It is the laser device that safely diagnoses caries, even at an early stage. The combination of classic probing and radio diagnosis is sufficiently important. However, probing can damage healthy tooth substance and cause pain and stress for the patient.

Radiographs are still associated with unnecessary radiation dose and in many cases are not suitable for early caries diagnosis. In contrast, the laser fluorescence method of the Diagnodent Pen 2190 is suitable for the early diagnosis of caries and periodontitis without X-rays or probing.