ACCURATE MEASUREMENT OF TOOTH COLOR AND TRANSLUCENCY

精确测量牙齿颜色和透明度

• 批准号: 6200649
• 负责人: George K Stookey
• 金额: $ 9.93万
• 依托单位: THERAMETRIC TECHNOLOGIES, INC.
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-30 至 2002-09-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6200649
• 关键词: biomedical equipment development; charge coupled device camera; colorimetry; dental adhesive /sealant; dental agent; dental visualization; oral facial restoration; spectrometry; tooth enamel

DESCRIPTION: The Specific Aim of this application is to develop a device-independent measurement system to measure the color and translucency of human dentition. Accurate measurement of tooth color and translucency is essential for tooth matching in the restorative procedures. Such an accurate and device-independent technique also can be used in assessing the effectiveness of bleaching procedures. In this project, a spectroradiometer along with the standard color test targets will be used to determine the spectral characteristics of the illumination source and the CCD sensor of a digital camera. The calibration will be achieved in two steps: 1) measuring the spectral characteristics of the light sources (a viewing booth and an electronic flash); 2) obtaining a transformation from camera red-green-blue (RGB) to a device-independent color set. To obtain the color transformation for the camera, a set of test targets of known color components will be used. Each test target is measured twice: 1) using the digital camera to be calibrated; and 2) using a highly accurate spectroradiometer. The spectroradiometer serves as the reference standard. The steps involved in the calibration procedure will be encapsulated in a computer program, which automatically computes the final transformation matrix. This approach will be used to measure color and translucency of 150 extracted teeth and compare them with the spectroradiometric measurements. A GUI will be designed which can be used to measure color of spots/regions/area and obtain the best shade match. Success in this step will allow not only the testing of the technique, clinically in Phase 2, wherein there are also plans to assess capability of the system in measuring other aspects of tooth appearance, such as fluorescence, but also the evaluation of a digital intraoral camera for this task. PROPOSED COMMERCIAL APPLICATION: NOT AVAILABLE

描述：本应用程序的具体目的是开发 与设备无关的测量系统，以测量 人类牙列。准确测量牙齿颜色和透明度为 在恢复过程中对牙齿匹配必不可少的。如此准确 和与设备无关的技术也可以用于评估 漂白程序的有效性。在这个项目中，光谱计 以及标准的颜色测试目标，将用于确定 照明源的光谱特征和A的CCD传感器 数码相机。校准将分两个步骤：1）测量 光源的光谱特征（一个观看亭和一个 电子闪光）; 2）从摄像机红绿色蓝色获得转换 （RGB）到独立于设备的颜色集。获得颜色转换 将使用相机，一组已知颜色组件的测试目标。每个 测试目标是两次测量的：1）使用要校准的数码相机； 2）使用高度精确的光谱计。光谱计提供 作为参考标准。校准过程中涉及的步骤将 被封装在计算机程序中，该程序将自动计算最终 转换矩阵。这种方法将用于测量颜色和 半透明的150颗牙齿，并将其与 光谱测量测量值。将设计一个可以用来的GUI 测量斑点/区域/区域的颜色，并获得最佳的阴影匹配。成功 此步骤不仅允许在临床上进行该技术的测试 2，其中还计划评估系统的能力测量能力 牙齿外观的其他方面，例如荧光，也是 为此任务评估数字摄像头。 拟议的商业应用程序：不可用