The Midwest Caries I.D. uses fiberoptic technology and light-emitting diodes to accurately detect cavities-even when lesions are in their earliest stages. The device emits sound and light signals when a cavity is detected, enabling us to locate, diagnose, and treat the affected area and avoid unnecessary work on healthy tooth surfaces. When used as a diagnostic aid in conjunction with an x-ray, the Midwest Caries I.D. allows us to assess a third dimension-the volume of caries- before even beginning to open the cavity. The device also provides us with an option for examining and diagnosing children, pregnant women, and patients who prefer to forgo x-rays or limit their exposure for health reasons.