxis, assessed with visual shade guide (VITA Toothguide 3D-Master)	1 week (measurements before and 1 week after dental prophylaxis)	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.
Tooth color change determined before and after professional dental prophylaxis, assessed with visual shade guide (VITA Classical)	1 week (measurements before and 1 week after dental prophylaxis)	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.
Tooth color change in CIELab system measured before and after professional dental prophylaxis	1 week (measurements before and 1 week after 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.

Secondary Outcome Measures

Name	Time	Method
Agreement between operators in tooth color assessment with visual shade guides	Sequencial; repeated before and 1 week after intervention	Comparison of tooth colors determined by the participant, investigator and spectrophotometer.
Influence of light conditions in tooth color assessment - change between determination with and without a light correcting device	Sequencial; repeated before and 1 week after intervention	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)

Trial Locations

Locations (1)

Faculdade de Medicina Dentária, Universidade de Lisboa; 🇵🇹 Lisboa, Portugal