BACKGROUND/AIM Color matching in prosthodontic therapy is a very important task because it influences the esthetic value of dental restorations. Visual shade matching represents the most frequently applied method in clinical practice. Instrumental measurements provide objective and quantified data in color assessment of natural teeth and restorations. In instrumental shade analysis, the goal is...

OBJECTIVE To test the null hypothesis that there is no color change when enamel porcelain thickness is changed and to evaluate the ability of a shade guide to prescribe chroma. METHODS Three shades (3M1, 3M2 and 3M3) were selected from a Vitapan 3D master shade guide. Five disk specimens were prepared for each shade, consisting of three layers (opacious dentin, dentin and enamel) at thickness...

Background: Shade determination for direct and indirect restorations has always been a challenging aspect of esthetic dentistry. Hence; the present study was conducted assessing Interoperator Variability in Selection using Two Guides. Materials & methods: different shade guides used were: Guide 1- Vitapan classical guide 2-VITA toothguide 3D-Master guide. A total 40 subjects were enrolled. ...

STATEMENT OF PROBLEM There are several electronic shade-matching instruments available for clinical use, but the reliability and accuracy of these instruments have not been thoroughly investigated. PURPOSE The purpose of this in vitro study was to evaluate the reliability and accuracy of 4 dental shade-matching instruments in a standardized environment. MATERIAL AND METHODS Four shade-match...

Objectives: To compare shade matching skills of color normal males and females. Material and Methods: A total of 174 dental students of both genders (117 females and 57 males, 20 to 25 years old), with no experience in color matching in dentistry, participated in the study. All recruited students passed the Ishihara color vision test for color deficiency, and matched the colors of eight shade t...

Purpose: Dental shade guides are commonly used for color determination and should be disinfected and sterilized. The purpose of this study was to evaluate the color change of Vita 3D Master shade tabs after disinfection and sterilization. Material and methods: Overall, 98 samples (shade tabs) were randomly selected from 14 new, unused Vita 3D sets, including the following shades: 2M1, 3L1.5, 3M...

OBJECTIVE The objective of this study was to investigate the intra and interdevice reliability of two tooth color measurement devices: EasyShade (ES) and SpectroShade Micro (SSM). MATERIALS AND METHODS Tooth color was measured in six maxillary and mandibular. L*, a* and b* values and shade matches to VITA Classical and Vitapan 3D-Master shade guide systems were determined for all teeth. ΔE wa...

The objective of this study was to correlate shades of teeth to skin color according to age and gender. The study sample comprised 200 patients ranging in age from 16 to 55 years, divided into four age groups of 50 each. Shade of middle third of labial surface of maxillary central incisor was recorded visually with the help of Vitapan 3D-Master shade guide under standardized lighting. Color of ...

The purpose of this study was to re-arrange the master Bioform shade guide into a long-range one-dimensional color system based upon color difference. Although most shade guides may show local order when arranged according to hue, long-range order has not been established. However, shade guide arrangement according to a logical color order would be an advantage to the user. The first step in de...

We present a technique for rendering animated 3D models in a Su-Muk painting style with user’s guide. First, a user can sketch directly over 3D models by varying ink and water values. And we simulate the behavior of ink-water directly on 3D model for consistent shade information over 3D models. After simulation, ink and water are spread over a 3D surface appropriately. Second, to achieve a real...