Shade guide, method for discriminating tooth colors, artificial tooth manufacturing method

• Main Authors: NEGORO NORIYUKI, YASUI MASUHITO, SHOU KOUJI, YAMAMOTO MAKOTO, YOSIMOTO RYUICHI
• Format: Patent
• Language: English
• Published: 03.11.2015
• Subjects: APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE; DENTISTRY; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE

In a shade guide, a plurality of shade tabs whose colors are mutually different are arranged regularly based on the colors. The arrangement of the plurality of shade tabs is an arrangement determined based on: S values and V values that are determined according to to which areas, from among areas partitioned by a plurality of straight lines in an L*-C* plane, the coordinates of the colors of the shade tabs belong, and H values that are determined according to to which areas, from among areas partitioned by a plurality of straight lines in an a*-b* plane, the coordinates belong. S groups, each of which is a shade tab group having a common S value, are arranged in the shade guide. V rows, each of which is a shade tab group having a common V value, are arranged in each S group. In each V row, the plurality of shade tabs have mutually different H values and are aligned in an order that is in accordance with the H values. Using this shade guide enables precisely and easily discriminating the color of an evaluation target tooth.