Description Module
The Description Module contains narrative descriptions of the clinical trial, including a brief summary and detailed description. These descriptions provide important information about the study's purpose, methodology, and key details in language accessible to both researchers and the general public.
Description Module path is as follows:
Study -> Protocol Section -> Description Module
Description Module
Ignite Creation Date:
2025-12-24 @ 11:33 PM
Ignite Modification Date:
2025-12-24 @ 11:33 PM
NCT ID:
NCT02884856
Brief Summary:
Visual shade matching (VSM) is the most common procedure to select an adequate shade in dentistry. This clinical procedure requires the use of a shade guide, being Vita Classical (VC) the most popular among the available guides. VSM is a subjective and inconsistent process with many observer related variables (e.g. color deficiency, experience, gender and eye fatigue) that can influence on the final color appearance. The gender influence on the accuracy of VSM is controversial.
The purpose of this study is to evaluate the VSM performed by female (F) and male (M) students, using VC shade guide, testing the null hypothesis that VSM is not influenced by gender.
Detailed Description:
* Female and male observers will be analyzed.
* Human upper central incisors (UCI) will be shade matched to shade tabs from Vita Classical (VC) shade guide.
* The spectral reflectances from the four UCI and from the 16 VC shade tabs will be measured using a spectroradiometer (SP).
* Measurements will be performed over a gray background, inside a viewing booth and under D65 illuminant (diffuse/0º geometry).
* CIELAB coordinates (L\*, a\* and b\*) will be calculated according to CIE D65 illuminant and CIE 2º Standard Observer.
* Two color difference metrics (CIELAB and CIEDE2000(2:1:1)) will be used to find the best option for each UCI, using VC shade guide.
* Data will be analyzed using descriptive statistics and McNemar test (α=0.05).
Study:
NCT02884856
Study Brief:
Protocol Section:
NCT02884856