Allocation of color space for different age groups using three-dimensional shade guide systems.

Purpose: To determine the color space and the coverage error of two manual shade guide systems in four age groups of a selected population.

Material And Methods: A total of 174 patients were divided into four age groups and the shade of their natural teeth was measured (2067 teeth) with a spectrophotometer (Vita Easyshade). Color parameters in terms of L*, a*, b* values, chroma, and hue were recorded for each tooth.

Does gender and experience influence shade matching quality?

Objectives: To evaluate the influence of gender and level of experience on shade matching quality.

Methods: A study was simultaneously performed at 15 universities located in 9 countries. A total of 614 color normal participants completed all phases of the experiment.